forked from KolibriOS/kolibrios
3232 lines
92 KiB
C
3232 lines
92 KiB
C
/* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
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*/
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/*
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* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/slab.h>
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#include <drm/drmP.h>
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#include <drm/i915_drm.h>
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#include "i915_drv.h"
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#include "i915_trace.h"
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#include "intel_drv.h"
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#define assert_spin_locked(a)
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static const u32 hpd_ibx[] = {
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[HPD_CRT] = SDE_CRT_HOTPLUG,
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[HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
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[HPD_PORT_B] = SDE_PORTB_HOTPLUG,
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[HPD_PORT_C] = SDE_PORTC_HOTPLUG,
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[HPD_PORT_D] = SDE_PORTD_HOTPLUG
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};
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static const u32 hpd_cpt[] = {
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[HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
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[HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
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[HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
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[HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
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[HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT
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};
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static const u32 hpd_mask_i915[] = {
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[HPD_CRT] = CRT_HOTPLUG_INT_EN,
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[HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
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[HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
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[HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
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[HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
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[HPD_PORT_D] = PORTD_HOTPLUG_INT_EN
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};
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static const u32 hpd_status_gen4[] = {
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[HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
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[HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
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[HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
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[HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
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[HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
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[HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
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};
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static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */
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[HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
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[HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
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[HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
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[HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
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[HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
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[HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
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};
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#define pr_err(fmt, ...) \
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printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
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#define DRM_WAKEUP( queue ) wake_up( queue )
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#define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue )
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#define MAX_NOPID ((u32)~0)
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/* For display hotplug interrupt */
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static void
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ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
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{
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assert_spin_locked(&dev_priv->irq_lock);
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if (dev_priv->pc8.irqs_disabled) {
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WARN(1, "IRQs disabled\n");
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dev_priv->pc8.regsave.deimr &= ~mask;
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return;
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}
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if ((dev_priv->irq_mask & mask) != 0) {
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dev_priv->irq_mask &= ~mask;
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I915_WRITE(DEIMR, dev_priv->irq_mask);
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POSTING_READ(DEIMR);
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}
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}
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static void
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ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
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{
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assert_spin_locked(&dev_priv->irq_lock);
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if (dev_priv->pc8.irqs_disabled) {
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WARN(1, "IRQs disabled\n");
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dev_priv->pc8.regsave.deimr |= mask;
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return;
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}
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if ((dev_priv->irq_mask & mask) != mask) {
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dev_priv->irq_mask |= mask;
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I915_WRITE(DEIMR, dev_priv->irq_mask);
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POSTING_READ(DEIMR);
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}
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}
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/**
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* ilk_update_gt_irq - update GTIMR
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* @dev_priv: driver private
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* @interrupt_mask: mask of interrupt bits to update
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* @enabled_irq_mask: mask of interrupt bits to enable
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*/
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static void ilk_update_gt_irq(struct drm_i915_private *dev_priv,
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uint32_t interrupt_mask,
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uint32_t enabled_irq_mask)
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{
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assert_spin_locked(&dev_priv->irq_lock);
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if (dev_priv->pc8.irqs_disabled) {
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WARN(1, "IRQs disabled\n");
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dev_priv->pc8.regsave.gtimr &= ~interrupt_mask;
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dev_priv->pc8.regsave.gtimr |= (~enabled_irq_mask &
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interrupt_mask);
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return;
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}
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dev_priv->gt_irq_mask &= ~interrupt_mask;
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dev_priv->gt_irq_mask |= (~enabled_irq_mask & interrupt_mask);
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I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
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POSTING_READ(GTIMR);
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}
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void ilk_enable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
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{
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ilk_update_gt_irq(dev_priv, mask, mask);
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}
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void ilk_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
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{
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ilk_update_gt_irq(dev_priv, mask, 0);
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}
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/**
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* snb_update_pm_irq - update GEN6_PMIMR
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* @dev_priv: driver private
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* @interrupt_mask: mask of interrupt bits to update
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* @enabled_irq_mask: mask of interrupt bits to enable
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*/
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static void snb_update_pm_irq(struct drm_i915_private *dev_priv,
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uint32_t interrupt_mask,
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uint32_t enabled_irq_mask)
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{
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uint32_t new_val;
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assert_spin_locked(&dev_priv->irq_lock);
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if (dev_priv->pc8.irqs_disabled) {
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WARN(1, "IRQs disabled\n");
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dev_priv->pc8.regsave.gen6_pmimr &= ~interrupt_mask;
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dev_priv->pc8.regsave.gen6_pmimr |= (~enabled_irq_mask &
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interrupt_mask);
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return;
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}
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new_val = dev_priv->pm_irq_mask;
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new_val &= ~interrupt_mask;
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new_val |= (~enabled_irq_mask & interrupt_mask);
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if (new_val != dev_priv->pm_irq_mask) {
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dev_priv->pm_irq_mask = new_val;
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I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask);
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POSTING_READ(GEN6_PMIMR);
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}
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}
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void snb_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
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{
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snb_update_pm_irq(dev_priv, mask, mask);
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}
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void snb_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
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{
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snb_update_pm_irq(dev_priv, mask, 0);
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}
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static bool ivb_can_enable_err_int(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct intel_crtc *crtc;
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enum pipe pipe;
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assert_spin_locked(&dev_priv->irq_lock);
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for_each_pipe(pipe) {
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crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
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if (crtc->cpu_fifo_underrun_disabled)
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return false;
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}
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return true;
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}
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static bool cpt_can_enable_serr_int(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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enum pipe pipe;
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struct intel_crtc *crtc;
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assert_spin_locked(&dev_priv->irq_lock);
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for_each_pipe(pipe) {
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crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
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if (crtc->pch_fifo_underrun_disabled)
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return false;
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}
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return true;
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}
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static void ironlake_set_fifo_underrun_reporting(struct drm_device *dev,
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enum pipe pipe, bool enable)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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uint32_t bit = (pipe == PIPE_A) ? DE_PIPEA_FIFO_UNDERRUN :
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DE_PIPEB_FIFO_UNDERRUN;
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if (enable)
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ironlake_enable_display_irq(dev_priv, bit);
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else
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ironlake_disable_display_irq(dev_priv, bit);
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}
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static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev,
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enum pipe pipe, bool enable)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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if (enable) {
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I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN(pipe));
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if (!ivb_can_enable_err_int(dev))
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return;
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ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
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} else {
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bool was_enabled = !(I915_READ(DEIMR) & DE_ERR_INT_IVB);
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/* Change the state _after_ we've read out the current one. */
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ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
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if (!was_enabled &&
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(I915_READ(GEN7_ERR_INT) & ERR_INT_FIFO_UNDERRUN(pipe))) {
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DRM_DEBUG_KMS("uncleared fifo underrun on pipe %c\n",
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pipe_name(pipe));
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}
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}
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}
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/**
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* ibx_display_interrupt_update - update SDEIMR
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* @dev_priv: driver private
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* @interrupt_mask: mask of interrupt bits to update
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* @enabled_irq_mask: mask of interrupt bits to enable
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*/
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static void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
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uint32_t interrupt_mask,
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uint32_t enabled_irq_mask)
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{
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uint32_t sdeimr = I915_READ(SDEIMR);
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sdeimr &= ~interrupt_mask;
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sdeimr |= (~enabled_irq_mask & interrupt_mask);
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assert_spin_locked(&dev_priv->irq_lock);
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if (dev_priv->pc8.irqs_disabled &&
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(interrupt_mask & SDE_HOTPLUG_MASK_CPT)) {
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WARN(1, "IRQs disabled\n");
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dev_priv->pc8.regsave.sdeimr &= ~interrupt_mask;
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dev_priv->pc8.regsave.sdeimr |= (~enabled_irq_mask &
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interrupt_mask);
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return;
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}
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I915_WRITE(SDEIMR, sdeimr);
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POSTING_READ(SDEIMR);
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}
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#define ibx_enable_display_interrupt(dev_priv, bits) \
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ibx_display_interrupt_update((dev_priv), (bits), (bits))
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#define ibx_disable_display_interrupt(dev_priv, bits) \
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ibx_display_interrupt_update((dev_priv), (bits), 0)
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static void ibx_set_fifo_underrun_reporting(struct drm_device *dev,
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enum transcoder pch_transcoder,
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bool enable)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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uint32_t bit = (pch_transcoder == TRANSCODER_A) ?
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SDE_TRANSA_FIFO_UNDER : SDE_TRANSB_FIFO_UNDER;
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if (enable)
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ibx_enable_display_interrupt(dev_priv, bit);
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else
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ibx_disable_display_interrupt(dev_priv, bit);
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}
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static void cpt_set_fifo_underrun_reporting(struct drm_device *dev,
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enum transcoder pch_transcoder,
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bool enable)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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if (enable) {
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I915_WRITE(SERR_INT,
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SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder));
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if (!cpt_can_enable_serr_int(dev))
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return;
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ibx_enable_display_interrupt(dev_priv, SDE_ERROR_CPT);
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} else {
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uint32_t tmp = I915_READ(SERR_INT);
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bool was_enabled = !(I915_READ(SDEIMR) & SDE_ERROR_CPT);
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/* Change the state _after_ we've read out the current one. */
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ibx_disable_display_interrupt(dev_priv, SDE_ERROR_CPT);
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if (!was_enabled &&
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(tmp & SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder))) {
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DRM_DEBUG_KMS("uncleared pch fifo underrun on pch transcoder %c\n",
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transcoder_name(pch_transcoder));
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}
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}
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}
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/**
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* intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages
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* @dev: drm device
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* @pipe: pipe
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* @enable: true if we want to report FIFO underrun errors, false otherwise
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*
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* This function makes us disable or enable CPU fifo underruns for a specific
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* pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun
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* reporting for one pipe may also disable all the other CPU error interruts for
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* the other pipes, due to the fact that there's just one interrupt mask/enable
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* bit for all the pipes.
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*
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* Returns the previous state of underrun reporting.
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*/
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bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
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enum pipe pipe, bool enable)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
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struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
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unsigned long flags;
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bool ret;
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spin_lock_irqsave(&dev_priv->irq_lock, flags);
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ret = !intel_crtc->cpu_fifo_underrun_disabled;
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if (enable == ret)
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goto done;
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intel_crtc->cpu_fifo_underrun_disabled = !enable;
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if (IS_GEN5(dev) || IS_GEN6(dev))
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ironlake_set_fifo_underrun_reporting(dev, pipe, enable);
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else if (IS_GEN7(dev))
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ivybridge_set_fifo_underrun_reporting(dev, pipe, enable);
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done:
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spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
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return ret;
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}
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/**
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* intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages
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* @dev: drm device
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* @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
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* @enable: true if we want to report FIFO underrun errors, false otherwise
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*
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* This function makes us disable or enable PCH fifo underruns for a specific
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* PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
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* underrun reporting for one transcoder may also disable all the other PCH
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* error interruts for the other transcoders, due to the fact that there's just
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* one interrupt mask/enable bit for all the transcoders.
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*
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* Returns the previous state of underrun reporting.
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*/
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bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev,
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enum transcoder pch_transcoder,
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bool enable)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pch_transcoder];
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struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
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unsigned long flags;
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bool ret;
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/*
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* NOTE: Pre-LPT has a fixed cpu pipe -> pch transcoder mapping, but LPT
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* has only one pch transcoder A that all pipes can use. To avoid racy
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* pch transcoder -> pipe lookups from interrupt code simply store the
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* underrun statistics in crtc A. Since we never expose this anywhere
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* nor use it outside of the fifo underrun code here using the "wrong"
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* crtc on LPT won't cause issues.
