drm/vmwgfx: Filter modes which exceed graphics memory

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SVGA requires individual surfaces to fit within graphics memory
(max_mob_pages) which means that modes with a final buffer size that would
exceed graphics memory must be pruned otherwise creation will fail.

Additionally llvmpipe requires its buffer height and width to be a multiple
of its tile size which is 64. As a result we have to anticipate that
llvmpipe will round up the mode size passed to it by the compositor when
it creates buffers and filter modes where this rounding exceeds graphics
memory.

This fixes an issue where VMs with low graphics memory (< 64MiB) configured
with high resolution mode boot to a black screen because surface creation
fails.

Fixes: d947d1b71d ("drm/vmwgfx: Add and connect connector helper function")
Signed-off-by: Ian Forbes <ian.forbes@broadcom.com>
Signed-off-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240521184720.767-2-ian.forbes@broadcom.com

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Ian Forbes 2024-05-21 13:47:17 -05:00 • committed by Zack Rusin

parent 629f2b4e05

commit 4268269331

1 changed files with 43 additions and 2 deletions

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drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c

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