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path: root/drivers/char/drm/i915_irq.c
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Diffstat (limited to 'drivers/char/drm/i915_irq.c')
-rw-r--r--drivers/char/drm/i915_irq.c199
1 files changed, 139 insertions, 60 deletions
diff --git a/drivers/char/drm/i915_irq.c b/drivers/char/drm/i915_irq.c
index e5463b111fc..e2c4b3a41b1 100644
--- a/drivers/char/drm/i915_irq.c
+++ b/drivers/char/drm/i915_irq.c
@@ -46,88 +46,167 @@ static void i915_vblank_tasklet(drm_device_t *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
- struct list_head *list, *tmp;
+ struct list_head *list, *tmp, hits, *hit;
+ int nhits, nrects, slice[2], upper[2], lower[2], i;
+ unsigned counter[2] = { atomic_read(&dev->vbl_received),
+ atomic_read(&dev->vbl_received2) };
+ drm_drawable_info_t *drw;
+ drm_i915_sarea_t *sarea_priv = dev_priv->sarea_priv;
+ u32 cpp = dev_priv->cpp;
+ u32 cmd = (cpp == 4) ? (XY_SRC_COPY_BLT_CMD |
+ XY_SRC_COPY_BLT_WRITE_ALPHA |
+ XY_SRC_COPY_BLT_WRITE_RGB)
+ : XY_SRC_COPY_BLT_CMD;
+ u32 pitchropcpp = (sarea_priv->pitch * cpp) | (0xcc << 16) |
+ (cpp << 23) | (1 << 24);
+ RING_LOCALS;
DRM_DEBUG("\n");
+ INIT_LIST_HEAD(&hits);
+
+ nhits = nrects = 0;
+
spin_lock_irqsave(&dev_priv->swaps_lock, irqflags);
+ /* Find buffer swaps scheduled for this vertical blank */
list_for_each_safe(list, tmp, &dev_priv->vbl_swaps.head) {
drm_i915_vbl_swap_t *vbl_swap =
list_entry(list, drm_i915_vbl_swap_t, head);
- atomic_t *counter = vbl_swap->pipe ? &dev->vbl_received2 :
- &dev->vbl_received;
-
- if ((atomic_read(counter) - vbl_swap->sequence) <= (1<<23)) {
- drm_drawable_info_t *drw;
-
- spin_unlock(&dev_priv->swaps_lock);
-
- spin_lock(&dev->drw_lock);
-
- drw = drm_get_drawable_info(dev, vbl_swap->drw_id);
-
- if (drw) {
- int i, num_rects = drw->num_rects;
- drm_clip_rect_t *rect = drw->rects;
- drm_i915_sarea_t *sarea_priv =
- dev_priv->sarea_priv;
- u32 cpp = dev_priv->cpp;
- u32 cmd = (cpp == 4) ? (XY_SRC_COPY_BLT_CMD |
- XY_SRC_COPY_BLT_WRITE_ALPHA |
- XY_SRC_COPY_BLT_WRITE_RGB)
- : XY_SRC_COPY_BLT_CMD;
- u32 pitchropcpp = (sarea_priv->pitch * cpp) |
- (0xcc << 16) | (cpp << 23) |
- (1 << 24);
- RING_LOCALS;
-
- i915_kernel_lost_context(dev);
-
- BEGIN_LP_RING(6);
-
- OUT_RING(GFX_OP_DRAWRECT_INFO);
- OUT_RING(0);
- OUT_RING(0);
- OUT_RING(sarea_priv->width |
- sarea_priv->height << 16);
- OUT_RING(sarea_priv->width |
- sarea_priv->height << 16);
- OUT_RING(0);
- ADVANCE_LP_RING();
+ if ((counter[vbl_swap->pipe] - vbl_swap->sequence) > (1<<23))
+ continue;
+
+ list_del(list);
+ dev_priv->swaps_pending--;
- sarea_priv->ctxOwner = DRM_KERNEL_CONTEXT;
+ spin_unlock(&dev_priv->swaps_lock);
+ spin_lock(&dev->drw_lock);
- for (i = 0; i < num_rects; i++, rect++) {
- BEGIN_LP_RING(8);
+ drw = drm_get_drawable_info(dev, vbl_swap->drw_id);
+
+ if (!drw) {
+ spin_unlock(&dev->drw_lock);
+ drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER);
+ spin_lock(&dev_priv->swaps_lock);
+ continue;
+ }
- OUT_RING(cmd);
- OUT_RING(pitchropcpp);
- OUT_RING((rect->y1 << 16) | rect->x1);
- OUT_RING((rect->y2 << 16) | rect->x2);
- OUT_RING(sarea_priv->front_offset);
