Commit ef6223dc authored by Inki Dae's avatar Inki Dae
Browse files

drm/exynos: check crtc's dpms mode at page flip 



when page flip is requested, crtc's dpms mode should be on.
if not on, return -EINVAL so that it doesn't access hardware.

Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
parent 471d60fe

drivers/gpu/drm/exynos/exynos_drm_crtc.c

+6 −0
Original line number Diff line number Diff line
@@ -207,6 +207,12 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc, 


	DRM_DEBUG_KMS("%s\n", __FILE__);



	/* when the page flip is requested, crtc's dpms should be on */

	if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {

		DRM_ERROR("failed page flip request.\n");

		return -EINVAL;

	}



	mutex_lock(&dev->struct_mutex);



	if (event) {

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