[PATCH v5 3/4] drm/xe/migrate: Clear CCS when clearing bo on xe2

[Nirmoy Das]

Clearing bo with uncompress PTE will trigger a CCS clearing as well
for XE2, so skip emit_copy_ccs() when on xe2 when clearing bo.

v2: When clearing BO, CCS clear happens with all command as long
    as PTEs are uncompress.

Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray at intel.com>
Cc: Matthew Auld <matthew.auld at intel.com>
Cc: "Thomas Hellström" <thomas.hellstrom at linux.intel.com>
Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>
---
 drivers/gpu/drm/xe/xe_migrate.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_migrate.c b/drivers/gpu/drm/xe/xe_migrate.c
index e0a3f6921572..cc8beed2bf8e 100644
--- a/drivers/gpu/drm/xe/xe_migrate.c
+++ b/drivers/gpu/drm/xe/xe_migrate.c
@@ -1061,7 +1061,8 @@ struct dma_fence *xe_migrate_clear(struct xe_migrate *m,
 		if (clear_vram && xe_migrate_allow_identity(clear_L0, &src_it))
 			xe_res_next(&src_it, clear_L0);
 		else
-			emit_pte(m, bb, clear_L0_pt, clear_vram, clear_ccs,
+			/* Use uncompressed pte so clear happens in the real memory. */
+			emit_pte(m, bb, clear_L0_pt, clear_vram, false,
 				 &src_it, clear_L0, dst);
 
 		bb->cs[bb->len++] = MI_BATCH_BUFFER_END;
@@ -1070,7 +1071,9 @@ struct dma_fence *xe_migrate_clear(struct xe_migrate *m,
 		if (clear_bo_data)
 			emit_clear(gt, bb, clear_L0_ofs, clear_L0, XE_PAGE_SIZE, clear_vram);
 
-		if (xe_device_has_flat_ccs(xe)) {
+		/* Clearing BO with uncompress PTE will clear CCS metadata as well on XE2 */
+		if (xe_device_has_flat_ccs(xe) && clear_ccs &&
+		    !(clear_bo_data && GRAPHICS_VERx100(gt_to_xe(gt)) >= 2000)) {
 			emit_copy_ccs(gt, bb, clear_L0_ofs, true,
 				      m->cleared_mem_ofs, false, clear_L0);
 			flush_flags = MI_FLUSH_DW_CCS;
-- 
2.42.0