On 13/09/2024 12:47, Maarten Lankhorst wrote:
Add the scanout flag to force WC caching, and add the memory barrier
where needed.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/xe/display/xe_dsb_buffer.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/xe/display/xe_dsb_buffer.c b/drivers/gpu/drm/xe/display/xe_dsb_buffer.c
index f99d901a3214f..f7949bf5426af 100644
--- a/drivers/gpu/drm/xe/display/xe_dsb_buffer.c
+++ b/drivers/gpu/drm/xe/display/xe_dsb_buffer.c
@@ -48,11 +48,12 @@ bool intel_dsb_buffer_create(struct intel_crtc *crtc, struct intel_dsb_buffer *d
if (!vma)
return false;
+ /* Set scanout flag for WC mapping */
obj = xe_bo_create_pin_map(xe, xe_device_get_root_tile(xe),
NULL, PAGE_ALIGN(size),
ttm_bo_type_kernel,
XE_BO_FLAG_VRAM_IF_DGFX(xe_device_get_root_tile(xe)) |
- XE_BO_FLAG_GGTT);
+ XE_BO_FLAG_SCANOUT | XE_BO_FLAG_GGTT);
if (IS_ERR(obj)) {
kfree(vma);
return false;
@@ -73,5 +74,5 @@ void intel_dsb_buffer_cleanup(struct intel_dsb_buffer *dsb_buf)
void intel_dsb_buffer_flush_map(struct intel_dsb_buffer *dsb_buf)
{
- /* TODO: add xe specific flush_map() for dsb buffer object. */
+ xe_device_wmb(dsb_buf->vma->bo->tile->xe);
Kind of orthogonal, but we could maybe also move the l2 flush here? I
assume it's better to flush once at the end.
Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>
}
