forked from KolibriOS/kolibrios
952 lines
24 KiB
C
952 lines
24 KiB
C
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#define iowrite32(v, addr) writel((v), (addr))
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#include "drmP.h"
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#include "drm.h"
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#include "i915_drm.h"
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#include "i915_drv.h"
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#include "intel_drv.h"
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <errno-base.h>
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#include <linux/pci.h>
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#include <syscall.h>
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#include "bitmap.h"
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typedef struct
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{
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kobj_t header;
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uint32_t *data;
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uint32_t hot_x;
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uint32_t hot_y;
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struct list_head list;
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struct drm_i915_gem_object *cobj;
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}cursor_t;
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#define CURSOR_WIDTH 64
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#define CURSOR_HEIGHT 64
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struct tag_display
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{
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int x;
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int y;
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int width;
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int height;
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int bpp;
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int vrefresh;
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int pitch;
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int lfb;
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int supported_modes;
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struct drm_device *ddev;
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struct drm_connector *connector;
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struct drm_crtc *crtc;
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struct list_head cursors;
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cursor_t *cursor;
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int (*init_cursor)(cursor_t*);
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cursor_t* (__stdcall *select_cursor)(cursor_t*);
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void (*show_cursor)(int show);
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void (__stdcall *move_cursor)(cursor_t *cursor, int x, int y);
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void (__stdcall *restore_cursor)(int x, int y);
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void (*disable_mouse)(void);
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u32 mask_seqno;
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u32 check_mouse;
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u32 check_m_pixel;
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};
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static display_t *os_display;
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u32_t cmd_buffer;
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u32_t cmd_offset;
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void init_render();
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int sna_init();
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int init_cursor(cursor_t *cursor);
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static cursor_t* __stdcall select_cursor_kms(cursor_t *cursor);
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static void __stdcall move_cursor_kms(cursor_t *cursor, int x, int y);
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void __stdcall restore_cursor(int x, int y)
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{};
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void disable_mouse(void)
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{};
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static char *manufacturer_name(unsigned char *x)
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{
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static char name[4];
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name[0] = ((x[0] & 0x7C) >> 2) + '@';
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name[1] = ((x[0] & 0x03) << 3) + ((x[1] & 0xE0) >> 5) + '@';
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name[2] = (x[1] & 0x1F) + '@';
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name[3] = 0;
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return name;
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}
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bool set_mode(struct drm_device *dev, struct drm_connector *connector,
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videomode_t *reqmode, bool strict)
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{
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drm_i915_private_t *dev_priv = dev->dev_private;
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struct drm_fb_helper *fb_helper = &dev_priv->fbdev->helper;
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struct drm_mode_config *config = &dev->mode_config;
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struct drm_display_mode *mode = NULL, *tmpmode;
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struct drm_framebuffer *fb = NULL;
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struct drm_crtc *crtc;
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struct drm_encoder *encoder;
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struct drm_mode_set set;
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char *con_name;
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char *enc_name;
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unsigned hdisplay, vdisplay;
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int ret;
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mutex_lock(&dev->mode_config.mutex);
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list_for_each_entry(tmpmode, &connector->modes, head)
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{
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if( (drm_mode_width(tmpmode) == reqmode->width) &&
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(drm_mode_height(tmpmode) == reqmode->height) &&
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(drm_mode_vrefresh(tmpmode) == reqmode->freq) )
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{
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mode = tmpmode;
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goto do_set;
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}
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};
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if( (mode == NULL) && (strict == false) )
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{
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list_for_each_entry(tmpmode, &connector->modes, head)
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{
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if( (drm_mode_width(tmpmode) == reqmode->width) &&
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(drm_mode_height(tmpmode) == reqmode->height) )
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{
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mode = tmpmode;
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goto do_set;
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}
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};
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};
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DRM_ERROR("%s failed\n", __FUNCTION__);
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return -1;
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do_set:
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encoder = connector->encoder;
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crtc = encoder->crtc;
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con_name = drm_get_connector_name(connector);
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enc_name = drm_get_encoder_name(encoder);
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DRM_DEBUG_KMS("set mode %d %d: crtc %d connector %s encoder %s\n",
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reqmode->width, reqmode->height, crtc->base.id,
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con_name, enc_name);
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drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
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hdisplay = mode->hdisplay;
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vdisplay = mode->vdisplay;
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if (crtc->invert_dimensions)
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swap(hdisplay, vdisplay);
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fb = fb_helper->fb;
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fb->width = reqmode->width;
