diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/950-0179-drm-vc4-Fix-sending-of-page-flip-completion-events-i.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.9/950-0179-drm-vc4-Fix-sending-of-page-flip-completion-events-i.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/950-0179-drm-vc4-Fix-sending-of-page-flip-completion-events-i.patch b/target/linux/brcm2708/patches-4.9/950-0179-drm-vc4-Fix-sending-of-page-flip-completion-events-i.patch new file mode 100644 index 0000000000..73fbf2bc99 --- /dev/null +++ b/target/linux/brcm2708/patches-4.9/950-0179-drm-vc4-Fix-sending-of-page-flip-completion-events-i.patch @@ -0,0 +1,42 @@ +From bc93583742c7ba9c84462664d4c798ba43bef26f Mon Sep 17 00:00:00 2001 +From: Eric Anholt <eric@anholt.net> +Date: Thu, 2 Feb 2017 09:42:18 -0800 +Subject: [PATCH] drm/vc4: Fix sending of page flip completion events in FKMS + mode. + +In the rewrite of vc4_crtc.c for fkms, I dropped the part of the +CRTC's atomic flush handler that moved the completion event from the +proposed atomic state change to the CRTC's current state. That meant +that when full screen pageflipping happened (glxgears -fullscreen in +X, compton, por weston), the app would end up blocked firever waiting +to draw its next frame. + +Signed-off-by: Eric Anholt <eric@anholt.net> +--- + drivers/gpu/drm/vc4/vc4_firmware_kms.c | 15 +++++++++++++++ + 1 file changed, 15 insertions(+) + +--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c ++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c +@@ -338,6 +338,21 @@ static int vc4_crtc_atomic_check(struct + static void vc4_crtc_atomic_flush(struct drm_crtc *crtc, + struct drm_crtc_state *old_state) + { ++ struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); ++ struct drm_device *dev = crtc->dev; ++ ++ if (crtc->state->event) { ++ unsigned long flags; ++ ++ crtc->state->event->pipe = drm_crtc_index(crtc); ++ ++ WARN_ON(drm_crtc_vblank_get(crtc) != 0); ++ ++ spin_lock_irqsave(&dev->event_lock, flags); ++ vc4_crtc->event = crtc->state->event; ++ crtc->state->event = NULL; ++ spin_unlock_irqrestore(&dev->event_lock, flags); ++ } + } + + static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc) |