drm/amdgpu: fix random data corruption for sdma 7

There is random data corruption caused by const fill, this is caused by
write compression mode not correctly configured.

So correct compression mode for const fill.

Signed-off-by: Frank Min <Frank.Min@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c

@@ -51,6 +51,12 @@ MODULE_FIRMWARE("amdgpu/sdma_7_0_1.bin");
 #define SDMA0_HYP_DEC_REG_END 0x589a
 #define SDMA1_HYP_DEC_REG_OFFSET 0x20
 
+/*define for compression field for sdma7*/
+#define SDMA_PKT_CONSTANT_FILL_HEADER_compress_offset 0
+#define SDMA_PKT_CONSTANT_FILL_HEADER_compress_mask   0x00000001
+#define SDMA_PKT_CONSTANT_FILL_HEADER_compress_shift  16
+#define SDMA_PKT_CONSTANT_FILL_HEADER_COMPRESS(x) (((x) & SDMA_PKT_CONSTANT_FILL_HEADER_compress_mask) << SDMA_PKT_CONSTANT_FILL_HEADER_compress_shift)
+
 static const struct amdgpu_hwip_reg_entry sdma_reg_list_7_0[] = {
 	SOC15_REG_ENTRY_STR(GC, 0, regSDMA0_STATUS_REG),
 	SOC15_REG_ENTRY_STR(GC, 0, regSDMA0_STATUS1_REG),
@@ -1720,7 +1726,8 @@ static void sdma_v7_0_emit_fill_buffer(struct amdgpu_ib *ib,
 				       uint64_t dst_offset,
 				       uint32_t byte_count)
 {
-	ib->ptr[ib->length_dw++] = SDMA_PKT_COPY_LINEAR_HEADER_OP(SDMA_OP_CONST_FILL);
+	ib->ptr[ib->length_dw++] = SDMA_PKT_CONSTANT_FILL_HEADER_OP(SDMA_OP_CONST_FILL) |
+		SDMA_PKT_CONSTANT_FILL_HEADER_COMPRESS(1);
 	ib->ptr[ib->length_dw++] = lower_32_bits(dst_offset);
 	ib->ptr[ib->length_dw++] = upper_32_bits(dst_offset);
 	ib->ptr[ib->length_dw++] = src_data;