[PATCH 1/6] drm/xe/migrate: Handle clear ccs logic for xe2 dgfx

[Akshata Jahagirdar]

For Xe2 dGPU, we clear the bo by modifying the VRAM using an
uncompressed pat index which then indirectly updates the
compression status as uncompressed i.e zeroed CCS.
So xe_migrate_clear() should be updated for BMG to not
emit CCS surf copy commands.

Signed-off-by: Akshata Jahagirdar <akshata.jahagirdar at intel.com>
---
 drivers/gpu/drm/xe/xe_device.h  | 5 +++++
 drivers/gpu/drm/xe/xe_migrate.c | 6 +++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_device.h b/drivers/gpu/drm/xe/xe_device.h
index 0a2a3e7fd402..c3093506c28c 100644
--- a/drivers/gpu/drm/xe/xe_device.h
+++ b/drivers/gpu/drm/xe/xe_device.h
@@ -144,6 +144,11 @@ static inline bool xe_device_has_flat_ccs(struct xe_device *xe)
 	return xe->info.has_flat_ccs;
 }
 
+static inline bool xe_device_needs_ccs_emit(struct xe_device *xe)
+{
+	return xe_device_has_flat_ccs(xe) && !(GRAPHICS_VER(xe) >= 20 && IS_DGFX(xe));
+}
+
 static inline bool xe_device_has_sriov(struct xe_device *xe)
 {
 	return xe->info.has_sriov;
diff --git a/drivers/gpu/drm/xe/xe_migrate.c b/drivers/gpu/drm/xe/xe_migrate.c
index fa23a7e7ec43..2fc2cf375b1e 100644
--- a/drivers/gpu/drm/xe/xe_migrate.c
+++ b/drivers/gpu/drm/xe/xe_migrate.c
@@ -420,7 +420,7 @@ struct xe_migrate *xe_migrate_init(struct xe_tile *tile)
 		return ERR_PTR(err);
 
 	if (IS_DGFX(xe)) {
-		if (xe_device_has_flat_ccs(xe))
+		if (xe_device_needs_ccs_emit(xe))
 			/* min chunk size corresponds to 4K of CCS Metadata */
 			m->min_chunk_size = SZ_4K * SZ_64K /
 				xe_device_ccs_bytes(xe, SZ_64K);
@@ -1034,7 +1034,7 @@ struct dma_fence *xe_migrate_clear(struct xe_migrate *m,
 					clear_system_ccs ? 0 : emit_clear_cmd_len(gt), 0,
 					avail_pts);
 
-		if (xe_device_has_flat_ccs(xe))
+		if (xe_device_needs_ccs_emit(xe))
 			batch_size += EMIT_COPY_CCS_DW;
 
 		/* Clear commands */
@@ -1062,7 +1062,7 @@ struct dma_fence *xe_migrate_clear(struct xe_migrate *m,
 		if (!clear_system_ccs)
 			emit_clear(gt, bb, clear_L0_ofs, clear_L0, XE_PAGE_SIZE, clear_vram);
 
-		if (xe_device_has_flat_ccs(xe)) {
+		if (xe_device_needs_ccs_emit(xe)) {
 			emit_copy_ccs(gt, bb, clear_L0_ofs, true,
 				      m->cleared_mem_ofs, false, clear_L0);
 			flush_flags = MI_FLUSH_DW_CCS;
-- 
2.34.1