drm/radeon/kms: add support for external tmds on legacy boards

This enables initialization of external tmds chips on pre-atom
and mac systems.  Macs are untested.  Also, some macs have single
link tmds chips while others have dual link tmds chips.  We need
to figure out which ones have which.

This gets external TMDS working on my RS485 and RV380.

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

1 files changed, 32 insertions, 6 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 20847a2fc4d..27ddc9b9a9e 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -184,6 +184,11 @@ enum radeon_connector_table {
 	CT_EMAC,
 };
 
+enum radeon_dvo_chip {
+	DVO_SIL164,
+	DVO_SIL1178,
+};
+
 struct radeon_mode_info {
 	struct atom_context *atom_context;
 	struct card_info *atom_card_info;
@@ -275,6 +280,13 @@ struct radeon_encoder_int_tmds {
 	struct radeon_tmds_pll tmds_pll[4];
 };
 
+struct radeon_encoder_ext_tmds {
+	/* tmds over dvo */
+	struct radeon_i2c_chan *i2c_bus;
+	uint8_t slave_addr;
+	enum radeon_dvo_chip dvo_chip;
+};
+
 /* spread spectrum */
 struct radeon_atom_ss {
 	uint16_t percentage;
@@ -343,6 +355,14 @@ extern struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
 						 struct radeon_i2c_bus_rec *rec,
 						 const char *name);
 extern void radeon_i2c_destroy(struct radeon_i2c_chan *i2c);
+extern void radeon_i2c_sw_get_byte(struct radeon_i2c_chan *i2c_bus,
+				   u8 slave_addr,
+				   u8 addr,
+				   u8 *val);
+extern void radeon_i2c_sw_put_byte(struct radeon_i2c_chan *i2c,
+				   u8 slave_addr,
+				   u8 addr,
+				   u8 val);
 extern bool radeon_ddc_probe(struct radeon_connector *radeon_connector);
 extern int radeon_ddc_get_modes(struct radeon_connector *radeon_connector);
 
@@ -392,12 +412,16 @@ extern bool radeon_atom_get_clock_info(struct drm_device *dev);
 extern bool radeon_combios_get_clock_info(struct drm_device *dev);
 extern struct radeon_encoder_atom_dig *
 radeon_atombios_get_lvds_info(struct radeon_encoder *encoder);
-bool radeon_atombios_get_tmds_info(struct radeon_encoder *encoder,
-				   struct radeon_encoder_int_tmds *tmds);
-bool radeon_legacy_get_tmds_info_from_combios(struct radeon_encoder *encoder,
-					   struct radeon_encoder_int_tmds *tmds);
-bool radeon_legacy_get_tmds_info_from_table(struct radeon_encoder *encoder,
-					    struct radeon_encoder_int_tmds *tmds);
+extern bool radeon_atombios_get_tmds_info(struct radeon_encoder *encoder,
+					  struct radeon_encoder_int_tmds *tmds);
+extern bool radeon_legacy_get_tmds_info_from_combios(struct radeon_encoder *encoder,
+						     struct radeon_encoder_int_tmds *tmds);
+extern bool radeon_legacy_get_tmds_info_from_table(struct radeon_encoder *encoder,
+						   struct radeon_encoder_int_tmds *tmds);
+extern bool radeon_legacy_get_ext_tmds_info_from_combios(struct radeon_encoder *encoder,
+							 struct radeon_encoder_ext_tmds *tmds);
+extern bool radeon_legacy_get_ext_tmds_info_from_table(struct radeon_encoder *encoder,
+						       struct radeon_encoder_ext_tmds *tmds);
 extern struct radeon_encoder_primary_dac *
 radeon_atombios_get_primary_dac_info(struct radeon_encoder *encoder);
 extern struct radeon_encoder_tv_dac *
@@ -409,6 +433,8 @@ extern struct radeon_encoder_tv_dac *
 radeon_combios_get_tv_dac_info(struct radeon_encoder *encoder);
 extern struct radeon_encoder_primary_dac *
 radeon_combios_get_primary_dac_info(struct radeon_encoder *encoder);
+extern bool radeon_combios_external_tmds_setup(struct drm_encoder *encoder);
+extern void radeon_external_tmds_setup(struct drm_encoder *encoder);
 extern void radeon_combios_output_lock(struct drm_encoder *encoder, bool lock);
 extern void radeon_combios_initialize_bios_scratch_regs(struct drm_device *dev);
 extern void radeon_atom_output_lock(struct drm_encoder *encoder, bool lock);