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fb->height = reqmode->height;
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fb->pitches[0] = ALIGN(reqmode->width * 4, 64);
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fb->pitches[1] = ALIGN(reqmode->width * 4, 64);
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fb->pitches[2] = ALIGN(reqmode->width * 4, 64);
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fb->pitches[3] = ALIGN(reqmode->width * 4, 64);
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fb->bits_per_pixel = 32;
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fb->depth = 24;
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crtc->fb = fb;
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crtc->enabled = true;
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os_display->crtc = crtc;
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set.crtc = crtc;
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set.x = 0;
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set.y = 0;
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set.mode = mode;
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set.connectors = &connector;
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set.num_connectors = 1;
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set.fb = fb;
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ret = crtc->funcs->set_config(&set);
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mutex_unlock(&dev->mode_config.mutex);
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if ( !ret )
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{
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os_display->width = fb->width;
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os_display->height = fb->height;
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os_display->pitch = fb->pitches[0];
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os_display->vrefresh = drm_mode_vrefresh(mode);
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sysSetScreen(fb->width, fb->height, fb->pitches[0]);
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DRM_DEBUG_KMS("new mode %d x %d pitch %d\n",
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fb->width, fb->height, fb->pitches[0]);
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}
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else
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DRM_ERROR("failed to set mode %d_%d on crtc %p\n",
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fb->width, fb->height, crtc);
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return ret;
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}
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static int count_connector_modes(struct drm_connector* connector)
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{
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struct drm_display_mode *mode;
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int count = 0;
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list_for_each_entry(mode, &connector->modes, head)
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{
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count++;
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};
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return count;
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};
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static struct drm_connector* get_def_connector(struct drm_device *dev)
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{
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struct drm_connector *connector;
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struct drm_connector_helper_funcs *connector_funcs;
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struct drm_connector *def_connector = NULL;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head)
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{
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struct drm_encoder *encoder;
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struct drm_crtc *crtc;
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if( connector->status != connector_status_connected)
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continue;
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connector_funcs = connector->helper_private;
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encoder = connector_funcs->best_encoder(connector);
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if( encoder == NULL)
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continue;
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connector->encoder = encoder;
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crtc = encoder->crtc;
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DRM_DEBUG_KMS("CONNECTOR %x ID: %d status %d encoder %x\n crtc %x",
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connector, connector->base.id,
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connector->status, connector->encoder,
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crtc);
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// if (crtc == NULL)
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// continue;
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def_connector = connector;
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break;
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};
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return def_connector;
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};
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int init_display_kms(struct drm_device *dev)
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{
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struct drm_connector *connector;
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struct drm_connector_helper_funcs *connector_funcs;
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struct drm_encoder *encoder;
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struct drm_crtc *crtc = NULL;
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struct drm_framebuffer *fb;
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cursor_t *cursor;
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u32_t ifl;
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int err;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head)
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{
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if( connector->status != connector_status_connected)
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continue;
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connector_funcs = connector->helper_private;
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encoder = connector_funcs->best_encoder(connector);
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if( encoder == NULL)
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{
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DRM_DEBUG_KMS("CONNECTOR %x ID: %d no active encoders\n",
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connector, connector->base.id);
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continue;
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}
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connector->encoder = encoder;
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crtc = encoder->crtc;
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DRM_DEBUG_KMS("CONNECTOR %x ID:%d status:%d ENCODER %x CRTC %x ID:%d\n",
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connector, connector->base.id,
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connector->status, connector->encoder,
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crtc, crtc->base.id );
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break;
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};
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if(connector == NULL)
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{
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DRM_ERROR("No active connectors!\n");
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return -1;
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};
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if(crtc == NULL)
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{
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struct drm_crtc *tmp_crtc;
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int crtc_mask = 1;
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list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head)
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{
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if (encoder->possible_crtcs & crtc_mask)
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{
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crtc = tmp_crtc;
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encoder->crtc = crtc;
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break;
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};
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crtc_mask <<= 1;
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};
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};
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if(crtc == NULL)
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{
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DRM_ERROR("No CRTC for encoder %d\n", encoder->base.id);
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return -1;
