drm/vc4: Add exec flags to allow forcing a specific X/Y tile walk order.

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This is useful to allow GL to provide defined results for overlapping
glBlitFramebuffer, which X11 in turn uses to accelerate uncomposited
window movement without first blitting to a temporary.  x11perf
-copywinwin100 goes from 1850/sec to 4850/sec.

v2: Default to the same behavior as before when the flags aren't
    passed. (suggested by Boris)

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20170725162733.28007-2-eric@anholt.net
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>

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This commit is contained in:

Eric Anholt 2017-07-25 09:27:33 -07:00

parent fb95992af1

commit 3be8eddd9d

4 changed files with 32 additions and 6 deletions

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11

include/uapi/drm/vc4_drm.h

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