| # 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_IOBURST_WORKAROUND |
| bool "Disable buffer caching" |
| depends on DRM_MGAG200 && PREEMPT_RT && X86 |
| 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. |
