linux-kernel - [PATCH 2/3] drm/hisilicon: hibmc: Don't overwrite fb helper surface depth

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Date:   Sat, 22 Sep 2018 01:25:26 +0800
From:   John Garry <john.garry@...wei.com>
To:     <z.liuxinliang@...ilicon.com>, <kong.kongxinwei@...ilicon.com>,
        <puck.chen@...ilicon.com>, <airlied@...ux.ie>
CC:     <linuxarm@...wei.com>, <chris@...is-wilson.co.uk>,
        <dri-devel@...ts.freedesktop.org>, <baowenyi@...wei.com>,
        <linux-kernel@...r.kernel.org>, <zourongrong@...il.com>,
        <daniel.vetter@...ll.ch>, John Garry <john.garry@...wei.com>
Subject: [PATCH 2/3] drm/hisilicon: hibmc: Don't overwrite fb helper surface depth

Currently the driver overwrites the surface depth provided by the fb
helper to give an invalid bpp/surface depth combination.

This has been exposed by commit 70109354fed2 ("drm: Reject unknown legacy
bpp and depth for drm_mode_addfb ioctl"), which now causes the driver to
fail to probe.

Fix by not overwriting the surface depth.

Fixes: d1667b86795a ("drm/hisilicon/hibmc: Add support for frame buffer")
Signed-off-by: John Garry <john.garry@...wei.com>
---
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
index 8bd2907..edcca17 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
@@ -71,7 +71,6 @@ static int hibmc_drm_fb_create(struct drm_fb_helper *helper,
 	DRM_DEBUG_DRIVER("surface width(%d), height(%d) and bpp(%d)\n",
 			 sizes->surface_width, sizes->surface_height,
 			 sizes->surface_bpp);
-	sizes->surface_depth = 32;
 
 	bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
 
-- 
1.9.1