[-PATCH v5 5/5] drm/vc4: update cursors asynchronously through atomic
Gustavo Padovan
gustavo at padovan.org
Fri Sep 8 19:24:19 UTC 2017
From: Gustavo Padovan <gustavo.padovan at collabora.com>
Add support for async updates of cursors by using the new atomic
interface for that. Basically what this commit does is do what
vc4_update_plane() did but through atomic.
v5: add missing call to vc4_plane_atomic_check() (Eric Anholt)
v4: add drm_atomic_helper_async() commit (Eric Anholt)
v3: move size checks back to drivers (Ville Syrjälä)
v2: move fb setting to core and use new state (Eric Anholt)
Cc: Eric Anholt <eric at anholt.net>
Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.com>
Reviewed-by: Eric Anholt <eric at anholt.net>
Signed-off-by: Eric Anholt <eric at anholt.net>
---
drivers/gpu/drm/vc4/vc4_kms.c | 20 +++++++
drivers/gpu/drm/vc4/vc4_plane.c | 128 ++++++++++++++++------------------------
2 files changed, 71 insertions(+), 77 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
index 50c4959b5bd3..e006b4849f73 100644
--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -96,6 +96,26 @@ static int vc4_atomic_commit(struct drm_device *dev,
struct vc4_dev *vc4 = to_vc4_dev(dev);
int ret;
+ if (state->async_update) {
+ ret = down_interruptible(&vc4->async_modeset);
+ if (ret)
+ return ret;
+
+ ret = drm_atomic_helper_prepare_planes(dev, state);
+ if (ret) {
+ up(&vc4->async_modeset);
+ return ret;
+ }
+
+ drm_atomic_helper_async_commit(dev, state);
+
+ drm_atomic_helper_cleanup_planes(dev, state);
+
+ up(&vc4->async_modeset);
+
+ return 0;
+ }
+
ret = drm_atomic_helper_setup_commit(state, nonblock);
if (ret)
return ret;
diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
index 2968b3ebb895..36d41b172919 100644
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -759,87 +759,41 @@ void vc4_plane_async_set_fb(struct drm_plane *plane, struct drm_framebuffer *fb)
vc4_state->dlist[vc4_state->ptr0_offset] = addr;
}
-static int vc4_prepare_fb(struct drm_plane *plane,
- struct drm_plane_state *state)
+static int vc4_plane_atomic_async_check(struct drm_plane *plane,
+ struct drm_plane_state *state)
{
- struct vc4_bo *bo;
- struct dma_fence *fence;
+ if (plane != state->crtc->cursor)
+ return -EINVAL;
- if ((plane->state->fb == state->fb) || !state->fb)
- return 0;
+ if (!plane->state)
+ return -EINVAL;
- bo = to_vc4_bo(&drm_fb_cma_get_gem_obj(state->fb, 0)->base);
- fence = reservation_object_get_excl_rcu(bo->resv);
- drm_atomic_set_fence_for_plane(state, fence);
+ /* No configuring new scaling in the fast path. */
+ if (state->crtc_w != plane->state->crtc_w ||
+ state->crtc_h != plane->state->crtc_h ||
+ state->src_w != plane->state->src_w ||
+ state->src_h != plane->state->src_h) {
+ return -EINVAL;
+ }
return 0;
}
-static const struct drm_plane_helper_funcs vc4_plane_helper_funcs = {
- .atomic_check = vc4_plane_atomic_check,
- .atomic_update = vc4_plane_atomic_update,
- .prepare_fb = vc4_prepare_fb,
-};
-
-static void vc4_plane_destroy(struct drm_plane *plane)
-{
- drm_plane_helper_disable(plane);
- drm_plane_cleanup(plane);
-}
-
-/* Implements immediate (non-vblank-synced) updates of the cursor
- * position, or falls back to the atomic helper otherwise.
- */
-static int
-vc4_update_plane(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)
+static void vc4_plane_atomic_async_update(struct drm_plane *plane,
+ struct drm_plane_state *new_state)
{
- struct drm_plane_state *plane_state;
- struct vc4_plane_state *vc4_state;
-
- if (plane != crtc->cursor)
- goto out;
-
- plane_state = plane->state;
- vc4_state = to_vc4_plane_state(plane_state);
-
- if (!plane_state)
- goto out;
-
- /* No configuring new scaling in the fast path. */
- if (crtc_w != plane_state->crtc_w ||
- crtc_h != plane_state->crtc_h ||
- src_w != plane_state->src_w ||
- src_h != plane_state->src_h) {
- goto out;
- }
-
- if (fb != plane_state->fb) {
- drm_atomic_set_fb_for_plane(plane->state, fb);
- vc4_plane_async_set_fb(plane, fb);
- }
+ struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
- /* Set the cursor's position on the screen. This is the
- * expected change from the drm_mode_cursor_universal()
- * helper.
- */
- plane_state->crtc_x = crtc_x;
- plane_state->crtc_y = crtc_y;
+ 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;
- /* Allow changing the start position within the cursor BO, if
- * that matters.
- */
- plane_state->src_x = src_x;
- plane_state->src_y = src_y;
+ if (plane->state->fb != new_state->fb)
+ vc4_plane_async_set_fb(plane, new_state->fb);
/* Update the display list based on the new crtc_x/y. */
- vc4_plane_atomic_check(plane, plane_state);
+ vc4_plane_atomic_check(plane, plane->state);
/* Note that we can't just call vc4_plane_write_dlist()
* because that would smash the context data that the HVS is
@@ -851,20 +805,40 @@ vc4_update_plane(struct drm_plane *plane,
&vc4_state->hw_dlist[vc4_state->pos2_offset]);
writel(vc4_state->dlist[vc4_state->ptr0_offset],
&vc4_state->hw_dlist[vc4_state->ptr0_offset]);
+}
+
+static int vc4_prepare_fb(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ struct vc4_bo *bo;
+ struct dma_fence *fence;
+
+ if ((plane->state->fb == state->fb) || !state->fb)
+ return 0;
+
+ bo = to_vc4_bo(&drm_fb_cma_get_gem_obj(state->fb, 0)->base);
+ fence = reservation_object_get_excl_rcu(bo->resv);
+ drm_atomic_set_fence_for_plane(state, fence);
return 0;
+}
+
+static const struct drm_plane_helper_funcs vc4_plane_helper_funcs = {
+ .atomic_check = vc4_plane_atomic_check,
+ .atomic_update = vc4_plane_atomic_update,
+ .atomic_async_check = vc4_plane_atomic_async_check,
+ .atomic_async_update = vc4_plane_atomic_async_update,
+ .prepare_fb = vc4_prepare_fb,
+};
-out:
- 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 void vc4_plane_destroy(struct drm_plane *plane)
+{
+ drm_plane_helper_disable(plane);
+ drm_plane_cleanup(plane);
}
static const struct drm_plane_funcs vc4_plane_funcs = {
- .update_plane = vc4_update_plane,
+ .update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = vc4_plane_destroy,
.set_property = NULL,
--
2.13.5
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