From 3cf50c63a76177e0bbe0e46e1abe4eb263128ba4 Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Tue, 19 Sep 2017 14:14:18 +0200 Subject: [PATCH] drm/i915: Unset legacy_cursor_update early in intel_atomic_commit, v3. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Commit b44d5c0c105a ("drm/i915: Always wait for flip_done, v2.") removed the call to wait_for_vblanks and replaced it with flip_done. Unfortunately legacy_cursor_update was unset too late, and the replacement call drm_atomic_helper_wait_for_flip_done() was a noop. Make sure that its unset before setup_commit() is called to fix this issue. Changes since v1: - Force vblank wait for watermarks not yet converted to atomic too. (Ville) - Use for_each_new_intel_crtc_in_state. (Ville) Changes since v2: - Move the optimization to a separate commit. (Ville) Signed-off-by: Maarten Lankhorst Fixes: b44d5c0c105a ("drm/i915: Always wait for flip_done, v2.") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102675 Testcase: kms_cursor_crc Cc: Daniel Vetter Cc: Jani Nikula Reported-by: Marta Löfstedt Cc: Marta Löfstedt Tested-by: Marta Löfstedt Cc: Ville Syrjälä Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20170919121419.13708-1-maarten.lankhorst@linux.intel.com --- drivers/gpu/drm/i915/intel_display.c | 33 ++++++++++++++++----------------- 1 file changed, 16 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index b7a6ddc..e55f68c 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -12541,21 +12541,10 @@ static int intel_atomic_commit(struct drm_device *dev, struct drm_i915_private *dev_priv = to_i915(dev); int ret = 0; - ret = drm_atomic_helper_setup_commit(state, nonblock); - if (ret) - return ret; - drm_atomic_state_get(state); i915_sw_fence_init(&intel_state->commit_ready, intel_atomic_commit_ready); - ret = intel_atomic_prepare_commit(dev, state); - if (ret) { - DRM_DEBUG_ATOMIC("Preparing state failed with %i\n", ret); - i915_sw_fence_commit(&intel_state->commit_ready); - return ret; - } - /* * The intel_legacy_cursor_update() fast path takes care * of avoiding the vblank waits for simple cursor @@ -12564,11 +12553,11 @@ static int intel_atomic_commit(struct drm_device *dev, * updates happen during the correct frames. Gen9+ have * double buffered watermarks and so shouldn't need this. * - * Do this after drm_atomic_helper_setup_commit() and - * intel_atomic_prepare_commit() because we still want - * to skip the flip and fb cleanup waits. Although that - * does risk yanking the mapping from under the display - * engine. + * Unset state->legacy_cursor_update before the call to + * drm_atomic_helper_setup_commit() because otherwise + * drm_atomic_helper_wait_for_flip_done() is a noop and + * we get FIFO underruns because we didn't wait + * for vblank. * * FIXME doing watermarks and fb cleanup from a vblank worker * (assuming we had any) would solve these problems. @@ -12576,7 +12565,17 @@ static int intel_atomic_commit(struct drm_device *dev, if (INTEL_GEN(dev_priv) < 9) state->legacy_cursor_update = false; - ret = drm_atomic_helper_swap_state(state, true); + ret = intel_atomic_prepare_commit(dev, state); + if (ret) { + DRM_DEBUG_ATOMIC("Preparing state failed with %i\n", ret); + i915_sw_fence_commit(&intel_state->commit_ready); + return ret; + } + + ret = drm_atomic_helper_setup_commit(state, nonblock); + if (!ret) + ret = drm_atomic_helper_swap_state(state, true); + if (ret) { i915_sw_fence_commit(&intel_state->commit_ready); -- 2.7.4