linux-kernel - [PATCH 4.19 146/148] drm/vc4: Set ->is_yuv to false when num

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Date:   Fri, 11 Jan 2019 15:15:24 +0100
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 4.19 146/148] drm/vc4: Set ->is_yuv to false when num_planes == 1

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

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

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

commit 2b02a05bdc3a62d36e0d0b015351897109e25991 upstream.

When vc4_plane_state is duplicated ->is_yuv is left assigned to its
previous value, and we never set it back to false when switching to
a non-YUV format.

Fix that by setting ->is_yuv to false in the 'num_planes == 1' branch
of the vc4_plane_setup_clipping_and_scaling() function.

Fixes: fc04023fafecf ("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/20181009132446.21960-1-boris.brezillon@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -322,6 +322,7 @@ static int vc4_plane_setup_clipping_and_
 		if (vc4_state->is_unity)
 			vc4_state->x_scaling[0] = VC4_SCALING_PPF;
 	} else {
+		vc4_state->is_yuv = false;
 		vc4_state->x_scaling[1] = VC4_SCALING_NONE;
 		vc4_state->y_scaling[1] = VC4_SCALING_NONE;
 	}