drm/radeon/kms: add support for router objects
router objects are found on systems that use a mux to control
ddc line to connector routing or to control the actual clock and data
routing from the chip to the connectors. This patch implements ddc line
routing.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 52ac08e..d49a148 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -319,6 +319,10 @@
radeon_connector->ddc_bus->rec.en_data_reg,
radeon_connector->ddc_bus->rec.y_clk_reg,
radeon_connector->ddc_bus->rec.y_data_reg);
+ if (radeon_connector->router_bus)
+ DRM_INFO(" DDC Router 0x%x/0x%x\n",
+ radeon_connector->router.mux_control_pin,
+ radeon_connector->router.mux_state);
} else {
if (connector->connector_type == DRM_MODE_CONNECTOR_VGA ||
connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
@@ -395,6 +399,10 @@
struct radeon_device *rdev = dev->dev_private;
int ret = 0;
+ /* on hw with routers, select right port */
+ if (radeon_connector->router.valid)
+ radeon_router_select_port(radeon_connector);
+
if ((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) ||
(radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP)) {
struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;
@@ -425,6 +433,10 @@
struct radeon_connector *radeon_connector = to_radeon_connector(connector);
int ret = 0;
+ /* on hw with routers, select right port */
+ if (radeon_connector->router.valid)
+ radeon_router_select_port(radeon_connector);
+
if (!radeon_connector->ddc_bus)
return -1;
edid = drm_get_edid(connector, &radeon_connector->ddc_bus->adapter);