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 Cc: Eric Anholt eric@anholt.net --- drivers/gpu/drm/vc4/vc4_crtc.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c index a479d3d..2bfa247 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