Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/sound/soc/qcom/qdsp6/q6dsp-common.c
26444 views
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


105