static void radeon_dp_set_tp(struct radeon_dp_link_train_info *dp_info, int tp)
{
int rtp = 0;
/* set training pattern on the source */
if (ASIC_IS_DCE4(dp_info->rdev) || !dp_info->use_dpencoder) {
switch (tp) {
case DP_TRAINING_PATTERN_1:
rtp = ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN1;
break;
case DP_TRAINING_PATTERN_2:
rtp = ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN2;
break;
case DP_TRAINING_PATTERN_3:
rtp = ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN3;
break;
}
atombios_dig_encoder_setup(dp_info->encoder, rtp, 0);
} else {
switch (tp) {
case DP_TRAINING_PATTERN_1:
rtp = 0;
break;
case DP_TRAINING_PATTERN_2:
rtp = 1;
break;
}
radeon_dp_encoder_service(dp_info->rdev, ATOM_DP_ACTION_TRAINING_PATTERN_SEL,
dp_info->dp_clock, dp_info->enc_id, rtp);
}
/* enable training pattern on the sink */
radeon_write_dpcd_reg(dp_info->radeon_connector, DP_TRAINING_PATTERN_SET, tp);
}
static void radeon_dp_set_panel_mode(struct drm_encoder *encoder,
struct drm_connector *connector)
{
struct drm_device *dev = encoder->dev;
struct radeon_device *rdev = dev->dev_private;
struct radeon_connector *radeon_connector = to_radeon_connector(connector);
int panel_mode = DP_PANEL_MODE_EXTERNAL_DP_MODE;
if (!ASIC_IS_DCE4(rdev))
return;
if (radeon_connector_encoder_get_dp_bridge_encoder_id(connector) ==
ENCODER_OBJECT_ID_NUTMEG)
panel_mode = DP_PANEL_MODE_INTERNAL_DP1_MODE;
else if (radeon_connector_encoder_get_dp_bridge_encoder_id(connector) ==
ENCODER_OBJECT_ID_TRAVIS)
panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
u8 tmp = radeon_read_dpcd_reg(radeon_connector, DP_EDP_CONFIGURATION_CAP);
if (tmp & 1)
panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
}
atombios_dig_encoder_setup(encoder,
ATOM_ENCODER_CMD_SETUP_PANEL_MODE,
panel_mode);
if ((connector->connector_type == DRM_MODE_CONNECTOR_eDP) &&
(panel_mode == DP_PANEL_MODE_INTERNAL_DP2_MODE)) {
radeon_write_dpcd_reg(radeon_connector, DP_EDP_CONFIGURATION_SET, 1);
}
}
static int radeon_dp_link_train_init(struct radeon_dp_link_train_info *dp_info)
{
struct radeon_encoder *radeon_encoder = to_radeon_encoder(dp_info->encoder);
struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
u8 tmp;
/* power up the sink */
if (dp_info->dpcd[0] >= 0x11) {
radeon_write_dpcd_reg(dp_info->radeon_connector,
DP_SET_POWER, DP_SET_POWER_D0);
usleep_range(1000, 2000);
}
/* possibly enable downspread on the sink */
if (dp_info->dpcd[3] & 0x1)
radeon_write_dpcd_reg(dp_info->radeon_connector,
DP_DOWNSPREAD_CTRL, DP_SPREAD_AMP_0_5);
else
radeon_write_dpcd_reg(dp_info->radeon_connector,
DP_DOWNSPREAD_CTRL, 0);
if ((dp_info->connector->connector_type == DRM_MODE_CONNECTOR_eDP) &&
(dig->panel_mode == DP_PANEL_MODE_INTERNAL_DP2_MODE)) {
radeon_write_dpcd_reg(dp_info->radeon_connector, DP_EDP_CONFIGURATION_SET, 1);
}
/* set the lane count on the sink */
tmp = dp_info->dp_lane_count;
if (drm_dp_enhanced_frame_cap(dp_info->dpcd))
tmp |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
radeon_write_dpcd_reg(dp_info->radeon_connector, DP_LANE_COUNT_SET, tmp);
/* set the link rate on the sink */
tmp = drm_dp_link_rate_to_bw_code(dp_info->dp_clock);
radeon_write_dpcd_reg(dp_info->radeon_connector, DP_LINK_BW_SET, tmp);
/* start training on the source */
if (ASIC_IS_DCE4(dp_info->rdev) || !dp_info->use_dpencoder)
atombios_dig_encoder_setup(dp_info->encoder,
ATOM_ENCODER_CMD_DP_LINK_TRAINING_START, 0);
else
radeon_dp_encoder_service(dp_info->rdev, ATOM_DP_ACTION_TRAINING_START,
dp_info->dp_clock, dp_info->enc_id, 0);
/* disable the training pattern on the sink */
radeon_write_dpcd_reg(dp_info->radeon_connector,
DP_TRAINING_PATTERN_SET,
DP_TRAINING_PATTERN_DISABLE);
return 0;
}
static void radeon_dp_set_panel_mode(struct drm_encoder *encoder,
struct drm_connector *connector)
