From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx>
Add support to async updates of cursors by using the new atomic
interface for that. Basically what this commit does is do what
intel_legacy_cursor_update() did but through atomic.
v4:
- call drm_atomic_helper_async_check() from the check hook
v3:
- set correct vma to new state for cleanup
- move size checks back to drivers (Ville Syrjälä)
v2:
- move fb setting to core and use new state (Eric Anholt)
Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_atomic_plane.c | 73 ++++++++++++++
drivers/gpu/drm/i915/intel_display.c | 160 +++++-------------------------
2 files changed, 100 insertions(+), 133 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c
index ee76fab7bb6f..e5d64a206e75 100644
--- a/drivers/gpu/drm/i915/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/intel_atomic_plane.c
@@ -245,11 +245,84 @@ static void intel_plane_atomic_update(struct drm_plane *plane,
}
}
+static int intel_plane_atomic_async_check(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ struct drm_crtc *crtc = plane->state->crtc;
+ struct drm_crtc_state *crtc_state = crtc->state;
+
+ if (plane->type != DRM_PLANE_TYPE_CURSOR)
+ return -EINVAL;
+
+ /*
+ * When crtc is inactive or there is a modeset pending,
+ * wait for it to complete in the slowpath
+ */
+ if (!crtc_state->active || to_intel_crtc_state(crtc_state)->update_pipe)
+ return -EINVAL;
+
+ /*
+ * If any parameters change that may affect watermarks,
+ * take the slowpath. Only changing fb or position should be
+ * in the fastpath.
+ */
+ if (plane->state->crtc != state->crtc ||
+ plane->state->src_w != state->src_w ||
+ plane->state->src_h != state->src_h ||
+ plane->state->crtc_w != state->crtc_w ||
+ plane->state->crtc_h != state->crtc_h ||
+ !plane->state->fb != !state->fb)
+ return -EINVAL;
+
+ return 0;
+}
+
+static void intel_plane_atomic_async_update(struct drm_plane *plane,
+ struct drm_plane_state *new_state)
+{
+ struct intel_plane *intel_plane = to_intel_plane(plane);
+ struct drm_crtc *crtc = plane->state->crtc;
+ struct drm_framebuffer *old_fb;
+ struct i915_vma *old_vma;
+
+ old_vma = to_intel_plane_state(plane->state)->vma;
+ old_fb = plane->state->fb;
+
+ i915_gem_track_fb(intel_fb_obj(old_fb), intel_fb_obj(new_state->fb),
+ intel_plane->frontbuffer_bit);
+
+ plane->state->src_x = new_state->src_x;
+ plane->state->src_y = new_state->src_y;
+ plane->state->crtc_x = new_state->crtc_x;
+ plane->state->crtc_y = new_state->crtc_y;
+ plane->state->fb = new_state->fb;
+ *to_intel_plane_state(plane->state) = *to_intel_plane_state(new_state);
+
+ to_intel_plane_state(new_state)->vma = old_vma;
+ new_state->fb = old_fb;
+
+ if (plane->state->visible) {
+ trace_intel_update_plane(plane, to_intel_crtc(crtc));
+ intel_plane->update_plane(intel_plane,
+ to_intel_crtc_state(crtc->state),
+ to_intel_plane_state(plane->state));
+ } else {
+ trace_intel_disable_plane(plane, to_intel_crtc(crtc));
+ intel_plane->disable_plane(intel_plane, to_intel_crtc(crtc));
+ }
+
+ mutex_lock(&plane->dev->struct_mutex);
+ intel_cleanup_plane_fb(plane, new_state);
+ mutex_unlock(&plane->dev->struct_mutex);
+}
+
const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
.prepare_fb = intel_prepare_plane_fb,
.cleanup_fb = intel_cleanup_plane_fb,
.atomic_check = intel_plane_atomic_check,
.atomic_update = intel_plane_atomic_update,
+ .atomic_async_check = intel_plane_atomic_async_check,
+ .atomic_async_update = intel_plane_atomic_async_update,
};
/**
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3f505682963f..8399f04a8ad2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12765,6 +12765,9 @@ static int intel_atomic_check(struct drm_device *dev,
if (ret)
return ret;
+ if (state->legacy_cursor_update)
+ state->async_update = !drm_atomic_helper_async_check(dev, state);
+
intel_fbc_choose_crtc(dev_priv, state);
return calc_watermark_data(state);
}
@@ -13167,6 +13170,26 @@ static int intel_atomic_commit(struct drm_device *dev,
struct drm_i915_private *dev_priv = to_i915(dev);
int ret = 0;
+ /*
+ * The atomic async update fast path takes care
+ * of avoiding the vblank waits for simple cursor
+ * movement and flips. For cursor on/off and size changes,
+ * we want to perform the vblank waits so that watermark
+ * updates happen during the correct frames. Gen9+ have
+ * double buffered watermarks and so shouldn't need this.