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};
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DRM_DEBUG_KMS("[Select CRTC:%d]\n", crtc->base.id);
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os_display = GetDisplay();
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os_display->ddev = dev;
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os_display->connector = connector;
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os_display->crtc = crtc;
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os_display->supported_modes = count_connector_modes(connector);
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ifl = safe_cli();
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{
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struct intel_crtc *intel_crtc = to_intel_crtc(os_display->crtc);
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list_for_each_entry(cursor, &os_display->cursors, list)
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{
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init_cursor(cursor);
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};
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os_display->restore_cursor(0,0);
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os_display->init_cursor = init_cursor;
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os_display->select_cursor = select_cursor_kms;
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os_display->show_cursor = NULL;
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os_display->move_cursor = move_cursor_kms;
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os_display->restore_cursor = restore_cursor;
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os_display->disable_mouse = disable_mouse;
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intel_crtc->cursor_x = os_display->width/2;
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intel_crtc->cursor_y = os_display->height/2;
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select_cursor_kms(os_display->cursor);
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};
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safe_sti(ifl);
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#ifdef __HWA__
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err = init_bitmaps();
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#endif
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return 0;
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};
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int get_videomodes(videomode_t *mode, int *count)
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{
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int err = -1;
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// dbgprintf("mode %x count %d\n", mode, *count);
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if( *count == 0 )
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{
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*count = os_display->supported_modes;
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err = 0;
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}
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else if( mode != NULL )
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{
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struct drm_display_mode *drmmode;
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int i = 0;
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if( *count > os_display->supported_modes)
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*count = os_display->supported_modes;
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list_for_each_entry(drmmode, &os_display->connector->modes, head)
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{
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if( i < *count)
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{
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mode->width = drm_mode_width(drmmode);
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mode->height = drm_mode_height(drmmode);
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mode->bpp = 32;
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mode->freq = drm_mode_vrefresh(drmmode);
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i++;
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mode++;
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}
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else break;
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};
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*count = i;
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err = 0;
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};
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return err;
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};
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int set_user_mode(videomode_t *mode)
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{
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int err = -1;
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// dbgprintf("width %d height %d vrefresh %d\n",
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// mode->width, mode->height, mode->freq);
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if( (mode->width != 0) &&
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(mode->height != 0) &&
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(mode->freq != 0 ) &&
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( (mode->width != os_display->width) ||
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(mode->height != os_display->height) ||
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(mode->freq != os_display->vrefresh) ) )
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{
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if( set_mode(os_display->ddev, os_display->connector, mode, true) )
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err = 0;
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};
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return err;
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};
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void __attribute__((regparm(1))) destroy_cursor(cursor_t *cursor)
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{
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list_del(&cursor->list);
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i915_gem_object_unpin(cursor->cobj);
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mutex_lock(&main_device->struct_mutex);
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drm_gem_object_unreference(&cursor->cobj->base);
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mutex_unlock(&main_device->struct_mutex);
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__DestroyObject(cursor);
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};
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int init_cursor(cursor_t *cursor)
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{
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struct drm_i915_private *dev_priv = os_display->ddev->dev_private;
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struct drm_i915_gem_object *obj;
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uint32_t *bits;
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uint32_t *src;
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void *mapped;
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int i,j;
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int ret;
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if (dev_priv->info->cursor_needs_physical)
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{
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bits = (uint32_t*)KernelAlloc(CURSOR_WIDTH*CURSOR_HEIGHT*4);
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if (unlikely(bits == NULL))
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return ENOMEM;
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cursor->cobj = (struct drm_i915_gem_object *)GetPgAddr(bits);
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}
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else
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{
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obj = i915_gem_alloc_object(os_display->ddev, CURSOR_WIDTH*CURSOR_HEIGHT*4);
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if (unlikely(obj == NULL))
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return -ENOMEM;
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ret = i915_gem_obj_ggtt_pin(obj, CURSOR_WIDTH*CURSOR_HEIGHT*4, true, true);
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if (ret) {
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drm_gem_object_unreference(&obj->base);
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return ret;
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}
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ret = i915_gem_object_set_to_gtt_domain(obj, true);
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if (ret)
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{
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i915_gem_object_unpin(obj);
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drm_gem_object_unreference(&obj->base);
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return ret;
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}
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/* You don't need to worry about fragmentation issues.
