drm/gem: Clear mapping addresses for unused framebuffer planes

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Set the returned mapping address to NULL if a framebuffer plane does
not have a BO associated with it. Likewise, ignore mappings of NULL
during framebuffer unmap operations. Allows users of the functions to
perform unmap operations of certain BOs by themselfes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730183511.20080-4-tzimmermann@suse.de

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Thomas Zimmermann 2021-07-30 20:35:09 +02:00

parent f6424ecdb3

commit 0ec77bd92b

1 changed files with 5 additions and 1 deletions

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drivers/gpu/drm/drm_gem_framebuffer_helper.c

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