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17 May 2024, 11:00:25 UTC
Revision 5478ad10e7850ce3d8b7056db05ddfa3c9ddad9a authored by Thomas Zimmermann on 15 November 2018, 10:42:16 UTC, committed by Dave Airlie on 18 November 2018, 23:50:02 UTC 
drm/ast: Remove existing framebuffers before loading driver
 
If vesafb attaches to the AST device, it configures the framebuffer memory
for uncached access by default. When ast.ko later tries to attach itself to
the device, it wants to use write-combining on the framebuffer memory, but
vesefb's existing configuration for uncached access takes precedence. This
results in reduced performance.

Removing the framebuffer's configuration before loding the AST driver fixes
the problem. Other DRM drivers already contain equivalent code.

Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1112963
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: <stable@vger.kernel.org>
Tested-by: Y.C. Chen <yc_chen@aspeedtech.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Tested-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
1 parent 9ff0119
History
Tip revision: 5478ad10e7850ce3d8b7056db05ddfa3c9ddad9a authored by Thomas Zimmermann on 15 November 2018, 10:42:16 UTC
drm/ast: Remove existing framebuffers before loading driver
Tip revision: 5478ad1
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