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>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 02d4e2a..5bbc086 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -400,6 +400,16 @@ struct radeon_hpd {
 	struct radeon_gpio_rec gpio;
 };
 
+struct radeon_router {
+	bool valid;
+	u32 router_id;
+	struct radeon_i2c_bus_rec i2c_info;
+	u8 i2c_addr;
+	u8 mux_type;
+	u8 mux_control_pin;
+	u8 mux_state;
+};
+
 struct radeon_connector {
 	struct drm_connector base;
 	uint32_t connector_id;
@@ -415,6 +425,8 @@ struct radeon_connector {
 	bool dac_load_detect;
 	uint16_t connector_object_id;
 	struct radeon_hpd hpd;
+	struct radeon_router router;
+	struct radeon_i2c_chan *router_bus;
 };
 
 struct radeon_framebuffer {
@@ -471,6 +483,7 @@ extern void radeon_i2c_put_byte(struct radeon_i2c_chan *i2c,
 				u8 slave_addr,
 				u8 addr,
 				u8 val);
+extern void radeon_router_select_port(struct radeon_connector *radeon_connector);
 extern bool radeon_ddc_probe(struct radeon_connector *radeon_connector);
 extern int radeon_ddc_get_modes(struct radeon_connector *radeon_connector);