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*/
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spin_lock_irqsave(&dev_priv->irq_lock, flags);
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ret = !intel_crtc->pch_fifo_underrun_disabled;
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if (enable == ret)
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goto done;
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intel_crtc->pch_fifo_underrun_disabled = !enable;
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if (HAS_PCH_IBX(dev))
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ibx_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
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else
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cpt_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
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done:
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spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
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return ret;
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}
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|
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void
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i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
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{
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u32 reg = PIPESTAT(pipe);
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u32 pipestat = I915_READ(reg) & 0x7fff0000;
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assert_spin_locked(&dev_priv->irq_lock);
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if ((pipestat & mask) == mask)
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return;
|
|
|
|
/* Enable the interrupt, clear any pending status */
|
|
pipestat |= mask | (mask >> 16);
|
|
I915_WRITE(reg, pipestat);
|
|
POSTING_READ(reg);
|
|
}
|
|
|
|
void
|
|
i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
|
|
{
|
|
u32 reg = PIPESTAT(pipe);
|
|
u32 pipestat = I915_READ(reg) & 0x7fff0000;
|
|
|
|
assert_spin_locked(&dev_priv->irq_lock);
|
|
|
|
if ((pipestat & mask) == 0)
|
|
return;
|
|
|
|
pipestat &= ~mask;
|
|
I915_WRITE(reg, pipestat);
|
|
POSTING_READ(reg);
|
|
}
|
|
|
|
/**
|
|
* i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
|
|
*/
|
|
static void i915_enable_asle_pipestat(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
unsigned long irqflags;
|
|
|
|
if (!dev_priv->opregion.asle || !IS_MOBILE(dev))
|
|
return;
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
|
|
i915_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE);
|
|
if (INTEL_INFO(dev)->gen >= 4)
|
|
i915_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
|
|
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
}
|
|
|
|
/**
|
|
* i915_pipe_enabled - check if a pipe is enabled
|
|
* @dev: DRM device
|
|
* @pipe: pipe to check
|
|
*
|
|
* Reading certain registers when the pipe is disabled can hang the chip.
|
|
* Use this routine to make sure the PLL is running and the pipe is active
|
|
* before reading such registers if unsure.
|
|
*/
|
|
static int
|
|
i915_pipe_enabled(struct drm_device *dev, int pipe)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
|
|
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
|
|
/* Locking is horribly broken here, but whatever. */
|
|
struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
|
|
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
|
|
|
|
return intel_crtc->active;
|
|
} else {
|
|
return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
|
|
}
|
|
}
|
|
|
|
/* Called from drm generic code, passed a 'crtc', which
|
|
* we use as a pipe index
|
|
*/
|
|
static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
unsigned long high_frame;
|
|
unsigned long low_frame;
|
|
u32 high1, high2, low;
|
|
|
|
if (!i915_pipe_enabled(dev, pipe)) {
|
|
DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
|
|
"pipe %c\n", pipe_name(pipe));
|
|
return 0;
|
|
}
|
|
|
|
high_frame = PIPEFRAME(pipe);
|
|
low_frame = PIPEFRAMEPIXEL(pipe);
|
|
|
|
/*
|
|
* High & low register fields aren't synchronized, so make sure
|
|
* we get a low value that's stable across two reads of the high
|
|
* register.
|
|
*/
|
|
do {
|
|
high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
|
|
low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK;
|
|
high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
|
|
} while (high1 != high2);
|
|
|
|
high1 >>= PIPE_FRAME_HIGH_SHIFT;
|
|
low >>= PIPE_FRAME_LOW_SHIFT;
|
|
return (high1 << 8) | low;
|
|
}
|
|
|
|
static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
int reg = PIPE_FRMCOUNT_GM45(pipe);
|
|
|
|
if (!i915_pipe_enabled(dev, pipe)) {
|
|
DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
|
|
"pipe %c\n", pipe_name(pipe));
|
|
return 0;
|
|
}
|
|
|
|
return I915_READ(reg);
|
|
}
|
|
|
|
static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
|
|
int *vpos, int *hpos)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
u32 vbl = 0, position = 0;
|
|
int vbl_start, vbl_end, htotal, vtotal;
|
|
bool in_vbl = true;
|
|
int ret = 0;
|
|
enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
|
|
pipe);
|
|
|
|
if (!i915_pipe_enabled(dev, pipe)) {
|
|
DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
|
|
"pipe %c\n", pipe_name(pipe));
|
|
return 0;
|
|
}
|
|
|
|
/* Get vtotal. */
|
|
vtotal = 1 + ((I915_READ(VTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
|
|
|
|
if (INTEL_INFO(dev)->gen >= 4) {
|
|
/* No obvious pixelcount register. Only query vertical
|
|
* scanout position from Display scan line register.
|
|
*/
|
|
position = I915_READ(PIPEDSL(pipe));
|
|
|
|
/* Decode into vertical scanout position. Don't have
|
|
* horizontal scanout position.
|
|
*/
|
|
*vpos = position & 0x1fff;
|
|
*hpos = 0;
|
|
} else {
|
|
/* Have access to pixelcount since start of frame.
|
|
* We can split this into vertical and horizontal
|
|
* scanout position.
|
|
*/
|
|
position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
|
|
|
|
htotal = 1 + ((I915_READ(HTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
|
|
*vpos = position / htotal;
|
|
*hpos = position - (*vpos * htotal);
|
|
}
|
|
|
|
/* Query vblank area. */
|
|
vbl = I915_READ(VBLANK(cpu_transcoder));
|
|
|
|
/* Test position against vblank region. */
|
|
vbl_start = vbl & 0x1fff;
|
|
vbl_end = (vbl >> 16) & 0x1fff;
|
|
|
|
if ((*vpos < vbl_start) || (*vpos > vbl_end))
|
|
in_vbl = false;
|
|
|
|
/* Inside "upper part" of vblank area? Apply corrective offset: */
|
|
if (in_vbl && (*vpos >= vbl_start))
|
|
*vpos = *vpos - vtotal;
|
|
|
|
/* Readouts valid? */
|
|
if (vbl > 0)
|
|
ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
|
|
|
|
/* In vblank? */
|
|
if (in_vbl)
|
|
ret |= DRM_SCANOUTPOS_INVBL;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
|
|
int *max_error,
|
|
struct timeval *vblank_time,
|
|
unsigned flags)
|
|
{
|
|
struct drm_crtc *crtc;
|
|
|
|
if (pipe < 0 || pipe >= INTEL_INFO(dev)->num_pipes) {
|
|
DRM_ERROR("Invalid crtc %d\n", pipe);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Get drm_crtc to timestamp: */
|
|
crtc = intel_get_crtc_for_pipe(dev, pipe);
|
|
if (crtc == NULL) {
|
|
DRM_ERROR("Invalid crtc %d\n", pipe);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!crtc->enabled) {
|
|
DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* Helper routine in DRM core does all the work: */
|
|
return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
|
|
vblank_time, flags,
|
|
crtc);
|
|
}
|
|
|
|
static int intel_hpd_irq_event(struct drm_device *dev, struct drm_connector *connector)
|
|
{
|
|
enum drm_connector_status old_status;
|
|
|
|
WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
|
|
old_status = connector->status;
|
|
|
|
connector->status = connector->funcs->detect(connector, false);
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
|
|
connector->base.id,
|
|
drm_get_connector_name(connector),
|
|
old_status, connector->status);
|
|
return (old_status != connector->status);
|
|
}
|
|
|
|
/*
|
|
* Handle hotplug events outside the interrupt handler proper.
|
|
*/
|
|
#define I915_REENABLE_HOTPLUG_DELAY (2*60*1000)
|
|
|
|
static void i915_hotplug_work_func(struct work_struct *work)
|
|
{
|
|
drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
|
|
hotplug_work);
|
|
struct drm_device *dev = dev_priv->dev;
|
|
struct drm_mode_config *mode_config = &dev->mode_config;
|
|
struct intel_connector *intel_connector;
|
|
struct intel_encoder *intel_encoder;
|
|
struct drm_connector *connector;
|
|
unsigned long irqflags;
|
|
bool hpd_disabled = false;
|
|
bool changed = false;
|
|
u32 hpd_event_bits;
|
|
|
|
/* HPD irq before everything is fully set up. */
|
|
if (!dev_priv->enable_hotplug_processing)
|
|
return;
|
|
|
|
mutex_lock(&mode_config->mutex);
|
|
DRM_DEBUG_KMS("running encoder hotplug functions\n");
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
|
|
hpd_event_bits = dev_priv->hpd_event_bits;
|
|
dev_priv->hpd_event_bits = 0;
|
|
list_for_each_entry(connector, &mode_config->connector_list, head) {
|
|
intel_connector = to_intel_connector(connector);
|
|
intel_encoder = intel_connector->encoder;
|
|
if (intel_encoder->hpd_pin > HPD_NONE &&
|
|
dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED &&
|
|
connector->polled == DRM_CONNECTOR_POLL_HPD) {
|
|
DRM_INFO("HPD interrupt storm detected on connector %s: "
|
|
"switching from hotplug detection to polling\n",
|
|
drm_get_connector_name(connector));
|
|
dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED;
|
|
connector->polled = DRM_CONNECTOR_POLL_CONNECT
|
|
| DRM_CONNECTOR_POLL_DISCONNECT;
|
|
hpd_disabled = true;
|
|
}
|
|
if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
|
|
DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
|
|
drm_get_connector_name(connector), intel_encoder->hpd_pin);
|
|
}
|
|
}
|
|
/* if there were no outputs to poll, poll was disabled,
|
|
* therefore make sure it's enabled when disabling HPD on
|
|
* some connectors */
|
|
if (hpd_disabled) {
|
|
drm_kms_helper_poll_enable(dev);
|
|
mod_timer(&dev_priv->hotplug_reenable_timer,
|
|
GetTimerTicks() + msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY));
|
|
}
|
|
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
|
|
list_for_each_entry(connector, &mode_config->connector_list, head) {
|
|
intel_connector = to_intel_connector(connector);
|
|
intel_encoder = intel_connector->encoder;
|
|
if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
|
|
if (intel_encoder->hot_plug)
|
|
intel_encoder->hot_plug(intel_encoder);
|
|
if (intel_hpd_irq_event(dev, connector))
|
|
changed = true;
|
|
}
|
|
}
|
|
mutex_unlock(&mode_config->mutex);
|
|
|
|
if (changed)
|
|
drm_kms_helper_hotplug_event(dev);
|
|
}
|
|
|
|
static void ironlake_rps_change_irq_handler(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
u32 busy_up, busy_down, max_avg, min_avg;
|
|
u8 new_delay;
|
|
|
|
spin_lock(&mchdev_lock);
|
|
|
|
I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
|
|
|
|
new_delay = dev_priv->ips.cur_delay;
|
|
|
|
I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
|
|
busy_up = I915_READ(RCPREVBSYTUPAVG);
|
|
busy_down = I915_READ(RCPREVBSYTDNAVG);
|
|
max_avg = I915_READ(RCBMAXAVG);
|
|
min_avg = I915_READ(RCBMINAVG);
|
|
|
|
/* Handle RCS change request from hw */
|
|
if (busy_up > max_avg) {
|
|
if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
|
|
new_delay = dev_priv->ips.cur_delay - 1;
|
|
if (new_delay < dev_priv->ips.max_delay)
|
|
new_delay = dev_priv->ips.max_delay;
|
|
} else if (busy_down < min_avg) {
|
|
if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
|
|
new_delay = dev_priv->ips.cur_delay + 1;
|
|
if (new_delay > dev_priv->ips.min_delay)
|
|
new_delay = dev_priv->ips.min_delay;
|
|
}
|
|
|
|
if (ironlake_set_drps(dev, new_delay))
|
|
dev_priv->ips.cur_delay = new_delay;
|
|
|
|
spin_unlock(&mchdev_lock);
|
|
|
|
return;
|
|
}
|
|
|
|
static void notify_ring(struct drm_device *dev,
|
|
struct intel_ring_buffer *ring)
|
|
{
|
|
if (ring->obj == NULL)
|
|
return;
|
|
|
|
trace_i915_gem_request_complete(ring, ring->get_seqno(ring, false));
|
|
|
|
wake_up_all(&ring->irq_queue);
|
|
}
|
|
|
|
static void gen6_pm_rps_work(struct work_struct *work)
|
|
{
|
|
drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
|
|
rps.work);
|
|
u32 pm_iir;
|
|
u8 new_delay;
|
|
|
|
spin_lock_irq(&dev_priv->irq_lock);
|
|
pm_iir = dev_priv->rps.pm_iir;
|
|
dev_priv->rps.pm_iir = 0;
|
|
/* Make sure not to corrupt PMIMR state used by ringbuffer code */
|
|
snb_enable_pm_irq(dev_priv, GEN6_PM_RPS_EVENTS);
|
|
spin_unlock_irq(&dev_priv->irq_lock);
|
|
|
|
/* Make sure we didn't queue anything we're not going to process. */
|
|
WARN_ON(pm_iir & ~GEN6_PM_RPS_EVENTS);
|
|
|
|
if ((pm_iir & GEN6_PM_RPS_EVENTS) == 0)
|
|
return;
|
|
|
|
mutex_lock(&dev_priv->rps.hw_lock);
|
|
|
|
if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
|
|
new_delay = dev_priv->rps.cur_delay + 1;
|
|
|
|
/*
|
|
* For better performance, jump directly
|
|
* to RPe if we're below it.
|
|
*/
|
|
if (IS_VALLEYVIEW(dev_priv->dev) &&
|
|
dev_priv->rps.cur_delay < dev_priv->rps.rpe_delay)
|
|
new_delay = dev_priv->rps.rpe_delay;
|
|
} else
|
|
new_delay = dev_priv->rps.cur_delay - 1;
|
|
|
|
/* sysfs frequency interfaces may have snuck in while servicing the
|
|
* interrupt
|
|
*/
|
|
if (new_delay >= dev_priv->rps.min_delay &&
|
|
new_delay <= dev_priv->rps.max_delay) {
|
|
if (IS_VALLEYVIEW(dev_priv->dev))
|
|
valleyview_set_rps(dev_priv->dev, new_delay);
|
|
else
|
|
gen6_set_rps(dev_priv->dev, new_delay);
|
|
}
|
|
|
|
if (IS_VALLEYVIEW(dev_priv->dev)) {
|
|
/*
|
|
* On VLV, when we enter RC6 we may not be at the minimum
|
|
* voltage level, so arm a timer to check. It should only
|
|
* fire when there's activity or once after we've entered
|
|
* RC6, and then won't be re-armed until the next RPS interrupt.
|
|
*/
|
|
// mod_delayed_work(dev_priv->wq, &dev_priv->rps.vlv_work,
|
|
// msecs_to_jiffies(100));
|
|
}
|
|
|
|
mutex_unlock(&dev_priv->rps.hw_lock);
|
|
}
|
|
|
|
|
|
/**
|
|
* ivybridge_parity_work - Workqueue called when a parity error interrupt
|
|
* occurred.
|
|
* @work: workqueue struct
|
|
*
|
|
* Doesn't actually do anything except notify userspace. As a consequence of
|
|
* this event, userspace should try to remap the bad rows since statistically
|
|
* it is likely the same row is more likely to go bad again.
|
|
*/
|
|
static void ivybridge_parity_work(struct work_struct *work)
|
|
{
|
|
drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
|
|
l3_parity.error_work);
|
|
u32 error_status, row, bank, subbank;
|
|
char *parity_event[5];
|
|
uint32_t misccpctl;
|
|
unsigned long flags;
|
|
|
|
/* We must turn off DOP level clock gating to access the L3 registers.
