diff options
| author | Mario Kleiner | 2016-07-19 20:58:59 +0200 |
|---|---|---|
| committer | Eric Anholt | 2016-08-19 19:05:52 -0700 |
| commit | 3645146706f716be7ef2b88ebcc26f7f1fc4e4aa (patch) | |
| tree | f33b7583717a7c7958eb8b012825b43a1f70a52c /drivers/gpu/drm/vc4/vc4_crtc.c | |
| parent | acc1be1d351e8d5c0c8d14dad904ae0e39fc3653 (diff) | |
drm/vc4: Reject doublescan modes.
We can't handle doublescan modes at the moment, so if
userspace tries to set one, reject the mode set.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_crtc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c index a479d3d840c5..2bfa2470e66b 100644 --- a/drivers/gpu/drm/vc4/vc4_crtc.c +++ b/drivers/gpu/drm/vc4/vc4_crtc.c @@ -536,6 +536,13 @@ static bool vc4_crtc_mode_fixup(struct drm_crtc *crtc, const struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { + /* Do not allow doublescan modes from user space */ + if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) { + DRM_DEBUG_KMS("[CRTC:%d] Doublescan mode rejected.\n", + crtc->base.id); + return false; + } + /* * Interlaced video modes got CRTC_INTERLACE_HALVE_V applied when * coming from user space. We don't want this, as it screws up |