diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/atombios_dp.c')
-rw-r--r-- | drivers/gpu/drm/radeon/atombios_dp.c | 369 |
1 files changed, 141 insertions, 228 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index 4ad7643fce5f..54e4f52549af 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -142,186 +142,81 @@ static int radeon_process_aux_ch(struct radeon_i2c_chan *chan, return recv_bytes; } -static int radeon_dp_aux_native_write(struct radeon_connector *radeon_connector, - u16 address, u8 *send, u8 send_bytes, u8 delay) -{ - struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; - int ret; - u8 msg[20]; - int msg_bytes = send_bytes + 4; - u8 ack; - unsigned retry; - - if (send_bytes > 16) - return -1; - - msg[0] = address; - msg[1] = address >> 8; - msg[2] = DP_AUX_NATIVE_WRITE << 4; - msg[3] = (msg_bytes << 4) | (send_bytes - 1); - memcpy(&msg[4], send, send_bytes); - - for (retry = 0; retry < 7; retry++) { - ret = radeon_process_aux_ch(dig_connector->dp_i2c_bus, - msg, msg_bytes, NULL, 0, delay, &ack); - if (ret == -EBUSY) - continue; - else if (ret < 0) - return ret; - ack >>= 4; - if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_ACK) - return send_bytes; - else if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_DEFER) - usleep_range(400, 500); - else - return -EIO; - } - - return -EIO; -} +#define BARE_ADDRESS_SIZE 3 +#define HEADER_SIZE (BARE_ADDRESS_SIZE + 1) -static int radeon_dp_aux_native_read(struct radeon_connector *radeon_connector, - u16 address, u8 *recv, int recv_bytes, u8 delay) +static ssize_t +radeon_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) { - struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; - u8 msg[4]; - int msg_bytes = 4; - u8 ack; + struct radeon_i2c_chan *chan = + container_of(aux, struct radeon_i2c_chan, aux); int ret; - unsigned retry; - - msg[0] = address; - msg[1] = address >> 8; - msg[2] = DP_AUX_NATIVE_READ << 4; - msg[3] = (msg_bytes << 4) | (recv_bytes - 1); - - for (retry = 0; retry < 7; retry++) { - ret = radeon_process_aux_ch(dig_connector->dp_i2c_bus, - msg, msg_bytes, recv, recv_bytes, delay, &ack); - if (ret == -EBUSY) - continue; - else if (ret < 0) - return ret; - ack >>= 4; - if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_ACK) - return ret; - else if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_DEFER) - usleep_range(400, 500); - else if (ret == 0) - return -EPROTO; + u8 tx_buf[20]; + size_t tx_size; + u8 ack, delay = 0; + + if (WARN_ON(msg->size > 16)) + return -E2BIG; + + tx_buf[0] = msg->address & 0xff; + tx_buf[1] = msg->address >> 8; + tx_buf[2] = msg->request << 4; + tx_buf[3] = msg->size ? (msg->size - 1) : 0; + + switch (msg->request & ~DP_AUX_I2C_MOT) { + case DP_AUX_NATIVE_WRITE: + case DP_AUX_I2C_WRITE: + /* tx_size needs to be 4 even for bare address packets since the atom + * table needs the info in tx_buf[3]. + */ + tx_size = HEADER_SIZE + msg->size; + if (msg->size == 0) + tx_buf[3] |= BARE_ADDRESS_SIZE << 4; else - return -EIO; - } - - return -EIO; -} - -static void radeon_write_dpcd_reg(struct radeon_connector *radeon_connector, - u16 reg, u8 val) -{ - radeon_dp_aux_native_write(radeon_connector, reg, &val, 