drm/radeon/kms: unify i2c handling

Previously we added i2c buses as needed when enumerating connectors
power management, etc.  This only exposed the actual buses used and
could have lead to the same buse getting created more than once if
one buses was used for more than one purpose.  This patch sets up
all i2c buses on the card in one place and users of the buses just
point back to the one instance.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 10 insertions, 21 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 2395c8600cf4..185a6d962b72 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -518,8 +518,6 @@ static void radeon_connector_destroy(struct drm_connector *connector)
 {
 	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
 
-	if (radeon_connector->ddc_bus)
-		radeon_i2c_destroy(radeon_connector->ddc_bus);
 	if (radeon_connector->edid)
 		kfree(radeon_connector->edid);
 	kfree(radeon_connector->con_priv);
@@ -955,8 +953,6 @@ static void radeon_dp_connector_destroy(struct drm_connector *connector)
 	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
 	struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv;
 
-	if (radeon_connector->ddc_bus)
-		radeon_i2c_destroy(radeon_connector->ddc_bus);
 	if (radeon_connector->edid)
 		kfree(radeon_connector->edid);
 	if (radeon_dig_connector->dp_i2c_bus)
@@ -1088,7 +1084,7 @@ radeon_add_atom_connector(struct drm_device *dev,
 		drm_connector_init(dev, &radeon_connector->base, &radeon_vga_connector_funcs, connector_type);
 		drm_connector_helper_add(&radeon_connector->base, &radeon_vga_connector_helper_funcs);
 		if (i2c_bus->valid) {
-			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "VGA");
+			radeon_connector->ddc_bus = radeon_i2c_lookup(rdev, i2c_bus);
 			if (!radeon_connector->ddc_bus)
 				goto failed;
 		}
@@ -1104,7 +1100,7 @@ radeon_add_atom_connector(struct drm_device *dev,
 		drm_connector_init(dev, &radeon_connector->base, &radeon_vga_connector_funcs, connector_type);
 		drm_connector_helper_add(&radeon_connector->base, &radeon_vga_connector_helper_funcs);
 		if (i2c_bus->valid) {
-			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "DVI");
+			radeon_connector->ddc_bus = radeon_i2c_lookup(rdev, i2c_bus);
 			if (!radeon_connector->ddc_bus)
 				goto failed;
 		}
@@ -1126,7 +1122,7 @@ radeon_add_atom_connector(struct drm_device *dev,
 		drm_connector_init(dev, &radeon_connector->base, &radeon_dvi_connector_funcs, connector_type);
 		drm_connector_helper_add(&radeon_connector->base, &radeon_dvi_connector_helper_funcs);
 		if (i2c_bus->valid) {
-			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "DVI");
+			radeon_connector->ddc_bus = radeon_i2c_lookup(rdev, i2c_bus);
 			if (!radeon_connector->ddc_bus)
 				goto failed;
 		}
@@ -1156,7 +1152,7 @@ radeon_add_atom_connector(struct drm_device *dev,
 		drm_connector_init(dev, &radeon_connector->base, &radeon_dvi_connector_funcs, connector_type);
 		drm_connector_helper_add(&radeon_connector->base, &radeon_dvi_connector_helper_funcs);
 		if (i2c_bus->valid) {
-			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "HDMI");
+			radeon_connector->ddc_bus = radeon_i2c_lookup(rdev, i2c_bus);
 			if (!radeon_connector->ddc_bus)
 				goto failed;
 		}
@@ -1187,10 +1183,7 @@ radeon_add_atom_connector(struct drm_device *dev,
 				radeon_dig_connector->dp_i2c_bus = radeon_i2c_create_dp(dev, i2c_bus, "DP-auxch");
 			if (!radeon_dig_connector->dp_i2c_bus)
 				goto failed;
-			if (connector_type == DRM_MODE_CONNECTOR_eDP)
-				radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "eDP");
-			else
-				radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "DP");
+			radeon_connector->ddc_bus = radeon_i2c_lookup(rdev, i2c_bus);
 			if (!radeon_connector->ddc_bus)
 				goto failed;
 		}
@@ -1230,7 +1223,7 @@ radeon_add_atom_connector(struct drm_device *dev,
 		drm_connector_init(dev, &radeon_connector->base, &radeon_lvds_connector_funcs, connector_type);
 		drm_connector_helper_add(&radeon_connector->base, &radeon_lvds_connector_helper_funcs);
 		if (i2c_bus->valid) {
-			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "LVDS");
+			radeon_connector->ddc_bus = radeon_i2c_lookup(rdev, i2c_bus);
 			if (!radeon_connector->ddc_bus)
 				goto failed;
 		}
@@ -1252,8 +1245,6 @@ radeon_add_atom_connector(struct drm_device *dev,
 	return;
 
 failed:
-	if (radeon_connector->ddc_bus)
-		radeon_i2c_destroy(radeon_connector->ddc_bus);
 	drm_connector_cleanup(connector);
 	kfree(connector);
 }
@@ -1300,7 +1291,7 @@ radeon_add_legacy_connector(struct drm_device *dev,
 		drm_connector_init(dev, &radeon_connector->base, &radeon_vga_connector_funcs, connector_type);
 		drm_connector_helper_add(&radeon_connector->base, &radeon_vga_connector_helper_funcs);
 		if (i2c_bus->valid) {
-			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "VGA");
+			radeon_connector->ddc_bus = radeon_i2c_lookup(rdev, i2c_bus);
 			if (!radeon_connector->ddc_bus)
 				goto failed;
 		}
@@ -1316,7 +1307,7 @@ radeon_add_legacy_connector(struct drm_device *dev,
 		drm_connector_init(dev, &radeon_connector->base, &radeon_vga_connector_funcs, connector_type);
 		drm_connector_helper_add(&radeon_connector->base, &radeon_vga_connector_helper_funcs);
 		if (i2c_bus->valid) {
-			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "DVI");
+			radeon_connector->ddc_bus = radeon_i2c_lookup(rdev, i2c_bus);
 			if (!radeon_connector->ddc_bus)
 				goto failed;
 		}
@@ -1332,7 +1323,7 @@ radeon_add_legacy_connector(struct drm_device *dev,
 		drm_connector_init(dev, &radeon_connector->base, &radeon_dvi_connector_funcs, connector_type);
 		drm_connector_helper_add(&radeon_connector->base, &radeon_dvi_connector_helper_funcs);
 		if (i2c_bus->valid) {
-			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "DVI");
+			radeon_connector->ddc_bus = radeon_i2c_lookup(rdev, i2c_bus);
 			if (!radeon_connector->ddc_bus)
 				goto failed;
 		}
@@ -1372,7 +1363,7 @@ radeon_add_legacy_connector(struct drm_device *dev,
 		drm_connector_init(dev, &radeon_connector->base, &radeon_lvds_connector_funcs, connector_type);
 		drm_connector_helper_add(&radeon_connector->base, &radeon_lvds_connector_helper_funcs);
 		if (i2c_bus->valid) {
-			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "LVDS");
+			radeon_connector->ddc_bus = radeon_i2c_lookup(rdev, i2c_bus);
 			if (!radeon_connector->ddc_bus)
 				goto failed;
 		}
@@ -1393,8 +1384,6 @@ radeon_add_legacy_connector(struct drm_device *dev,
 	return;
 
 failed:
-	if (radeon_connector->ddc_bus)
-		radeon_i2c_destroy(radeon_connector->ddc_bus);
 	drm_connector_cleanup(connector);
 	kfree(connector);
 }