2 * Copyright 2012-15 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
26 #ifndef __DAL_DDC_SERVICE_H__
27 #define __DAL_DDC_SERVICE_H__
31 #define AUX_POWER_UP_WA_DELAY 500
32 #define I2C_OVER_AUX_DEFER_WA_DELAY 70
33 #define DPVGA_DONGLE_AUX_DEFER_WA_DELAY 40
34 #define I2C_OVER_AUX_DEFER_WA_DELAY_1MS 1
35 #define LINK_AUX_DEFAULT_LTTPR_TIMEOUT_PERIOD 3200 /*us*/
36 #define LINK_AUX_DEFAULT_TIMEOUT_PERIOD 552 /*us*/
38 #define EDID_SEGMENT_SIZE 256
40 struct ddc_service *link_create_ddc_service(
41 struct ddc_service_init_data *ddc_init_data);
43 void link_destroy_ddc_service(struct ddc_service **ddc);
45 void set_ddc_transaction_type(
46 struct ddc_service *ddc,
47 enum ddc_transaction_type type);
49 uint32_t link_get_aux_defer_delay(struct ddc_service *ddc);
51 bool link_is_in_aux_transaction_mode(struct ddc_service *ddc);
53 bool try_to_configure_aux_timeout(struct ddc_service *ddc,
56 bool link_query_ddc_data(
57 struct ddc_service *ddc,
64 /* Attempt to submit an aux payload, retrying on timeouts, defers, and busy
65 * states as outlined in the DP spec. Returns true if the request was
68 * NOTE: The function requires explicit mutex on DM side in order to prevent
69 * potential race condition. DC components should call the dpcd read/write
70 * function in dm_helpers in order to access dpcd safely
72 bool link_aux_transfer_with_retries_no_mutex(struct ddc_service *ddc,
73 struct aux_payload *payload);
75 bool link_configure_fixed_vs_pe_retimer(
76 struct ddc_service *ddc,
80 bool link_query_fixed_vs_pe_retimer(
81 struct ddc_service *ddc,
85 uint32_t link_get_fixed_vs_pe_retimer_read_address(struct dc_link *link);
86 uint32_t link_get_fixed_vs_pe_retimer_write_address(struct dc_link *link);
90 struct ddc_service *ddc_service,
92 bool lte_340_scramble);
95 struct ddc_service *ddc_service);
97 void set_dongle_type(struct ddc_service *ddc,
98 enum display_dongle_type dongle_type);
100 struct ddc *get_ddc_pin(struct ddc_service *ddc_service);
102 int link_aux_transfer_raw(struct ddc_service *ddc,
103 struct aux_payload *payload,
104 enum aux_return_code_type *operation_result);
105 #endif /* __DAL_DDC_SERVICE_H__ */