|
|
* In order to prevent a get/put style interface, acquire struct mutex
|
|
* any time we access those registers.
|
|
*/
|
|
mutex_lock(&dev_priv->dev->struct_mutex);
|
|
|
|
misccpctl = I915_READ(GEN7_MISCCPCTL);
|
|
I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
|
|
POSTING_READ(GEN7_MISCCPCTL);
|
|
|
|
error_status = I915_READ(GEN7_L3CDERRST1);
|
|
row = GEN7_PARITY_ERROR_ROW(error_status);
|
|
bank = GEN7_PARITY_ERROR_BANK(error_status);
|
|
subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
|
|
|
|
I915_WRITE(GEN7_L3CDERRST1, GEN7_PARITY_ERROR_VALID |
|
|
GEN7_L3CDERRST1_ENABLE);
|
|
POSTING_READ(GEN7_L3CDERRST1);
|
|
|
|
I915_WRITE(GEN7_MISCCPCTL, misccpctl);
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, flags);
|
|
ilk_enable_gt_irq(dev_priv, GT_RENDER_L3_PARITY_ERROR_INTERRUPT);
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
|
|
|
|
mutex_unlock(&dev_priv->dev->struct_mutex);
|
|
|
|
DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n",
|
|
row, bank, subbank);
|
|
|
|
}
|
|
|
|
static void ivybridge_parity_error_irq_handler(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
|
|
if (!HAS_L3_GPU_CACHE(dev))
|
|
return;
|
|
|
|
spin_lock(&dev_priv->irq_lock);
|
|
ilk_disable_gt_irq(dev_priv, GT_RENDER_L3_PARITY_ERROR_INTERRUPT);
|
|
spin_unlock(&dev_priv->irq_lock);
|
|
|
|
queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
|
|
}
|
|
|
|
static void ilk_gt_irq_handler(struct drm_device *dev,
|
|
struct drm_i915_private *dev_priv,
|
|
u32 gt_iir)
|
|
{
|
|
if (gt_iir &
|
|
(GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
|
|
notify_ring(dev, &dev_priv->ring[RCS]);
|
|
if (gt_iir & ILK_BSD_USER_INTERRUPT)
|
|
notify_ring(dev, &dev_priv->ring[VCS]);
|
|
}
|
|
|
|
static void snb_gt_irq_handler(struct drm_device *dev,
|
|
struct drm_i915_private *dev_priv,
|
|
u32 gt_iir)
|
|
{
|
|
|
|
if (gt_iir &
|
|
(GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
|
|
notify_ring(dev, &dev_priv->ring[RCS]);
|
|
if (gt_iir & GT_BSD_USER_INTERRUPT)
|
|
notify_ring(dev, &dev_priv->ring[VCS]);
|
|
if (gt_iir & GT_BLT_USER_INTERRUPT)
|
|
notify_ring(dev, &dev_priv->ring[BCS]);
|
|
|
|
if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
|
|
GT_BSD_CS_ERROR_INTERRUPT |
|
|
GT_RENDER_CS_MASTER_ERROR_INTERRUPT)) {
|
|
DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
|
|
i915_handle_error(dev, false);
|
|
}
|
|
|
|
if (gt_iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
|
|
ivybridge_parity_error_irq_handler(dev);
|
|
}
|
|
|
|
#define HPD_STORM_DETECT_PERIOD 1000
|
|
#define HPD_STORM_THRESHOLD 5
|
|
|
|
static inline void intel_hpd_irq_handler(struct drm_device *dev,
|
|
u32 hotplug_trigger,
|
|
const u32 *hpd)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
int i;
|
|
bool storm_detected = false;
|
|
|
|
if (!hotplug_trigger)
|
|
return;
|
|
|
|
spin_lock(&dev_priv->irq_lock);
|
|
for (i = 1; i < HPD_NUM_PINS; i++) {
|
|
|
|
WARN(((hpd[i] & hotplug_trigger) &&
|
|
dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED),
|
|
"Received HPD interrupt although disabled\n");
|
|
|
|
if (!(hpd[i] & hotplug_trigger) ||
|
|
dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)
|
|
continue;
|
|
|
|
dev_priv->hpd_event_bits |= (1 << i);
|
|
if (!time_in_range(GetTimerTicks(), dev_priv->hpd_stats[i].hpd_last_jiffies,
|
|
dev_priv->hpd_stats[i].hpd_last_jiffies
|
|
+ msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) {
|
|
dev_priv->hpd_stats[i].hpd_last_jiffies = GetTimerTicks();
|
|
dev_priv->hpd_stats[i].hpd_cnt = 0;
|
|
DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: 0\n", i);
|
|
} else if (dev_priv->hpd_stats[i].hpd_cnt > HPD_STORM_THRESHOLD) {
|
|
dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
|
|
dev_priv->hpd_event_bits &= ~(1 << i);
|
|
DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i);
|
|
storm_detected = true;
|
|
} else {
|
|
dev_priv->hpd_stats[i].hpd_cnt++;
|
|
DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: %d\n", i,
|
|
dev_priv->hpd_stats[i].hpd_cnt);
|
|
}
|
|
}
|
|
|
|
if (storm_detected)
|
|
dev_priv->display.hpd_irq_setup(dev);
|
|
spin_unlock(&dev_priv->irq_lock);
|
|
|
|
/*
|
|
* Our hotplug handler can grab modeset locks (by calling down into the
|
|
* fb helpers). Hence it must not be run on our own dev-priv->wq work
|
|
* queue for otherwise the flush_work in the pageflip code will
|
|
* deadlock.
|
|
*/
|
|
schedule_work(&dev_priv->hotplug_work);
|
|
}
|
|
|
|
static void gmbus_irq_handler(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
|
|
wake_up_all(&dev_priv->gmbus_wait_queue);
|
|
}
|
|
|
|
static void dp_aux_irq_handler(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
|
|
wake_up_all(&dev_priv->gmbus_wait_queue);
|
|
}
|
|
|
|
/* The RPS events need forcewake, so we add them to a work queue and mask their
|
|
* IMR bits until the work is done. Other interrupts can be processed without
|
|
* the work queue. */
|
|
static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
|
|
{
|
|
if (pm_iir & GEN6_PM_RPS_EVENTS) {
|
|
spin_lock(&dev_priv->irq_lock);
|
|
dev_priv->rps.pm_iir |= pm_iir & GEN6_PM_RPS_EVENTS;
|
|
snb_disable_pm_irq(dev_priv, pm_iir & GEN6_PM_RPS_EVENTS);
|
|
spin_unlock(&dev_priv->irq_lock);
|
|
|
|
queue_work(dev_priv->wq, &dev_priv->rps.work);
|
|
}
|
|
|
|
if (HAS_VEBOX(dev_priv->dev)) {
|
|
if (pm_iir & PM_VEBOX_USER_INTERRUPT)
|
|
notify_ring(dev_priv->dev, &dev_priv->ring[VECS]);
|
|
|
|
if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT) {
|
|
DRM_ERROR("VEBOX CS error interrupt 0x%08x\n", pm_iir);
|
|
i915_handle_error(dev_priv->dev, false);
|
|
}
|
|
}
|
|
}
|
|
|
|
static irqreturn_t valleyview_irq_handler(int irq, void *arg)
|
|
{
|
|
struct drm_device *dev = (struct drm_device *) arg;
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
u32 iir, gt_iir, pm_iir;
|
|
irqreturn_t ret = IRQ_NONE;
|
|
unsigned long irqflags;
|
|
int pipe;
|
|
u32 pipe_stats[I915_MAX_PIPES];
|
|
|
|
atomic_inc(&dev_priv->irq_received);
|
|
|
|
while (true) {
|
|
iir = I915_READ(VLV_IIR);
|
|
gt_iir = I915_READ(GTIIR);
|
|
pm_iir = I915_READ(GEN6_PMIIR);
|
|
|
|
if (gt_iir == 0 && pm_iir == 0 && iir == 0)
|
|
goto out;
|
|
|
|
ret = IRQ_HANDLED;
|
|
|
|
snb_gt_irq_handler(dev, dev_priv, gt_iir);
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
for_each_pipe(pipe) {
|
|
int reg = PIPESTAT(pipe);
|
|
pipe_stats[pipe] = I915_READ(reg);
|
|
|
|
/*
|
|
* Clear the PIPE*STAT regs before the IIR
|
|
*/
|
|
if (pipe_stats[pipe] & 0x8000ffff) {
|
|
if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
|
|
DRM_DEBUG_DRIVER("pipe %c underrun\n",
|
|
pipe_name(pipe));
|
|
I915_WRITE(reg, pipe_stats[pipe]);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
|
|
#if 0
|
|
for_each_pipe(pipe) {
|
|
if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
|
|
drm_handle_vblank(dev, pipe);
|
|
|
|
if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) {
|
|
intel_prepare_page_flip(dev, pipe);
|
|
intel_finish_page_flip(dev, pipe);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Consume port. Then clear IIR or we'll miss events */
|
|
if (iir & I915_DISPLAY_PORT_INTERRUPT) {
|
|
u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
|
|
u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
|
|
|
|
DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
|
|
hotplug_status);
|
|
|
|
intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
|
|
|
|
I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
|
|
I915_READ(PORT_HOTPLUG_STAT);
|
|
}
|
|
|
|
if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
|
|
gmbus_irq_handler(dev);
|
|
|
|
if (pm_iir)
|
|
gen6_rps_irq_handler(dev_priv, pm_iir);
|
|
|
|
I915_WRITE(GTIIR, gt_iir);
|
|
I915_WRITE(GEN6_PMIIR, pm_iir);
|
|
I915_WRITE(VLV_IIR, iir);
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
int pipe;
|
|
u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
|
|
|
|
intel_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx);
|
|
|
|
if (pch_iir & SDE_AUDIO_POWER_MASK) {
|
|
int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
|
|
SDE_AUDIO_POWER_SHIFT);
|
|
DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
|
|
port_name(port));
|
|
}
|
|
|
|
if (pch_iir & SDE_AUX_MASK)
|
|
dp_aux_irq_handler(dev);
|
|
|
|
if (pch_iir & SDE_GMBUS)
|
|
gmbus_irq_handler(dev);
|
|
|
|
if (pch_iir & SDE_AUDIO_HDCP_MASK)
|
|
DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
|
|
|
|
if (pch_iir & SDE_AUDIO_TRANS_MASK)
|
|
DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
|
|
|
|
if (pch_iir & SDE_POISON)
|
|
DRM_ERROR("PCH poison interrupt\n");
|
|
|
|
if (pch_iir & SDE_FDI_MASK)
|
|
for_each_pipe(pipe)
|
|
DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
|
|
pipe_name(pipe),
|
|
I915_READ(FDI_RX_IIR(pipe)));
|
|
|
|
if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
|
|
DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
|
|
|
|
if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
|
|
DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
|
|
|
|
if (pch_iir & SDE_TRANSA_FIFO_UNDER)
|
|
if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
|
|
false))
|
|
DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
|
|
|
|
if (pch_iir & SDE_TRANSB_FIFO_UNDER)
|
|
if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
|
|
false))
|
|
DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
|
|
}
|
|
|
|
static void ivb_err_int_handler(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 err_int = I915_READ(GEN7_ERR_INT);
|
|
|
|
if (err_int & ERR_INT_POISON)
|
|
DRM_ERROR("Poison interrupt\n");
|
|
|
|
if (err_int & ERR_INT_FIFO_UNDERRUN_A)
|
|
if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
|
|
DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
|
|
|
|
if (err_int & ERR_INT_FIFO_UNDERRUN_B)
|
|
if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
|
|
DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
|
|
|
|
if (err_int & ERR_INT_FIFO_UNDERRUN_C)
|
|
if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_C, false))
|
|
DRM_DEBUG_DRIVER("Pipe C FIFO underrun\n");
|
|
|
|
I915_WRITE(GEN7_ERR_INT, err_int);
|
|
}
|
|
|
|
static void cpt_serr_int_handler(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 serr_int = I915_READ(SERR_INT);
|
|
|
|
if (serr_int & SERR_INT_POISON)
|
|
DRM_ERROR("PCH poison interrupt\n");
|
|
|
|
if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
|
|
if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
|
|
false))
|
|
DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
|
|
|
|
if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
|
|
if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
|
|
false))
|
|
DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
|
|
|
|
if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
|
|
if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_C,
|
|
false))
|
|
DRM_DEBUG_DRIVER("PCH transcoder C FIFO underrun\n");
|
|
|
|
I915_WRITE(SERR_INT, serr_int);
|
|
}
|
|
|
|
static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
int pipe;
|
|
u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
|
|
|
|
intel_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt);
|
|
|
|
if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
|
|
int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
|
|
SDE_AUDIO_POWER_SHIFT_CPT);
|
|
DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
|
|
port_name(port));
|
|
}
|
|
|
|
if (pch_iir & SDE_AUX_MASK_CPT)
|
|
dp_aux_irq_handler(dev);
|
|
|
|
if (pch_iir & SDE_GMBUS_CPT)
|
|
