diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/qcom/qdsp6/q6dsp-common.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/sound/soc/qcom/qdsp6/q6dsp-common.c b/sound/soc/qcom/qdsp6/q6dsp-common.c new file mode 100644 index 0000000000..95585dea2b --- /dev/null +++ b/sound/soc/qcom/qdsp6/q6dsp-common.c @@ -0,0 +1,101 @@ +// 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"); |