drm/armada: fix YUV planar format framebuffer offsets

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>

diff --git a/drivers/gpu/drm/armada/armada_crtc.c b/drivers/gpu/drm/armada/armada_crtc.c
index 7f7b3e7..a0f4d2a 100644 (file)
--- 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 *addrs, struct drm_framebuffer *fb,
        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++)