Need to set up the bridge for DDC prior to the i2c over aux transaction.
Signed-off-by: Alex Deucher alexdeucher@gmail.com --- drivers/gpu/drm/radeon/radeon_connectors.c | 20 ++++++++++++++++---- drivers/gpu/drm/radeon/radeon_encoders.c | 12 ++++++++++++ drivers/gpu/drm/radeon/radeon_mode.h | 1 + 3 files changed, 29 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c index 05b9c35..4d45855 100644 --- a/drivers/gpu/drm/radeon/radeon_connectors.c +++ b/drivers/gpu/drm/radeon/radeon_connectors.c @@ -44,6 +44,8 @@ extern void radeon_legacy_backlight_init(struct radeon_encoder *radeon_encoder, struct drm_connector *drm_connector);
+bool radeon_connector_encoder_is_dp_bridge(struct drm_connector *connector); + void radeon_connector_hotplug(struct drm_connector *connector) { struct drm_device *dev = connector->dev; @@ -1063,10 +1065,10 @@ static int radeon_dp_get_modes(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; + struct drm_encoder *encoder = radeon_best_single_encoder(connector); int ret;
if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) { - struct drm_encoder *encoder; struct drm_display_mode *mode;
if (!radeon_dig_connector->edp_on) @@ -1078,7 +1080,6 @@ static int radeon_dp_get_modes(struct drm_connector *connector) ATOM_TRANSMITTER_ACTION_POWER_OFF);
if (ret > 0) { - encoder = radeon_best_single_encoder(connector); if (encoder) { radeon_fixup_lvds_native_mode(encoder, connector); /* add scaled modes */ @@ -1102,8 +1103,14 @@ static int radeon_dp_get_modes(struct drm_connector *connector) /* add scaled modes */ radeon_add_common_modes(encoder, connector); } - } else + } else { + /* need to setup ddc on the bridge */ + if (radeon_connector_encoder_is_dp_bridge(connector)) { + if (encoder) + radeon_atom_ext_encoder_setup_ddc(encoder); + } ret = radeon_ddc_get_modes(radeon_connector); + }
return ret; } @@ -1187,6 +1194,7 @@ radeon_dp_detect(struct drm_connector *connector, bool force) struct radeon_connector *radeon_connector = to_radeon_connector(connector); enum drm_connector_status ret = connector_status_disconnected; struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv; + struct drm_encoder *encoder = radeon_best_single_encoder(connector);
if (radeon_connector->edid) { kfree(radeon_connector->edid); @@ -1194,7 +1202,6 @@ radeon_dp_detect(struct drm_connector *connector, bool force) }
if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) { - struct drm_encoder *encoder = radeon_best_single_encoder(connector); if (encoder) { struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder); struct drm_display_mode *native_mode = &radeon_encoder->native_mode; @@ -1214,6 +1221,11 @@ radeon_dp_detect(struct drm_connector *connector, bool force) atombios_set_edp_panel_power(connector, ATOM_TRANSMITTER_ACTION_POWER_OFF); } else { + /* need to setup ddc on the bridge */ + if (radeon_connector_encoder_is_dp_bridge(connector)) { + if (encoder) + radeon_atom_ext_encoder_setup_ddc(encoder); + } radeon_dig_connector->dp_sink_type = radeon_dp_getsinktype(radeon_connector); if (radeon_hpd_sense(rdev, radeon_connector->hpd.hpd)) { ret = connector_status_connected; diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c index d344944..8e058f1 100644 --- a/drivers/gpu/drm/radeon/radeon_encoders.c +++ b/drivers/gpu/drm/radeon/radeon_encoders.c @@ -2046,6 +2046,18 @@ radeon_atom_dig_detect(struct drm_encoder *encoder, struct drm_connector *connec return connector_status_disconnected; }
+void +radeon_atom_ext_encoder_setup_ddc(struct drm_encoder *encoder) +{ + struct drm_encoder *ext_encoder = radeon_atom_get_external_encoder(encoder); + + if (ext_encoder) + /* ddc_setup on the dp bridge */ + atombios_external_encoder_setup(encoder, ext_encoder, + EXTERNAL_ENCODER_ACTION_V3_DDC_SETUP); + +} + static void radeon_atom_encoder_prepare(struct drm_encoder *encoder) { struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder); diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h index 977a341..f734b37 100644 --- a/drivers/gpu/drm/radeon/radeon_mode.h +++ b/drivers/gpu/drm/radeon/radeon_mode.h @@ -483,6 +483,7 @@ extern void radeon_atom_encoder_init(struct radeon_device *rdev); extern void atombios_dig_transmitter_setup(struct drm_encoder *encoder, int action, uint8_t lane_num, uint8_t lane_set); +extern void radeon_atom_ext_encoder_setup_ddc(struct drm_encoder *encoder); extern int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode, u8 write_byte, u8 *read_byte);