{
struct drm_device *dev = encoder->dev;
struct radeon_device *rdev = dev->dev_private;
int panel_mode = DP_PANEL_MODE_EXTERNAL_DP_MODE;
if (!ASIC_IS_DCE4(rdev))
return;
if (radeon_connector_encoder_is_dp_bridge(connector))
panel_mode = DP_PANEL_MODE_INTERNAL_DP1_MODE;
atombios_dig_encoder_setup(encoder,
ATOM_ENCODER_CMD_SETUP_PANEL_MODE,
panel_mode);
}
static int radeon_dp_link_train_init(struct radeon_dp_link_train_info *dp_info)
{
u8 tmp;
/* power up the sink */
if (dp_info->dpcd[0] >= 0x11)
radeon_write_dpcd_reg(dp_info->radeon_connector,
DP_SET_POWER, DP_SET_POWER_D0);
/* possibly enable downspread on the sink */
if (dp_info->dpcd[3] & 0x1)
radeon_write_dpcd_reg(dp_info->radeon_connector,
DP_DOWNSPREAD_CTRL, DP_SPREAD_AMP_0_5);
else
radeon_write_dpcd_reg(dp_info->radeon_connector,
DP_DOWNSPREAD_CTRL, 0);
radeon_dp_set_panel_mode(dp_info->encoder, dp_info->connector);
/* set the lane count on the sink */
tmp = dp_info->dp_lane_count;
if (dp_info->dpcd[0] >= 0x11)
tmp |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
radeon_write_dpcd_reg(dp_info->radeon_connector, DP_LANE_COUNT_SET, tmp);
/* set the link rate on the sink */
tmp = dp_get_dp_link_rate_coded(dp_info->dp_clock);
radeon_write_dpcd_reg(dp_info->radeon_connector, DP_LINK_BW_SET, tmp);
/* start training on the source */
if (ASIC_IS_DCE4(dp_info->rdev) || !dp_info->use_dpencoder)
atombios_dig_encoder_setup(dp_info->encoder,
ATOM_ENCODER_CMD_DP_LINK_TRAINING_START, 0);
else
radeon_dp_encoder_service(dp_info->rdev, ATOM_DP_ACTION_TRAINING_START,
dp_info->dp_clock, dp_info->enc_id, 0);
/* disable the training pattern on the sink */
radeon_write_dpcd_reg(dp_info->radeon_connector,
DP_TRAINING_PATTERN_SET,
DP_TRAINING_PATTERN_DISABLE);
return 0;
}
static int radeon_dp_link_train_finish(struct radeon_dp_link_train_info *dp_info)
{
DRM_UDELAY(400);
/* disable the training pattern on the sink */
radeon_write_dpcd_reg(dp_info->radeon_connector,
DP_TRAINING_PATTERN_SET,
DP_TRAINING_PATTERN_DISABLE);
/* disable the training pattern on the source */
if (ASIC_IS_DCE4(dp_info->rdev) || !dp_info->use_dpencoder)
atombios_dig_encoder_setup(dp_info->encoder,
ATOM_ENCODER_CMD_DP_LINK_TRAINING_COMPLETE, 0);
else
radeon_dp_encoder_service(dp_info->rdev, ATOM_DP_ACTION_TRAINING_COMPLETE,
dp_info->dp_clock, dp_info->enc_id, 0);
return 0;
}
void dp_link_train(struct drm_encoder *encoder,
struct drm_connector *connector)
{
struct drm_device *dev = encoder->dev;
struct radeon_device *rdev = dev->dev_private;
struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
struct radeon_encoder_atom_dig *dig;
struct radeon_connector *radeon_connector;
struct radeon_connector_atom_dig *dig_connector;
int enc_id = 0;
bool clock_recovery, channel_eq;
u8 link_status[DP_LINK_STATUS_SIZE];
u8 link_configuration[DP_LINK_CONFIGURATION_SIZE];
u8 tries, voltage;
u8 train_set[4];
int i;
if ((connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort) &&
(connector->connector_type != DRM_MODE_CONNECTOR_eDP))
return;
if (!radeon_encoder->enc_priv)
return;
dig = radeon_encoder->enc_priv;
radeon_connector = to_radeon_connector(connector);
if (!radeon_connector->con_priv)
return;
dig_connector = radeon_connector->con_priv;
if (dig->dig_encoder)
enc_id |= ATOM_DP_CONFIG_DIG2_ENCODER;
else
enc_id |= ATOM_DP_CONFIG_DIG1_ENCODER;
if (dig_connector->linkb)
enc_id |= ATOM_DP_CONFIG_LINK_B;
else
enc_id |= ATOM_DP_CONFIG_LINK_A;
memset(link_configuration, 0, DP_LINK_CONFIGURATION_SIZE);
if (dig_connector->dp_clock == 270000)
link_configuration[0] = DP_LINK_BW_2_7;
else
link_configuration[0] = DP_LINK_BW_1_62;
link_configuration[1] = dig_connector->dp_lane_count;
if (dig_connector->dpcd[0] >= 0x11)
link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
/* power up the sink */
