207 lines
6.0 KiB
C
207 lines
6.0 KiB
C
/*
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* Copyright 2008 Advanced Micro Devices, Inc.
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* Copyright 2008 Red Hat Inc.
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* Copyright 2009 Jerome Glisse.
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Dave Airlie
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* Alex Deucher
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* Jerome Glisse
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*/
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#include <drm/drmP.h>
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#include "radeon.h"
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#include <drm/radeon_drm.h>
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#include "radeon_asic.h"
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#include <linux/vga_switcheroo.h>
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#include <linux/slab.h>
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#include <linux/pm_runtime.h>
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#include "radeon_kfd.h"
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#if defined(CONFIG_VGA_SWITCHEROO)
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bool radeon_has_atpx(void);
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#else
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static inline bool radeon_has_atpx(void) { return false; }
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#endif
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/*
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* VBlank related functions.
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*/
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/**
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* radeon_get_vblank_counter_kms - get frame count
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*
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* @dev: drm dev pointer
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* @pipe: crtc to get the frame count from
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*
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* Gets the frame count on the requested crtc (all asics).
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* Returns frame count on success, -EINVAL on failure.
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*/
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u32 radeon_get_vblank_counter_kms(struct drm_device *dev, unsigned int pipe)
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{
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int vpos, hpos, stat;
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u32 count;
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struct radeon_device *rdev = dev->dev_private;
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if (pipe >= rdev->num_crtc) {
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DRM_ERROR("Invalid crtc %u\n", pipe);
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return -EINVAL;
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}
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/* The hw increments its frame counter at start of vsync, not at start
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* of vblank, as is required by DRM core vblank counter handling.
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* Cook the hw count here to make it appear to the caller as if it
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* incremented at start of vblank. We measure distance to start of
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* vblank in vpos. vpos therefore will be >= 0 between start of vblank
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* and start of vsync, so vpos >= 0 means to bump the hw frame counter
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* result by 1 to give the proper appearance to caller.
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*/
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if (rdev->mode_info.crtcs[pipe]) {
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/* Repeat readout if needed to provide stable result if
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* we cross start of vsync during the queries.
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*/
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do {
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count = radeon_get_vblank_counter(rdev, pipe);
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/* Ask radeon_get_crtc_scanoutpos to return vpos as
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* distance to start of vblank, instead of regular
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* vertical scanout pos.
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*/
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stat = radeon_get_crtc_scanoutpos(
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dev, pipe, GET_DISTANCE_TO_VBLANKSTART,
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&vpos, &hpos, NULL, NULL,
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&rdev->mode_info.crtcs[pipe]->base.hwmode);
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} while (count != radeon_get_vblank_counter(rdev, pipe));
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if (((stat & (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE)) !=
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(DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE))) {
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DRM_DEBUG_VBL("Query failed! stat %d\n", stat);
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}
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else {
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DRM_DEBUG_VBL("crtc %u: dist from vblank start %d\n",
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pipe, vpos);
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/* Bump counter if we are at >= leading edge of vblank,
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* but before vsync where vpos would turn negative and
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* the hw counter really increments.
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*/
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if (vpos >= 0)
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count++;
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}
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}
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else {
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/* Fallback to use value as is. */
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count = radeon_get_vblank_counter(rdev, pipe);
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DRM_DEBUG_VBL("NULL mode info! Returned count may be wrong.\n");
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}
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return count;
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}
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/**
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* radeon_enable_vblank_kms - enable vblank interrupt
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*
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* @dev: drm dev pointer
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* @crtc: crtc to enable vblank interrupt for
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*
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* Enable the interrupt on the requested crtc (all asics).
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* Returns 0 on success, -EINVAL on failure.
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*/
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int radeon_enable_vblank_kms(struct drm_device *dev, int crtc)
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{
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struct radeon_device *rdev = dev->dev_private;
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unsigned long irqflags;
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int r;
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if (crtc < 0 || crtc >= rdev->num_crtc) {
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DRM_ERROR("Invalid crtc %d\n", crtc);
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return -EINVAL;
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}
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spin_lock_irqsave(&rdev->irq.lock, irqflags);
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rdev->irq.crtc_vblank_int[crtc] = true;
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r = radeon_irq_set(rdev);
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spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
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return r;
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}
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/**
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* radeon_disable_vblank_kms - disable vblank interrupt
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*
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* @dev: drm dev pointer
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* @crtc: crtc to disable vblank interrupt for
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*
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* Disable the interrupt on the requested crtc (all asics).
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*/
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void radeon_disable_vblank_kms(struct drm_device *dev, int crtc)
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{
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struct radeon_device *rdev = dev->dev_private;
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unsigned long irqflags;
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if (crtc < 0 || crtc >= rdev->num_crtc) {
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DRM_ERROR("Invalid crtc %d\n", crtc);
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return;
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}
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spin_lock_irqsave(&rdev->irq.lock, irqflags);
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rdev->irq.crtc_vblank_int[crtc] = false;
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radeon_irq_set(rdev);
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spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
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}
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/**
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* radeon_get_vblank_timestamp_kms - get vblank timestamp
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*
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* @dev: drm dev pointer
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* @crtc: crtc to get the timestamp for
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* @max_error: max error
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* @vblank_time: time value
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* @flags: flags passed to the driver
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*
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* Gets the timestamp on the requested crtc based on the
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* scanout position. (all asics).
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* Returns postive status flags on success, negative error on failure.
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*/
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int radeon_get_vblank_timestamp_kms(struct drm_device *dev, int crtc,
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int *max_error,
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struct timeval *vblank_time,
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unsigned flags)
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{
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struct drm_crtc *drmcrtc;
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struct radeon_device *rdev = dev->dev_private;
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if (crtc < 0 || crtc >= dev->num_crtcs) {
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DRM_ERROR("Invalid crtc %d\n", crtc);
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return -EINVAL;
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}
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/* Get associated drm_crtc: */
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drmcrtc = &rdev->mode_info.crtcs[crtc]->base;
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if (!drmcrtc)
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return -EINVAL;
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/* Helper routine in DRM core does all the work: */
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return drm_calc_vbltimestamp_from_scanoutpos(dev, crtc, max_error,
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vblank_time, flags,
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&drmcrtc->hwmode);
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}
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