diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h new file mode 100644 index 000000000000..f79e4a4a9db6 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h @@ -0,0 +1,79 @@ +/* + * Copyright 2022 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_DP_CAPABILITY_H__ +#define __DC_LINK_DP_CAPABILITY_H__ + +#include "link.h" + +bool detect_dp_sink_caps(struct dc_link *link); + +void detect_edp_sink_caps(struct dc_link *link); + +struct dc_link_settings dp_get_max_link_cap(struct dc_link *link); + + +enum dc_status dp_retrieve_lttpr_cap(struct dc_link *link); + +/* Convert PHY repeater count read from DPCD uint8_t. */ +uint8_t dp_parse_lttpr_repeater_count(uint8_t lttpr_repeater_count); + +bool dp_is_lttpr_present(struct dc_link *link); + +bool is_dp_active_dongle(const struct dc_link *link); + +bool is_dp_branch_device(const struct dc_link *link); + +void dpcd_write_cable_id_to_dprx(struct dc_link *link); + +/* Initialize output parameter lt_settings. */ +void dp_decide_training_settings( + struct dc_link *link, + const struct dc_link_settings *link_setting, + struct link_training_settings *lt_settings); + + +bool decide_edp_link_settings_with_dsc(struct dc_link *link, + struct dc_link_settings *link_setting, + uint32_t req_bw, + enum dc_link_rate max_link_rate); + +void dpcd_set_source_specific_data(struct dc_link *link); + +/*query dpcd for version and mst cap addresses*/ +bool read_is_mst_supported(struct dc_link *link); + +bool decide_fallback_link_setting( + struct dc_link *link, + struct dc_link_settings *max, + struct dc_link_settings *cur, + enum link_training_result training_result); + +bool dp_verify_link_cap_with_retries( + struct dc_link *link, + struct dc_link_settings *known_limit_link_setting, + int attempts); + +#endif /* __DC_LINK_DP_CAPABILITY_H__ */ |