dp_set_power(radeon_connector, DP_SET_POWER_D0);
/* disable the training pattern on the sink */
dp_set_training(radeon_connector, DP_TRAINING_PATTERN_DISABLE);
/* set link bw and lanes on the sink */
dp_set_link_bw_lanes(radeon_connector, link_configuration);
/* disable downspread on the sink */
dp_set_downspread(radeon_connector, 0);
if (ASIC_IS_DCE4(rdev)) {
/* start training on the source */
atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_LINK_TRAINING_START);
/* set training pattern 1 on the source */
atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN1);
} else {
/* start training on the source */
radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_START,
dig_connector->dp_clock, enc_id, 0);
/* set training pattern 1 on the source */
radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_PATTERN_SEL,
dig_connector->dp_clock, enc_id, 0);
}
/* set initial vs/emph */
memset(train_set, 0, 4);
udelay(400);
/* set training pattern 1 on the sink */
dp_set_training(radeon_connector, DP_TRAINING_PATTERN_1);
dp_update_dpvs_emph(radeon_connector, encoder, train_set);
/* clock recovery loop */
clock_recovery = false;
tries = 0;
voltage = 0xff;
for (;;) {
udelay(100);
if (!atom_dp_get_link_status(radeon_connector, link_status))
break;
if (dp_clock_recovery_ok(link_status, dig_connector->dp_lane_count)) {
clock_recovery = true;
break;
}
for (i = 0; i < dig_connector->dp_lane_count; i++) {
if ((train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0)
break;
}
if (i == dig_connector->dp_lane_count) {
DRM_ERROR("clock recovery reached max voltage\n");
break;
}
if ((train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) {
++tries;
if (tries == 5) {
DRM_ERROR("clock recovery tried 5 times\n");
break;
}
} else
tries = 0;
voltage = train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
/* Compute new train_set as requested by sink */
dp_get_adjust_train(link_status, dig_connector->dp_lane_count, train_set);
dp_update_dpvs_emph(radeon_connector, encoder, train_set);
}
if (!clock_recovery)
DRM_ERROR("clock recovery failed\n");
else
DRM_DEBUG("clock recovery at voltage %d pre-emphasis %d\n",
train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK,
(train_set[0] & DP_TRAIN_PRE_EMPHASIS_MASK) >>
DP_TRAIN_PRE_EMPHASIS_SHIFT);
/* set training pattern 2 on the sink */
dp_set_training(radeon_connector, DP_TRAINING_PATTERN_2);
/* set training pattern 2 on the source */
if (ASIC_IS_DCE4(rdev))
atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN2);
else
radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_PATTERN_SEL,
dig_connector->dp_clock, enc_id, 1);
/* channel equalization loop */
tries = 0;
channel_eq = false;
for (;;) {
udelay(400);
if (!atom_dp_get_link_status(radeon_connector, link_status))
break;
if (dp_channel_eq_ok(link_status, dig_connector->dp_lane_count)) {
channel_eq = true;
break;
}
/* Try 5 times */
if (tries > 5) {
DRM_ERROR("channel eq failed: 5 tries\n");
break;
}
/* Compute new train_set as requested by sink */
dp_get_adjust_train(link_status, dig_connector->dp_lane_count, train_set);
dp_update_dpvs_emph(radeon_connector, encoder, train_set);
tries++;
}
if (!channel_eq)
DRM_ERROR("channel eq failed\n");
else
DRM_DEBUG("channel eq at voltage %d pre-emphasis %d\n",
train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK,
(train_set[0] & DP_TRAIN_PRE_EMPHASIS_MASK)
>> DP_TRAIN_PRE_EMPHASIS_SHIFT);
/* disable the training pattern on the sink */
dp_set_training(radeon_connector, DP_TRAINING_PATTERN_DISABLE);
/* disable the training pattern on the source */
if (ASIC_IS_DCE4(rdev))
atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_LINK_TRAINING_COMPLETE);
else
radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_COMPLETE,
dig_connector->dp_clock, enc_id, 0);
}