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 | 207 |
1 files changed, 207 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 000000000000..f11a734da1db --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -0,0 +1,207 @@ +/* + * 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_types.h" +#include "grph_object_defs.h" + +struct dc_link_status { + struct dpcd_caps *dpcd_caps; +}; + +/* DP MST stream allocation (payload bandwidth number) */ +struct link_mst_stream_allocation { + /* DIG front */ + const struct stream_encoder *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]; +}; + +/* + * 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 */ + /* 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; + struct dc_link_settings preferred_link_setting; + + uint8_t ddc_hw_inst; + + uint8_t hpd_src; + + uint8_t link_enc_hw_inst; + + 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 link_encoder *link_enc; + struct graphics_object_id link_id; + union ddi_channel_mapping ddi_channel_mapping; + struct connector_device_tag_info device_tag; + struct dpcd_caps dpcd_caps; + unsigned short chip_caps; + unsigned int dpcd_sink_count; + enum edp_revision edp_revision; + bool psr_enabled; + + /* MST record stream using this link */ + struct link_flags { + bool dp_keep_receiver_powered; + } wa_flags; + struct link_mst_stream_allocation_table mst_stream_alloc_table; + + struct dc_link_status link_status; + +}; + +const struct dc_link_status *dc_link_get_status(const struct dc_link *dc_link); + +/* + * 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]; +} + +/* Set backlight level of an embedded panel (eDP, LVDS). */ +bool dc_link_set_backlight_level(const struct dc_link *dc_link, uint32_t level, + uint32_t frame_ramp, const struct dc_stream_state *stream); + +bool dc_link_set_psr_enable(const struct dc_link *dc_link, bool enable, bool wait); + +bool dc_link_get_psr_state(const struct dc_link *dc_link, uint32_t *psr_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); + +/* 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_HPD, + DETECT_REASON_HPDRX, +}; + +bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason); + +/* 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); + +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, + struct link_training_settings *lt_settings); + +enum link_training_result dc_link_dp_perform_link_training( + struct dc_link *link, + const struct dc_link_settings *link_setting, + bool skip_video_pattern); + +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, + const struct link_training_settings *p_link_settings, + const unsigned char *p_custom_pattern, + unsigned int cust_pattern_size); + +/* + * DPCD access interfaces + */ + +bool dc_submit_i2c( + struct dc *dc, + uint32_t link_index, + struct i2c_command *cmd); + +#endif /* DC_LINK_H_ */ |