Now that we have proper ordering guaranteed by the previous patch, the
semaphore is redundant and can be removed.
Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
---
drivers/gpu/drm/vc4/vc4_crtc.c | 13 -------------
drivers/gpu/drm/vc4/vc4_drv.h | 2 --
drivers/gpu/drm/vc4/vc4_kms.c | 20 +-------------------
3 files changed, 1 insertion(+), 34 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
index 29b77f4b4e56..65d43e2e1d51 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -699,7 +699,6 @@ vc4_async_page_flip_complete(struct vc4_seqno_cb *cb)
container_of(cb, struct vc4_async_flip_state, cb);
struct drm_crtc *crtc = flip_state->crtc;
struct drm_device *dev = crtc->dev;
- struct vc4_dev *vc4 = to_vc4_dev(dev);
struct drm_plane *plane = crtc->primary;
vc4_plane_async_set_fb(plane, flip_state->fb);
@@ -731,8 +730,6 @@ vc4_async_page_flip_complete(struct vc4_seqno_cb *cb)
}
kfree(flip_state);
-
- up(&vc4->async_modeset);
}
/* Implements async (non-vblank-synced) page flips.
@@ -747,7 +744,6 @@ static int vc4_async_page_flip(struct drm_crtc *crtc,
uint32_t flags)
{
struct drm_device *dev = crtc->dev;
- struct vc4_dev *vc4 = to_vc4_dev(dev);
struct drm_plane *plane = crtc->primary;
int ret = 0;
struct vc4_async_flip_state *flip_state;
@@ -776,15 +772,6 @@ static int vc4_async_page_flip(struct drm_crtc *crtc,
flip_state->crtc = crtc;
flip_state->event = event;
- /* Make sure all other async modesetes have landed. */
- ret = down_interruptible(&vc4->async_modeset);
- if (ret) {
- drm_framebuffer_put(fb);
- vc4_bo_dec_usecnt(bo);
- kfree(flip_state);
- return ret;
- }
-
/* Save the current FB before it's replaced by the new one in
* drm_atomic_set_fb_for_plane(). We'll need the old FB in
* vc4_async_page_flip_complete() to decrement the BO usecnt and keep
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index 9eefd76cb09e..60062afba7b6 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -215,8 +215,6 @@ struct vc4_dev {
struct work_struct reset_work;
} hangcheck;
- struct semaphore async_modeset;
-
struct drm_modeset_lock ctm_state_lock;
struct drm_private_obj ctm_manager;
struct drm_private_obj hvs_channels;
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
index 849bc6b4cea4..79ab7b8a5e0e 100644
--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -414,8 +414,6 @@ vc4_atomic_complete_commit(struct drm_atomic_state *state)
clk_set_min_rate(hvs->core_clk, 0);
drm_atomic_state_put(state);
-
- up(&vc4->async_modeset);
}
static void commit_work(struct work_struct *work)
@@ -473,14 +471,9 @@ static int vc4_atomic_commit(struct drm_device *dev,
struct drm_atomic_state *state,
bool nonblock)
{
- 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);
@@ -491,8 +484,6 @@ static int vc4_atomic_commit(struct drm_device *dev,
drm_atomic_helper_cleanup_planes(dev, state);
- up(&vc4->async_modeset);
-
return 0;
}
@@ -508,21 +499,14 @@ static int vc4_atomic_commit(struct drm_device *dev,
INIT_WORK(&state->commit_work, commit_work);
- ret = down_interruptible(&vc4->async_modeset);
- if (ret)
- return ret;
-
ret = drm_atomic_helper_prepare_planes(dev, state);
- if (ret) {
- up(&vc4->async_modeset);
+ if (ret)
return ret;
- }
if (!nonblock) {
ret = drm_atomic_helper_wait_for_fences(dev, state, true);
if (ret) {
drm_atomic_helper_cleanup_planes(dev, state);
- up(&vc4->async_modeset);
return ret;
}
}
@@ -1006,8 +990,6 @@ int vc4_kms_load(struct drm_device *dev)
vc4->load_tracker_enabled = true;
}
- sema_init(&vc4->async_modeset, 1);
-
/* Set support for vblank irq fast disable, before drm_vblank_init() */
dev->vblank_disable_immediate = true;
--
2.28.0
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