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: &dce_i2c_sw, ddc_handle: ddc)) { |
79 | return dce_i2c_submit_command_sw(pool, ddc, cmd, dce_i2c_sw: &dce_i2c_sw); |
80 | } |
81 | |
82 | return false; |
83 | } |
84 | |