From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 2 Sep 2011 14:23:09 +0000 (+0000)
Subject: drm/radeon/kms: fix DP detect and EDID fetch for DP bridges
X-Git-Tag: v3.1-rc6~1^2~2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=b06947b50053f2d21ad8ddf218cdb64fc8026896

drm/radeon/kms: fix DP detect and EDID fetch for DP bridges

Sink type is always DP for DP bridges and EDID fetch on
DP bridges is always i2c over aux rather than plain i2c.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 4f0c1ecac72e..c4b8741dbf58 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -1297,12 +1297,33 @@ radeon_dp_detect(struct drm_connector *connector, bool force)
 		if (!radeon_dig_connector->edp_on)
 			atombios_set_edp_panel_power(connector,
 						     ATOM_TRANSMITTER_ACTION_POWER_OFF);
-	} else {
-		/* need to setup ddc on the bridge */
-		if (radeon_connector_encoder_is_dp_bridge(connector)) {
+	} else if (radeon_connector_encoder_is_dp_bridge(connector)) {
+		/* DP bridges are always DP */
+		radeon_dig_connector->dp_sink_type = CONNECTOR_OBJECT_ID_DISPLAYPORT;
+		/* get the DPCD from the bridge */
+		radeon_dp_getdpcd(radeon_connector);
+
+		if (radeon_hpd_sense(rdev, radeon_connector->hpd.hpd))
+			ret = connector_status_connected;
+		else {
+			/* need to setup ddc on the bridge */
 			if (encoder)
 				radeon_atom_ext_encoder_setup_ddc(encoder);
+			if (radeon_ddc_probe(radeon_connector,
+					     radeon_connector->requires_extended_probe))
+				ret = connector_status_connected;
+		}
+
+		if ((ret == connector_status_disconnected) &&
+		    radeon_connector->dac_load_detect) {
+			struct drm_encoder *encoder = radeon_best_single_encoder(connector);
+			struct drm_encoder_helper_funcs *encoder_funcs;
+			if (encoder) {
+				encoder_funcs = encoder->helper_private;
+				ret = encoder_funcs->detect(encoder, connector);
+			}
 		}
+	} else {
 		radeon_dig_connector->dp_sink_type = radeon_dp_getsinktype(radeon_connector);
 		if (radeon_hpd_sense(rdev, radeon_connector->hpd.hpd)) {
 			ret = connector_status_connected;
@@ -1318,16 +1339,6 @@ radeon_dp_detect(struct drm_connector *connector, bool force)
 					ret = connector_status_connected;
 			}
 		}
-
-		if ((ret == connector_status_disconnected) &&
-		    radeon_connector->dac_load_detect) {
-			struct drm_encoder *encoder = radeon_best_single_encoder(connector);
-			struct drm_encoder_helper_funcs *encoder_funcs;
-			if (encoder) {
-				encoder_funcs = encoder->helper_private;
-				ret = encoder_funcs->detect(encoder, connector);
-			}
-		}
 	}
 
 	radeon_connector_update_scratch_regs(connector, ret);
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 1a858944e4f3..6cc17fb96a57 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -707,16 +707,21 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
 		radeon_router_select_ddc_port(radeon_connector);
 
 	if ((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) ||
-	    (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP)) {
+	    (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) ||
+	    radeon_connector_encoder_is_dp_bridge(&radeon_connector->base)) {
 		struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;
+
 		if ((dig->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT ||
 		     dig->dp_sink_type == CONNECTOR_OBJECT_ID_eDP) && dig->dp_i2c_bus)
-			radeon_connector->edid = drm_get_edid(&radeon_connector->base, &dig->dp_i2c_bus->adapter);
-	}
-	if (!radeon_connector->ddc_bus)
-		return -1;
-	if (!radeon_connector->edid) {
-		radeon_connector->edid = drm_get_edid(&radeon_connector->base, &radeon_connector->ddc_bus->adapter);
+			radeon_connector->edid = drm_get_edid(&radeon_connector->base,
+							      &dig->dp_i2c_bus->adapter);
+		else if (radeon_connector->ddc_bus && !radeon_connector->edid)
+			radeon_connector->edid = drm_get_edid(&radeon_connector->base,
+							      &radeon_connector->ddc_bus->adapter);
+	} else {
+		if (radeon_connector->ddc_bus && !radeon_connector->edid)
+			radeon_connector->edid = drm_get_edid(&radeon_connector->base,
+							      &radeon_connector->ddc_bus->adapter);
 	}
 
 	if (!radeon_connector->edid) {