drm/ast: Fixed system hanged if disable P2A

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[ Upstream commit 6c971c09f3 ]

The original ast driver will access some BMC configuration through P2A bridge
that can be disabled since AST2300 and after.
It will cause system hanged if P2A bridge is disabled.
Here is the update to fix it.

Signed-off-by: Y.C. Chen <yc_chen@aspeedtech.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Y.C. Chen 2017-01-26 09:45:40 +08:00 • committed by Greg Kroah-Hartman

parent bfa4d2e461

commit 47c362f147

3 changed files with 97 additions and 79 deletions

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1

drivers/gpu/drm/ast/ast_drv.h

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157

drivers/gpu/drm/ast/ast_main.c

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18

drivers/gpu/drm/ast/ast_post.c

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