1 files changed, 4 insertions, 33 deletions

diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c
index 933648cc90ff..aaaf1906026c 100644
--- a/drivers/gpu/drm/i915/gt/intel_migrate.c
+++ b/drivers/gpu/drm/i915/gt/intel_migrate.c
@@ -511,44 +511,16 @@ static inline u32 *i915_flush_dw(u32 *cmd, u32 flags)
 	return cmd;
 }
 
-static u32 calc_ctrl_surf_instr_size(struct drm_i915_private *i915, int size)
-{
-	u32 num_cmds, num_blks, total_size;
-
-	if (!GET_CCS_BYTES(i915, size))
-		return 0;
-
-	/*
-	 * XY_CTRL_SURF_COPY_BLT transfers CCS in 256 byte
-	 * blocks. one XY_CTRL_SURF_COPY_BLT command can
-	 * transfer upto 1024 blocks.
-	 */
-	num_blks = DIV_ROUND_UP(GET_CCS_BYTES(i915, size),
-				NUM_CCS_BYTES_PER_BLOCK);
-	num_cmds = DIV_ROUND_UP(num_blks, NUM_CCS_BLKS_PER_XFER);
-	total_size = XY_CTRL_SURF_INSTR_SIZE * num_cmds;
-
-	/*
-	 * Adding a flush before and after XY_CTRL_SURF_COPY_BLT
-	 */
-	total_size += 2 * MI_FLUSH_DW_SIZE;
-
-	return total_size;
-}
-
 static int emit_copy_ccs(struct i915_request *rq,
 			 u32 dst_offset, u8 dst_access,
 			 u32 src_offset, u8 src_access, int size)
 {
 	struct drm_i915_private *i915 = rq->engine->i915;
 	int mocs = rq->engine->gt->mocs.uc_index << 1;
-	u32 num_ccs_blks, ccs_ring_size;
+	u32 num_ccs_blks;
 	u32 *cs;
 
-	ccs_ring_size = calc_ctrl_surf_instr_size(i915, size);
-	WARN_ON(!ccs_ring_size);
-
-	cs = intel_ring_begin(rq, round_up(ccs_ring_size, 2));
+	cs = intel_ring_begin(rq, 12);
 	if (IS_ERR(cs))
 		return PTR_ERR(cs);
 
@@ -583,8 +555,7 @@ static int emit_copy_ccs(struct i915_request *rq,
 		FIELD_PREP(XY_CTRL_SURF_MOCS_MASK, mocs);
 
 	cs = i915_flush_dw(cs, MI_FLUSH_DW_LLC | MI_FLUSH_DW_CCS);
-	if (ccs_ring_size & 1)
-		*cs++ = MI_NOOP;
+	*cs++ = MI_NOOP;
 
 	intel_ring_advance(rq, cs);
 
@@ -645,7 +616,7 @@ static u64 scatter_list_length(struct scatterlist *sg)
 	while (sg && sg_dma_len(sg)) {
 		len += sg_dma_len(sg);
 		sg = sg_next(sg);
-	};
+	}
 
 	return len;
 }