[PATCH][V2] drm/amd/display: Remove unwanted drm edid references

[Alex Hung]

[WHY]
edid_override and drm_edid_override_connector_update, according to drm
documentation, should not be referred outside drm_edid.

[HOW]
Remove and replace them accordingly. This can tested by IGT's
kms_hdmi_inject test.

Signed-off-by: Alex Hung <alex.hung at amd.com>
---

V2 - add comments for drm_get_edid and check edid before use.

 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 44 +++++++++++--------
 1 file changed, 25 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 5efebc06296b..b29ef87c27a9 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6444,15 +6444,24 @@ amdgpu_dm_connector_late_register(struct drm_connector *connector)
 static void amdgpu_dm_connector_funcs_force(struct drm_connector *connector)
 {
 	struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
+	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
 	struct dc_link *dc_link = aconnector->dc_link;
 	struct dc_sink *dc_em_sink = aconnector->dc_em_sink;
 	struct edid *edid;
 
-	if (!connector->edid_override)
+	/*
+	 * Note: drm_get_edid gets edid in the following order:
+	 * 1) override EDID if set via edid_override debugfs,
+	 * 2) firmware EDID if set via edid_firmware module parameter
+	 * 3) regular DDC read.
+	 */
+	edid = drm_get_edid(connector, &amdgpu_connector->ddc_bus->aux.ddc);
+	if (!edid) {
+		DRM_ERROR("No EDID found on connector: %s, forcing to OFF!\n", connector->name);
+		connector->force = DRM_FORCE_OFF;
 		return;
+	}
 
-	drm_edid_override_connector_update(&aconnector->base);
-	edid = aconnector->base.edid_blob_ptr->data;
 	aconnector->edid = edid;
 
 	/* Update emulated (virtual) sink's EDID */
@@ -6487,30 +6496,27 @@ static int get_modes(struct drm_connector *connector)
 
 static void create_eml_sink(struct amdgpu_dm_connector *aconnector)
 {
+	struct drm_connector *connector = &aconnector->base;
+	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(&aconnector->base);
 	struct dc_sink_init_data init_params = {
 			.link = aconnector->dc_link,
 			.sink_signal = SIGNAL_TYPE_VIRTUAL
 	};
 	struct edid *edid;
 
-	if (!aconnector->base.edid_blob_ptr) {
-		/* if connector->edid_override valid, pass
-		 * it to edid_override to edid_blob_ptr
-		 */
-
-		drm_edid_override_connector_update(&aconnector->base);
-
-		if (!aconnector->base.edid_blob_ptr) {
-			DRM_ERROR("No EDID firmware found on connector: %s ,forcing to OFF!\n",
-					aconnector->base.name);
-
-			aconnector->base.force = DRM_FORCE_OFF;
-			return;
-		}
+	/*
+	 * Note: drm_get_edid gets edid in the following order:
+	 * 1) override EDID if set via edid_override debugfs,
+	 * 2) firmware EDID if set via edid_firmware module parameter
+	 * 3) regular DDC read.
+	 */
+	edid = drm_get_edid(connector, &amdgpu_connector->ddc_bus->aux.ddc);
+	if (!edid) {
+		DRM_ERROR("No EDID found on connector: %s, forcing to OFF!\n", connector->name);
+		connector->force = DRM_FORCE_OFF;
+		return;
 	}
 
-	edid = (struct edid *) aconnector->base.edid_blob_ptr->data;
-
 	aconnector->edid = edid;
 
 	aconnector->dc_em_sink = dc_link_add_remote_sink(
-- 
2.42.0