1# SPDX-License-Identifier: GPL-2.0-only 2config DRM_MGAG200 3 tristate "Matrox G200" 4 depends on DRM && PCI && MMU 5 select DRM_GEM_SHMEM_HELPER 6 select DRM_KMS_HELPER 7 select I2C 8 select I2C_ALGOBIT 9 help 10 This is a KMS driver for Matrox G200 chips. It supports the original 11 MGA G200 desktop chips and the server variants. It requires 0.3.0 12 of the modesetting userspace driver, and a version of mga driver 13 that will fail on KMS enabled devices. 14 15config DRM_MGAG200_IOBURST_WORKAROUND 16 bool "Disable buffer caching" 17 depends on DRM_MGAG200 && PREEMPT_RT && X86 18 help 19 Enable a workaround to avoid I/O bursts within the mgag200 driver at 20 the expense of overall display performance. 21 It restores the <v5.10 behavior, by mapping the framebuffer in system 22 RAM as Write-Combining, and flushing the cache after each write. 23 This is only useful on x86_64 if you want to run processes with 24 deterministic latency. 25 If unsure, say N. 26