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

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

drivers/gpu/drm/vc4/vc4_crtc.c

+7 −0
Original line number Diff line number Diff line
@@ -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