diff options
Diffstat (limited to 'drivers/gpu/drm/mgag200/Kconfig')
| -rw-r--r-- | drivers/gpu/drm/mgag200/Kconfig | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/drivers/gpu/drm/mgag200/Kconfig b/drivers/gpu/drm/mgag200/Kconfig index 5e4d48df4854..3096944a8f0a 100644 --- a/drivers/gpu/drm/mgag200/Kconfig +++ b/drivers/gpu/drm/mgag200/Kconfig @@ -12,14 +12,12 @@ config DRM_MGAG200 of the modesetting userspace driver, and a version of mga driver that will fail on KMS enabled devices. -config DRM_MGAG200_IOBURST_WORKAROUND - bool "Disable buffer caching" - depends on DRM_MGAG200 && PREEMPT_RT && X86 +config DRM_MGAG200_DISABLE_WRITECOMBINE + bool "Disable Write Combine mapping of VRAM" + depends on DRM_MGAG200 && PREEMPT_RT help - Enable a workaround to avoid I/O bursts within the mgag200 driver at - the expense of overall display performance. - It restores the <v5.10 behavior, by mapping the framebuffer in system - RAM as Write-Combining, and flushing the cache after each write. - This is only useful on x86_64 if you want to run processes with - deterministic latency. - If unsure, say N. + 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.
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