This is a note to let you know that I've just added the patch titled
drm/nouveau/kms: reference vblank for crtc during pageflip.
to the 3.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-nouveau-kms-reference-vblank-for-crtc-during-pageflip.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ba124a41058b300a5464206d2d33803cc3dc82ec Mon Sep 17 00:00:00 2001
From: Mario Kleiner <mario.kleiner.de@xxxxxxxxx>
Date: Wed, 11 Jun 2014 09:51:23 +0200
Subject: drm/nouveau/kms: reference vblank for crtc during pageflip.
From: Mario Kleiner <mario.kleiner.de@xxxxxxxxx>
commit ba124a41058b300a5464206d2d33803cc3dc82ec upstream.
Need to drm_vblank_get/put() the crtc involved in a
pending pageflip, or we might not get vblank irqs and
updates of vblank counts and timestamps for pageflip
events and flip completion.
Signed-off-by: Mario Kleiner <mario.kleiner.de@xxxxxxxxx>
Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/nouveau/nouveau_display.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -736,6 +736,9 @@ nouveau_crtc_page_flip(struct drm_crtc *
fb->bits_per_pixel, fb->pitches[0], crtc->x, crtc->y,
new_bo->bo.offset };
+ /* Keep vblanks on during flip, for the target crtc of this flip */
+ drm_vblank_get(dev, nouveau_crtc(crtc)->index);
+
/* Emit a page flip */
if (nv_device(drm->device)->card_type >= NV_50) {
ret = nv50_display_flip_next(crtc, fb, chan, swap_interval);
@@ -779,6 +782,7 @@ nouveau_crtc_page_flip(struct drm_crtc *
return 0;
fail_unreserve:
+ drm_vblank_put(dev, nouveau_crtc(crtc)->index);
ttm_bo_unreserve(&old_bo->bo);
fail_unpin:
mutex_unlock(&chan->cli->mutex);
@@ -817,6 +821,9 @@ nouveau_finish_page_flip(struct nouveau_
drm_send_vblank_event(dev, crtcid, s->event);
}
+ /* Give up ownership of vblank for page-flipped crtc */
+ drm_vblank_put(dev, s->crtc);
+
list_del(&s->head);
if (ps)
*ps = *s;
Patches currently in stable-queue which might be from mario.kleiner.de@xxxxxxxxx are
queue-3.15/drm-nouveau-kms-reference-vblank-for-crtc-during-pageflip.patch
queue-3.15/drm-nouveau-disp-nv04-nv40-abort-scanoutpos-query-on-vga-analog.patch
queue-3.15/drm-nouveau-kms-nv04-nv40-fix-pageflip-events-via-special-case.patch
queue-3.15/drm-nv50-mc-fix-kms-pageflip-events-by-reordering-irq-handling-order.patch
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