From: Fangzhi Zuo <Jerry.Zuo@amd.com>
Date: Mon, 23 Sep 2024 20:20:40 +0000 (-0400)
Subject: drm/amd/display: Skip Invalid Streams from DSC Policy
X-Git-Tag: v6.13-rc1~122^2~15^2~134
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9afeda04964281e9f708b92c2a9c4f8a1387b46e;p=thirdparty%2Fkernel%2Flinux.git

drm/amd/display: Skip Invalid Streams from DSC Policy

Streams with invalid new connector state should be elimiated from
dsc policy.

Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Signed-off-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 68bd8e6b948de..32b025c92c63c 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -1120,6 +1120,7 @@ static int compute_mst_dsc_configs_for_link(struct drm_atomic_state *state,
 	int i, k, ret;
 	bool debugfs_overwrite = false;
 	uint16_t fec_overhead_multiplier_x1000 = get_fec_overhead_multiplier(dc_link);
+	struct drm_connector_state *new_conn_state;
 
 	memset(params, 0, sizeof(params));
 
@@ -1127,7 +1128,7 @@ static int compute_mst_dsc_configs_for_link(struct drm_atomic_state *state,
 		return PTR_ERR(mst_state);
 
 	/* Set up params */
-	DRM_DEBUG_DRIVER("%s: MST_DSC Set up params for %d streams\n", __func__, dc_state->stream_count);
+	DRM_DEBUG_DRIVER("%s: MST_DSC Try to set up params from %d streams\n", __func__, dc_state->stream_count);
 	for (i = 0; i < dc_state->stream_count; i++) {
 		struct dc_dsc_policy dsc_policy = {0};
 
@@ -1143,6 +1144,14 @@ static int compute_mst_dsc_configs_for_link(struct drm_atomic_state *state,
 		if (!aconnector->mst_output_port)
 			continue;
 
+		new_conn_state = drm_atomic_get_new_connector_state(state, &aconnector->base);
+
+		if (!new_conn_state) {
+			DRM_DEBUG_DRIVER("%s:%d MST_DSC Skip the stream 0x%p with invalid new_conn_state\n",
+					__func__, __LINE__, stream);
+			continue;
+		}
+
 		stream->timing.flags.DSC = 0;
 
 		params[count].timing = &stream->timing;
@@ -1175,6 +1184,8 @@ static int compute_mst_dsc_configs_for_link(struct drm_atomic_state *state,
 		count++;
 	}
 
+	DRM_DEBUG_DRIVER("%s: MST_DSC Params set up for %d streams\n", __func__, count);
+
 	if (count == 0) {
 		ASSERT(0);
 		return 0;