gmbus_irq_handler(dev);
|
|
|
|
if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
|
|
DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
|
|
|
|
if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
|
|
DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
|
|
|
|
if (pch_iir & SDE_FDI_MASK_CPT)
|
|
for_each_pipe(pipe)
|
|
DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
|
|
pipe_name(pipe),
|
|
I915_READ(FDI_RX_IIR(pipe)));
|
|
|
|
if (pch_iir & SDE_ERROR_CPT)
|
|
cpt_serr_int_handler(dev);
|
|
}
|
|
|
|
static void ilk_display_irq_handler(struct drm_device *dev, u32 de_iir)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
if (de_iir & DE_AUX_CHANNEL_A)
|
|
dp_aux_irq_handler(dev);
|
|
|
|
if (de_iir & DE_GSE)
|
|
intel_opregion_asle_intr(dev);
|
|
|
|
#if 0
|
|
if (de_iir & DE_PIPEA_VBLANK)
|
|
drm_handle_vblank(dev, 0);
|
|
|
|
if (de_iir & DE_PIPEB_VBLANK)
|
|
drm_handle_vblank(dev, 1);
|
|
#endif
|
|
|
|
if (de_iir & DE_POISON)
|
|
DRM_ERROR("Poison interrupt\n");
|
|
|
|
if (de_iir & DE_PIPEA_FIFO_UNDERRUN)
|
|
if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
|
|
DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
|
|
|
|
if (de_iir & DE_PIPEB_FIFO_UNDERRUN)
|
|
if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
|
|
DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
|
|
#if 0
|
|
if (de_iir & DE_PLANEA_FLIP_DONE) {
|
|
intel_prepare_page_flip(dev, 0);
|
|
intel_finish_page_flip_plane(dev, 0);
|
|
}
|
|
|
|
if (de_iir & DE_PLANEB_FLIP_DONE) {
|
|
intel_prepare_page_flip(dev, 1);
|
|
intel_finish_page_flip_plane(dev, 1);
|
|
}
|
|
#endif
|
|
|
|
/* check event from PCH */
|
|
if (de_iir & DE_PCH_EVENT) {
|
|
u32 pch_iir = I915_READ(SDEIIR);
|
|
|
|
if (HAS_PCH_CPT(dev))
|
|
cpt_irq_handler(dev, pch_iir);
|
|
else
|
|
ibx_irq_handler(dev, pch_iir);
|
|
|
|
/* should clear PCH hotplug event before clear CPU irq */
|
|
I915_WRITE(SDEIIR, pch_iir);
|
|
}
|
|
|
|
if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
|
|
ironlake_rps_change_irq_handler(dev);
|
|
}
|
|
|
|
static void ivb_display_irq_handler(struct drm_device *dev, u32 de_iir)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
int i;
|
|
|
|
if (de_iir & DE_ERR_INT_IVB)
|
|
ivb_err_int_handler(dev);
|
|
|
|
if (de_iir & DE_AUX_CHANNEL_A_IVB)
|
|
dp_aux_irq_handler(dev);
|
|
|
|
if (de_iir & DE_GSE_IVB)
|
|
intel_opregion_asle_intr(dev);
|
|
#if 0
|
|
for (i = 0; i < 3; i++) {
|
|
if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
|
|
drm_handle_vblank(dev, i);
|
|
if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
|
|
intel_prepare_page_flip(dev, i);
|
|
intel_finish_page_flip_plane(dev, i);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* check event from PCH */
|
|
if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) {
|
|
u32 pch_iir = I915_READ(SDEIIR);
|
|
|
|
cpt_irq_handler(dev, pch_iir);
|
|
|
|
/* clear PCH hotplug event before clear CPU irq */
|
|
I915_WRITE(SDEIIR, pch_iir);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t ironlake_irq_handler(int irq, void *arg)
|
|
{
|
|
struct drm_device *dev = (struct drm_device *) arg;
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
u32 de_iir, gt_iir, de_ier, sde_ier = 0;
|
|
irqreturn_t ret = IRQ_NONE;
|
|
bool err_int_reenable = false;
|
|
|
|
atomic_inc(&dev_priv->irq_received);
|
|
|
|
/* We get interrupts on unclaimed registers, so check for this before we
|
|
* do any I915_{READ,WRITE}. */
|
|
intel_uncore_check_errors(dev);
|
|
|
|
/* disable master interrupt before clearing iir */
|
|
de_ier = I915_READ(DEIER);
|
|
I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
|
|
POSTING_READ(DEIER);
|
|
|
|
/* Disable south interrupts. We'll only write to SDEIIR once, so further
|
|
* interrupts will will be stored on its back queue, and then we'll be
|
|
* able to process them after we restore SDEIER (as soon as we restore
|
|
* it, we'll get an interrupt if SDEIIR still has something to process
|
|
* due to its back queue). */
|
|
if (!HAS_PCH_NOP(dev)) {
|
|
sde_ier = I915_READ(SDEIER);
|
|
I915_WRITE(SDEIER, 0);
|
|
POSTING_READ(SDEIER);
|
|
}
|
|
|
|
/* On Haswell, also mask ERR_INT because we don't want to risk
|
|
* generating "unclaimed register" interrupts from inside the interrupt
|
|
* handler. */
|
|
if (IS_HASWELL(dev)) {
|
|
spin_lock(&dev_priv->irq_lock);
|
|
err_int_reenable = ~dev_priv->irq_mask & DE_ERR_INT_IVB;
|
|
if (err_int_reenable)
|
|
ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
|
|
spin_unlock(&dev_priv->irq_lock);
|
|
}
|
|
|
|
gt_iir = I915_READ(GTIIR);
|
|
if (gt_iir) {
|
|
if (INTEL_INFO(dev)->gen >= 6)
|
|
snb_gt_irq_handler(dev, dev_priv, gt_iir);
|
|
else
|
|
ilk_gt_irq_handler(dev, dev_priv, gt_iir);
|
|
I915_WRITE(GTIIR, gt_iir);
|
|
ret = IRQ_HANDLED;
|
|
}
|
|
|
|
de_iir = I915_READ(DEIIR);
|
|
if (de_iir) {
|
|
if (INTEL_INFO(dev)->gen >= 7)
|
|
ivb_display_irq_handler(dev, de_iir);
|
|
else
|
|
ilk_display_irq_handler(dev, de_iir);
|
|
I915_WRITE(DEIIR, de_iir);
|
|
ret = IRQ_HANDLED;
|
|
}
|
|
|
|
if (INTEL_INFO(dev)->gen >= 6) {
|
|
u32 pm_iir = I915_READ(GEN6_PMIIR);
|
|
if (pm_iir) {
|
|
gen6_rps_irq_handler(dev_priv, pm_iir);
|
|
I915_WRITE(GEN6_PMIIR, pm_iir);
|
|
ret = IRQ_HANDLED;
|
|
}
|
|
}
|
|
|
|
if (err_int_reenable) {
|
|
spin_lock(&dev_priv->irq_lock);
|
|
if (ivb_can_enable_err_int(dev))
|
|
ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
|
|
spin_unlock(&dev_priv->irq_lock);
|
|
}
|
|
|
|
I915_WRITE(DEIER, de_ier);
|
|
POSTING_READ(DEIER);
|
|
if (!HAS_PCH_NOP(dev)) {
|
|
I915_WRITE(SDEIER, sde_ier);
|
|
POSTING_READ(SDEIER);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void i915_error_wake_up(struct drm_i915_private *dev_priv,
|
|
bool reset_completed)
|
|
{
|
|
struct intel_ring_buffer *ring;
|
|
int i;
|
|
|
|
/*
|
|
* Notify all waiters for GPU completion events that reset state has
|
|
* been changed, and that they need to restart their wait after
|
|
* checking for potential errors (and bail out to drop locks if there is
|
|
* a gpu reset pending so that i915_error_work_func can acquire them).
|
|
*/
|
|
|
|
/* Wake up __wait_seqno, potentially holding dev->struct_mutex. */
|
|
for_each_ring(ring, dev_priv, i)
|
|
wake_up_all(&ring->irq_queue);
|
|
|
|
|
|
/*
|
|
* Signal tasks blocked in i915_gem_wait_for_error that the pending
|
|
* reset state is cleared.
|
|
*/
|
|
if (reset_completed)
|
|
wake_up_all(&dev_priv->gpu_error.reset_queue);
|
|
}
|
|
|
|
/**
|
|
* i915_error_work_func - do process context error handling work
|
|
* @work: work struct
|
|
*
|
|
* Fire an error uevent so userspace can see that a hang or error
|
|
* was detected.
|
|
*/
|
|
static void i915_error_work_func(struct work_struct *work)
|
|
{
|
|
struct i915_gpu_error *error = container_of(work, struct i915_gpu_error,
|
|
work);
|
|
drm_i915_private_t *dev_priv = container_of(error, drm_i915_private_t,
|
|
gpu_error);
|
|
struct drm_device *dev = dev_priv->dev;
|
|
char *error_event[] = { I915_ERROR_UEVENT "=1", NULL };
|
|
char *reset_event[] = { I915_RESET_UEVENT "=1", NULL };
|
|
char *reset_done_event[] = { I915_ERROR_UEVENT "=0", NULL };
|
|
int ret;
|
|
|
|
/*
|
|
* Note that there's only one work item which does gpu resets, so we
|
|
* need not worry about concurrent gpu resets potentially incrementing
|
|
* error->reset_counter twice. We only need to take care of another
|
|
* racing irq/hangcheck declaring the gpu dead for a second time. A
|
|
* quick check for that is good enough: schedule_work ensures the
|
|
* correct ordering between hang detection and this work item, and since
|
|
* the reset in-progress bit is only ever set by code outside of this
|
|
* work we don't need to worry about any other races.
|
|
*/
|
|
if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) {
|
|
DRM_DEBUG_DRIVER("resetting chip\n");
|
|
|
|
/*
|
|
* All state reset _must_ be completed before we update the
|
|
* reset counter, for otherwise waiters might miss the reset
|
|
* pending state and not properly drop locks, resulting in
|
|
* deadlocks with the reset work.
|
|
*/
|
|
// ret = i915_reset(dev);
|
|
|
|
// intel_display_handle_reset(dev);
|
|
|
|
if (ret == 0) {
|
|
/*
|
|
* After all the gem state is reset, increment the reset
|
|
* counter and wake up everyone waiting for the reset to
|
|
* complete.
|
|
*
|
|
* Since unlock operations are a one-sided barrier only,
|
|
* we need to insert a barrier here to order any seqno
|
|
* updates before
|
|
* the counter increment.
|
|
*/
|
|
atomic_inc(&dev_priv->gpu_error.reset_counter);
|
|
|
|
} else {
|
|
atomic_set(&error->reset_counter, I915_WEDGED);
|
|
}
|
|
|
|
/*
|
|
* Note: The wake_up also serves as a memory barrier so that
|
|
* waiters see the update value of the reset counter atomic_t.
|
|
*/
|
|
i915_error_wake_up(dev_priv, true);
|
|
}
|
|
}
|
|
|
|
static void i915_report_and_clear_eir(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint32_t instdone[I915_NUM_INSTDONE_REG];
|
|
u32 eir = I915_READ(EIR);
|
|
int pipe, i;
|
|
|
|
if (!eir)
|
|
return;
|
|
|
|
pr_err("render error detected, EIR: 0x%08x\n", eir);
|
|
|
|
i915_get_extra_instdone(dev, instdone);
|
|
|
|
if (IS_G4X(dev)) {
|
|
if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
|
|
u32 ipeir = I915_READ(IPEIR_I965);
|
|
|
|
pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
|
|
pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
|
|
for (i = 0; i < ARRAY_SIZE(instdone); i++)
|
|
pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
|
|
pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
|
|
pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
|
|
I915_WRITE(IPEIR_I965, ipeir);
|
|
POSTING_READ(IPEIR_I965);
|
|
}
|
|
if (eir & GM45_ERROR_PAGE_TABLE) {
|
|
u32 pgtbl_err = I915_READ(PGTBL_ER);
|
|
pr_err("page table error\n");
|
|
pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
|
|
I915_WRITE(PGTBL_ER, pgtbl_err);
|
|
POSTING_READ(PGTBL_ER);
|
|
}
|
|
}
|
|
|
|
if (!IS_GEN2(dev)) {
|
|
if (eir & I915_ERROR_PAGE_TABLE) {
|
|
u32 pgtbl_err = I915_READ(PGTBL_ER);
|
|
pr_err("page table error\n");
|
|
pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
|
|
I915_WRITE(PGTBL_ER, pgtbl_err);
|
|
POSTING_READ(PGTBL_ER);
|
|
}
|
|
}
|
|
|
|
if (eir & I915_ERROR_MEMORY_REFRESH) {
|
|
pr_err("memory refresh error:\n");
|
|
for_each_pipe(pipe)
|
|
pr_err("pipe %c stat: 0x%08x\n",
|
|
pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
|
|
/* pipestat has already been acked */
|
|
}
|
|
if (eir & I915_ERROR_INSTRUCTION) {
|
|
pr_err("instruction error\n");
|
|
pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
|
|
for (i = 0; i < ARRAY_SIZE(instdone); i++)
|
|
pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
|
|
if (INTEL_INFO(dev)->gen < 4) {
|
|
u32 ipeir = I915_READ(IPEIR);
|
|
|
|
pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
|
|
pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
|
|
pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
|
|
I915_WRITE(IPEIR, ipeir);
|
|
POSTING_READ(IPEIR);
|
|
} else {
|
|
u32 ipeir = I915_READ(IPEIR_I965);
|
|
|
|
pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
|
|
pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
|
|
pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
|
|
pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
|
|
I915_WRITE(IPEIR_I965, ipeir);
|
|
POSTING_READ(IPEIR_I965);
|
|
}
|
|
}
|
|
|
|
I915_WRITE(EIR, eir);
|
|
POSTING_READ(EIR);
|
|
eir = I915_READ(EIR);
|
|
if (eir) {
|
|
/*
|
|
* some errors might have become stuck,
|
|
* mask them.
