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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.
// Copyright (c) 2018, Linaro Limited
#include "q6dsp-common.h"
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/errno.h>
int q6dsp_map_channels(u8 ch_map[PCM_MAX_NUM_CHANNEL], int ch)
{
memset(ch_map, 0, PCM_MAX_NUM_CHANNEL);
switch (ch) {
case 1:
ch_map[0] = PCM_CHANNEL_FC;
break;
case 2:
ch_map[0] = PCM_CHANNEL_FL;
ch_map[1] = PCM_CHANNEL_FR;
break;
case 3:
ch_map[0] = PCM_CHANNEL_FL;
ch_map[1] = PCM_CHANNEL_FR;
ch_map[2] = PCM_CHANNEL_FC;
break;
case 4:
ch_map[0] = PCM_CHANNEL_FL;
ch_map[1] = PCM_CHANNEL_FR;
ch_map[2] = PCM_CHANNEL_LS;
ch_map[3] = PCM_CHANNEL_RS;
break;
case 5:
ch_map[0] = PCM_CHANNEL_FL;
ch_map[1] = PCM_CHANNEL_FR;
ch_map[2] = PCM_CHANNEL_FC;
ch_map[3] = PCM_CHANNEL_LS;
ch_map[4] = PCM_CHANNEL_RS;
break;
case 6:
ch_map[0] = PCM_CHANNEL_FL;
ch_map[1] = PCM_CHANNEL_FR;
ch_map[2] = PCM_CHANNEL_LFE;
ch_map[3] = PCM_CHANNEL_FC;
ch_map[4] = PCM_CHANNEL_LS;
ch_map[5] = PCM_CHANNEL_RS;
break;
case 8:
ch_map[0] = PCM_CHANNEL_FL;
ch_map[1] = PCM_CHANNEL_FR;
ch_map[2] = PCM_CHANNEL_LFE;
ch_map[3] = PCM_CHANNEL_FC;
ch_map[4] = PCM_CHANNEL_LS;
ch_map[5] = PCM_CHANNEL_RS;
ch_map[6] = PCM_CHANNEL_LB;
ch_map[7] = PCM_CHANNEL_RB;
break;
default:
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL_GPL(q6dsp_map_channels);
int q6dsp_get_channel_allocation(int channels)
{
int channel_allocation;
/* HDMI spec CEA-861-E: Table 28 Audio InfoFrame Data Byte 4 */
switch (channels) {
case 2:
channel_allocation = 0;
break;
case 3:
channel_allocation = 0x02;
break;
case 4:
channel_allocation = 0x06;
break;
case 5:
channel_allocation = 0x0A;
break;
case 6:
channel_allocation = 0x0B;
break;
case 7:
channel_allocation = 0x12;
break;
case 8:
channel_allocation = 0x13;
break;
default:
return -EINVAL;
}
return channel_allocation;
}
EXPORT_SYMBOL_GPL(q6dsp_get_channel_allocation);
MODULE_LICENSE("GPL v2");
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