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* GTT space is continuous. I guarantee it. */
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mapped = bits = (u32*)MapIoMem(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
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CURSOR_WIDTH*CURSOR_HEIGHT*4, PG_SW);
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if (unlikely(bits == NULL))
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{
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i915_gem_object_unpin(obj);
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drm_gem_object_unreference(&obj->base);
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return -ENOMEM;
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};
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cursor->cobj = obj;
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};
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src = cursor->data;
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for(i = 0; i < 32; i++)
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{
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for(j = 0; j < 32; j++)
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*bits++ = *src++;
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for(j = 32; j < CURSOR_WIDTH; j++)
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*bits++ = 0;
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}
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for(i = 0; i < CURSOR_WIDTH*(CURSOR_HEIGHT-32); i++)
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*bits++ = 0;
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FreeKernelSpace(mapped);
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// release old cursor
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KernelFree(cursor->data);
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cursor->data = bits;
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cursor->header.destroy = destroy_cursor;
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return 0;
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}
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static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base)
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{
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struct drm_device *dev = crtc->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
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int pipe = intel_crtc->pipe;
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bool visible = base != 0;
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if (intel_crtc->cursor_visible != visible) {
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uint32_t cntl = I915_READ(CURCNTR(pipe));
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if (base) {
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cntl &= ~(CURSOR_MODE | MCURSOR_PIPE_SELECT);
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cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
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cntl |= pipe << 28; /* Connect to correct pipe */
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} else {
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cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
