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drm/i915: Push pipelining of display plane flushes to the caller

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This ensures that we do wait upon the flushes to complete if necessary
and avoid the visual tears, whilst enabling pipelined page-flips.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-09-14 12:50:34 +01:00
parent 9e76e7b8bd
commit 48b956c5a8
5 changed files with 44 additions and 30 deletions
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3
drivers/gpu/drm/i915/i915_drv.h
View file

@ -1013,7 +1013,8 @@ void i915_gem_process_flushing_list(struct drm_device *dev,
struct intel_ring_buffer *ring);
int i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj,
int write);
int i915_gem_object_set_to_display_plane(struct drm_gem_object *obj);
int i915_gem_object_set_to_display_plane(struct drm_gem_object *obj,
bool pipelined);
int i915_gem_attach_phys_object(struct drm_device *dev,
struct drm_gem_object *obj,
int id,

8
drivers/gpu/drm/i915/i915_gem.c
View file

@ -2597,6 +2597,7 @@ i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj,
/* Queue the GPU write cache flushing we need. */
old_write_domain = obj->write_domain;
i915_gem_flush(dev, 0, obj->write_domain);
BUG_ON(obj->write_domain);
trace_i915_gem_object_change_domain(obj,
obj->read_domains,
@ -2704,7 +2705,8 @@ i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj, int write)
* wait, as in modesetting process we're not supposed to be interrupted.
*/
int
i915_gem_object_set_to_display_plane(struct drm_gem_object *obj)
i915_gem_object_set_to_display_plane(struct drm_gem_object *obj,
bool pipelined)
{
struct drm_i915_gem_object *obj_priv = to_intel_bo(obj);
uint32_t old_read_domains;
@ -2714,8 +2716,8 @@ i915_gem_object_set_to_display_plane(struct drm_gem_object *obj)
if (obj_priv->gtt_space == NULL)
return -EINVAL;
ret = i915_gem_object_flush_gpu_write_domain(obj, true);
if (ret != 0)
ret = i915_gem_object_flush_gpu_write_domain(obj, pipelined);
if (ret)
return ret;
i915_gem_object_flush_cpu_write_domain(obj);

58
drivers/gpu/drm/i915/intel_display.c
View file

@ -1417,7 +1417,9 @@ out_disable:
}
int
intel_pin_and_fence_fb_obj(struct drm_device *dev, struct drm_gem_object *obj)
intel_pin_and_fence_fb_obj(struct drm_device *dev,
struct drm_gem_object *obj,
bool pipelined)
{
struct drm_i915_gem_object *obj_priv = to_intel_bo(obj);
u32 alignment;
@ -1445,14 +1447,12 @@ intel_pin_and_fence_fb_obj(struct drm_device *dev, struct drm_gem_object *obj)
}
ret = i915_gem_object_pin(obj, alignment);
if (ret != 0)
if (ret)
return ret;
ret = i915_gem_object_set_to_display_plane(obj);
if (ret != 0) {
i915_gem_object_unpin(obj);
return ret;
}
ret = i915_gem_object_set_to_display_plane(obj, pipelined);
if (ret)
goto err_unpin;
/* Install a fence for tiled scan-out. Pre-i965 always needs a
* fence, whereas 965+ only requires a fence if using
@ -1462,13 +1462,15 @@ intel_pin_and_fence_fb_obj(struct drm_device *dev, struct drm_gem_object *obj)
if (obj_priv->fence_reg == I915_FENCE_REG_NONE &&
obj_priv->tiling_mode != I915_TILING_NONE) {
ret = i915_gem_object_get_fence_reg(obj);
if (ret != 0) {
i915_gem_object_unpin(obj);
return ret;
}
if (ret)
goto err_unpin;
}
return 0;
err_unpin:
i915_gem_object_unpin(obj);
return ret;
}
/* Assume fb object is pinned & idle & fenced and just update base pointers */
@ -1589,7 +1591,7 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
obj_priv = to_intel_bo(obj);
mutex_lock(&dev->struct_mutex);
ret = intel_pin_and_fence_fb_obj(dev, obj);
ret = intel_pin_and_fence_fb_obj(dev, obj, false);
if (ret != 0) {
mutex_unlock(&dev->struct_mutex);
return ret;
@ -5004,7 +5006,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
struct intel_unpin_work *work;
unsigned long flags, offset;
int pipe = intel_crtc->pipe;
u32 pf, pipesrc;
u32 was_dirty, pf, pipesrc;
int ret;
work = kzalloc(sizeof *work, GFP_KERNEL);
@ -5033,7 +5035,8 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
obj = intel_fb->obj;
mutex_lock(&dev->struct_mutex);
ret = intel_pin_and_fence_fb_obj(dev, obj);
was_dirty = obj->write_domain & I915_GEM_GPU_DOMAINS;
ret = intel_pin_and_fence_fb_obj(dev, obj, true);
if (ret)
goto cleanup_work;
@ -5051,17 +5054,24 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
atomic_inc(&obj_priv->pending_flip);
work->pending_flip_obj = obj;
if (IS_GEN3(dev) || IS_GEN2(dev)) {
u32 flip_mask;
if (intel_crtc->plane)
flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
else
flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
if (was_dirty || IS_GEN3(dev) || IS_GEN2(dev)) {
BEGIN_LP_RING(2);
OUT_RING(MI_WAIT_FOR_EVENT | flip_mask);
OUT_RING(0);
if (IS_GEN3(dev) || IS_GEN2(dev)) {
u32 flip_mask;
/* Can't queue multiple flips, so wait for the previous
* one to finish before executing the next.
*/
if (intel_crtc->plane)
flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
else
flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
OUT_RING(MI_WAIT_FOR_EVENT | flip_mask);
} else
OUT_RING(MI_NOOP);
OUT_RING(MI_FLUSH);
ADVANCE_LP_RING();
}

3
drivers/gpu/drm/i915/intel_drv.h
View file

@ -281,7 +281,8 @@ extern void ironlake_enable_drps(struct drm_device *dev);
extern void ironlake_disable_drps(struct drm_device *dev);
extern int intel_pin_and_fence_fb_obj(struct drm_device *dev,
struct drm_gem_object *obj);
struct drm_gem_object *obj,
bool pipelined);
extern int intel_framebuffer_init(struct drm_device *dev,
struct intel_framebuffer *ifb,

2
drivers/gpu/drm/i915/intel_fb.c
View file

@ -94,7 +94,7 @@ static int intelfb_create(struct intel_fbdev *ifbdev,
mutex_lock(&dev->struct_mutex);
/* Flush everything out, we'll be doing GTT only from now on */
ret = intel_pin_and_fence_fb_obj(dev, fbo);
ret = intel_pin_and_fence_fb_obj(dev, fbo, false);
if (ret) {
DRM_ERROR("failed to pin fb: %d\n", ret);
goto out_unref;