[PATCH 1/3] drm/exynos: don't commit if plane scaling is required

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan at collabora.co.uk>

exynos doesn't show scaled planes properly on the screen so
disable the feature and show a message to the user.

Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_mixer.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 2e3bc57..a95fe84 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -550,6 +550,12 @@ static void mixer_graph_buffer(struct mixer_context *ctx, int win)
 		fmt = ARGB8888;
 	}
 
+	if (win_data->crtc_width != win_data->src_width ||
+	    win_data->crtc_height != win_data->src_height) {
+		DRM_DEBUG_KMS("plane scaling not supported\n");
+		return;
+	}
+
 	/* 2x scaling feature */
 	x_ratio = 0;
 	y_ratio = 0;
-- 
2.1.0