|
|
*/
|
|
DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
|
|
I915_WRITE(EMR, I915_READ(EMR) | eir);
|
|
I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* i915_handle_error - handle an error interrupt
|
|
* @dev: drm device
|
|
*
|
|
* Do some basic checking of regsiter state at error interrupt time and
|
|
* dump it to the syslog. Also call i915_capture_error_state() to make
|
|
* sure we get a record and make it available in debugfs. Fire a uevent
|
|
* so userspace knows something bad happened (should trigger collection
|
|
* of a ring dump etc.).
|
|
*/
|
|
void i915_handle_error(struct drm_device *dev, bool wedged)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
// i915_capture_error_state(dev);
|
|
i915_report_and_clear_eir(dev);
|
|
|
|
if (wedged) {
|
|
atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG,
|
|
&dev_priv->gpu_error.reset_counter);
|
|
|
|
/*
|
|
* Wakeup waiting processes so that the reset work function
|
|
* i915_error_work_func doesn't deadlock trying to grab various
|
|
* locks. By bumping the reset counter first, the woken
|
|
* processes will see a reset in progress and back off,
|
|
* releasing their locks and then wait for the reset completion.
|
|
* We must do this for _all_ gpu waiters that might hold locks
|
|
* that the reset work needs to acquire.
|
|
*
|
|
* Note: The wake_up serves as the required memory barrier to
|
|
* ensure that the waiters see the updated value of the reset
|
|
* counter atomic_t.
|
|
*/
|
|
i915_error_wake_up(dev_priv, false);
|
|
}
|
|
|
|
/*
|
|
* Our reset work can grab modeset locks (since it needs to reset the
|
|
* state of outstanding pagelips). Hence it must not be run on our own
|
|
* dev-priv->wq work queue for otherwise the flush_work in the pageflip
|
|
* code will deadlock.
|
|
*/
|
|
schedule_work(&dev_priv->gpu_error.work);
|
|
}
|
|
|
|
#if 0
|
|
static void __always_unused i915_pageflip_stall_check(struct drm_device *dev, int pipe)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
|
|
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
|
|
struct drm_i915_gem_object *obj;
|
|
struct intel_unpin_work *work;
|
|
unsigned long flags;
|
|
bool stall_detected;
|
|
|
|
/* Ignore early vblank irqs */
|
|
if (intel_crtc == NULL)
|
|
return;
|
|
|
|
spin_lock_irqsave(&dev->event_lock, flags);
|
|
work = intel_crtc->unpin_work;
|
|
|
|
if (work == NULL ||
|
|
atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE ||
|
|
!work->enable_stall_check) {
|
|
/* Either the pending flip IRQ arrived, or we're too early. Don't check */
|
|
spin_unlock_irqrestore(&dev->event_lock, flags);
|
|
return;
|
|
}
|
|
|
|
/* Potential stall - if we see that the flip has happened, assume a missed interrupt */
|
|
obj = work->pending_flip_obj;
|
|
if (INTEL_INFO(dev)->gen >= 4) {
|
|
int dspsurf = DSPSURF(intel_crtc->plane);
|
|
stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
|
|
i915_gem_obj_ggtt_offset(obj);
|
|
} else {
|
|
int dspaddr = DSPADDR(intel_crtc->plane);
|
|
stall_detected = I915_READ(dspaddr) == (i915_gem_obj_ggtt_offset(obj) +
|
|
crtc->y * crtc->fb->pitches[0] +
|
|
crtc->x * crtc->fb->bits_per_pixel/8);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&dev->event_lock, flags);
|
|
|
|
if (stall_detected) {
|
|
DRM_DEBUG_DRIVER("Pageflip stall detected\n");
|
|
intel_prepare_page_flip(dev, intel_crtc->plane);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
/* Called from drm generic code, passed 'crtc' which
|
|
* we use as a pipe index
|
|
*/
|
|
static int i915_enable_vblank(struct drm_device *dev, int pipe)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
unsigned long irqflags;
|
|
|
|
if (!i915_pipe_enabled(dev, pipe))
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
if (INTEL_INFO(dev)->gen >= 4)
|
|
i915_enable_pipestat(dev_priv, pipe,
|
|
PIPE_START_VBLANK_INTERRUPT_ENABLE);
|
|
else
|
|
i915_enable_pipestat(dev_priv, pipe,
|
|
PIPE_VBLANK_INTERRUPT_ENABLE);
|
|
|
|
/* maintain vblank delivery even in deep C-states */
|
|
if (dev_priv->info->gen == 3)
|
|
I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
unsigned long irqflags;
|
|
uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
|
|
DE_PIPE_VBLANK_ILK(pipe);
|
|
|
|
if (!i915_pipe_enabled(dev, pipe))
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
ironlake_enable_display_irq(dev_priv, bit);
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
unsigned long irqflags;
|
|
u32 imr;
|
|
|
|
if (!i915_pipe_enabled(dev, pipe))
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
imr = I915_READ(VLV_IMR);
|
|
if (pipe == 0)
|
|
imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
|
|
else
|
|
imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
|
|
I915_WRITE(VLV_IMR, imr);
|
|
i915_enable_pipestat(dev_priv, pipe,
|
|
PIPE_START_VBLANK_INTERRUPT_ENABLE);
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Called from drm generic code, passed 'crtc' which
|
|
* we use as a pipe index
|
|
*/
|
|
static void i915_disable_vblank(struct drm_device *dev, int pipe)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
unsigned long irqflags;
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
if (dev_priv->info->gen == 3)
|
|
I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
|
|
|
|
i915_disable_pipestat(dev_priv, pipe,
|
|
PIPE_VBLANK_INTERRUPT_ENABLE |
|
|
PIPE_START_VBLANK_INTERRUPT_ENABLE);
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
}
|
|
|
|
static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
unsigned long irqflags;
|
|
uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
|
|
DE_PIPE_VBLANK_ILK(pipe);
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
ironlake_disable_display_irq(dev_priv, bit);
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
}
|
|
|
|
static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
unsigned long irqflags;
|
|
u32 imr;
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
i915_disable_pipestat(dev_priv, pipe,
|
|
PIPE_START_VBLANK_INTERRUPT_ENABLE);
|
|
imr = I915_READ(VLV_IMR);
|
|
if (pipe == 0)
|
|
imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
|
|
else
|
|
imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
|
|
I915_WRITE(VLV_IMR, imr);
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
}
|
|
|
|
static u32
|
|
ring_last_seqno(struct intel_ring_buffer *ring)
|
|
{
|
|
return list_entry(ring->request_list.prev,
|
|
struct drm_i915_gem_request, list)->seqno;
|
|
}
|
|
|
|
static bool
|
|
ring_idle(struct intel_ring_buffer *ring, u32 seqno)
|
|
{
|
|
return (list_empty(&ring->request_list) ||
|
|
i915_seqno_passed(seqno, ring_last_seqno(ring)));
|
|
}
|
|
|
|
static struct intel_ring_buffer *
|
|
semaphore_waits_for(struct intel_ring_buffer *ring, u32 *seqno)
|
|
{
|
|
struct drm_i915_private *dev_priv = ring->dev->dev_private;
|
|
u32 cmd, ipehr, acthd, acthd_min;
|
|
|
|
ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
|
|
if ((ipehr & ~(0x3 << 16)) !=
|
|
(MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE | MI_SEMAPHORE_REGISTER))
|
|
return NULL;
|
|
|
|
/* ACTHD is likely pointing to the dword after the actual command,
|
|
* so scan backwards until we find the MBOX.
|
|
*/
|
|
acthd = intel_ring_get_active_head(ring) & HEAD_ADDR;
|
|
acthd_min = max((int)acthd - 3 * 4, 0);
|
|
do {
|
|
cmd = ioread32(ring->virtual_start + acthd);
|
|
if (cmd == ipehr)
|
|
break;
|
|
|
|
acthd -= 4;
|
|
if (acthd < acthd_min)
|
|
return NULL;
|
|
} while (1);
|
|
|
|
*seqno = ioread32(ring->virtual_start+acthd+4)+1;
|
|
return &dev_priv->ring[(ring->id + (((ipehr >> 17) & 1) + 1)) % 3];
|
|
}
|
|
|
|
static int semaphore_passed(struct intel_ring_buffer *ring)
|
|
{
|
|
struct drm_i915_private *dev_priv = ring->dev->dev_private;
|
|
struct intel_ring_buffer *signaller;
|
|
u32 seqno, ctl;
|
|
|
|
ring->hangcheck.deadlock = true;
|
|
|
|
signaller = semaphore_waits_for(ring, &seqno);
|
|
if (signaller == NULL || signaller->hangcheck.deadlock)
|
|
return -1;
|
|
|
|
/* cursory check for an unkickable deadlock */
|
|
ctl = I915_READ_CTL(signaller);
|
|
if (ctl & RING_WAIT_SEMAPHORE && semaphore_passed(signaller) < 0)
|
|
return -1;
|
|
|
|
return i915_seqno_passed(signaller->get_seqno(signaller, false), seqno);
|
|
}
|
|
|
|
static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv)
|
|
{
|
|
struct intel_ring_buffer *ring;
|
|
int i;
|
|
|
|
for_each_ring(ring, dev_priv, i)
|
|
ring->hangcheck.deadlock = false;
|
|
}
|
|
|
|
static enum intel_ring_hangcheck_action
|
|
ring_stuck(struct intel_ring_buffer *ring, u32 acthd)
|
|
{
|
|
struct drm_device *dev = ring->dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 tmp;
|
|
|
|
if (ring->hangcheck.acthd != acthd)
|
|
return HANGCHECK_ACTIVE;
|
|
|
|
if (IS_GEN2(dev))
|
|
return HANGCHECK_HUNG;
|
|
|
|
/* Is the chip hanging on a WAIT_FOR_EVENT?
|
|
* If so we can simply poke the RB_WAIT bit
|
|
* and break the hang. This should work on
|
|
* all but the second generation chipsets.
|
|
*/
|
|
tmp = I915_READ_CTL(ring);
|
|
if (tmp & RING_WAIT) {
|
|
DRM_ERROR("Kicking stuck wait on %s\n",
|
|
ring->name);
|
|
I915_WRITE_CTL(ring, tmp);
|
|
return HANGCHECK_KICK;
|
|
}
|
|
|
|
if (INTEL_INFO(dev)->gen >= 6 && tmp & RING_WAIT_SEMAPHORE) {
|
|
switch (semaphore_passed(ring)) {
|
|
default:
|
|
return HANGCHECK_HUNG;
|
|
case 1:
|
|
DRM_ERROR("Kicking stuck semaphore on %s\n",
|
|
ring->name);
|
|
I915_WRITE_CTL(ring, tmp);
|
|
return HANGCHECK_KICK;
|
|
case 0:
|
|
return HANGCHECK_WAIT;
|
|
}
|
|
}
|
|
|
|
return HANGCHECK_HUNG;
|
|
}
|
|
|
|
/**
|
|
* This is called when the chip hasn't reported back with completed
|
|
* batchbuffers in a long time. We keep track per ring seqno progress and
|
|
* if there are no progress, hangcheck score for that ring is increased.
|
|
* Further, acthd is inspected to see if the ring is stuck. On stuck case
|
|
* we kick the ring. If we see no progress on three subsequent calls
|
|
* we assume chip is wedged and try to fix it by resetting the chip.
|
|
*/
|
|
static void i915_hangcheck_elapsed(unsigned long data)
|
|
{
|
|
struct drm_device *dev = (struct drm_device *)data;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct intel_ring_buffer *ring;
|
|
int i;
|
|
int busy_count = 0, rings_hung = 0;
|
|
bool stuck[I915_NUM_RINGS] = { 0 };
|
|
#define BUSY 1
|
|
#define KICK 5
|
|
#define HUNG 20
|
|
#define FIRE 30
|
|
|
|
if (!i915_enable_hangcheck)
|
|
return;
|
|
|
|
for_each_ring(ring, dev_priv, i) {
|
|
u32 seqno, acthd;
|
|
bool busy = true;
|
|
|
|
semaphore_clear_deadlocks(dev_priv);
|
|
|
|
seqno = ring->get_seqno(ring, false);
|
|
acthd = intel_ring_get_active_head(ring);
|
|
|
|
if (ring->hangcheck.seqno == seqno) {
|
|
if (ring_idle(ring, seqno)) {
|
|
// if (waitqueue_active(&ring->irq_queue)) {
|
|
/* Issue a wake-up to catch stuck h/w. */
|
|
// DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
|
|
// ring->name);
|
|
// wake_up_all(&ring->irq_queue);
|
|
// } else
|
|
busy = false;
|
|
} else {
|
|
/* We always increment the hangcheck score
|
|
* if the ring is busy and still processing
|
|
* the same request, so that no single request
|
|
* can run indefinitely (such as a chain of
|
|
* batches). The only time we do not increment
|
|
* the hangcheck score on this ring, if this
|
|
* ring is in a legitimate wait for another
|
|
* ring. In that case the waiting ring is a
|
|
* victim and we want to be sure we catch the
|
|
* right culprit. Then every time we do kick
|
|
* the ring, add a small increment to the
|
|
* score so that we can catch a batch that is
|
|
* being repeatedly kicked and so responsible
|
|
* for stalling the machine.
