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| author | Stefan Agner <stefan@agner.ch> | 2020-09-08 16:16:54 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-29 10:07:38 +0100 |
| commit | 453ed3d7f9909e236183eacb2c357974a14cf940 (patch) | |
| tree | e667632690b50b98cb6957ddb0c7aa78550fc407 /security | |
| parent | dec5fabe7202c9fcdc83967af356a0f035244263 (diff) | |
drm: mxsfb: check framebuffer pitch
[ Upstream commit d5a0c816900419105a12e7471bf074319dfa34be ]
The lcdif IP does not support a framebuffer pitch (stride) other than
framebuffer width. Check for equality and reject the framebuffer
otherwise.
This prevents a distorted picture when using 640x800 and running the
Mesa graphics stack. Mesa tries to use a cache aligned stride, which
leads at that particular resolution to width != stride. Currently
Mesa has no fallback behavior, but rejecting this configuration allows
userspace to handle the issue correctly.
Fixes: 45d59d704080 ("drm: Add new driver for MXSFB controller")
Signed-off-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200908141654.266836-1-stefan@agner.ch
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions