[RFC 2/2] drm/msm/gem: Make use of the system cache

From: Georgi Djakov
Date: Tue Nov 16 2021 - 18:16:12 EST


Instead of writing to WC cmdstream buffers that go all the way to the main
memory, let's use the system cache to improve the performance.

Signed-off-by: Georgi Djakov <quic_c_gdjako@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/msm_gem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 104fdfc14027..921a1c24721e 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -214,7 +214,7 @@ void msm_gem_put_pages(struct drm_gem_object *obj)
static pgprot_t msm_gem_pgprot(struct msm_gem_object *msm_obj, pgprot_t prot)
{
if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
- return pgprot_writecombine(prot);
+ return pgprot_syscached(prot);
return prot;
}