diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dc_link.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_link.h | 561 |
1 files changed, 561 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h new file mode 100644 index 000000000..17f080f8a --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -0,0 +1,561 @@ +/* + * Copyright 2012-14 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: AMD + * + */ + +#ifndef DC_LINK_H_ +#define DC_LINK_H_ + +#include "dc.h" +#include "dc_types.h" +#include "grph_object_defs.h" + +struct link_resource; + +enum dc_link_fec_state { + dc_link_fec_not_ready, + dc_link_fec_ready, + dc_link_fec_enabled +}; + +struct dc_link_status { + bool link_active; + struct dpcd_caps *dpcd_caps; +}; + +struct dprx_states { + bool cable_id_written; +}; + +/* DP MST stream allocation (payload bandwidth number) */ +struct link_mst_stream_allocation { + /* DIG front */ + const struct stream_encoder *stream_enc; + /* HPO DP Stream Encoder */ + const struct hpo_dp_stream_encoder *hpo_dp_stream_enc; + /* associate DRM payload table with DC stream encoder */ + uint8_t vcp_id; + /* number of slots required for the DP stream in transport packet */ + uint8_t slot_count; +}; + +/* DP MST stream allocation table */ +struct link_mst_stream_allocation_table { + /* number of DP video streams */ + int stream_count; + /* array of stream allocations */ + struct link_mst_stream_allocation stream_allocations[MAX_CONTROLLER_NUM]; +}; + +struct edp_trace_power_timestamps { + uint64_t poweroff; + uint64_t poweron; +}; + +struct dp_trace_lt_counts { + unsigned int total; + unsigned int fail; +}; + +struct dp_trace_lt { + struct dp_trace_lt_counts counts; + struct dp_trace_timestamps { + unsigned long long start; + unsigned long long end; + } timestamps; + enum link_training_result result; + bool is_logged; +}; + +struct dp_trace { + struct dp_trace_lt detect_lt_trace; + struct dp_trace_lt commit_lt_trace; + unsigned int link_loss_count; + bool is_initialized; + struct edp_trace_power_timestamps edp_trace_power_timestamps; +}; + +/* PSR feature flags */ +struct psr_settings { + bool psr_feature_enabled; // PSR is supported by sink + bool psr_allow_active; // PSR is currently active + enum dc_psr_version psr_version; // Internal PSR version, determined based on DPCD + bool psr_vtotal_control_support; // Vtotal control is supported by sink + + /* These parameters are calculated in Driver, + * based on display timing and Sink capabilities. + * If VBLANK region is too small and Sink takes a long time + * to set up RFB, it may take an extra frame to enter PSR state. + */ + bool psr_frame_capture_indication_req; + unsigned int psr_sdp_transmit_line_num_deadline; + uint8_t force_ffu_mode; + unsigned int psr_power_opt; +}; + +/* To split out "global" and "per-panel" config settings. + * Add a struct dc_panel_config under dc_link + */ +struct dc_panel_config { + /* extra panel power sequence parameters */ + struct pps { + unsigned int extra_t3_ms; + unsigned int extra_t7_ms; + unsigned int extra_delay_backlight_off; + unsigned int extra_post_t7_ms; + unsigned int extra_pre_t11_ms; + unsigned int extra_t12_ms; + unsigned int extra_post_OUI_ms; + } pps; + /* PSR */ + struct psr { + bool disable_psr; + bool disallow_psrsu; + bool rc_disable; + bool rc_allow_static_screen; + bool rc_allow_fullscreen_VPB; + } psr; + /* ABM */ + struct varib { + unsigned int varibright_feature_enable; + unsigned int def_varibright_level; + unsigned int abm_config_setting; + } varib; + /* edp DSC */ + struct dsc { + bool disable_dsc_edp; + unsigned int force_dsc_edp_policy; + } dsc; + /* eDP ILR */ + struct ilr { + bool optimize_edp_link_rate; /* eDP ILR */ + } ilr; +}; +/* + * A link contains one or more sinks and their connected status. + * The currently active signal type (HDMI, DP-SST, DP-MST) is also reported. + */ +struct dc_link { + struct dc_sink *remote_sinks[MAX_SINKS_PER_LINK]; + unsigned int sink_count; + struct dc_sink *local_sink; + unsigned int link_index; + enum dc_connection_type type; + enum signal_type connector_signal; + enum dc_irq_source irq_source_hpd; + enum dc_irq_source irq_source_hpd_rx;/* aka DP Short Pulse */ + bool is_hpd_filter_disabled; + bool dp_ss_off; + bool link_state_valid; + bool aux_access_disabled; + bool sync_lt_in_progress; + bool is_internal_display; + + /* TODO: Rename. Flag an endpoint as having a programmable mapping to a + * DIG encoder. */ + bool is_dig_mapping_flexible; + bool hpd_status; /* HPD status of link without physical HPD pin. */ + bool is_hpd_pending; /* Indicates a new received hpd */ + + bool edp_sink_present; + + struct dp_trace dp_trace; + + /* caps is the same as reported_link_cap. link_traing use + * reported_link_cap. Will clean up. TODO + */ + struct dc_link_settings reported_link_cap; + struct dc_link_settings verified_link_cap; + struct dc_link_settings cur_link_settings; + struct dc_lane_settings cur_lane_setting[LANE_COUNT_DP_MAX]; + struct dc_link_settings preferred_link_setting; + /* preferred_training_settings are override values that + * come from DM. DM is responsible for the memory + * management of the override pointers. + */ + struct dc_link_training_overrides preferred_training_settings; + struct dp_audio_test_data audio_test_data; + + uint8_t ddc_hw_inst; + + uint8_t hpd_src; + + uint8_t link_enc_hw_inst; + /* DIG link encoder ID. Used as index in link encoder resource pool. + * For links with fixed mapping to DIG, this is not changed after dc_link + * object creation. + */ + enum engine_id eng_id; + + bool test_pattern_enabled; + union compliance_test_state compliance_test_state; + + void *priv; + + struct ddc_service *ddc; + + bool aux_mode; + + /* Private to DC core */ + + const struct dc *dc; + + struct dc_context *ctx; + + struct panel_cntl *panel_cntl; + struct link_encoder *link_enc; + struct graphics_object_id link_id; + /* Endpoint type distinguishes display endpoints which do not have entries + * in the BIOS connector table from those that do. Helps when tracking link + * encoder to display endpoint assignments. + */ + enum display_endpoint_type ep_type; + union ddi_channel_mapping ddi_channel_mapping; + struct connector_device_tag_info device_tag; + struct dpcd_caps dpcd_caps; + uint32_t dongle_max_pix_clk; + unsigned short chip_caps; + unsigned int dpcd_sink_count; +#if defined(CONFIG_DRM_AMD_DC_HDCP) + struct hdcp_caps hdcp_caps; +#endif + enum edp_revision edp_revision; + union dpcd_sink_ext_caps dpcd_sink_ext_caps; + + struct psr_settings psr_settings; + + /* Drive settings read from integrated info table */ + struct dc_lane_settings bios_forced_drive_settings; + + /* Vendor specific LTTPR workaround variables */ + uint8_t vendor_specific_lttpr_link_rate_wa; + bool apply_vendor_specific_lttpr_link_rate_wa; + + /* MST record stream using this link */ + struct link_flags { + bool dp_keep_receiver_powered; + bool dp_skip_DID2; + bool dp_skip_reset_segment; + bool dp_mot_reset_segment; + /* Some USB4 docks do not handle turning off MST DSC once it has been enabled. */ + bool dpia_mst_dsc_always_on; + /* Forced DPIA into TBT3 compatibility mode. */ + bool dpia_forced_tbt3_mode; + bool dongle_mode_timing_override; + } wa_flags; + struct link_mst_stream_allocation_table mst_stream_alloc_table; + + struct dc_link_status link_status; + struct dprx_states dprx_states; + + struct gpio *hpd_gpio; + enum dc_link_fec_state fec_state; + struct dc_panel_config panel_config; + struct phy_state phy_state; +}; + +const struct dc_link_status *dc_link_get_status(const struct dc_link *dc_link); + +/** + * dc_get_link_at_index() - Return an enumerated dc_link. + * + * dc_link order is constant and determined at + * boot time. They cannot be created or destroyed. + * Use dc_get_caps() to get number of links. + */ +static inline struct dc_link *dc_get_link_at_index(struct dc *dc, uint32_t link_index) +{ + return dc->links[link_index]; +} + +static inline void get_edp_links(const struct dc *dc, + struct dc_link **edp_links, + int *edp_num) +{ + int i; + + *edp_num = 0; + for (i = 0; i < dc->link_count; i++) { + // report any eDP links, even unconnected DDI's + if (!dc->links[i]) + continue; + if (dc->links[i]->connector_signal == SIGNAL_TYPE_EDP) { + edp_links[*edp_num] = dc->links[i]; + if (++(*edp_num) == MAX_NUM_EDP) + return; + } + } +} + +static inline bool dc_get_edp_link_panel_inst(const struct dc *dc, + const struct dc_link *link, + unsigned int *inst_out) +{ + struct dc_link *edp_links[MAX_NUM_EDP]; + int edp_num; + + if (link->connector_signal != SIGNAL_TYPE_EDP) + return false; + get_edp_links(dc, edp_links, &edp_num); + if ((edp_num > 1) && (link->link_index > edp_links[0]->link_index)) + *inst_out = 1; + else + *inst_out = 0; + return true; +} + +/* Set backlight level of an embedded panel (eDP, LVDS). + * backlight_pwm_u16_16 is unsigned 32 bit with 16 bit integer + * and 16 bit fractional, where 1.0 is max backlight value. + */ +bool dc_link_set_backlight_level(const struct dc_link *dc_link, + uint32_t backlight_pwm_u16_16, + uint32_t frame_ramp); + +/* Set/get nits-based backlight level of an embedded panel (eDP, LVDS). */ +bool dc_link_set_backlight_level_nits(struct dc_link *link, + bool isHDR, + uint32_t backlight_millinits, + uint32_t transition_time_in_ms); + +bool dc_link_get_backlight_level_nits(struct dc_link *link, + uint32_t *backlight_millinits, + uint32_t *backlight_millinits_peak); + +bool dc_link_backlight_enable_aux(struct dc_link *link, bool enable); + +bool dc_link_read_default_bl_aux(struct dc_link *link, uint32_t *backlight_millinits); +bool dc_link_set_default_brightness_aux(struct dc_link *link); + +int dc_link_get_backlight_level(const struct dc_link *dc_link); + +int dc_link_get_target_backlight_pwm(const struct dc_link *link); + +bool dc_link_set_psr_allow_active(struct dc_link *dc_link, const bool *enable, + bool wait, bool force_static, const unsigned int *power_opts); + +bool dc_link_get_psr_state(const struct dc_link *dc_link, enum dc_psr_state *state); + +bool dc_link_setup_psr(struct dc_link *dc_link, + const struct dc_stream_state *stream, struct psr_config *psr_config, + struct psr_context *psr_context); + +bool dc_power_alpm_dpcd_enable(struct dc_link *link, bool enable); + +void dc_link_get_psr_residency(const struct dc_link *link, uint32_t *residency); + +void dc_link_blank_all_dp_displays(struct dc *dc); +void dc_link_blank_all_edp_displays(struct dc *dc); + +void dc_link_blank_dp_stream(struct dc_link *link, bool hw_init); +bool dc_link_set_sink_vtotal_in_psr_active(const struct dc_link *link, + uint16_t psr_vtotal_idle, uint16_t psr_vtotal_su); + +/* Request DC to detect if there is a Panel connected. + * boot - If this call is during initial boot. + * Return false for any type of detection failure or MST detection + * true otherwise. True meaning further action is required (status update + * and OS notification). + */ +enum dc_detect_reason { + DETECT_REASON_BOOT, + DETECT_REASON_RESUMEFROMS3S4, + DETECT_REASON_HPD, + DETECT_REASON_HPDRX, + DETECT_REASON_FALLBACK, + DETECT_REASON_RETRAIN, + DETECT_REASON_TDR, +}; + +bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason); +bool dc_link_get_hpd_state(struct dc_link *dc_link); +enum dc_status dc_link_allocate_mst_payload(struct pipe_ctx *pipe_ctx); +enum dc_status dc_link_reduce_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn); +enum dc_status dc_link_increase_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn); + +/* Notify DC about DP RX Interrupt (aka Short Pulse Interrupt). + * Return: + * true - Downstream port status changed. DM should call DC to do the + * detection. + * false - no change in Downstream port status. No further action required + * from DM. */ +bool dc_link_handle_hpd_rx_irq(struct dc_link *dc_link, + union hpd_irq_data *hpd_irq_dpcd_data, bool *out_link_loss, + bool defer_handling, bool *has_left_work); + +/* + * On eDP links this function call will stall until T12 has elapsed. + * If the panel is not in power off state, this function will return + * immediately. + */ +bool dc_link_wait_for_t12(struct dc_link *link); + +void dc_link_dp_handle_automated_test(struct dc_link *link); +void dc_link_dp_handle_link_loss(struct dc_link *link); +bool dc_link_dp_allow_hpd_rx_irq(const struct dc_link *link); + +struct dc_sink_init_data; + +struct dc_sink *dc_link_add_remote_sink( + struct dc_link *dc_link, + const uint8_t *edid, + int len, + struct dc_sink_init_data *init_data); + +void dc_link_remove_remote_sink( + struct dc_link *link, + struct dc_sink *sink); + +/* Used by diagnostics for virtual link at the moment */ + +void dc_link_dp_set_drive_settings( + struct dc_link *link, + const struct link_resource *link_res, + struct link_training_settings *lt_settings); + +bool dc_link_dp_perform_link_training_skip_aux( + struct dc_link *link, + const struct link_resource *link_res, + const struct dc_link_settings *link_setting); + +enum link_training_result dc_link_dp_perform_link_training( + struct dc_link *link, + const