From: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Tue, 5 Jan 2016 09:43:18 +0000 (+0200)
Subject: drm/omap: verify that display x-res is divisible by 8
X-Git-Tag: next-20160307~69^2^2~49
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2158f2c7fe7638040034135e934f89cb2e018625;p=karo-tx-linux.git

drm/omap: verify that display x-res is divisible by 8

DISPC requires the x resolution to be divisible by 8 when stall mode is
not used.

Add a check to the DPI driver to verify this.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---

diff --git a/drivers/gpu/drm/omapdrm/dss/dpi.c b/drivers/gpu/drm/omapdrm/dss/dpi.c
index 7953e6a52346..557cf3bdcc4e 100644
--- a/drivers/gpu/drm/omapdrm/dss/dpi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dpi.c
@@ -513,6 +513,9 @@ static int dpi_check_timings(struct omap_dss_device *dssdev,
 	struct dpi_clk_calc_ctx ctx;
 	bool ok;
 
+	if (timings->x_res % 8 != 0)
+		return -EINVAL;
+
 	if (mgr && !dispc_mgr_timings_ok(mgr->id, timings))
 		return -EINVAL;