drm/amd/display: Block timing sync for different signals in PMO

PMO assumes that like timings can be synchronized, but DC only allows
this if the signal types match.
Reviewed-by: Austin Zheng <austin.zheng@amd.com>
Signed-off-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 29d3d6af)
Cc: stable@vger.kernel.org

drivers/gpu/drm/amd/display/dc/dml2/dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c

@@ -811,7 +811,8 @@ static void build_synchronized_timing_groups(
 		for (j = i + 1; j < display_config->display_config.num_streams; j++) {
 			if (memcmp(master_timing,
 				&display_config->display_config.stream_descriptors[j].timing,
-				sizeof(struct dml2_timing_cfg)) == 0) {
+				sizeof(struct dml2_timing_cfg)) == 0 &&
+				display_config->display_config.stream_descriptors[i].output.output_encoder == display_config->display_config.stream_descriptors[j].output.output_encoder) {
 				set_bit_in_bitfield(&pmo->scratch.pmo_dcn4.synchronized_timing_group_masks[timing_group_idx], j);
 				set_bit_in_bitfield(&stream_mapped_mask, j);
 			}