+ */
+ if (state->async_update) {
+ ret = mutex_lock_interruptible(&dev->struct_mutex);
+ if (ret)
+ return ret;
+
+ ret = drm_atomic_helper_prepare_planes(dev, state);
+ mutex_unlock(&dev->struct_mutex);
+
+ drm_atomic_helper_async_commit(dev, state);
+ return 0;
+ }
+
ret = drm_atomic_helper_setup_commit(state, nonblock);
if (ret)
return ret;
@@ -13295,6 +13318,9 @@ intel_prepare_plane_fb(struct drm_plane *plane,
}
}
+ if (new_state->state->async_update)
+ return 0;
+
if (!obj && !old_obj)
return 0;
@@ -13521,140 +13547,8 @@ const struct drm_plane_funcs intel_plane_funcs = {
.atomic_destroy_state = intel_plane_destroy_state,
};
-static int
-intel_legacy_cursor_update(struct drm_plane *plane,
- struct drm_crtc *crtc,
- struct drm_framebuffer *fb,
- int crtc_x, int crtc_y,
- unsigned int crtc_w, unsigned int crtc_h,
- uint32_t src_x, uint32_t src_y,
- uint32_t src_w, uint32_t src_h,
- struct drm_modeset_acquire_ctx *ctx)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->dev);
- int ret;
- struct drm_plane_state *old_plane_state, *new_plane_state;
- struct intel_plane *intel_plane = to_intel_plane(plane);
- struct drm_framebuffer *old_fb;
- struct drm_crtc_state *crtc_state = crtc->state;
- struct i915_vma *old_vma;
-
- /*
- * When crtc is inactive or there is a modeset pending,
- * wait for it to complete in the slowpath
- */
- if (!crtc_state->active || needs_modeset(crtc_state) ||
- to_intel_crtc_state(crtc_state)->update_pipe)
- goto slow;
-
- old_plane_state = plane->state;
- /*
- * Don't do an async update if there is an outstanding commit modifying
- * the plane. This prevents our async update's changes from getting
- * overridden by a previous synchronous update's state.
- */
- if (old_plane_state->commit &&
- !try_wait_for_completion(&old_plane_state->commit->hw_done))
- goto slow;
-
- /*
- * If any parameters change that may affect watermarks,
- * take the slowpath. Only changing fb or position should be
- * in the fastpath.
- */
- if (old_plane_state->crtc != crtc ||
- old_plane_state->src_w != src_w ||
- old_plane_state->src_h != src_h ||
- old_plane_state->crtc_w != crtc_w ||
- old_plane_state->crtc_h != crtc_h ||
- !old_plane_state->fb != !fb)
- goto slow;
-
- new_plane_state = intel_plane_duplicate_state(plane);
- if (!new_plane_state)
- return -ENOMEM;
-
- drm_atomic_set_fb_for_plane(new_plane_state, fb);
-
- new_plane_state->src_x = src_x;
- new_plane_state->src_y = src_y;
- new_plane_state->src_w = src_w;
- new_plane_state->src_h = src_h;
- new_plane_state->crtc_x = crtc_x;
- new_plane_state->crtc_y = crtc_y;
- new_plane_state->crtc_w = crtc_w;
- new_plane_state->crtc_h = crtc_h;
-
- ret = intel_plane_atomic_check_with_state(to_intel_crtc_state(crtc->state),
- to_intel_plane_state(new_plane_state));
- if (ret)
- goto out_free;
-
- ret = mutex_lock_interruptible(&dev_priv->drm.struct_mutex);
- if (ret)
- goto out_free;
-
- if (INTEL_INFO(dev_priv)->cursor_needs_physical) {
- int align = intel_cursor_alignment(dev_priv);
-
- ret = i915_gem_object_attach_phys(intel_fb_obj(fb), align);
- if (ret) {
- DRM_DEBUG_KMS("failed to attach phys object\n");
- goto out_unlock;
- }
- } else {
- struct i915_vma *vma;
-
- vma = intel_pin_and_fence_fb_obj(fb, new_plane_state->rotation);
- if (IS_ERR(vma)) {
- DRM_DEBUG_KMS("failed to pin object\n");
-
- ret = PTR_ERR(vma);
- goto out_unlock;
- }
-
- to_intel_plane_state(new_plane_state)->vma = vma;
- }
-
- old_fb = old_plane_state->fb;
-
- i915_gem_track_fb(intel_fb_obj(old_fb), intel_fb_obj(fb),
- intel_plane->frontbuffer_bit);
-
- /* Swap plane state */
- plane->state = new_plane_state;
-
- if (plane->state->visible) {
- trace_intel_update_plane(plane, to_intel_crtc(crtc));
- intel_plane->update_plane(intel_plane,
- to_intel_crtc_state(crtc->state),
- to_intel_plane_state(plane->state));
- } else {
- trace_intel_disable_plane(plane, to_intel_crtc(crtc));
- intel_plane->disable_plane(intel_plane, to_intel_crtc(crtc));
- }
-
- old_vma = fetch_and_zero(&to_intel_plane_state(old_plane_state)->vma);
- if (old_vma)
- intel_unpin_fb_vma(old_vma);
-
-out_unlock:
- mutex_unlock(&dev_priv->drm.struct_mutex);
-out_free:
- if (ret)
- intel_plane_destroy_state(plane, new_plane_state);
- else
- intel_plane_destroy_state(plane, old_plane_state);
- return ret;
-
-slow:
- return drm_atomic_helper_update_plane(plane, crtc, fb,
- crtc_x, crtc_y, crtc_w, crtc_h,
- src_x, src_y, src_w, src_h, ctx);
-}
-
static const struct drm_plane_funcs intel_cursor_plane_funcs = {
- .update_plane = intel_legacy_cursor_update,
+ .update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = intel_plane_destroy,
.atomic_get_property = intel_plane_atomic_get_property,
--
2.13.5
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