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cntl |= CURSOR_MODE_DISABLE;
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}
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I915_WRITE(CURCNTR(pipe), cntl);
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intel_crtc->cursor_visible = visible;
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}
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/* and commit changes on next vblank */
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I915_WRITE(CURBASE(pipe), base);
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}
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void __stdcall move_cursor_kms(cursor_t *cursor, int x, int y)
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{
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struct drm_i915_private *dev_priv = os_display->ddev->dev_private;
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struct intel_crtc *intel_crtc = to_intel_crtc(os_display->crtc);
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u32 base, pos;
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bool visible;
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int pipe = intel_crtc->pipe;
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intel_crtc->cursor_x = x;
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intel_crtc->cursor_y = y;
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x = x - cursor->hot_x;
|
|
y = y - cursor->hot_y;
|
|
|
|
|
|
pos = 0;
|
|
|
|
base = intel_crtc->cursor_addr;
|
|
if (x >= os_display->width)
|
|
base = 0;
|
|
|
|
if (y >= os_display->height)
|
|
base = 0;
|
|
|
|
if (x < 0)
|
|
{
|
|
if (x + intel_crtc->cursor_width < 0)
|
|
base = 0;
|
|
|
|
pos |= CURSOR_POS_SIGN << CURSOR_X_SHIFT;
|
|
x = -x;
|
|
}
|
|
pos |= x << CURSOR_X_SHIFT;
|
|
|
|
if (y < 0)
|
|
{
|
|
if (y + intel_crtc->cursor_height < 0)
|
|
base = 0;
|
|
|
|
pos |= CURSOR_POS_SIGN << CURSOR_Y_SHIFT;
|
|
y = -y;
|
|
}
|
|
pos |= y << CURSOR_Y_SHIFT;
|
|
|
|
visible = base != 0;
|
|
if (!visible && !intel_crtc->cursor_visible)
|
|
return;
|
|
|
|
I915_WRITE(CURPOS(pipe), pos);
|
|
// if (IS_845G(dev) || IS_I865G(dev))
|
|
// i845_update_cursor(crtc, base);
|
|
// else
|
|
i9xx_update_cursor(os_display->crtc, base);
|
|
|
|
};
|
|
|
|
|
|
cursor_t* __stdcall select_cursor_kms(cursor_t *cursor)
|
|
{
|
|
struct drm_i915_private *dev_priv = os_display->ddev->dev_private;
|
|
struct intel_crtc *intel_crtc = to_intel_crtc(os_display->crtc);
|
|
cursor_t *old;
|
|
|
|
old = os_display->cursor;
|
|
os_display->cursor = cursor;
|
|
|
|
if (!dev_priv->info->cursor_needs_physical)
|
|
intel_crtc->cursor_addr = i915_gem_obj_ggtt_offset(cursor->cobj);
|
|
else
|
|
intel_crtc->cursor_addr = (addr_t)cursor->cobj;
|
|
|
|
intel_crtc->cursor_width = 32;
|
|
intel_crtc->cursor_height = 32;
|
|
|
|
move_cursor_kms(cursor, intel_crtc->cursor_x, intel_crtc->cursor_y);
|
|
return old;
|
|
};
|
|
|
|
struct sna_fb
|
|
{
|
|
uint32_t width;
|
|
uint32_t height;
|
|
uint32_t pitch;
|
|
uint32_t tiling;
|
|
};
|
|
|
|
int i915_fbinfo(struct sna_fb *fb)
|
|
{
|
|
fb->width = os_display->width;
|
|
fb->height = os_display->height;
|
|
fb->pitch = os_display->pitch;
|
|
fb->tiling = 0;
|
|
|
|
return 0;
|
|
};
|
|
|
|
typedef struct
|
|
{
|
|
int left;
|
|
int top;
|
|
int right;
|
|
int bottom;
|
|
}rect_t;
|
|
|
|
struct drm_i915_mask {
|
|
