Am 13.11.20 um 16:29 schrieb Maxime Ripard:
Now that the semaphore is gone, our atomic_commit implementation is basically drm_atomic_helper_commit with a somewhat custom commit_tail, the main difference being that we're using wait_for_flip_done instead of wait_for_vblanks used in the drm_atomic_helper_commit_tail helper. Let's switch to using drm_atomic_helper_commit. Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
--- drivers/gpu/drm/vc4/vc4_kms.c | 112 +--------------------------------- 1 file changed, 3 insertions(+), 109 deletions(-) diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c index 79ab7b8a5e0e..ede5d2b6ac65 100644 --- a/drivers/gpu/drm/vc4/vc4_kms.c +++ b/drivers/gpu/drm/vc4/vc4_kms.c @@ -333,8 +333,7 @@ static void vc5_hvs_pv_muxing_commit(struct vc4_dev *vc4, } }-static void-vc4_atomic_complete_commit(struct drm_atomic_state *state) +static void vc4_atomic_commit_tail(struct drm_atomic_state *state) { struct drm_device *dev = state->dev; struct vc4_dev *vc4 = to_vc4_dev(dev); @@ -357,10 +356,6 @@ vc4_atomic_complete_commit(struct drm_atomic_state *state) if (vc4->hvs->hvs5) clk_set_min_rate(hvs->core_clk, 500000000);- drm_atomic_helper_wait_for_fences(dev, state, false);- - drm_atomic_helper_wait_for_dependencies(state); - old_hvs_state = vc4_hvs_get_old_global_state(state); if (!old_hvs_state) return; @@ -408,20 +403,8 @@ vc4_atomic_complete_commit(struct drm_atomic_state *state)drm_atomic_helper_cleanup_planes(dev, state); - drm_atomic_helper_commit_cleanup_done(state);- if (vc4->hvs->hvs5) clk_set_min_rate(hvs->core_clk, 0); - - drm_atomic_state_put(state); -} - -static void commit_work(struct work_struct *work) -{ - struct drm_atomic_state *state = container_of(work, - struct drm_atomic_state, - commit_work); - vc4_atomic_complete_commit(state); }static int vc4_atomic_commit_setup(struct drm_atomic_state *state)@@ -454,96 +437,6 @@ static int vc4_atomic_commit_setup(struct drm_atomic_state *state) return 0; }-/**- * vc4_atomic_commit - commit validated state object - * @dev: DRM device - * @state: the driver state object - * @nonblock: nonblocking commit - * - * This function commits a with drm_atomic_helper_check() pre-validated state - * object. This can still fail when e.g. the framebuffer reservation fails. For - * now this doesn't implement asynchronous commits. - * - * RETURNS - * Zero for success or -errno. - */ -static int vc4_atomic_commit(struct drm_device *dev, - struct drm_atomic_state *state, - bool nonblock) -{ - int ret; - - if (state->async_update) { - 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); - - return 0; - } - - /* We know for sure we don't want an async update here. Set - * state->legacy_cursor_update to false to prevent - * drm_atomic_helper_setup_commit() from auto-completing - * commit->flip_done. - */ - state->legacy_cursor_update = false; - ret = drm_atomic_helper_setup_commit(state, nonblock); - if (ret) - return ret; - - INIT_WORK(&state->commit_work, commit_work); - - ret = drm_atomic_helper_prepare_planes(dev, state); - 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); - return ret; - } - } - - /* - * This is the point of no return - everything below never fails except - * when the hw goes bonghits. Which means we can commit the new state on - * the software side now. - */ - - BUG_ON(drm_atomic_helper_swap_state(state, false) < 0); - - /* - * Everything below can be run asynchronously without the need to grab - * any modeset locks at all under one condition: It must be guaranteed - * that the asynchronous work has either been cancelled (if the driver - * supports it, which at least requires that the framebuffers get - * cleaned up with drm_atomic_helper_cleanup_planes()) or completed - * before the new state gets committed on the software side with - * drm_atomic_helper_swap_state(). - * - * This scheme allows new atomic state updates to be prepared and - * checked in parallel to the asynchronous completion of the previous - * update. Which is important since compositors need to figure out the - * composition of the next frame right after having submitted the - * current layout. - */ - - drm_atomic_state_get(state); - if (nonblock) - queue_work(system_unbound_wq, &state->commit_work); - else - vc4_atomic_complete_commit(state); - - return 0; -} - static struct drm_framebuffer *vc4_fb_create(struct drm_device *dev, struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd) @@ -966,11 +859,12 @@ vc4_atomic_check(struct drm_device *dev, struct drm_atomic_state *state)static struct drm_mode_config_helper_funcs vc4_mode_config_helpers = {.atomic_commit_setup = vc4_atomic_commit_setup, + .atomic_commit_tail = vc4_atomic_commit_tail, };static const struct drm_mode_config_funcs vc4_mode_funcs = {.atomic_check = vc4_atomic_check, - .atomic_commit = vc4_atomic_commit, + .atomic_commit = drm_atomic_helper_commit, .fb_create = vc4_fb_create, };
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer
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