1 /* 2 * Copyright 2018 Advanced Micro Devices, Inc. 3 * 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: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 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 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: AMD 23 * 24 */ 25 #include "dce_i2c.h" 26 #include "reg_helper.h" 27 28 bool dce_i2c_oem_device_present( 29 struct resource_pool *pool, 30 struct ddc_service *ddc, 31 size_t slave_address 32 ) 33 { 34 struct dc *dc = ddc->ctx->dc; 35 struct dc_bios *dcb = dc->ctx->dc_bios; 36 struct graphics_object_id id = {0}; 37 struct graphics_object_i2c_info i2c_info; 38 39 if (!dc->ctx->dc_bios->fw_info.oem_i2c_present) 40 return false; 41 42 id.id = dc->ctx->dc_bios->fw_info.oem_i2c_obj_id; 43 id.enum_id = 0; 44 id.type = OBJECT_TYPE_GENERIC; 45 if (dcb->funcs->get_i2c_info(dcb, id, &i2c_info) != BP_RESULT_OK) 46 return false; 47 48 if (i2c_info.i2c_slave_address != slave_address) 49 return false; 50 51 return true; 52 } 53 54 bool dce_i2c_submit_command( 55 struct resource_pool *pool, 56 struct ddc *ddc, 57 struct i2c_command *cmd) 58 { 59 struct dce_i2c_hw *dce_i2c_hw; 60 struct dce_i2c_sw dce_i2c_sw = {0}; 61 62 if (!ddc) { 63 BREAK_TO_DEBUGGER(); 64 return false; 65 } 66 67 if (!cmd) { 68 BREAK_TO_DEBUGGER(); 69 return false; 70 } 71 72 dce_i2c_hw = acquire_i2c_hw_engine(pool, ddc); 73 74 if (dce_i2c_hw) 75 return dce_i2c_submit_command_hw(pool, ddc, cmd, dce_i2c_hw); 76 77 dce_i2c_sw.ctx = ddc->ctx; 78 if (dce_i2c_engine_acquire_sw(&dce_i2c_sw, ddc)) { 79 return dce_i2c_submit_command_sw(pool, ddc, cmd, &dce_i2c_sw); 80 } 81 82 return false; 83 } 84