|
|
*/
|
|
ring->hangcheck.action = ring_stuck(ring,
|
|
acthd);
|
|
|
|
switch (ring->hangcheck.action) {
|
|
case HANGCHECK_WAIT:
|
|
break;
|
|
case HANGCHECK_ACTIVE:
|
|
ring->hangcheck.score += BUSY;
|
|
break;
|
|
case HANGCHECK_KICK:
|
|
ring->hangcheck.score += KICK;
|
|
break;
|
|
case HANGCHECK_HUNG:
|
|
ring->hangcheck.score += HUNG;
|
|
stuck[i] = true;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
/* Gradually reduce the count so that we catch DoS
|
|
* attempts across multiple batches.
|
|
*/
|
|
if (ring->hangcheck.score > 0)
|
|
ring->hangcheck.score--;
|
|
}
|
|
|
|
ring->hangcheck.seqno = seqno;
|
|
ring->hangcheck.acthd = acthd;
|
|
busy_count += busy;
|
|
}
|
|
|
|
for_each_ring(ring, dev_priv, i) {
|
|
if (ring->hangcheck.score > FIRE) {
|
|
DRM_INFO("%s on %s\n",
|
|
stuck[i] ? "stuck" : "no progress",
|
|
ring->name);
|
|
rings_hung++;
|
|
}
|
|
}
|
|
|
|
// if (rings_hung)
|
|
// return i915_handle_error(dev, true);
|
|
|
|
}
|
|
|
|
static void ibx_irq_preinstall(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
if (HAS_PCH_NOP(dev))
|
|
return;
|
|
|
|
/* south display irq */
|
|
I915_WRITE(SDEIMR, 0xffffffff);
|
|
/*
|
|
* SDEIER is also touched by the interrupt handler to work around missed
|
|
* PCH interrupts. Hence we can't update it after the interrupt handler
|
|
* is enabled - instead we unconditionally enable all PCH interrupt
|
|
* sources here, but then only unmask them as needed with SDEIMR.
|
|
*/
|
|
I915_WRITE(SDEIER, 0xffffffff);
|
|
POSTING_READ(SDEIER);
|
|
}
|
|
|
|
static void gen5_gt_irq_preinstall(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
/* and GT */
|
|
I915_WRITE(GTIMR, 0xffffffff);
|
|
I915_WRITE(GTIER, 0x0);
|
|
POSTING_READ(GTIER);
|
|
|
|
if (INTEL_INFO(dev)->gen >= 6) {
|
|
/* and PM */
|
|
I915_WRITE(GEN6_PMIMR, 0xffffffff);
|
|
I915_WRITE(GEN6_PMIER, 0x0);
|
|
POSTING_READ(GEN6_PMIER);
|
|
}
|
|
}
|
|
|
|
/* drm_dma.h hooks
|
|
*/
|
|
static void ironlake_irq_preinstall(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
|
|
atomic_set(&dev_priv->irq_received, 0);
|
|
|
|
I915_WRITE(HWSTAM, 0xeffe);
|
|
|
|
I915_WRITE(DEIMR, 0xffffffff);
|
|
I915_WRITE(DEIER, 0x0);
|
|
POSTING_READ(DEIER);
|
|
|
|
gen5_gt_irq_preinstall(dev);
|
|
|
|
ibx_irq_preinstall(dev);
|
|
}
|
|
|
|
static void valleyview_irq_preinstall(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
int pipe;
|
|
|
|
atomic_set(&dev_priv->irq_received, 0);
|
|
|
|
/* VLV magic */
|
|
I915_WRITE(VLV_IMR, 0);
|
|
I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
|
|
I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
|
|
I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
|
|
|
|
/* and GT */
|
|
I915_WRITE(GTIIR, I915_READ(GTIIR));
|
|
I915_WRITE(GTIIR, I915_READ(GTIIR));
|
|
|
|
gen5_gt_irq_preinstall(dev);
|
|
|
|
I915_WRITE(DPINVGTT, 0xff);
|
|
|
|
I915_WRITE(PORT_HOTPLUG_EN, 0);
|
|
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
|
|
for_each_pipe(pipe)
|
|
I915_WRITE(PIPESTAT(pipe), 0xffff);
|
|
I915_WRITE(VLV_IIR, 0xffffffff);
|
|
I915_WRITE(VLV_IMR, 0xffffffff);
|
|
I915_WRITE(VLV_IER, 0x0);
|
|
POSTING_READ(VLV_IER);
|
|
}
|
|
|
|
static void ibx_hpd_irq_setup(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
struct drm_mode_config *mode_config = &dev->mode_config;
|
|
struct intel_encoder *intel_encoder;
|
|
u32 hotplug_irqs, hotplug, enabled_irqs = 0;
|
|
|
|
if (HAS_PCH_IBX(dev)) {
|
|
hotplug_irqs = SDE_HOTPLUG_MASK;
|
|
list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
|
|
if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
|
|
enabled_irqs |= hpd_ibx[intel_encoder->hpd_pin];
|
|
} else {
|
|
hotplug_irqs = SDE_HOTPLUG_MASK_CPT;
|
|
list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
|
|
if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
|
|
enabled_irqs |= hpd_cpt[intel_encoder->hpd_pin];
|
|
}
|
|
|
|
ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
|
|
|
|
/*
|
|
* Enable digital hotplug on the PCH, and configure the DP short pulse
|
|
* duration to 2ms (which is the minimum in the Display Port spec)
|
|
*
|
|
* This register is the same on all known PCH chips.
|
|
*/
|
|
hotplug = I915_READ(PCH_PORT_HOTPLUG);
|
|
hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
|
|
hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
|
|
hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
|
|
hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
|
|
I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
|
|
}
|
|
|
|
static void ibx_irq_postinstall(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
u32 mask;
|
|
|
|
if (HAS_PCH_NOP(dev))
|
|
return;
|
|
|
|
if (HAS_PCH_IBX(dev)) {
|
|
mask = SDE_GMBUS | SDE_AUX_MASK | SDE_TRANSB_FIFO_UNDER |
|
|
SDE_TRANSA_FIFO_UNDER | SDE_POISON;
|
|
} else {
|
|
mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT | SDE_ERROR_CPT;
|
|
|
|
I915_WRITE(SERR_INT, I915_READ(SERR_INT));
|
|
}
|
|
|
|
I915_WRITE(SDEIIR, I915_READ(SDEIIR));
|
|
I915_WRITE(SDEIMR, ~mask);
|
|
}
|
|
|
|
static void gen5_gt_irq_postinstall(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 pm_irqs, gt_irqs;
|
|
|
|
pm_irqs = gt_irqs = 0;
|
|
|
|
dev_priv->gt_irq_mask = ~0;
|
|
if (HAS_L3_GPU_CACHE(dev)) {
|
|
/* L3 parity interrupt is always unmasked. */
|
|
dev_priv->gt_irq_mask = ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
|
|
gt_irqs |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
|
|
}
|
|
|
|
gt_irqs |= GT_RENDER_USER_INTERRUPT;
|
|
if (IS_GEN5(dev)) {
|
|
gt_irqs |= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT |
|
|
ILK_BSD_USER_INTERRUPT;
|
|
} else {
|
|
gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
|
|
}
|
|
|
|
I915_WRITE(GTIIR, I915_READ(GTIIR));
|
|
I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
|
|
I915_WRITE(GTIER, gt_irqs);
|
|
POSTING_READ(GTIER);
|
|
|
|
if (INTEL_INFO(dev)->gen >= 6) {
|
|
pm_irqs |= GEN6_PM_RPS_EVENTS;
|
|
|
|
if (HAS_VEBOX(dev))
|
|
pm_irqs |= PM_VEBOX_USER_INTERRUPT;
|
|
|
|
dev_priv->pm_irq_mask = 0xffffffff;
|
|
I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
|
|
I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask);
|
|
I915_WRITE(GEN6_PMIER, pm_irqs);
|
|
POSTING_READ(GEN6_PMIER);
|
|
}
|
|
}
|
|
|
|
static int ironlake_irq_postinstall(struct drm_device *dev)
|
|
{
|
|
unsigned long irqflags;
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
u32 display_mask, extra_mask;
|
|
|
|
if (INTEL_INFO(dev)->gen >= 7) {
|
|
display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
|
|
DE_PCH_EVENT_IVB | DE_PLANEC_FLIP_DONE_IVB |
|
|
DE_PLANEB_FLIP_DONE_IVB |
|
|
DE_PLANEA_FLIP_DONE_IVB | DE_AUX_CHANNEL_A_IVB |
|
|
DE_ERR_INT_IVB);
|
|
extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB |
|
|
DE_PIPEA_VBLANK_IVB);
|
|
|
|
I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
|
|
} else {
|
|
display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
|
|
DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
|
|
DE_AUX_CHANNEL_A | DE_PIPEB_FIFO_UNDERRUN |
|
|
DE_PIPEA_FIFO_UNDERRUN | DE_POISON);
|
|
extra_mask = DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT;
|
|
}
|
|
|
|
dev_priv->irq_mask = ~display_mask;
|
|
|
|
/* should always can generate irq */
|
|
I915_WRITE(DEIIR, I915_READ(DEIIR));
|
|
I915_WRITE(DEIMR, dev_priv->irq_mask);
|
|
I915_WRITE(DEIER, display_mask | extra_mask);
|
|
POSTING_READ(DEIER);
|
|
|
|
gen5_gt_irq_postinstall(dev);
|
|
|
|
ibx_irq_postinstall(dev);
|
|
|
|
if (IS_IRONLAKE_M(dev)) {
|
|
/* Enable PCU event interrupts
|
|
*
|
|
* spinlocking not required here for correctness since interrupt
|
|
* setup is guaranteed to run in single-threaded context. But we
|
|
* need it to make the assert_spin_locked happy. */
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int valleyview_irq_postinstall(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
u32 enable_mask;
|
|
u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV;
|
|
unsigned long irqflags;
|
|
|
|
enable_mask = I915_DISPLAY_PORT_INTERRUPT;
|
|
enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
|
|
I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
|
|
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
|
|
I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
|
|
|
|
/*
|
|
*Leave vblank interrupts masked initially. enable/disable will
|
|
* toggle them based on usage.
|
|
*/
|
|
dev_priv->irq_mask = (~enable_mask) |
|
|
I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
|
|
I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
|
|
|
|
I915_WRITE(PORT_HOTPLUG_EN, 0);
|
|
POSTING_READ(PORT_HOTPLUG_EN);
|
|
|
|
I915_WRITE(VLV_IMR, dev_priv->irq_mask);
|
|
I915_WRITE(VLV_IER, enable_mask);
|
|
I915_WRITE(VLV_IIR, 0xffffffff);
|
|
I915_WRITE(PIPESTAT(0), 0xffff);
|
|
I915_WRITE(PIPESTAT(1), 0xffff);
|
|
POSTING_READ(VLV_IER);
|
|
|
|
/* Interrupt setup is already guaranteed to be single-threaded, this is
|
|
* just to make the assert_spin_locked check happy. */
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
i915_enable_pipestat(dev_priv, 0, pipestat_enable);
|
|
i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
|
|
i915_enable_pipestat(dev_priv, 1, pipestat_enable);
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
|
|
I915_WRITE(VLV_IIR, 0xffffffff);
|
|
I915_WRITE(VLV_IIR, 0xffffffff);
|
|
|
|
gen5_gt_irq_postinstall(dev);
|
|
|
|
/* ack & enable invalid PTE error interrupts */
|
|
#if 0 /* FIXME: add support to irq handler for checking these bits */
|
|
I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
|
|
I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
|
|
#endif
|
|
|
|
I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void valleyview_irq_uninstall(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
int pipe;
|
|
|
|
if (!dev_priv)
|
|
return;
|
|
|
|
for_each_pipe(pipe)
|
|
I915_WRITE(PIPESTAT(pipe), 0xffff);
|
|
|
|
I915_WRITE(HWSTAM, 0xffffffff);
|
|
I915_WRITE(PORT_HOTPLUG_EN, 0);
|
|
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
|
|
for_each_pipe(pipe)
|
|
I915_WRITE(PIPESTAT(pipe), 0xffff);
|
|
I915_WRITE(VLV_IIR, 0xffffffff);
|
|
I915_WRITE(VLV_IMR, 0xffffffff);
|
|
I915_WRITE(VLV_IER, 0x0);
|
|
POSTING_READ(VLV_IER);
|
|
}
|
|
|
|
static void ironlake_irq_uninstall(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
|
|
if (!dev_priv)
|
|
return;
|
|
|
|
I915_WRITE(HWSTAM, 0xffffffff);
|
|
|
|
I915_WRITE(DEIMR, 0xffffffff);
|
|
I915_WRITE(DEIER, 0x0);
|
|
I915_WRITE(DEIIR, I915_READ(DEIIR));
|
|
if (IS_GEN7(dev))
|
|
I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
|
|
|
|
I915_WRITE(GTIMR, 0xffffffff);
|
|
I915_WRITE(GTIER, 0x0);
|
|
I915_WRITE(GTIIR, I915_READ(GTIIR));
|
|
|
|
if (HAS_PCH_NOP(dev))
|
|
return;
|
|
|
|
I915_WRITE(SDEIMR, 0xffffffff);
|
|
I915_WRITE(SDEIER, 0x0);
|
|
I915_WRITE(SDEIIR, I915_READ(SDEIIR));
|
|
if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev))
|
|
I915_WRITE(SERR_INT, I915_READ(SERR_INT));
|
|
}
|
|
|
|
#if 0
|
|
|
|
static void i8xx_irq_preinstall(struct drm_device * dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
int pipe;
|
|
|
|
atomic_set(&dev_priv->irq_received, 0);
|
|
|
|
for_each_pipe(pipe)
|
|
I915_WRITE(PIPESTAT(pipe), 0);
|
|
I915_WRITE16(IMR, 0xffff);
|
|
I915_WRITE16(IER, 0x0);
|
|
POSTING_READ16(IER);
|
|
}
|
|
|
|
static int i8xx_irq_postinstall(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
|
|
I915_WRITE16(EMR,
|
|
~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
|
|
|
|
/* Unmask the interrupts that we always want on. */
|
|
dev_priv->irq_mask =
|
|
~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
|
|
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
|
|
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
|
|
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
|
|
I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
|
|
I915_WRITE16(IMR, dev_priv->irq_mask);
|
|
|
|
I915_WRITE16(IER,
|
|
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
|
|
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
|
|
I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
|
|
I915_USER_INTERRUPT);
|
|
POSTING_READ16(IER);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns true when a page flip has completed.
