[PATCH v3 21/22] drm/amdgpu: Provide ddc symlink in connector sysfs directory

[Andrzej Pietrasiewicz]

Use the ddc pointer provided by the generic connector.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p at collabora.com>
---
 .../gpu/drm/amd/amdgpu/amdgpu_connectors.c    | 70 ++++++++++++++-----
 1 file changed, 51 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
index 73b2ede773d3..5f8a7e3818b9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
@@ -1573,11 +1573,15 @@ amdgpu_connector_add(struct amdgpu_device *adev,
 			goto failed;
 		amdgpu_connector->con_priv = amdgpu_dig_connector;
 		if (i2c_bus->valid) {
-			amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
-			if (amdgpu_connector->ddc_bus)
+			struct amdgpu_connector *acn = amdgpu_connector;
+
+			acn->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
+			if (acn->ddc_bus) {
 				has_aux = true;
-			else
+				connector->ddc = &acn->ddc_bus->adapter;
+			} else {
 				DRM_ERROR("DP: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
+			}
 		}
 		switch (connector_type) {
 		case DRM_MODE_CONNECTOR_VGA:
@@ -1662,9 +1666,13 @@ amdgpu_connector_add(struct amdgpu_device *adev,
 			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_vga_funcs, connector_type);
 			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_vga_helper_funcs);
 			if (i2c_bus->valid) {
-				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
-				if (!amdgpu_connector->ddc_bus)
+				struct amdgpu_connector *acn = amdgpu_connector;
+
+				acn->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
+				if (!acn->ddc_bus)
 					DRM_ERROR("VGA: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
+				else
+					connector->ddc = &acn->ddc_bus->adapter;
 			}
 			amdgpu_connector->dac_load_detect = true;
 			drm_object_attach_property(&amdgpu_connector->base.base,
@@ -1682,9 +1690,13 @@ amdgpu_connector_add(struct amdgpu_device *adev,
 			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_vga_funcs, connector_type);
 			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_vga_helper_funcs);
 			if (i2c_bus->valid) {
-				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
-				if (!amdgpu_connector->ddc_bus)
+				struct amdgpu_connector *acn = amdgpu_connector;
+
+				acn->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
+				if (!acn->ddc_bus)
 					DRM_ERROR("DVIA: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
+				else
+					connector->ddc = &acn->ddc_bus->adapter;
 			}
 			amdgpu_connector->dac_load_detect = true;
 			drm_object_attach_property(&amdgpu_connector->base.base,
@@ -1707,9 +1719,13 @@ amdgpu_connector_add(struct amdgpu_device *adev,
 			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_dvi_funcs, connector_type);
 			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_dvi_helper_funcs);
 			if (i2c_bus->valid) {
-				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
-				if (!amdgpu_connector->ddc_bus)
+				struct amdgpu_connector *acn = amdgpu_connector;
+
+				acn->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
+				if (!acn->ddc_bus)
 					DRM_ERROR("DVI: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
+				else
+					connector->ddc = &acn->ddc_bus->adapter;
 			}
 			subpixel_order = SubPixelHorizontalRGB;
 			drm_object_attach_property(&amdgpu_connector->base.base,
@@ -1757,9 +1773,13 @@ amdgpu_connector_add(struct amdgpu_device *adev,
 			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_dvi_funcs, connector_type);
 			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_dvi_helper_funcs);
 			if (i2c_bus->valid) {
-				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
-				if (!amdgpu_connector->ddc_bus)
+				struct amdgpu_connector *acn = amdgpu_connector;
+
+				acn->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
+				if (!acn->ddc_bus)
 					DRM_ERROR("HDMI: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
+				else
+					connector->ddc = &acn->ddc_bus->adapter;
 			}
 			drm_object_attach_property(&amdgpu_connector->base.base,
 						      adev->mode_info.coherent_mode_property,
@@ -1799,11 +1819,15 @@ amdgpu_connector_add(struct amdgpu_device *adev,
 			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_dp_funcs, connector_type);
 			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_dp_helper_funcs);
 			if (i2c_bus->valid) {
-				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
-				if (amdgpu_connector->ddc_bus)
+				struct amdgpu_connector *acn = amdgpu_connector;
+
+				acn->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
+				if (acn->ddc_bus) {
 					has_aux = true;
-				else
+					connector->ddc = &acn->ddc_bus->adapter;
+				} else {
 					DRM_ERROR("DP: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
+				}
 			}
 			subpixel_order = SubPixelHorizontalRGB;
 			drm_object_attach_property(&amdgpu_connector->base.base,
@@ -1841,11 +1865,15 @@ amdgpu_connector_add(struct amdgpu_device *adev,
 			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_edp_funcs, connector_type);
 			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_dp_helper_funcs);
 			if (i2c_bus->valid) {
-				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
-				if (amdgpu_connector->ddc_bus)
+				struct amdgpu_connector *acn = amdgpu_connector;
+
+				acn->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
+				if (acn->ddc_bus) {
 					has_aux = true;
-				else
+					connector->ddc = &acn->ddc_bus->adapter;
+				} else {
 					DRM_ERROR("DP: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
+				}
 			}
 			drm_object_attach_property(&amdgpu_connector->base.base,
 						      dev->mode_config.scaling_mode_property,
@@ -1862,9 +1890,13 @@ amdgpu_connector_add(struct amdgpu_device *adev,
 			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_lvds_funcs, connector_type);
 			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_lvds_helper_funcs);
 			if (i2c_bus->valid) {
-				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
-				if (!amdgpu_connector->ddc_bus)
+				struct amdgpu_connector *acn = amdgpu_connector;
+
+				acn->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
+				if (!acn->ddc_bus)
 					DRM_ERROR("LVDS: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
+				else
+					connector->ddc = &acn->ddc_bus->adapter;
 			}
 			drm_object_attach_property(&amdgpu_connector->base.base,
 						      dev->mode_config.scaling_mode_property,
-- 
2.17.1