1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.
3 // Copyright (c) 2018, Linaro Limited
4
5 #include "q6dsp-common.h"
6 #include <linux/kernel.h>
7 #include <linux/module.h>
8 #include <linux/string.h>
9 #include <linux/errno.h>
10
11 int q6dsp_map_channels(u8 ch_map[PCM_MAX_NUM_CHANNEL], int ch)
12 {
13 memset(ch_map, 0, PCM_MAX_NUM_CHANNEL);
14
15 switch (ch) {
16 case 1:
17 ch_map[0] = PCM_CHANNEL_FC;
18 break;
19 case 2:
20 ch_map[0] = PCM_CHANNEL_FL;
21 ch_map[1] = PCM_CHANNEL_FR;
22 break;
23 case 3:
24 ch_map[0] = PCM_CHANNEL_FL;
25 ch_map[1] = PCM_CHANNEL_FR;
26 ch_map[2] = PCM_CHANNEL_FC;
27 break;
28 case 4:
29 ch_map[0] = PCM_CHANNEL_FL;
30 ch_map[1] = PCM_CHANNEL_FR;
31 ch_map[2] = PCM_CHANNEL_LS;
32 ch_map[3] = PCM_CHANNEL_RS;
33 break;
34 case 5:
35 ch_map[0] = PCM_CHANNEL_FL;
36 ch_map[1] = PCM_CHANNEL_FR;
37 ch_map[2] = PCM_CHANNEL_FC;
38 ch_map[3] = PCM_CHANNEL_LS;
39 ch_map[4] = PCM_CHANNEL_RS;
40 break;
41 case 6:
42 ch_map[0] = PCM_CHANNEL_FL;
43 ch_map[1] = PCM_CHANNEL_FR;
44 ch_map[2] = PCM_CHANNEL_LFE;
45 ch_map[3] = PCM_CHANNEL_FC;
46 ch_map[4] = PCM_CHANNEL_LS;
47 ch_map[5] = PCM_CHANNEL_RS;
48 break;
49 case 8:
50 ch_map[0] = PCM_CHANNEL_FL;
51 ch_map[1] = PCM_CHANNEL_FR;
52 ch_map[2] = PCM_CHANNEL_LFE;
53 ch_map[3] = PCM_CHANNEL_FC;
54 ch_map[4] = PCM_CHANNEL_LS;
55 ch_map[5] = PCM_CHANNEL_RS;
56 ch_map[6] = PCM_CHANNEL_LB;
57 ch_map[7] = PCM_CHANNEL_RB;
58 break;
59 default:
60 return -EINVAL;
61 }
62
63 return 0;
64 }
65 EXPORT_SYMBOL_GPL(q6dsp_map_channels);
66
67 int q6dsp_get_channel_allocation(int channels)
68 {
69 int channel_allocation;
70
71 /* HDMI spec CEA-861-E: Table 28 Audio InfoFrame Data Byte 4 */
72 switch (channels) {
73 case 2:
74 channel_allocation = 0;
75 break;
76 case 3:
77 channel_allocation = 0x02;
78 break;
79 case 4:
80 channel_allocation = 0x06;
81 break;
82 case 5:
83 channel_allocation = 0x0A;
84 break;
85 case 6:
86 channel_allocation = 0x0B;
87 break;
88 case 7:
89 channel_allocation = 0x12;
90 break;
91 case 8:
92 channel_allocation = 0x13;
93 break;
94 default:
95 return -EINVAL;
96 }
97
98 return channel_allocation;
99 }
100 EXPORT_SYMBOL_GPL(q6dsp_get_channel_allocation);
101
102 MODULE_DESCRIPTION("ASoC MSM QDSP6 helper functions");
103 MODULE_LICENSE("GPL v2");
104
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