diff mbox

drm/atomic-helpers: Properly avoid full modeset dance

Message ID 1427406484-22494-1-git-send-email-daniel.vetter@ffwll.ch (mailing list archive)
State New, archived
Headers show

Commit Message

Daniel Vetter March 26, 2015, 9:48 p.m. UTC 
Legacy setCrtc has a nice fastpath for just updating the frontbuffer
when the output routing doesn't change. Which I of course tried to
keep working, except that I fumbled the job: The helpers correctly
compute ->mode_changed, CRTC updates get correctly skipped but
connector functions are called unconditionally.

Fix this.

Reported-and-Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
 drivers/gpu/drm/drm_atomic_helper.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index d9ed9a54fd1e..6e377d954538 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -587,7 +587,8 @@  disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
 
 		old_crtc_state = old_state->crtc_states[drm_crtc_index(old_conn_state->crtc)];
 
-		if (!old_crtc_state->active)
+		if (!old_crtc_state->active ||
+		    !needs_modeset(connector->state->crtc->state))
 			continue;
 
 		encoder = old_conn_state->best_encoder;
@@ -847,7 +848,8 @@  void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
 		if (!connector || !connector->state->best_encoder)
 			continue;
 
-		if (!connector->state->crtc->state->active)
+		if (!connector->state->crtc->state->active ||
+		    !needs_modeset(connector->state->crtc->state))
 			continue;
 
 		encoder = connector->state->best_encoder;