1, 0); -} - -static u8 radeon_read_dpcd_reg(struct radeon_connector *radeon_connector, - u16 reg) -{ - u8 val = 0; - - radeon_dp_aux_native_read(radeon_connector, reg, &val, 1, 0); - - return val; -} - -int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode, - u8 write_byte, u8 *read_byte) -{ - struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; - struct radeon_i2c_chan *auxch = (struct radeon_i2c_chan *)adapter; - u16 address = algo_data->address; - u8 msg[5]; - u8 reply[2]; - unsigned retry; - int msg_bytes; - int reply_bytes = 1; - int ret; - u8 ack; - - /* Set up the command byte */ - if (mode & MODE_I2C_READ) - msg[2] = DP_AUX_I2C_READ << 4; - else - msg[2] = DP_AUX_I2C_WRITE << 4; - - if (!(mode & MODE_I2C_STOP)) - msg[2] |= DP_AUX_I2C_MOT << 4; - - msg[0] = address; - msg[1] = address >> 8; - - switch (mode) { - case MODE_I2C_WRITE: - msg_bytes = 5; - msg[3] = msg_bytes << 4; - msg[4] = write_byte; + tx_buf[3] |= tx_size << 4; + memcpy(tx_buf + HEADER_SIZE, msg->buffer, msg->size); + ret = radeon_process_aux_ch(chan, + tx_buf, tx_size, NULL, 0, delay, &ack); + if (ret >= 0) + /* Return payload size. */ + ret = msg->size; break; - case MODE_I2C_READ: - msg_bytes = 4; - msg[3] = msg_bytes << 4; + case DP_AUX_NATIVE_READ: + case DP_AUX_I2C_READ: + /* tx_size needs to be 4 even for bare address packets since the atom + * table needs the info in tx_buf[3]. + */ + tx_size = HEADER_SIZE; + if (msg->size == 0) + tx_buf[3] |= BARE_ADDRESS_SIZE << 4; + else + tx_buf[3] |= tx_size << 4; + ret = radeon_process_aux_ch(chan, + tx_buf, tx_size, msg->buffer, msg->size, delay, &ack); break; default: - msg_bytes = 4; - msg[3] = 3 << 4; + ret = -EINVAL; break; } - for (retry = 0; retry < 7; retry++) { - ret = radeon_process_aux_ch(auxch, - msg, msg_bytes, reply, reply_bytes, 0, &ack); - if (ret == -EBUSY) - continue; - else if (ret < 0) { - DRM_DEBUG_KMS("aux_ch failed %d\n", ret); - return ret; - } + if (ret >= 0) + msg->reply = ack >> 4; - switch ((ack >> 4) & DP_AUX_NATIVE_REPLY_MASK) { - case DP_AUX_NATIVE_REPLY_ACK: - /* I2C-over-AUX Reply field is only valid - * when paired with AUX ACK. - */ - break; - case DP_AUX_NATIVE_REPLY_NACK: - DRM_DEBUG_KMS("aux_ch native nack\n"); - return -EREMOTEIO; - case DP_AUX_NATIVE_REPLY_DEFER: - DRM_DEBUG_KMS("aux_ch native defer\n"); - usleep_range(500, 600); - continue; - default: - DRM_ERROR("aux_ch invalid native reply 0x%02x\n", ack); - return -EREMOTEIO; - } + return ret; +} - switch ((ack >> 4) & DP_AUX_I2C_REPLY_MASK) { - case DP_AUX_I2C_REPLY_ACK: - if (mode == MODE_I2C_READ) - *read_byte = reply[0]; - return ret; - case DP_AUX_I2C_REPLY_NACK: - DRM_DEBUG_KMS("aux_i2c nack\n"); - return -EREMOTEIO; - case DP_AUX_I2C_REPLY_DEFER: - DRM_DEBUG_KMS("aux_i2c defer\n"); - usleep_range(400, 500); - break; - default: - DRM_ERROR("aux_i2c invalid reply 0x%02x\n", ack); - return -EREMOTEIO; - } - } +void radeon_dp_aux_init(struct radeon_connector *radeon_connector) +{ + int ret; - DRM_DEBUG_KMS("aux i2c too many retries, giving up\n"); - return -EREMOTEIO; + radeon_connector->ddc_bus->rec.hpd = radeon_connector->hpd.hpd; + radeon_connector->ddc_bus->aux.dev = radeon_connector->base.kdev; + radeon_connector->ddc_bus->aux.transfer = radeon_dp_aux_transfer; + ret = drm_dp_aux_register_i2c_bus(&radeon_connector->ddc_bus->aux); + if (!ret) + radeon_connector->ddc_bus->has_aux = true; + + WARN(ret, "drm_dp_aux_register_i2c_bus() failed with error %d\n", ret); } /***** general DP utility functions *****/ @@ -456,12 +351,11 @@ static u8 radeon_dp_encoder_service(struct radeon_device *rdev, u8 radeon_dp_getsinktype(struct radeon_connector *radeon_connector) { - struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; struct drm_device *dev = radeon_connector->base.dev; struct radeon_device *rdev = dev->dev_private; return radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_GET_SINK_TYPE, 0, - dig_connector->dp_i2c_bus->rec.i2c_id, 0); + radeon_connector->ddc_bus->rec.i2c_id, 0); } static void radeon_dp_probe_oui(struct radeon_connector *radeon_connector) @@ -472,11 +366,11 @@ static void radeon_dp_probe_oui(struct radeon_connector *radeon_connector) if (!(dig_connector->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT)) return; - if (radeon_dp_aux_native_read(radeon_connector, DP_SINK_OUI, buf, 3, 0)) + if (drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_SINK_OUI, buf, 3) == 3) DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n", buf[0], buf[1], buf[2]); - if (radeon_dp_aux_native_read(radeon_connector, DP_BRANCH_OUI, buf, 3, 0)) + if (drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_BRANCH_OUI, buf, 3) == 3) DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n", buf[0], buf[1], buf[2]); } @@ -487,8 +381,8 @@ bool radeon_dp_getdpcd(struct radeon_connector *radeon_connector) u8 msg[DP_DPCD_SIZE]; int ret, i; - ret = radeon_dp_aux_native_read(radeon_connector, DP_DPCD_REV, msg, - DP_DPCD_SIZE, 0); + ret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_DPCD_REV, msg, + DP_DPCD_SIZE); if (ret > 0) { memcpy(dig_connector->dpcd, msg, DP_DPCD_SIZE); DRM_DEBUG_KMS("DPCD: "); @@ -510,6 +404,7 @@ int radeon_dp_get_panel_mode(struct drm_encoder *encoder, struct drm_device *dev = encoder->dev; struct radeon_device *rdev = dev->dev_private; struct radeon_connector *radeon_connector = to_radeon_connector(connector); + struct radeon_connector_atom_dig *dig_connector; int panel_mode = DP_PANEL_MODE_EXTERNAL_DP_MODE; u16 dp_bridge = radeon_connector_encoder_get_dp_bridge_encoder_id(connector); u8 tmp; @@ -517,21 +412,30 @@ int radeon_dp_get_panel_mode(struct drm_encoder *encoder, if (!ASIC_IS_DCE4(rdev)) return panel_mode; + if (!radeon_connector->con_priv) + return panel_mode; + + dig_connector = radeon_connector->con_priv; + if (dp_bridge != ENCODER_OBJECT_ID_NONE) { /* DP bridge chips */ - tmp = radeon_read_dpcd_reg(radeon_connector, DP_EDP_CONFIGURATION_CAP); - if (tmp & 1) - panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE; - else if ((dp_bridge == ENCODER_OBJECT_ID_NUTMEG) || - (dp_bridge == ENCODER_OBJECT_ID_TRAVIS)) - panel_mode = DP_PANEL_MODE_INTERNAL_DP1_MODE; - else - panel_mode = DP_PANEL_MODE_EXTERNAL_DP_MODE; + if (drm_dp_dpcd_readb(&radeon_connector->ddc_bus->aux, + DP_EDP_CONFIGURATION_CAP, &tmp) == 1) { + if (tmp & 1) + panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE; + else