From: Thierry Reding <tred...@nvidia.com>
Instead of going through the DMA mapping API for cache maintenance, use
the drm_clflush_*() family of functions to achieve the same effect.
Cc: Rob Clark <robdclark at gmail.com>
Signed-off-by: Thierry Reding <treding at nvidia.com>
---
drivers/gpu/drm/msm/Kconfig | 1 +
drivers/gpu/drm/msm/msm_gem.c | 9 +--------
2 files changed, 2 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig
index 0a6f6764a37c..5da7fe793e89 100644
--- a/drivers/gpu/drm/msm/Kconfig
+++ b/drivers/gpu/drm/msm/Kconfig
@@ -5,6 +5,7 @@ config DRM_MSM
depends on ARCH_QCOM || (ARM && COMPILE_TEST)
depends on OF && COMMON_CLK
select REGULATOR
+ select DRM_CACHE
select DRM_KMS_HELPER
select DRM_PANEL
select SHMEM
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 52839769eb6c..ce265085fc57 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -101,8 +101,7 @@ static struct page **get_pages(struct drm_gem_object *obj)
* because display controller, GPU, etc. are not coherent:
*/
if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
- dma_map_sg(dev->dev, msm_obj->sgt->sgl,
- msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
+ drm_clflush_sg(msm_obj->sgt);
}
return msm_obj->pages;
@@ -113,12 +112,6 @@ static void put_pages(struct drm_gem_object *obj)
struct msm_gem_object *msm_obj = to_msm_bo(obj);
if (msm_obj->pages) {
- /* For non-cached buffers, ensure the new pages are clean
- * because display controller, GPU, etc. are not coherent:
- */
- if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
- dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl,
- msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
sg_free_table(msm_obj->sgt);
kfree(msm_obj->sgt);
--
2.3.2
