| From | Kamal Mostafa <> | Subject | [PATCH 3.13 117/198] drm/nouveau/kms/nv04-nv40: fix pageflip events via special case. | Date | Tue, 15 Jul 2014 14:29:47 -0700 |
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3.13.11.5 -stable review patch. If anyone has any objections, please let me know.
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From: Mario Kleiner <mario.kleiner.de@gmail.com>
commit af4870e406126b7ac0ae7c7ce5751f25ebe60f28 upstream.
Cards with nv04 display engine can't reliably use vblank counts and timestamps computed via drm_handle_vblank(), as the function gets invoked after sending the pageflip events.
Fix this by defaulting to the old crtcid = -1 fallback path on <= NV-50 cards, and only using the precise path on NV-50 and later.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/gpu/drm/nouveau/nouveau_display.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c index a0b2b87..cdaee13 100644 --- a/drivers/gpu/drm/nouveau/nouveau_display.c +++ b/drivers/gpu/drm/nouveau/nouveau_display.c @@ -692,6 +692,7 @@ nouveau_finish_page_flip(struct nouveau_channel *chan, struct drm_device *dev = drm->dev; struct nouveau_page_flip_state *s; unsigned long flags; + int crtcid = -1; spin_lock_irqsave(&dev->event_lock, flags); @@ -702,8 +703,13 @@ nouveau_finish_page_flip(struct nouveau_channel *chan, } s = list_first_entry(&fctx->flip, struct nouveau_page_flip_state, head); - if (s->event) - drm_send_vblank_event(dev, s->crtc, s->event); + if (s->event) { + /* Vblank timestamps/counts are only correct on >= NV-50 */ + if (nv_device(drm->device)->card_type >= NV_50) + crtcid = s->crtc; + + drm_send_vblank_event(dev, crtcid, s->event); + } list_del(&s->head); if (ps) -- 1.9.1
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