|
|
*/
|
|
static bool i8xx_handle_vblank(struct drm_device *dev,
|
|
int pipe, u16 iir)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(pipe);
|
|
|
|
// if (!drm_handle_vblank(dev, pipe))
|
|
return false;
|
|
|
|
if ((iir & flip_pending) == 0)
|
|
return false;
|
|
|
|
// intel_prepare_page_flip(dev, pipe);
|
|
|
|
/* We detect FlipDone by looking for the change in PendingFlip from '1'
|
|
* to '0' on the following vblank, i.e. IIR has the Pendingflip
|
|
* asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
|
|
* the flip is completed (no longer pending). Since this doesn't raise
|
|
* an interrupt per se, we watch for the change at vblank.
|
|
*/
|
|
if (I915_READ16(ISR) & flip_pending)
|
|
return false;
|
|
|
|
intel_finish_page_flip(dev, pipe);
|
|
|
|
return true;
|
|
}
|
|
|
|
static irqreturn_t i8xx_irq_handler(int irq, void *arg)
|
|
{
|
|
struct drm_device *dev = (struct drm_device *) arg;
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
u16 iir, new_iir;
|
|
u32 pipe_stats[2];
|
|
unsigned long irqflags;
|
|
int pipe;
|
|
u16 flip_mask =
|
|
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
|
|
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
|
|
|
|
atomic_inc(&dev_priv->irq_received);
|
|
|
|
iir = I915_READ16(IIR);
|
|
if (iir == 0)
|
|
return IRQ_NONE;
|
|
|
|
while (iir & ~flip_mask) {
|
|
/* Can't rely on pipestat interrupt bit in iir as it might
|
|
* have been cleared after the pipestat interrupt was received.
|
|
* It doesn't set the bit in iir again, but it still produces
|
|
* interrupts (for non-MSI).
|
|
*/
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
|
|
i915_handle_error(dev, false);
|
|
|
|
for_each_pipe(pipe) {
|
|
int reg = PIPESTAT(pipe);
|
|
pipe_stats[pipe] = I915_READ(reg);
|
|
|
|
/*
|
|
* Clear the PIPE*STAT regs before the IIR
|
|
*/
|
|
if (pipe_stats[pipe] & 0x8000ffff) {
|
|
if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
|
|
DRM_DEBUG_DRIVER("pipe %c underrun\n",
|
|
pipe_name(pipe));
|
|
I915_WRITE(reg, pipe_stats[pipe]);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
|
|
I915_WRITE16(IIR, iir & ~flip_mask);
|
|
new_iir = I915_READ16(IIR); /* Flush posted writes */
|
|
|
|
i915_update_dri1_breadcrumb(dev);
|
|
|
|
if (iir & I915_USER_INTERRUPT)
|
|
notify_ring(dev, &dev_priv->ring[RCS]);
|
|
|
|
if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS &&
|
|
i8xx_handle_vblank(dev, 0, iir))
|
|
flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(0);
|
|
|
|
if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS &&
|
|
i8xx_handle_vblank(dev, 1, iir))
|
|
flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(1);
|
|
|
|
iir = new_iir;
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void i8xx_irq_uninstall(struct drm_device * dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
int pipe;
|
|
|
|
for_each_pipe(pipe) {
|
|
/* Clear enable bits; then clear status bits */
|
|
I915_WRITE(PIPESTAT(pipe), 0);
|
|
I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
|
|
}
|
|
I915_WRITE16(IMR, 0xffff);
|
|
I915_WRITE16(IER, 0x0);
|
|
I915_WRITE16(IIR, I915_READ16(IIR));
|
|
}
|
|
|
|
#endif
|
|
|
|
static void i915_irq_preinstall(struct drm_device * dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
int pipe;
|
|
|
|
atomic_set(&dev_priv->irq_received, 0);
|
|
|
|
if (I915_HAS_HOTPLUG(dev)) {
|
|
I915_WRITE(PORT_HOTPLUG_EN, 0);
|
|
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
|
|
}
|
|
|
|
I915_WRITE16(HWSTAM, 0xeffe);
|
|
for_each_pipe(pipe)
|
|
I915_WRITE(PIPESTAT(pipe), 0);
|
|
I915_WRITE(IMR, 0xffffffff);
|
|
I915_WRITE(IER, 0x0);
|
|
POSTING_READ(IER);
|
|
}
|
|
|
|
static int i915_irq_postinstall(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
u32 enable_mask;
|
|
|
|
I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
|
|
|
|
/* Unmask the interrupts that we always want on. */
|
|
dev_priv->irq_mask =
|
|
~(I915_ASLE_INTERRUPT |
|
|
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
|
|
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
|
|
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
|
|
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
|
|
I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
|
|
|
|
enable_mask =
|
|
I915_ASLE_INTERRUPT |
|
|
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
|
|
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
|
|
I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
|
|
I915_USER_INTERRUPT;
|
|
|
|
if (I915_HAS_HOTPLUG(dev)) {
|
|
I915_WRITE(PORT_HOTPLUG_EN, 0);
|
|
POSTING_READ(PORT_HOTPLUG_EN);
|
|
|
|
/* Enable in IER... */
|
|
enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
|
|
/* and unmask in IMR */
|
|
dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
|
|
}
|
|
|
|
I915_WRITE(IMR, dev_priv->irq_mask);
|
|
I915_WRITE(IER, enable_mask);
|
|
POSTING_READ(IER);
|
|
|
|
i915_enable_asle_pipestat(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns true when a page flip has completed.
|
|
*/
|
|
static bool i915_handle_vblank(struct drm_device *dev,
|
|
int plane, int pipe, u32 iir)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
|
|
|
|
// if (!drm_handle_vblank(dev, pipe))
|
|
return false;
|
|
|
|
if ((iir & flip_pending) == 0)
|
|
return false;
|
|
|
|
// intel_prepare_page_flip(dev, plane);
|
|
|
|
/* We detect FlipDone by looking for the change in PendingFlip from '1'
|
|
* to '0' on the following vblank, i.e. IIR has the Pendingflip
|
|
* asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
|
|
* the flip is completed (no longer pending). Since this doesn't raise
|
|
* an interrupt per se, we watch for the change at vblank.
|
|
*/
|
|
if (I915_READ(ISR) & flip_pending)
|
|
return false;
|
|
|
|
intel_finish_page_flip(dev, pipe);
|
|
|
|
return true;
|
|
}
|
|
|
|
static irqreturn_t i915_irq_handler(int irq, void *arg)
|
|
{
|
|
struct drm_device *dev = (struct drm_device *) arg;
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
|
|
unsigned long irqflags;
|
|
u32 flip_mask =
|
|
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
|
|
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
|
|
int pipe, ret = IRQ_NONE;
|
|
|
|
atomic_inc(&dev_priv->irq_received);
|
|
|
|
iir = I915_READ(IIR);
|
|
do {
|
|
bool irq_received = (iir & ~flip_mask) != 0;
|
|
bool blc_event = false;
|
|
|
|
/* Can't rely on pipestat interrupt bit in iir as it might
|
|
* have been cleared after the pipestat interrupt was received.
|
|
* It doesn't set the bit in iir again, but it still produces
|
|
* interrupts (for non-MSI).
|
|
*/
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
|
|
i915_handle_error(dev, false);
|
|
|
|
for_each_pipe(pipe) {
|
|
int reg = PIPESTAT(pipe);
|
|
pipe_stats[pipe] = I915_READ(reg);
|
|
|
|
/* Clear the PIPE*STAT regs before the IIR */
|
|
if (pipe_stats[pipe] & 0x8000ffff) {
|
|
if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
|
|
DRM_DEBUG_DRIVER("pipe %c underrun\n",
|
|
pipe_name(pipe));
|
|
I915_WRITE(reg, pipe_stats[pipe]);
|
|
irq_received = true;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
|
|
if (!irq_received)
|
|
break;
|
|
|
|
/* Consume port. Then clear IIR or we'll miss events */
|
|
if ((I915_HAS_HOTPLUG(dev)) &&
|
|
(iir & I915_DISPLAY_PORT_INTERRUPT)) {
|
|
u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
|
|
u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
|
|
|
|
DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
|
|
hotplug_status);
|
|
|
|
intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
|
|
|
|
I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
|
|
POSTING_READ(PORT_HOTPLUG_STAT);
|
|
}
|
|
|
|
I915_WRITE(IIR, iir & ~flip_mask);
|
|
new_iir = I915_READ(IIR); /* Flush posted writes */
|
|
|
|
if (iir & I915_USER_INTERRUPT)
|
|
notify_ring(dev, &dev_priv->ring[RCS]);
|
|
|
|
for_each_pipe(pipe) {
|
|
int plane = pipe;
|
|
if (IS_MOBILE(dev))
|
|
plane = !plane;
|
|
|
|
if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
|
|
i915_handle_vblank(dev, plane, pipe, iir))
|
|
flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
|
|
|
|
if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
|
|
blc_event = true;
|
|
}
|
|
|
|
if (blc_event || (iir & I915_ASLE_INTERRUPT))
|
|
intel_opregion_asle_intr(dev);
|
|
|
|
/* With MSI, interrupts are only generated when iir
|
|
* transitions from zero to nonzero. If another bit got
|
|
* set while we were handling the existing iir bits, then
|
|
* we would never get another interrupt.
|
|
*
|
|
* This is fine on non-MSI as well, as if we hit this path
|
|
* we avoid exiting the interrupt handler only to generate
|
|
* another one.
|
|
*
|
|
* Note that for MSI this could cause a stray interrupt report
|
|
* if an interrupt landed in the time between writing IIR and
|
|
* the posting read. This should be rare enough to never
|
|
* trigger the 99% of 100,000 interrupts test for disabling
|
|
* stray interrupts.
|
|
*/
|
|
ret = IRQ_HANDLED;
|
|
iir = new_iir;
|
|
} while (iir & ~flip_mask);
|
|
|
|
i915_update_dri1_breadcrumb(dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void i915_irq_uninstall(struct drm_device * dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
int pipe;
|
|
|
|
if (I915_HAS_HOTPLUG(dev)) {
|
|
I915_WRITE(PORT_HOTPLUG_EN, 0);
|
|
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
|
|
}
|
|
|
|
I915_WRITE16(HWSTAM, 0xffff);
|
|
for_each_pipe(pipe) {
|
|
/* Clear enable bits; then clear status bits */
|
|
I915_WRITE(PIPESTAT(pipe), 0);
|
|
I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
|
|
}
|
|
I915_WRITE(IMR, 0xffffffff);
|
|
I915_WRITE(IER, 0x0);
|
|
|
|
I915_WRITE(IIR, I915_READ(IIR));
|
|
}
|
|
|
|
static void i965_irq_preinstall(struct drm_device * dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
int pipe;
|
|
|
|
atomic_set(&dev_priv->irq_received, 0);
|
|
|
|
I915_WRITE(PORT_HOTPLUG_EN, 0);
|
|
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
|
|
|
|
I915_WRITE(HWSTAM, 0xeffe);
|
|
for_each_pipe(pipe)
|
|
I915_WRITE(PIPESTAT(pipe), 0);
|
|
I915_WRITE(IMR, 0xffffffff);
|
|
I915_WRITE(IER, 0x0);
|
|
POSTING_READ(IER);
|
|
}
|
|
|
|
static int i965_irq_postinstall(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
u32 enable_mask;
|
|
u32 error_mask;
|
|
unsigned long irqflags;
|
|
|
|
/* Unmask the interrupts that we always want on. */
|
|
dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
|
|
I915_DISPLAY_PORT_INTERRUPT |
|
|
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
|
|
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
|
|
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
|
|
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
|
|
I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
|
|
|
|
enable_mask = ~dev_priv->irq_mask;
|
|
enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
|
|
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
|
|
enable_mask |= I915_USER_INTERRUPT;
|
|
|
|
if (IS_G4X(dev))
|
|
enable_mask |= I915_BSD_USER_INTERRUPT;
|
|
|
|
/* Interrupt setup is already guaranteed to be single-threaded, this is
|
|
* just to make the assert_spin_locked check happy. */
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
|
|
/*
|
|
* Enable some error detection, note the instruction error mask
|
|
* bit is reserved, so we leave it masked.
