xserver/hw/xfree86/drivers
Aaron Plattner 617f591fc4 modesetting: Only use GAMMA_LUT if its size is 1024
GAMMA_LUT sizes other than 1024 cause a crash during startup if the memcpy()
calls in xf86RandR12CrtcSetGamma() read past the end of the legacy X11 /
XVidMode gamma ramp.

This is a problem on Intel ICL / GEN11 platforms because they report a GAMMA_LUT
size of 262145. Since it's not clear that the modesetting driver will generate a
proper gamma ramp at that size even if xf86RandR12CrtcSetGamma() is fixed, just
disable use of GAMMA_LUT for sizes other than 1024 for now. This will cause the
modesetting driver to disable the CTM property and fall back to the legacy gamma
LUT.

Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
Fixes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1193
Tested-by: Mark Herbert
2021-09-09 22:45:06 -07:00
..
inputtest Don't underlink inputtest on targets which require complete linkage 2021-09-01 13:57:40 +00:00
modesetting modesetting: Only use GAMMA_LUT if its size is 1024 2021-09-09 22:45:06 -07:00
Makefile.am xfree86: Implement a test input driver 2020-12-14 01:12:10 +00:00