drm/ast: Allocate cursor BOs at high end of video memory
authorThomas Zimmermann <tzimmermann@suse.de>
Fri, 27 Sep 2019 09:03:09 +0000 (11:03 +0200)
committerThomas Zimmermann <tzimmermann@suse.de>
Fri, 4 Oct 2019 08:00:21 +0000 (10:00 +0200)
commit0090ef3ecbd4ff176cb793f26d99cd29772cea57
tree61f4071b1a074a3a37e510b550a942a0490886f7
parent659d1a49c63d7e12f876404368c6830d0605ffd4
drm/ast: Allocate cursor BOs at high end of video memory

By putting cursor BOs at the high end of the video memory, we can avoid
memory fragmentation. Starting at the low end, contiguous video memory is
available for framebuffers.

The patch also simplifies the buffer swapping by splitting
struct ast_private.cursor_cache BO into two separate boffer objects. Cursor
images alternate between these buffers instead of offsets within cursor_cache.

v3:
* fixes space-before-tab error near AST_HWC_SIGNATURE_CHECKSUM

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190927090309.10254-6-tzimmermann@suse.de
drivers/gpu/drm/ast/ast_drv.h
drivers/gpu/drm/ast/ast_mode.c