|
|
*/
|
|
if (IS_G4X(dev)) {
|
|
error_mask = ~(GM45_ERROR_PAGE_TABLE |
|
|
GM45_ERROR_MEM_PRIV |
|
|
GM45_ERROR_CP_PRIV |
|
|
I915_ERROR_MEMORY_REFRESH);
|
|
} else {
|
|
error_mask = ~(I915_ERROR_PAGE_TABLE |
|
|
I915_ERROR_MEMORY_REFRESH);
|
|
}
|
|
I915_WRITE(EMR, error_mask);
|
|
|
|
I915_WRITE(IMR, dev_priv->irq_mask);
|
|
I915_WRITE(IER, enable_mask);
|
|
POSTING_READ(IER);
|
|
|
|
I915_WRITE(PORT_HOTPLUG_EN, 0);
|
|
POSTING_READ(PORT_HOTPLUG_EN);
|
|
|
|
i915_enable_asle_pipestat(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void i915_hpd_irq_setup(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
struct drm_mode_config *mode_config = &dev->mode_config;
|
|
struct intel_encoder *intel_encoder;
|
|
u32 hotplug_en;
|
|
|
|
assert_spin_locked(&dev_priv->irq_lock);
|
|
|
|
if (I915_HAS_HOTPLUG(dev)) {
|
|
hotplug_en = I915_READ(PORT_HOTPLUG_EN);
|
|
hotplug_en &= ~HOTPLUG_INT_EN_MASK;
|
|
/* Note HDMI and DP share hotplug bits */
|
|
/* enable bits are the same for all generations */
|
|
list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
|
|
if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
|
|
hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin];
|
|
/* Programming the CRT detection parameters tends
|
|
to generate a spurious hotplug event about three
|
|
seconds later. So just do it once.
|
|
*/
|
|
if (IS_G4X(dev))
|
|
hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
|
|
hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK;
|
|
hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
|
|
|
|
/* Ignore TV since it's buggy */
|
|
I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t i965_irq_handler(int irq, void *arg)
|
|
{
|
|
struct drm_device *dev = (struct drm_device *) arg;
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
u32 iir, new_iir;
|
|
u32 pipe_stats[I915_MAX_PIPES];
|
|
unsigned long irqflags;
|
|
int irq_received;
|
|
int ret = IRQ_NONE, pipe;
|
|
u32 flip_mask =
|
|
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
|
|
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
|
|
|
|
atomic_inc(&dev_priv->irq_received);
|
|
|
|
iir = I915_READ(IIR);
|
|
|
|
for (;;) {
|
|
bool blc_event = false;
|
|
|
|
irq_received = (iir & ~flip_mask) != 0;
|
|
|
|
/* Can't rely on pipestat interrupt bit in iir as it might
|
|
* have been cleared after the pipestat interrupt was received.
|
|
* It doesn't set the bit in iir again, but it still produces
|
|
* interrupts (for non-MSI).
|
|
*/
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
|
|
i915_handle_error(dev, false);
|
|
|
|
for_each_pipe(pipe) {
|
|
int reg = PIPESTAT(pipe);
|
|
pipe_stats[pipe] = I915_READ(reg);
|
|
|
|
/*
|
|
* Clear the PIPE*STAT regs before the IIR
|
|
*/
|
|
if (pipe_stats[pipe] & 0x8000ffff) {
|
|
if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
|
|
DRM_DEBUG_DRIVER("pipe %c underrun\n",
|
|
pipe_name(pipe));
|
|
I915_WRITE(reg, pipe_stats[pipe]);
|
|
irq_received = 1;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
|
|
if (!irq_received)
|
|
break;
|
|
|
|
ret = IRQ_HANDLED;
|
|
|
|
/* Consume port. Then clear IIR or we'll miss events */
|
|
if (iir & I915_DISPLAY_PORT_INTERRUPT) {
|
|
u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
|
|
u32 hotplug_trigger = hotplug_status & (IS_G4X(dev) ?
|
|
HOTPLUG_INT_STATUS_G4X :
|
|
HOTPLUG_INT_STATUS_I915);
|
|
|
|
DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
|
|
hotplug_status);
|
|
|
|
intel_hpd_irq_handler(dev, hotplug_trigger,
|
|
IS_G4X(dev) ? hpd_status_gen4 : hpd_status_i915);
|
|
|
|
I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
|
|
I915_READ(PORT_HOTPLUG_STAT);
|
|
}
|
|
|
|
I915_WRITE(IIR, iir & ~flip_mask);
|
|
new_iir = I915_READ(IIR); /* Flush posted writes */
|
|
|
|
if (iir & I915_USER_INTERRUPT)
|
|
notify_ring(dev, &dev_priv->ring[RCS]);
|
|
if (iir & I915_BSD_USER_INTERRUPT)
|
|
notify_ring(dev, &dev_priv->ring[VCS]);
|
|
|
|
for_each_pipe(pipe) {
|
|
if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
|
|
i915_handle_vblank(dev, pipe, pipe, iir))
|
|
flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
|
|
|
|
if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
|
|
blc_event = true;
|
|
}
|
|
|
|
|
|
if (blc_event || (iir & I915_ASLE_INTERRUPT))
|
|
intel_opregion_asle_intr(dev);
|
|
|
|
if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
|
|
gmbus_irq_handler(dev);
|
|
|
|
/* With MSI, interrupts are only generated when iir
|
|
* transitions from zero to nonzero. If another bit got
|
|
* set while we were handling the existing iir bits, then
|
|
* we would never get another interrupt.
|
|
*
|
|
* This is fine on non-MSI as well, as if we hit this path
|
|
* we avoid exiting the interrupt handler only to generate
|
|
* another one.
|
|
*
|
|
* Note that for MSI this could cause a stray interrupt report
|
|
* if an interrupt landed in the time between writing IIR and
|
|
* the posting read. This should be rare enough to never
|
|
* trigger the 99% of 100,000 interrupts test for disabling
|
|
* stray interrupts.
|
|
*/
|
|
iir = new_iir;
|
|
}
|
|
|
|
i915_update_dri1_breadcrumb(dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void i965_irq_uninstall(struct drm_device * dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
int pipe;
|
|
|
|
if (!dev_priv)
|
|
return;
|
|
|
|
I915_WRITE(PORT_HOTPLUG_EN, 0);
|
|
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
|
|
|
|
I915_WRITE(HWSTAM, 0xffffffff);
|
|
for_each_pipe(pipe)
|
|
I915_WRITE(PIPESTAT(pipe), 0);
|
|
I915_WRITE(IMR, 0xffffffff);
|
|
I915_WRITE(IER, 0x0);
|
|
|
|
for_each_pipe(pipe)
|
|
I915_WRITE(PIPESTAT(pipe),
|
|
I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
|
|
I915_WRITE(IIR, I915_READ(IIR));
|
|
}
|
|
|
|
static void i915_reenable_hotplug_timer_func(unsigned long data)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *)data;
|
|
struct drm_device *dev = dev_priv->dev;
|
|
struct drm_mode_config *mode_config = &dev->mode_config;
|
|
unsigned long irqflags;
|
|
int i;
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) {
|
|
struct drm_connector *connector;
|
|
|
|
if (dev_priv->hpd_stats[i].hpd_mark != HPD_DISABLED)
|
|
continue;
|
|
|
|
dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
|
|
|
|
list_for_each_entry(connector, &mode_config->connector_list, head) {
|
|
struct intel_connector *intel_connector = to_intel_connector(connector);
|
|
|
|
if (intel_connector->encoder->hpd_pin == i) {
|
|
if (connector->polled != intel_connector->polled)
|
|
DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
|
|
drm_get_connector_name(connector));
|
|
connector->polled = intel_connector->polled;
|
|
if (!connector->polled)
|
|
connector->polled = DRM_CONNECTOR_POLL_HPD;
|
|
}
|
|
}
|
|
}
|
|
if (dev_priv->display.hpd_irq_setup)
|
|
dev_priv->display.hpd_irq_setup(dev);
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
}
|
|
|
|
void intel_irq_init(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
|
|
INIT_WORK(&dev_priv->gpu_error.work, i915_error_work_func);
|
|
INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
|
|
INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
|
|
|
|
setup_timer(&dev_priv->hotplug_reenable_timer, i915_reenable_hotplug_timer_func,
|
|
(unsigned long) dev_priv);
|
|
|
|
|
|
// dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
|
|
|
|
if (IS_VALLEYVIEW(dev)) {
|
|
dev->driver->irq_handler = valleyview_irq_handler;
|
|
dev->driver->irq_preinstall = valleyview_irq_preinstall;
|
|
dev->driver->irq_postinstall = valleyview_irq_postinstall;
|
|
dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
|
|
} else if (HAS_PCH_SPLIT(dev)) {
|
|
dev->driver->irq_handler = ironlake_irq_handler;
|
|
dev->driver->irq_preinstall = ironlake_irq_preinstall;
|
|
dev->driver->irq_postinstall = ironlake_irq_postinstall;
|
|
dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
|
|
} else {
|
|
if (INTEL_INFO(dev)->gen == 2) {
|
|
} else if (INTEL_INFO(dev)->gen == 3) {
|
|
dev->driver->irq_preinstall = i915_irq_preinstall;
|
|
dev->driver->irq_postinstall = i915_irq_postinstall;
|
|
dev->driver->irq_handler = i915_irq_handler;
|
|
dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
|
|
} else {
|
|
dev->driver->irq_preinstall = i965_irq_preinstall;
|
|
dev->driver->irq_postinstall = i965_irq_postinstall;
|
|
dev->driver->irq_handler = i965_irq_handler;
|
|
dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
|
|
}
|
|
}
|
|
}
|
|
|
|
void intel_hpd_init(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct drm_mode_config *mode_config = &dev->mode_config;
|
|
struct drm_connector *connector;
|
|
unsigned long irqflags;
|
|
int i;
|
|
|
|
for (i = 1; i < HPD_NUM_PINS; i++) {
|
|
dev_priv->hpd_stats[i].hpd_cnt = 0;
|
|
dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
|
|
}
|
|
list_for_each_entry(connector, &mode_config->connector_list, head) {
|
|
struct intel_connector *intel_connector = to_intel_connector(connector);
|
|
connector->polled = intel_connector->polled;
|
|
if (!connector->polled && I915_HAS_HOTPLUG(dev) && intel_connector->encoder->hpd_pin > HPD_NONE)
|
|
connector->polled = DRM_CONNECTOR_POLL_HPD;
|
|
}
|
|
|
|
/* Interrupt setup is already guaranteed to be single-threaded, this is
|
|
* just to make the assert_spin_locked checks happy. */
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
if (dev_priv->display.hpd_irq_setup)
|
|
dev_priv->display.hpd_irq_setup(dev);
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
}
|
|
|
|
/* Disable interrupts so we can allow Package C8+. */
|
|
void hsw_pc8_disable_interrupts(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
unsigned long irqflags;
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
|
|
dev_priv->pc8.regsave.deimr = I915_READ(DEIMR);
|
|
dev_priv->pc8.regsave.sdeimr = I915_READ(SDEIMR);
|
|
dev_priv->pc8.regsave.gtimr = I915_READ(GTIMR);
|
|
dev_priv->pc8.regsave.gtier = I915_READ(GTIER);
|
|
dev_priv->pc8.regsave.gen6_pmimr = I915_READ(GEN6_PMIMR);
|
|
|
|
ironlake_disable_display_irq(dev_priv, ~DE_PCH_EVENT_IVB);
|
|
ibx_disable_display_interrupt(dev_priv, ~SDE_HOTPLUG_MASK_CPT);
|
|
ilk_disable_gt_irq(dev_priv, 0xffffffff);
|
|
snb_disable_pm_irq(dev_priv, 0xffffffff);
|
|
|
|
dev_priv->pc8.irqs_disabled = true;
|
|
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
}
|
|
|
|
/* Restore interrupts so we can recover from Package C8+. */
|
|
void hsw_pc8_restore_interrupts(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
unsigned long irqflags;
|
|
uint32_t val, expected;
|
|
|
|
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
|
|
|
|
val = I915_READ(DEIMR);
|
|
expected = ~DE_PCH_EVENT_IVB;
|
|
WARN(val != expected, "DEIMR is 0x%08x, not 0x%08x\n", val, expected);
|
|
|
|
val = I915_READ(SDEIMR) & ~SDE_HOTPLUG_MASK_CPT;
|
|
expected = ~SDE_HOTPLUG_MASK_CPT;
|
|
WARN(val != expected, "SDEIMR non-HPD bits are 0x%08x, not 0x%08x\n",
|
|
val, expected);
|
|
|
|
val = I915_READ(GTIMR);
|
|
expected = 0xffffffff;
|
|
WARN(val != expected, "GTIMR is 0x%08x, not 0x%08x\n", val, expected);
|
|
|
|
val = I915_READ(GEN6_PMIMR);
|
|
expected = 0xffffffff;
|
|
WARN(val != expected, "GEN6_PMIMR is 0x%08x, not 0x%08x\n", val,
|
|
expected);
|
|
|
|
dev_priv->pc8.irqs_disabled = false;
|
|
|
|
ironlake_enable_display_irq(dev_priv, ~dev_priv->pc8.regsave.deimr);
|
|
ibx_enable_display_interrupt(dev_priv,
|
|
~dev_priv->pc8.regsave.sdeimr &
|
|
~SDE_HOTPLUG_MASK_CPT);
|
|
ilk_enable_gt_irq(dev_priv, ~dev_priv->pc8.regsave.gtimr);
|
|
snb_enable_pm_irq(dev_priv, ~dev_priv->pc8.regsave.gen6_pmimr);
|
|
I915_WRITE(GTIER, dev_priv->pc8.regsave.gtier);
|
|
|
|
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
|
|
}
|
|
|
|
|
|
irqreturn_t intel_irq_handler(struct drm_device *dev)
|
|
{
|
|
|
|
// printf("i915 irq\n");
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// printf("device %p driver %p handler %p\n", dev, dev->driver, dev->driver->irq_handler) ;
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return dev->driver->irq_handler(0, dev);
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}
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