[1/8] drm/mgag200: Enable caching for SHMEM pages

Commit Message

Thomas Zimmermann July 15, 2020, 2:58 p.m. UTC

SHMEM pages use write-combine caching by default, but can also use the
platform's default page caching. Doing so may improve the performance
of I/O on the framebuffer.

Mgag200's hardware does not access framebuffer pages directly (i.e.,
via DMA), so enabling caching does not have an effect on consistency
of the framebuffer memory or the displayed data.

Signed-off-by: Thomas Zimmermann <[e-mail]>
---
 drivers/gpu/drm/mgag200/mgag200_drv.c | 1 +
 1 file changed, 1 insertion(+)

Patch

diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c
index e19660f4a637..7189c7745baf 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.c
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.c
@@ -36,6 +36,7 @@  static struct drm_driver mgag200_driver = {
 	.major = DRIVER_MAJOR,
 	.minor = DRIVER_MINOR,
 	.patchlevel = DRIVER_PATCHLEVEL,
+	.gem_create_object = drm_gem_shmem_create_object_cached,
 	DRM_GEM_SHMEM_DRIVER_OPS,
 };