__u32 handle;
|
|
__u32 width;
|
|
__u32 height;
|
|
__u32 bo_size;
|
|
__u32 bo_pitch;
|
|
__u32 bo_map;
|
|
};
|
|
|
|
#define CURRENT_TASK (0x80003000)
|
|
|
|
static u32_t get_display_map()
|
|
{
|
|
u32_t addr;
|
|
|
|
addr = (u32_t)os_display;
|
|
addr+= sizeof(display_t); /* shoot me */
|
|
return *(u32_t*)addr;
|
|
}
|
|
|
|
void FASTCALL GetWindowRect(rect_t *rc)__asm__("GetWindowRect");
|
|
|
|
int i915_mask_update(struct drm_device *dev, void *data,
|
|
struct drm_file *file)
|
|
{
|
|
struct drm_i915_mask *mask = data;
|
|
struct drm_gem_object *obj;
|
|
static unsigned int mask_seqno[256];
|
|
rect_t winrc;
|
|
u32 slot;
|
|
int ret;
|
|
|
|
if(mask->handle == -2)
|
|
{
|
|
printf("%s handle %d\n", __FUNCTION__, mask->handle);
|
|
return 0;
|
|
}
|
|
|
|
obj = drm_gem_object_lookup(dev, file, mask->handle);
|
|
if (obj == NULL)
|
|
return -ENOENT;
|
|
|
|
if (!obj->filp) {
|
|
drm_gem_object_unreference_unlocked(obj);
|
|
return -EINVAL;
|
|
}
|
|
|
|
GetWindowRect(&winrc);
|
|
{
|
|
// static warn_count;
|
|
|
|
mask->width = winrc.right - winrc.left + 1;
|
|
mask->height = winrc.bottom - winrc.top + 1;
|
|
mask->bo_pitch = (mask->width+15) & ~15;
|
|
|
|
#if 0
|
|
if(warn_count < 1)
|
|
{
|
|
printf("left %d top %d right %d bottom %d\n",
|
|
winrc.left, winrc.top, winrc.right, winrc.bottom);
|
|
printf("mask pitch %d data %p\n", mask->bo_pitch, mask->bo_size);
|
|
warn_count++;
|
|
};
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
slot = *((u8*)CURRENT_TASK);
|
|
|
|
if( mask_seqno[slot] != os_display->mask_seqno)
|
|
{
|
|
u8* src_offset;
|
|
u8* dst_offset;
|
|
u32 ifl;
|
|
|
|
ret = i915_mutex_lock_interruptible(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = i915_gem_object_set_to_cpu_domain(to_intel_bo(obj), true);
|
|
if(ret !=0 )
|
|
{
|
|
dbgprintf("%s fail\n", __FUNCTION__);
|
|
return ret;
|
|
};
|
|
|
|
// printf("width %d height %d\n", winrc.right, winrc.bottom);
|
|
|
|
// slot = 0x01;
|
|
|
|
|
|
src_offset = (u8*)( winrc.top*os_display->width + winrc.left);
|
|
src_offset+= get_display_map();
|
|
dst_offset = (u8*)mask->bo_map;
|
|
|
|
u32_t tmp_h = mask->height;
|
|
|
|
ifl = safe_cli();
|
|
{
|
|
mask_seqno[slot] = os_display->mask_seqno;
|
|
|
|
slot|= (slot<<8)|(slot<<16)|(slot<<24);
|
|
|
|
__asm__ __volatile__ (
|
|
"movd %[slot], %%xmm6 \n"
|
|
"punpckldq %%xmm6, %%xmm6 \n"
|
|
"punpcklqdq %%xmm6, %%xmm6 \n"
|
|
:: [slot] "m" (slot)
|
|
:"xmm6");
|
|
|
|
while( tmp_h--)
|
|
{
|
|
int tmp_w = mask->bo_pitch;
|
|
|
|
u8* tmp_src = src_offset;
|
|
u8* tmp_dst = dst_offset;
|
|
|
|
src_offset+= os_display->width;
|
|
dst_offset+= mask->bo_pitch;
|
|
|
|
while(tmp_w >= 64)
|
|
{
|
|
__asm__ __volatile__ (
|
|
"movdqu (%0), %%xmm0 \n"
|
|
"movdqu 16(%0), %%xmm1 \n"
|
|
"movdqu 32(%0), %%xmm2 \n"
|
|
"movdqu 48(%0), %%xmm3 \n"
|
|
"pcmpeqb %%xmm6, %%xmm0 \n"
|
|
"pcmpeqb %%xmm6, %%xmm1 \n"
|
|
"pcmpeqb %%xmm6, %%xmm2 \n"
|
|
"pcmpeqb %%xmm6, %%xmm3 \n"
|
|
"movdqa %%xmm0, (%%edi) \n"
|
|
"movdqa %%xmm1, 16(%%edi) \n"
|
|
"movdqa %%xmm2, 32(%%edi) \n"
|
|
"movdqa %%xmm3, 48(%%edi) \n"
|
|
|
|
:: "r" (tmp_src), "D" (tmp_dst)
|
|
:"xmm0","xmm1","xmm2","xmm3");
|
|
tmp_w -= 64;
|
|
tmp_src += 64;
|
|
tmp_dst += 64;
|
|
}
|
|
|
|
if( tmp_w >= 32 )
|
|
{
|
|
__asm__ __volatile__ (
|
|
"movdqu (%0), %%xmm0 \n"
|
|
"movdqu 16(%0), %%xmm1 \n"
|
|
"pcmpeqb %%xmm6, %%xmm0 \n"
|
|
