drm/ast: Avoid reprogramming primary-plane scanout address

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Some AST-based BMCs stop display output for up to 5 seconds after
reprogramming the scanout address. As the address is fixed, avoid
re-setting the address' value.

v2:
	* only update offset if it changed (Jocelyn)

Reported-by: Jocelyn Falempe <jfalempe@redhat.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Tested-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221013112923.769-9-tzimmermann@suse.de

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Thomas Zimmermann 2022-10-13 13:29:23 +02:00

parent f2fa5a99ca

commit 202fb33be3

1 changed files with 13 additions and 4 deletions

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17

drivers/gpu/drm/ast/ast_mode.c

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