From: Russell King <rmk+kernel@armlinux.org.uk>
Date: Fri, 8 Dec 2017 12:16:22 +0000
Subject: drm/armada: fix YUV planar format framebuffer offsets
Git-commit: de0ea9ad2f548dd9e555cac27cf7ade1db5b26ea
Patch-mainline: v4.15-rc7
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

We weren't correctly calculating the YUV planar offsets for subsampled
chroma planes correctly - fix up the coordinates for planes 1 and 2.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/armada/armada_crtc.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/armada/armada_crtc.c
+++ b/drivers/gpu/drm/armada/armada_crtc.c
@@ -176,7 +176,13 @@ void armada_drm_plane_calc_addrs(u32 *ad
 	if (num_planes > 3)
 		num_planes = 3;
 
-	for (i = 0; i < num_planes; i++)
+	addrs[0] = addr + fb->offsets[0] + y * fb->pitches[0] +
+		   x * format->cpp[0];
+
+	y /= format->vsub;
+	x /= format->hsub;
+
+	for (i = 1; i < num_planes; i++)
 		addrs[i] = addr + fb->offsets[i] + y * fb->pitches[i] +
 			     x * format->cpp[i];
 	for (; i < 3; i++)