diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2011-01-31 11:16:33 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2011-01-31 12:36:33 +0000 |
| commit | ede3ff5204b0117d00609f4980df3b864cefe96f (patch) | |
| tree | dda9eb0628576ad239f1315d05e94359db1f4770 /drivers/gpu/drm/drm_crtc_helper.c | |
| parent | 9334ef755f060e251f3f395caeda1a58b6834ea3 (diff) | |
drm: Simplify and defend later checks when disabling a crtc
By setting the FB of a CRTC to NULL, we are turning off the CRTC (and so
disable the unused encoders and connectors). As such we can simplify the
later tests by making sure the set->mode is NULL. Setting the
num_connectors to zero means that we do not need to loop over the unused
connectors.
All current usage appears correct, this only builds additional defense
into the routine.
References: https://bugzilla.kernel.org/show_bug.cgi?id=27722
Tested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu/drm/drm_crtc_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc_helper.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index 468e8e16c806..c4178d7c6a08 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -497,14 +497,17 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) crtc_funcs = set->crtc->helper_private; + if (!set->mode) + set->fb = NULL; + if (set->fb) { DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", set->crtc->base.id, set->fb->base.id, (int)set->num_connectors, set->x, set->y); } else { - DRM_DEBUG_KMS("[CRTC:%d] [NOFB] #connectors=%d (x y) (%i %i)\n", - set->crtc->base.id, (int)set->num_connectors, - set->x, set->y); + DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); + set->mode = NULL; + set->num_connectors = 0; } dev = set->crtc->dev; |