From: Maarten Lankhorst Date: Thu, 8 Dec 2016 13:45:27 +0000 (+0100) Subject: drm/atomic: Wait for vblank whenever a plane is added to state. X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a3fbb53f45fd208ec65e8a80a07f5d4ea11b0f69;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git drm/atomic: Wait for vblank whenever a plane is added to state. There's 2 reasons for doing a vblank wait: - To fulfill uabi expectations, but the legacy ioctls are ill-defined enough that we really only need this when we do send out an event. - To make sure we don't tear down mappings before the scanout engine stops accessing it. The later is problematic with the current code since e.g. rotation might need a different mapping than normal orientation. And rotation is a plane property, and not on the fb. Hence we need to remove this optimization. Signed-off-by: Maarten Lankhorst [danvet: Completely new commit message.] Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1481204729-9058-5-git-send-email-maarten.lankhorst@linux.intel.com --- diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index d1d678d63b84..f5b2a688eb0d 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1129,11 +1129,7 @@ drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { struct drm_crtc_state *new_crtc_state = crtc->state; - if (!new_crtc_state->active) - continue; - - if (!drm_atomic_helper_framebuffer_changed(dev, - old_state, crtc)) + if (!new_crtc_state->active || !new_crtc_state->planes_changed) continue; ret = drm_crtc_vblank_get(crtc);