From: Mario Kleiner <mario.kleiner.de@gmail.com>
To: dri-devel@lists.freedesktop.org
Cc: alexander.deucher@amd.com, linux@bernd-steinhauser.de,
michel@daenzer.net, christian.koenig@amd.com
Subject: [PATCH 6/6] drm/radeon/pm: Handle failure of drm_vblank_get.
Date: Mon, 8 Feb 2016 02:13:29 +0100 [thread overview]
Message-ID: <1454894009-15466-7-git-send-email-mario.kleiner.de@gmail.com> (raw)
In-Reply-To: <1454894009-15466-1-git-send-email-mario.kleiner.de@gmail.com>
Make sure that drm_vblank_get/put() stay balanced in
case drm_vblank_get fails, by skipping the corresponding
put.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: michel@daenzer.net
Cc: dri-devel@lists.freedesktop.org
Cc: alexander.deucher@amd.com
Cc: christian.koenig@amd.com
---
drivers/gpu/drm/radeon/radeon_pm.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 59abebd..339a6c5 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -276,8 +276,12 @@ static void radeon_pm_set_clocks(struct radeon_device *rdev)
if (rdev->irq.installed) {
for (i = 0; i < rdev->num_crtc; i++) {
if (rdev->pm.active_crtcs & (1 << i)) {
- rdev->pm.req_vblank |= (1 << i);
- drm_vblank_get(rdev->ddev, i);
+ /* This can fail if a modeset is in progress */
+ if (0 == drm_vblank_get(rdev->ddev, i))
+ rdev->pm.req_vblank |= (1 << i);
+ else
+ DRM_DEBUG_DRIVER("crtc %d no vblank, can glitch\n",
+ i);
}
}
}
--
1.9.1
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next prev parent reply other threads:[~2016-02-08 1:14 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-08 1:13 drm vblank regression fixes for Linux 4.4+ Mario Kleiner
2016-02-08 1:13 ` [PATCH 1/6] drm: No-Op redundant calls to drm_vblank_off() Mario Kleiner
2016-02-09 9:54 ` Daniel Vetter
2016-02-09 13:27 ` Mario Kleiner
2016-02-08 1:13 ` [PATCH 2/6] drm: Prevent vblank counter bumps > 1 with active vblank clients Mario Kleiner
2016-02-09 9:56 ` Daniel Vetter
2016-02-09 10:07 ` Ville Syrjälä
2016-02-09 10:23 ` Daniel Vetter
2016-02-09 13:39 ` Mario Kleiner
2016-02-09 14:29 ` Daniel Vetter
2016-02-09 16:18 ` Mario Kleiner
2016-02-08 1:13 ` [PATCH 3/6] drm: Fix drm_vblank_pre/post_modeset regression from Linux 4.4 Mario Kleiner
2016-02-09 10:00 ` Daniel Vetter
2016-02-11 13:03 ` Vlastimil Babka
2016-02-08 1:13 ` [PATCH 4/6] drm: Fix treatment of drm_vblank_offdelay in drm_vblank_on() Mario Kleiner
2016-02-09 10:06 ` Daniel Vetter
2016-02-09 11:10 ` Ville Syrjälä
2016-02-09 13:29 ` Mario Kleiner
2016-02-09 13:41 ` Ville Syrjälä
2016-02-09 14:31 ` Daniel Vetter
2016-02-08 1:13 ` [PATCH 5/6] drm: Prevent vblank counter jumps with timestamp based update method Mario Kleiner
2016-02-09 10:09 ` Daniel Vetter
2016-02-09 13:53 ` Mario Kleiner
2016-02-09 14:11 ` Ville Syrjälä
2016-02-09 15:03 ` Daniel Vetter
2016-02-10 16:28 ` Mario Kleiner
2016-02-10 17:17 ` Daniel Vetter
2016-02-10 18:36 ` Mario Kleiner
2016-02-10 19:34 ` Daniel Vetter
2016-02-08 1:13 ` Mario Kleiner [this message]
2016-02-09 10:10 ` [PATCH 6/6] drm/radeon/pm: Handle failure of drm_vblank_get Daniel Vetter
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