if ((dp_bridge == ENCODER_OBJECT_ID_NUTMEG) || + (dp_bridge == ENCODER_OBJECT_ID_TRAVIS)) + panel_mode = DP_PANEL_MODE_INTERNAL_DP1_MODE; + else + panel_mode = DP_PANEL_MODE_EXTERNAL_DP_MODE; + } } else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) { /* eDP */ - tmp = radeon_read_dpcd_reg(radeon_connector, DP_EDP_CONFIGURATION_CAP); - if (tmp & 1) - panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE; + if (drm_dp_dpcd_readb(&radeon_connector->ddc_bus->aux, + DP_EDP_CONFIGURATION_CAP, &tmp) == 1) { + if (tmp & 1) + panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE; + } } return panel_mode; @@ -577,37 +481,43 @@ int radeon_dp_mode_valid_helper(struct drm_connector *connector, return MODE_OK; } -static bool radeon_dp_get_link_status(struct radeon_connector *radeon_connector, - u8 link_status[DP_LINK_STATUS_SIZE]) -{ - int ret; - ret = radeon_dp_aux_native_read(radeon_connector, DP_LANE0_1_STATUS, - link_status, DP_LINK_STATUS_SIZE, 100); - if (ret <= 0) { - return false; - } - - DRM_DEBUG_KMS("link status %6ph\n", link_status); - return true; -} - bool radeon_dp_needs_link_train(struct radeon_connector *radeon_connector) { u8 link_status[DP_LINK_STATUS_SIZE]; struct radeon_connector_atom_dig *dig = radeon_connector->con_priv; - if (!radeon_dp_get_link_status(radeon_connector, link_status)) + if (drm_dp_dpcd_read_link_status(&radeon_connector->ddc_bus->aux, link_status) + <= 0) return false; if (drm_dp_channel_eq_ok(link_status, dig->dp_lane_count)) return false; return true; } +void radeon_dp_set_rx_power_state(struct drm_connector *connector, + u8 power_state) +{ + struct radeon_connector *radeon_connector = to_radeon_connector(connector); + struct radeon_connector_atom_dig *dig_connector; + + if (!radeon_connector->con_priv) + return; + + dig_connector = radeon_connector->con_priv; + + /* power up/down the sink */ + if (dig_connector->dpcd[0] >= 0x11) { + drm_dp_dpcd_writeb(&radeon_connector->ddc_bus->aux, + DP_SET_POWER, power_state); + usleep_range(1000, 2000); + } +} + + struct radeon_dp_link_train_info { struct radeon_device *rdev; struct drm_encoder *encoder; struct drm_connector *connector; - struct radeon_connector *radeon_connector; int enc_id; int dp_clock; int dp_lane_count; @@ -617,6 +527,7 @@ struct radeon_dp_link_train_info { u8 link_status[DP_LINK_STATUS_SIZE]; u8 tries; bool use_dpencoder; + struct drm_dp_aux *aux; }; static void radeon_dp_update_vs_emph(struct radeon_dp_link_train_info *dp_info) @@ -627,8 +538,8 @@ static void radeon_dp_update_vs_emph(struct radeon_dp_link_train_info *dp_info) 0, dp_info->train_set[0]); /* sets all lanes at once */ /* set the vs/emph on the sink */ - radeon_dp_aux_native_write(dp_info->radeon_connector, DP_TRAINING_LANE0_SET, - dp_info->train_set, dp_info->dp_lane_count, 0); + drm_dp_dpcd_write(dp_info->aux, DP_TRAINING_LANE0_SET, + dp_info->train_set, dp_info->dp_lane_count); } static void radeon_dp_set_tp(struct radeon_dp_link_train_info *dp_info, int tp) @@ -663,7 +574,7 @@ static void radeon_dp_set_tp(struct radeon_dp_link_train_info *dp_info, int tp) } /* enable training pattern on the sink */ - radeon_write_dpcd_reg(dp_info->radeon_connector, DP_TRAINING_PATTERN_SET, tp); + drm_dp_dpcd_writeb(dp_info->aux, DP_TRAINING_PATTERN_SET, tp); } static int radeon_dp_link_train_init(struct radeon_dp_link_train_info *dp_info) @@ -673,34 +584,30 @@ 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); - usleep_range(1000, 2000); - } + radeon_dp_set_rx_power_state(dp_info->connector, 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); + drm_dp_dpcd_writeb(dp_info->aux, + DP_DOWNSPREAD_CTRL, DP_SPREAD_AMP_0_5); else - radeon_write_dpcd_reg(dp_info->radeon_connector, - DP_DOWNSPREAD_CTRL, 0); + drm_dp_dpcd_writeb(dp_info->aux, + 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); + drm_dp_dpcd_writeb(dp_info->aux, 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); + drm_dp_dpcd_writeb(dp_info->aux, 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); + drm_dp_dpcd_writeb(dp_info->aux, DP_LINK_BW_SET, tmp); /* start training on the source */ if (ASIC_IS_DCE4(dp_info->rdev) || !dp_info->use_dpencoder) @@ -711,9 +618,9 @@ static int radeon_dp_link_train_init(struct radeon_dp_link_train_info *dp_info) 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); + drm_dp_dpcd_writeb(dp_info->aux, + DP_TRAINING_PATTERN_SET, + DP_TRAINING_PATTERN_DISABLE); return 0; } @@ -723,9 +630,9 @@ static int radeon_dp_link_train_finish(struct radeon_dp_link_train_info *dp_info 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); + drm_dp_dpcd_writeb(dp_info->aux, + 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) @@ -757,7 +664,8 @@ static int radeon_dp_link_train_cr(struct radeon_dp_link_train_info *dp_info) while (1) { drm_dp_link_train_clock_recovery_delay(dp_info->dpcd); - if (!radeon_dp_get_link_status(dp_info->radeon_connector, dp_info->link_status)) { + if (drm_dp_dpcd_read_link_status(dp_info->aux, + dp_info->link_status) <= 0) { DRM_ERROR("displayport link status failed\n"); break; } @@ -819,7 +727,8 @@ static int radeon_dp_link_train_ce(struct radeon_dp_link_train_info *dp_info) while (1) { drm_dp_link_train_channel_eq_delay(dp_info->dpcd); - if (!radeon_dp_get_link_status(dp_info->radeon_connector, dp_info->link_status)) { + if (drm_dp_dpcd_read_link_status(dp_info->aux, + dp_info->link_status) <= 0) { DRM_ERROR("displayport link status failed\n"); break; } @@ -902,19 +811,23 @@ void radeon_dp_link_train(struct drm_encoder *encoder, else dp_info.enc_id |= ATOM_DP_CONFIG_LINK_A; - tmp = radeon_read_dpcd_reg(radeon_connector, DP_MAX_LANE_COUNT); - if (ASIC_IS_DCE5(rdev) && (tmp & DP_TPS3_SUPPORTED)) - dp_info.tp3_supported = true; - else + if (drm_dp_dpcd_readb(&radeon_connector->ddc_bus->aux, DP_MAX_LANE_COUNT, &tmp) + == 1) { + if (ASIC_IS_DCE5(rdev) && (tmp & DP_TPS3_SUPPORTED)) + dp_info.tp3_supported = true; + else + dp_info.tp3_supported = false; + } else { dp_info.tp3_supported = false; + } memcpy(dp_info.dpcd, dig_connector->dpcd, DP_RECEIVER_CAP_SIZE); dp_info.rdev = rdev; dp_info.encoder = encoder; dp_info.connector = connector; - dp_info.radeon_connector = radeon_connector; dp_info.dp_lane_count = dig_connector->dp_lane_count; dp_info.dp_clock = dig_connector->dp_clock; + dp_info.aux = &radeon_connector->ddc_bus->aux; if (radeon_dp_link_train_init(&dp_info)) goto done; |