linux-kernel - [PATCH 4.16 42/72] drm/vc4: Fix scaling of uni-planar formats

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Date:   Mon, 14 May 2018 08:48:59 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        Eric Anholt <eric@...olt.net>
Subject: [PATCH 4.16 42/72] drm/vc4: Fix scaling of uni-planar formats

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Boris Brezillon <boris.brezillon@...tlin.com>

commit 9a0e9802217291e54c4dd1fc5462f189a4be14ec upstream.

When using uni-planar formats (like RGB), the scaling parameters are
stored in plane 0, not plane 1.

Fixes: fc04023fafec ("drm/vc4: Add support for YUV planes.")
Cc: stable@...r.kernel.org
Signed-off-by: Boris Brezillon <boris.brezillon@...tlin.com>
Reviewed-by: Eric Anholt <eric@...olt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20180507121303.5610-1-boris.brezillon@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/vc4/vc4_plane.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -557,7 +557,7 @@ static int vc4_plane_mode_set(struct drm
 	 * the scl fields here.
 	 */
 	if (num_planes == 1) {
-		scl0 = vc4_get_scl_field(state, 1);
+		scl0 = vc4_get_scl_field(state, 0);
 		scl1 = scl0;
 	} else {
 		scl0 = vc4_get_scl_field(state, 1);