MIRRORS/linux-yocto
1
0
Fork 0
mirror of git://git.yoctoproject.org/linux-yocto.git synced 2025-08-22 00:42:01 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity
master
linux-yocto/drivers/gpu/drm/mgag200/Kconfig
Jocelyn Falempe b593ea9406 drm/mgag200: Add an option to disable Write-Combine 
Unfortunately, the G200 ioburst workaround doesn't work on some
servers like Dell poweredge XR11, XR5610, or HPE XL260. In this case
completely disabling WC is the only option to achieve low-latency.
So this adds a new Kconfig option to disable WC mapping of the G200.

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240517151050.624797-3-jfalempe@redhat.com
2024-05-21 09:38:47 +02:00

863 B
Raw Permalink Blame History

SPDX-License-Identifier: GPL-2.0-only

config DRM_MGAG200 tristate "Matrox G200" depends on DRM && PCI && MMU select DRM_GEM_SHMEM_HELPER select DRM_KMS_HELPER select I2C select I2C_ALGOBIT help This is a KMS driver for Matrox G200 chips. It supports the original MGA G200 desktop chips and the server variants. It requires 0.3.0 of the modesetting userspace driver, and a version of mga driver that will fail on KMS enabled devices.

config DRM_MGAG200_DISABLE_WRITECOMBINE bool "Disable Write Combine mapping of VRAM" depends on DRM_MGAG200 && PREEMPT_RT help The VRAM of the G200 is mapped with Write-Combine to improve performances. This can interfere with real-time tasks; even if they are running on other CPU cores than the graphics output. Enable this option only if you run realtime tasks on a server with a Matrox G200.