Re: [PATCH v2] ASoC: qcom: audioreach: support multichannel PCM formats

[Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>]

On 10/26/26 8:25 AM, Zhangfei Gao wrote:
> AudioReach currently rejects PCM streams with more than four channels in
> the PCM and shared-memory media format paths.
bit more context would help, why you need it now?

> 
> Reuse q6dsp_map_channels() to support multichannel PCM formats.
> 
> Signed-off-by: Zhangfei Gao <zhangfei.gao@oss.qualcomm.com>
> ---
> 
> v2: reuse q6dsp_map_channels
> 
>  sound/soc/qcom/qdsp6/audioreach.c       | 26 -------------------------
>  sound/soc/qcom/qdsp6/audioreach.h       |  1 -
>  sound/soc/qcom/qdsp6/q6apm-dai.c        | 12 +++++++++---
>  sound/soc/qcom/qdsp6/q6apm-lpass-dais.c |  9 +++++++--
>  4 files changed, 16 insertions(+), 32 deletions(-)
> 
> diff --git a/sound/soc/qcom/qdsp6/audioreach.c b/sound/soc/qcom/qdsp6/audioreach.c
> index d2dc5d37bccf..33161523c7da 100644
> --- a/sound/soc/qcom/qdsp6/audioreach.c
> +++ b/sound/soc/qcom/qdsp6/audioreach.c
> @@ -306,22 +306,6 @@ void *audioreach_alloc_apm_cmd_pkt(int pkt_size, uint32_t opcode, uint32_t token
>  }
>  EXPORT_SYMBOL_GPL(audioreach_alloc_apm_cmd_pkt);
>  
> -void audioreach_set_default_channel_mapping(u8 *ch_map, int num_channels)
> -{
> -	if (num_channels == 1) {
> -		ch_map[0] =  PCM_CHANNEL_FL;
> -	} else if (num_channels == 2) {
> -		ch_map[0] =  PCM_CHANNEL_FL;
> -		ch_map[1] =  PCM_CHANNEL_FR;
> -	} else if (num_channels == 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;
> -	}
> -}
> -EXPORT_SYMBOL_GPL(audioreach_set_default_channel_mapping);
> -
while you at this, please remove AR_PCM_MAX_NUM_CHANNEL too.

Other than that it looks good to me.


Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>

--srini
>  static void apm_populate_container_config(struct apm_container_obj *cfg,
>  					  const struct audioreach_container *cont)
>  {
> @@ -1185,11 +1169,6 @@ static int audioreach_pcm_set_media_format(struct q6apm_graph *graph,
>  	int payload_size;
>  	int i, j;
>  
> -	if (num_channels > 4) {
> -		dev_err(graph->dev, "Error: Invalid channels (%d)!\n", num_channels);
> -		return -EINVAL;
> -	}
> -
>  	payload_size = APM_PCM_MODULE_FMT_CMD_PSIZE(num_channels);
>  
>  	struct gpr_pkt *pkt __free(kfree) =
> @@ -1275,11 +1254,6 @@ static int audioreach_shmem_set_media_format(struct q6apm_graph *graph,
>  	int i, j;
>  	void *p;
>  
> -	if (num_channels > 4) {
> -		dev_err(graph->dev, "Error: Invalid channels (%d)!\n", num_channels);
> -		return -EINVAL;
> -	}
> -
>  	payload_size = APM_SHMEM_FMT_CFG_PSIZE(num_channels) + APM_MODULE_PARAM_DATA_SIZE;
>  
>  	struct gpr_pkt *pkt __free(kfree) =
> diff --git a/sound/soc/qcom/qdsp6/audioreach.h b/sound/soc/qcom/qdsp6/audioreach.h
> index 587f14ce71d2..495072da070b 100644
> --- a/sound/soc/qcom/qdsp6/audioreach.h
> +++ b/sound/soc/qcom/qdsp6/audioreach.h
> @@ -1009,7 +1009,6 @@ static inline u16 audioreach_gpr_dest_domain(gpr_device_t *gdev)
>  
>  void *audioreach_alloc_apm_cmd_pkt(int pkt_size, uint32_t opcode,
>  				   uint32_t token);
> -void audioreach_set_default_channel_mapping(u8 *ch_map, int num_channels);
>  void *audioreach_alloc_cmd_pkt(int payload_size, uint32_t opcode,
>  			       uint32_t token, uint32_t src_port,
>  			       uint32_t dest_port);
> diff --git a/sound/soc/qcom/qdsp6/q6apm-dai.c b/sound/soc/qcom/qdsp6/q6apm-dai.c
> index 58beaf906b9f..83594b693569 100644
> --- a/sound/soc/qcom/qdsp6/q6apm-dai.c
> +++ b/sound/soc/qcom/qdsp6/q6apm-dai.c
> @@ -21,6 +21,7 @@
>  #include <asm/div64.h>
>  #include <asm/dma.h>
>  #include "q6apm.h"
> +#include "q6dsp-common.h"
>  
>  #define DRV_NAME "q6apm-dai"
>  #define POS_BUFFER_BYTES	4096
> @@ -344,7 +345,10 @@ static int q6apm_dai_prepare(struct snd_soc_component *component,
>  	cfg.num_channels = runtime->channels;
>  	cfg.bit_width = prtd->bits_per_sample;
>  	cfg.fmt = SND_AUDIOCODEC_PCM;
> -	audioreach_set_default_channel_mapping(cfg.channel_map, runtime->channels);
> +	ret = q6dsp_map_channels(cfg.channel_map, runtime->channels);
> +	if (ret)
> +		return ret;
> +
>  	if (prtd->state) {
>  		/* clear the previous setup if any  */
>  		q6apm_graph_stop(prtd->graph);
> @@ -1007,8 +1011,10 @@ static int q6apm_dai_compr_set_params(struct snd_soc_component *component,
>  		cfg.num_channels = 2;
>  		cfg.bit_width = prtd->bits_per_sample;
>  		cfg.fmt = codec->id;
> -		audioreach_set_default_channel_mapping(cfg.channel_map,
> -						       cfg.num_channels);
> +		ret = q6dsp_map_channels(cfg.channel_map, cfg.num_channels);
> +		if (ret)
> +			return ret;
> +
>  		memcpy(&cfg.codec, codec, sizeof(*codec));
>  
>  		ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg);
> diff --git a/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c b/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
> index 83f2711bceea..fcc0267d3657 100644
> --- a/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
> +++ b/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
> @@ -147,7 +147,9 @@ static int q6hdmi_hw_params(struct snd_pcm_substream *substream,
>  	cfg->bit_width = params_width(params);
>  	cfg->sample_rate = params_rate(params);
>  	cfg->num_channels = channels;
> -	audioreach_set_default_channel_mapping(cfg->channel_map, channels);
> +	ret = q6dsp_map_channels(cfg->channel_map, channels);
> +	if (ret)
> +		return ret;
>  
>  	switch (dai->id) {
>  	case DISPLAY_PORT_RX_0:
> @@ -173,11 +175,14 @@ static int q6dma_hw_params(struct snd_pcm_substream *substream,
>  	struct q6apm_lpass_dai_data *dai_data = dev_get_drvdata(dai->dev);
>  	struct audioreach_module_config *cfg = &dai_data->module_config[dai->id];
>  	int channels = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max;
> +	int ret;
>  
>  	cfg->bit_width = params_width(params);
>  	cfg->sample_rate = params_rate(params);
>  	cfg->num_channels = channels;
> -	audioreach_set_default_channel_mapping(cfg->channel_map, channels);
> +	ret = q6dsp_map_channels(cfg->channel_map, channels);
> +	if (ret)
> +		return ret;
>  
>  	return 0;
>  }