struct link_resource *link_res, + const struct dc_link_settings *link_settings, + bool skip_video_pattern); + +bool dc_link_dp_sync_lt_begin(struct dc_link *link); + +enum link_training_result dc_link_dp_sync_lt_attempt( + struct dc_link *link, + const struct link_resource *link_res, + struct dc_link_settings *link_setting, + struct dc_link_training_overrides *lt_settings); + +bool dc_link_dp_sync_lt_end(struct dc_link *link, bool link_down); + +void dc_link_dp_enable_hpd(const struct dc_link *link); + +void dc_link_dp_disable_hpd(const struct dc_link *link); + +bool dc_link_dp_set_test_pattern( + struct dc_link *link, + enum dp_test_pattern test_pattern, + enum dp_test_pattern_color_space test_pattern_color_space, + const struct link_training_settings *p_link_settings, + const unsigned char *p_custom_pattern, + unsigned int cust_pattern_size); + +bool dc_link_dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap); + +void dc_link_enable_hpd_filter(struct dc_link *link, bool enable); + +bool dc_link_is_dp_sink_present(struct dc_link *link); + +bool dc_link_detect_sink(struct dc_link *link, enum dc_connection_type *type); +/* + * DPCD access interfaces + */ + +#ifdef CONFIG_DRM_AMD_DC_HDCP +bool dc_link_is_hdcp14(struct dc_link *link, enum signal_type signal); +bool dc_link_is_hdcp22(struct dc_link *link, enum signal_type signal); +#endif +void dc_link_set_drive_settings(struct dc *dc, + struct link_training_settings *lt_settings, + const struct dc_link *link); +void dc_link_set_preferred_link_settings(struct dc *dc, + struct dc_link_settings *link_setting, + struct dc_link *link); +void dc_link_set_preferred_training_settings(struct dc *dc, + struct dc_link_settings *link_setting, + struct dc_link_training_overrides *lt_overrides, + struct dc_link *link, + bool skip_immediate_retrain); +void dc_link_enable_hpd(const struct dc_link *link); +void dc_link_disable_hpd(const struct dc_link *link); +void dc_link_set_test_pattern(struct dc_link *link, + enum dp_test_pattern test_pattern, + enum dp_test_pattern_color_space test_pattern_color_space, + const struct link_training_settings *p_link_settings, + const unsigned char *p_custom_pattern, + unsigned int cust_pattern_size); +uint32_t dc_link_bandwidth_kbps( + const struct dc_link *link, + const struct dc_link_settings *link_setting); + +const struct dc_link_settings *dc_link_get_link_cap( + const struct dc_link *link); + +void dc_link_overwrite_extended_receiver_cap( + struct dc_link *link); + +bool dc_is_oem_i2c_device_present( + struct dc *dc, + size_t slave_address +); + +bool dc_submit_i2c( + struct dc *dc, + uint32_t link_index, + struct i2c_command *cmd); + +bool dc_submit_i2c_oem( + struct dc *dc, + struct i2c_command *cmd); + +uint32_t dc_bandwidth_in_kbps_from_timing( + const struct dc_crtc_timing *timing); + +bool dc_link_is_fec_supported(const struct dc_link *link); +bool dc_link_should_enable_fec(const struct dc_link *link); + +uint32_t dc_link_bw_kbps_from_raw_frl_link_rate_data(uint8_t bw); +enum dp_link_encoding dc_link_dp_mst_decide_link_encoding_format(const struct dc_link *link); + +void dc_link_get_cur_link_res(const struct dc_link *link, + struct link_resource *link_res); +/* take a snapshot of current link resource allocation state */ +void dc_get_cur_link_res_map(const struct dc *dc, uint32_t *map); +/* restore link resource allocation state from a snapshot */ +void dc_restore_link_res_map(const struct dc *dc, uint32_t *map); +void dc_link_clear_dprx_states(struct dc_link *link); +struct gpio *get_hpd_gpio(struct dc_bios *dcb, + struct graphics_object_id link_id, + struct gpio_service *gpio_service); +void dp_trace_reset(struct dc_link *link); +bool dc_dp_trace_is_initialized(struct dc_link *link); +unsigned long long dc_dp_trace_get_lt_end_timestamp(struct dc_link *link, + bool in_detection); +void dc_dp_trace_set_is_logged_flag(struct dc_link *link, + bool in_detection, + bool is_logged); +bool dc_dp_trace_is_logged(struct dc_link *link, + bool in_detection); +struct dp_trace_lt_counts *dc_dp_trace_get_lt_counts(struct dc_link *link, + bool in_detection); +unsigned int dc_dp_trace_get_link_loss_count(struct dc_link *link); + +/* Destruct the mst topology of the link and reset the allocated payload table */ +bool reset_cur_dp_mst_topology(struct dc_link *link); +#endif /* DC_LINK_H_ */ |