"pcmpeqb %%xmm6, %%xmm1 \n"
|
|
"movdqa %%xmm0, (%%edi) \n"
|
|
"movdqa %%xmm1, 16(%%edi) \n"
|
|
|
|
:: "r" (tmp_src), "D" (tmp_dst)
|
|
:"xmm0","xmm1");
|
|
tmp_w -= 32;
|
|
tmp_src += 32;
|
|
tmp_dst += 32;
|
|
}
|
|
|
|
while( tmp_w > 0 )
|
|
{
|
|
__asm__ __volatile__ (
|
|
"movdqu (%0), %%xmm0 \n"
|
|
"pcmpeqb %%xmm6, %%xmm0 \n"
|
|
"movdqa %%xmm0, (%%edi) \n"
|
|
:: "r" (tmp_src), "D" (tmp_dst)
|
|
:"xmm0");
|
|
tmp_w -= 16;
|
|
tmp_src += 16;
|
|
tmp_dst += 16;
|
|
}
|
|
};
|
|
};
|
|
safe_sti(ifl);
|
|
}
|
|
|
|
drm_gem_object_unreference(obj);
|
|
|
|
mutex_unlock(&dev->struct_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#define NSEC_PER_SEC 1000000000L
|
|
|
|
void getrawmonotonic(struct timespec *ts)
|
|
{
|
|
u32 tmp = GetTimerTicks();
|
|
|
|
ts->tv_sec = tmp/100;
|
|
ts->tv_nsec = (tmp - ts->tv_sec*100)*10000000;
|
|
}
|
|
|
|
void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec)
|
|
{
|
|
while (nsec >= NSEC_PER_SEC) {
|
|
/*
|
|
* The following asm() prevents the compiler from
|
|
* optimising this loop into a modulo operation. See
|
|
* also __iter_div_u64_rem() in include/linux/time.h
|
|
*/
|
|
asm("" : "+rm"(nsec));
|
|
nsec -= NSEC_PER_SEC;
|
|
++sec;
|
|
}
|
|
while (nsec < 0) {
|
|
asm("" : "+rm"(nsec));
|
|
nsec += NSEC_PER_SEC;
|
|
--sec;
|
|
}
|
|
ts->tv_sec = sec;
|
|
ts->tv_nsec = nsec;
|
|
}
|
|
|
|
void
|
|
prepare_to_wait(wait_queue_head_t *q, wait_queue_t *wait, int state)
|
|
{
|
|
unsigned long flags;
|
|
|
|
// wait->flags &= ~WQ_FLAG_EXCLUSIVE;
|
|
spin_lock_irqsave(&q->lock, flags);
|
|
if (list_empty(&wait->task_list))
|
|
__add_wait_queue(q, wait);
|
|
spin_unlock_irqrestore(&q->lock, flags);
|
|
}
|
|
|
|
/**
|
|
* finish_wait - clean up after waiting in a queue
|
|
* @q: waitqueue waited on
|
|
* @wait: wait descriptor
|
|
*
|
|
* Sets current thread back to running state and removes
|
|
* the wait descriptor from the given waitqueue if still
|
|
* queued.
|
|
*/
|
|
void finish_wait(wait_queue_head_t *q, wait_queue_t *wait)
|
|
{
|
|
unsigned long flags;
|
|
|
|
// __set_current_state(TASK_RUNNING);
|
|
/*
|
|
* We can check for list emptiness outside the lock
|
|
* IFF:
|
|
* - we use the "careful" check that verifies both
|
|
* the next and prev pointers, so that there cannot
|
|
* be any half-pending updates in progress on other
|
|
* CPU's that we haven't seen yet (and that might
|
|
* still change the stack area.
|
|
* and
|
|
* - all other users take the lock (ie we can only
|
|
* have _one_ other CPU that looks at or modifies
|
|
* the list).
|
|
*/
|
|
if (!list_empty_careful(&wait->task_list)) {
|
|
spin_lock_irqsave(&q->lock, flags);
|
|
list_del_init(&wait->task_list);
|
|
spin_unlock_irqrestore(&q->lock, flags);
|
|
}
|
|
|
|
DestroyEvent(wait->evnt);
|
|
}
|
|
|
|
int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key)
|
|
{
|
|
list_del_init(&wait->task_list);
|
|
return 1;
|
|
}
|
|
|
|
unsigned int hweight16(unsigned int w)
|
|
{
|
|
unsigned int res = w - ((w >> 1) & 0x5555);
|
|
res = (res & 0x3333) + ((res >> 2) & 0x3333);
|
|
res = (res + (res >> 4)) & 0x0F0F;
|
|
return (res + (res >> 8)) & 0x00FF;
|
|
}
|
|
|
|
|
|
unsigned long round_jiffies_up_relative(unsigned long j)
|
|
{
|
|
unsigned long j0 = GetTimerTicks();
|
|
|
|
/* Use j0 because jiffies might change while we run */
|
|
return round_jiffies_common(j + j0, true) - j0;
|
|
}
|
|
|
|
|