- OUT_RING((rect->y1 << 16) | rect->x1);
- OUT_RING(pitchropcpp & 0xffff);
- OUT_RING(sarea_priv->back_offset);
+ list_for_each(hit, &hits) {
+ drm_i915_vbl_swap_t *swap_cmp =
+ list_entry(hit, drm_i915_vbl_swap_t, head);
+ drm_drawable_info_t *drw_cmp =
+ drm_get_drawable_info(dev, swap_cmp->drw_id);
- ADVANCE_LP_RING();
- }
+ if (drw_cmp &&
+ drw_cmp->rects[0].y1 > drw->rects[0].y1) {
+ list_add_tail(list, hit);
+ break;
}
+ }
- spin_unlock(&dev->drw_lock);
+ spin_unlock(&dev->drw_lock);
- spin_lock(&dev_priv->swaps_lock);
+ /* List of hits was empty, or we reached the end of it */
+ if (hit == &hits)
+ list_add_tail(list, hits.prev);
- list_del(list);
+ nhits++;
- drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER);
+ spin_lock(&dev_priv->swaps_lock);
+ }
+
+ if (nhits == 0) {
+ spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
+ return;
+ }
+
+ spin_unlock(&dev_priv->swaps_lock);
- dev_priv->swaps_pending--;
+ i915_kernel_lost_context(dev);
+
+ BEGIN_LP_RING(6);
+
+ OUT_RING(GFX_OP_DRAWRECT_INFO);
+ OUT_RING(0);
+ OUT_RING(0);
+ OUT_RING(sarea_priv->width | sarea_priv->height << 16);
+ OUT_RING(sarea_priv->width | sarea_priv->height << 16);
+ OUT_RING(0);
+
+ ADVANCE_LP_RING();
+
+ sarea_priv->ctxOwner = DRM_KERNEL_CONTEXT;
+
+ upper[0] = upper[1] = 0;
+ slice[0] = max(sarea_priv->pipeA_h / nhits, 1);
+ slice[1] = max(sarea_priv->pipeB_h / nhits, 1);
+ lower[0] = sarea_priv->pipeA_y + slice[0];
+ lower[1] = sarea_priv->pipeB_y + slice[0];
+
+ spin_lock(&dev->drw_lock);
+
+ /* Emit blits for buffer swaps, partitioning both outputs into as many
+ * slices as there are buffer swaps scheduled in order to avoid tearing
+ * (based on the assumption that a single buffer swap would always
+ * complete before scanout starts).
+ */
+ for (i = 0; i++ < nhits;
+ upper[0] = lower[0], lower[0] += slice[0],
+ upper[1] = lower[1], lower[1] += slice[1]) {
+ if (i == nhits)
+ lower[0] = lower[1] = sarea_priv->height;
+
+ list_for_each(hit, &hits) {
+ drm_i915_vbl_swap_t *swap_hit =
+ list_entry(hit, drm_i915_vbl_swap_t, head);
+ drm_clip_rect_t *rect;
+ int num_rects, pipe;
+ unsigned short top, bottom;
+
+ drw = drm_get_drawable_info(dev, swap_hit->drw_id);
+
+ if (!drw)
+ continue;
+
+ rect = drw->rects;
+ pipe = swap_hit->pipe;
+ top = upper[pipe];
+ bottom = lower[pipe];
+
+ for (num_rects = drw->num_rects; num_rects--; rect++) {
+ int y1 = max(rect->y1, top);
+ int y2 = min(rect->y2, bottom);
+
+ if (y1 >= y2)
+ continue;
+
+ BEGIN_LP_RING(8);
+
+ OUT_RING(cmd);
+ OUT_RING(pitchropcpp);
+ OUT_RING((y1 << 16) | rect->x1);
+ OUT_RING((y2 << 16) | rect->x2);
+ OUT_RING(sarea_priv->front_offset);
+ OUT_RING((y1 << 16) | rect->x1);
+ OUT_RING(pitchropcpp & 0xffff);
+ OUT_RING(sarea_priv->back_offset);
+
+ ADVANCE_LP_RING();
+ }
}
}
- spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
+ spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+
+ list_for_each_safe(hit, tmp, &hits) {
+ drm_i915_vbl_swap_t *swap_hit =
+ list_entry(hit, drm_i915_vbl_swap_t, head);
+
+ list_del(hit);
+
+ drm_free(swap_hit, sizeof(*swap_hit), DRM_MEM_DRIVER);
+ }
}
irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-22 02:47:57 +0000