Commit 36451467 authored by Mario Kleiner's avatar Mario Kleiner Committed by Eric Anholt

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: default avatarMario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent acc1be1d
......@@ -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
......
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