From 6f86fc8c0018f266fcf519e4a07cd7f45ab7bef6 Mon Sep 17 00:00:00 2001
From: Wyon Bi <bivvy.bi@rock-chips.com>
Date: Wed, 14 Aug 2019 14:30:55 +0800
Subject: [PATCH] drm/rockchip: cdn-dp: Reject non-32-bits-aligned mode widths

Change-Id: I8f6b94baef9fd5db2090e36dc8974769b7d469f7
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
---
 drivers/gpu/drm/rockchip/cdn-dp-core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c b/drivers/gpu/drm/rockchip/cdn-dp-core.c
index 3514f230d315..30104912e249 100644
--- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
@@ -313,6 +313,9 @@ static int cdn_dp_connector_mode_valid(struct drm_connector *connector,
 		break;
 	}
 
+	if (!IS_ALIGNED(mode->hdisplay * bpc * 3, 32))
+		return MODE_H_ILLEGAL;
+
 	requested = mode->clock * bpc * 3 / 1000;
 
 	source_max = dp->lanes;