diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c | 114 |
1 files changed, 94 insertions, 20 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c index 71c359f9cdd2..8b9b1a5309ba 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c @@ -100,6 +100,35 @@ static uint8_t phy_id_from_transmitter(enum transmitter t) return phy_id; } +static bool has_query_dp_alt(struct link_encoder *enc) +{ + struct dc_dmub_srv *dc_dmub_srv = enc->ctx->dmub_srv; + + /* Supports development firmware and firmware >= 4.0.11 */ + return dc_dmub_srv && + !(dc_dmub_srv->dmub->fw_version >= DMUB_FW_VERSION(4, 0, 0) && + dc_dmub_srv->dmub->fw_version <= DMUB_FW_VERSION(4, 0, 10)); +} + +static bool query_dp_alt_from_dmub(struct link_encoder *enc, + union dmub_rb_cmd *cmd) +{ + struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc); + struct dc_dmub_srv *dc_dmub_srv = enc->ctx->dmub_srv; + + memset(cmd, 0, sizeof(*cmd)); + cmd->query_dp_alt.header.type = DMUB_CMD__VBIOS; + cmd->query_dp_alt.header.sub_type = + DMUB_CMD__VBIOS_TRANSMITTER_QUERY_DP_ALT; + cmd->query_dp_alt.header.payload_bytes = sizeof(cmd->query_dp_alt.data); + cmd->query_dp_alt.data.phy_id = phy_id_from_transmitter(enc10->base.transmitter); + + if (!dc_dmub_srv_cmd_with_reply_data(dc_dmub_srv, cmd)) + return false; + + return true; +} + void dcn31_link_encoder_set_dio_phy_mux( struct link_encoder *enc, enum encoder_type_select sel, @@ -569,45 +598,90 @@ void dcn31_link_encoder_disable_output( bool dcn31_link_encoder_is_in_alt_mode(struct link_encoder *enc) { struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc); - struct dc_dmub_srv *dc_dmub_srv = enc->ctx->dmub_srv; union dmub_rb_cmd cmd; - bool is_usb_c_alt_mode = false; + uint32_t dp_alt_mode_disable; - if (enc->features.flags.bits.DP_IS_USB_C && dc_dmub_srv) { - memset(&cmd, 0, sizeof(cmd)); - cmd.query_dp_alt.header.type = DMUB_CMD__VBIOS; - cmd.query_dp_alt.header.sub_type = DMUB_CMD__VBIOS_TRANSMITTER_QUERY_DP_ALT; - cmd.query_dp_alt.header.payload_bytes = sizeof(cmd.panel_cntl.data); - cmd.query_dp_alt.data.phy_id = phy_id_from_transmitter(enc10->base.transmitter); + /* Only applicable to USB-C PHY. */ + if (!enc->features.flags.bits.DP_IS_USB_C) + return false; - if (!dc_dmub_srv_cmd_with_reply_data(dc_dmub_srv, &cmd)) + /* + * Use the new interface from DMCUB if available. + * Avoids hanging the RDCPSPIPE if DMCUB wasn't already running. + */ + if (has_query_dp_alt(enc)) { + if (!query_dp_alt_from_dmub(enc, &cmd)) return false; - is_usb_c_alt_mode = (cmd.query_dp_alt.data.is_dp_alt_disable == 0); + return (cmd.query_dp_alt.data.is_dp_alt_disable == 0); } - return is_usb_c_alt_mode; + /* Legacy path, avoid if possible. */ + if (enc->ctx->asic_id.hw_internal_rev != YELLOW_CARP_B0) { + REG_GET(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, + &dp_alt_mode_disable); + } else { + /* + * B0 phys use a new set of registers to check whether alt mode is disabled. + * if value == 1 alt mode is disabled, otherwise it is enabled. + */ + if ((enc10->base.transmitter == TRANSMITTER_UNIPHY_A) || + (enc10->base.transmitter == TRANSMITTER_UNIPHY_B) || + (enc10->base.transmitter == TRANSMITTER_UNIPHY_E)) { + REG_GET(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, + &dp_alt_mode_disable); + } else { + REG_GET(RDPCSPIPE_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, + &dp_alt_mode_disable); + } + } + + return (dp_alt_mode_disable == 0); } void dcn31_link_encoder_get_max_link_cap(struct link_encoder *enc, struct dc_link_settings *link_settings) { struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc); - struct dc_dmub_srv *dc_dmub_srv = enc->ctx->dmub_srv; union dmub_rb_cmd cmd; + uint32_t is_in_usb_c_dp4_mode = 0; dcn10_link_encoder_get_max_link_cap(enc, link_settings); - if (enc->features.flags.bits.DP_IS_USB_C && dc_dmub_srv) { - memset(&cmd, 0, sizeof(cmd)); - cmd.query_dp_alt.header.type = DMUB_CMD__VBIOS; - cmd.query_dp_alt.header.sub_type = DMUB_CMD__VBIOS_TRANSMITTER_QUERY_DP_ALT; - cmd.query_dp_alt.header.payload_bytes = sizeof(cmd.panel_cntl.data); - cmd.query_dp_alt.data.phy_id = phy_id_from_transmitter(enc10->base.transmitter); + /* Take the link cap directly if not USB */ + if (!enc->features.flags.bits.DP_IS_USB_C) + return; - if (!dc_dmub_srv_cmd_with_reply_data(dc_dmub_srv, &cmd)) + /* + * Use the new interface from DMCUB if available. + * Avoids hanging the RDCPSPIPE if DMCUB wasn't already running. + */ + if (has_query_dp_alt(enc)) { + if (!query_dp_alt_from_dmub(enc, &cmd)) return; - if (cmd.query_dp_alt.data.is_usb && cmd.query_dp_alt.data.is_dp4 == 0) + if (cmd.query_dp_alt.data.is_usb && + cmd.query_dp_alt.data.is_dp4 == 0) link_settings->lane_count = MIN(LANE_COUNT_TWO, link_settings->lane_count); + + return; } + + /* Legacy path, avoid if possible. */ + if (enc->ctx->asic_id.hw_internal_rev != YELLOW_CARP_B0) { + REG_GET(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DP4, + &is_in_usb_c_dp4_mode); + } else { + if ((enc10->base.transmitter == TRANSMITTER_UNIPHY_A) || + (enc10->base.transmitter == TRANSMITTER_UNIPHY_B) || + (enc10->base.transmitter == TRANSMITTER_UNIPHY_E)) { + REG_GET(RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DP4, + &is_in_usb_c_dp4_mode); + } else { + REG_GET(RDPCSPIPE_PHY_CNTL6, RDPCS_PHY_DPALT_DP4, + &is_in_usb_c_dp4_mode); + } + } + + if (!is_in_usb_c_dp4_mode) + link_settings->lane_count = MIN(LANE_COUNT_TWO, link_settings->lane_count); } |