drm/radeon/kms: improve pflip precision on r1xx-r4xx

[pandora-kernel.git] / drivers / gpu / drm / radeon / r100.c

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 8e10aa9..300b4a6 100644 (file)
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -68,6 +68,56 @@ MODULE_FIRMWARE(FIRMWARE_R520);
  * r100,rv100,rs100,rv200,rs200,r200,rv250,rs300,rv280
  */
 
+void r100_pre_page_flip(struct radeon_device *rdev, int crtc)
+{
+       struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc];
+       u32 tmp;
+
+       /* make sure flip is at vb rather than hb */
+       tmp = RREG32(RADEON_CRTC_OFFSET_CNTL + radeon_crtc->crtc_offset);
+       tmp &= ~RADEON_CRTC_OFFSET_FLIP_CNTL;
+       /* make sure pending bit is asserted */
+       tmp |= RADEON_CRTC_GUI_TRIG_OFFSET_LEFT_EN;
+       WREG32(RADEON_CRTC_OFFSET_CNTL + radeon_crtc->crtc_offset, tmp);
+
+       /* set pageflip to happen as late as possible in the vblank interval.
+        * same field for crtc1/2
+        */
+       tmp = RREG32(RADEON_CRTC_GEN_CNTL);
+       tmp &= ~RADEON_CRTC_VSTAT_MODE_MASK;
+       WREG32(RADEON_CRTC_GEN_CNTL, tmp);
+
+       /* enable the pflip int */
+       radeon_irq_kms_pflip_irq_get(rdev, crtc);
+}
+
+void r100_post_page_flip(struct radeon_device *rdev, int crtc)
+{
+       /* disable the pflip int */
+       radeon_irq_kms_pflip_irq_put(rdev, crtc);
+}
+
+u32 r100_page_flip(struct radeon_device *rdev, int crtc_id, u64 crtc_base)
+{
+       struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc_id];
+       u32 tmp = ((u32)crtc_base) | RADEON_CRTC_OFFSET__OFFSET_LOCK;
+
+       /* Lock the graphics update lock */
+       /* update the scanout addresses */
+       WREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset, tmp);
+
+       /* Wait for update_pending to go high. */
+       while (!(RREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset) & RADEON_CRTC_OFFSET__GUI_TRIG_OFFSET));
+       DRM_DEBUG("Update pending now high. Unlocking vupdate_lock.\n");
+
+       /* Unlock the lock, so double-buffering can take place inside vblank */
+       tmp &= ~RADEON_CRTC_OFFSET__OFFSET_LOCK;
+       WREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset, tmp);
+
+       /* Return current update_pending status: */
+       return RREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset) & RADEON_CRTC_OFFSET__GUI_TRIG_OFFSET;
+}
+
 void r100_pm_get_dynpm_state(struct radeon_device *rdev)
 {
        int i;
@@ -526,10 +576,12 @@ int r100_irq_set(struct radeon_device *rdev)
        if (rdev->irq.gui_idle) {
                tmp |= RADEON_GUI_IDLE_MASK;
        }
-       if (rdev->irq.crtc_vblank_int[0]) {
+       if (rdev->irq.crtc_vblank_int[0] ||
+           rdev->irq.pflip[0]) {
                tmp |= RADEON_CRTC_VBLANK_MASK;
        }
-       if (rdev->irq.crtc_vblank_int[1]) {
+       if (rdev->irq.crtc_vblank_int[1] ||
+           rdev->irq.pflip[1]) {
                tmp |= RADEON_CRTC2_VBLANK_MASK;
        }
        if (rdev->irq.hpd[0]) {
@@ -600,14 +652,22 @@ int r100_irq_process(struct radeon_device *rdev)
                }
                /* Vertical blank interrupts */
                if (status & RADEON_CRTC_VBLANK_STAT) {
-                       drm_handle_vblank(rdev->ddev, 0);
-                       rdev->pm.vblank_sync = true;
-                       wake_up(&rdev->irq.vblank_queue);
+                       if (rdev->irq.crtc_vblank_int[0]) {
+                               drm_handle_vblank(rdev->ddev, 0);
+                               rdev->pm.vblank_sync = true;
+                               wake_up(&rdev->irq.vblank_queue);
+                       }
+                       if (rdev->irq.pflip[0])
+                               radeon_crtc_handle_flip(rdev, 0);
                }
                if (status & RADEON_CRTC2_VBLANK_STAT) {
-                       drm_handle_vblank(rdev->ddev, 1);
-                       rdev->pm.vblank_sync = true;
-                       wake_up(&rdev->irq.vblank_queue);
+                       if (rdev->irq.crtc_vblank_int[1]) {
+                               drm_handle_vblank(rdev->ddev, 1);
+                               rdev->pm.vblank_sync = true;
+                               wake_up(&rdev->irq.vblank_queue);
+                       }
+                       if (rdev->irq.pflip[1])
+                               radeon_crtc_handle_flip(rdev, 1);
                }
                if (status & RADEON_FP_DETECT_STAT) {
                        queue_hotplug = true;