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SubjectRe: [RESEND PATCH v2 10/15] ASoC: qcom: qdsp6: Add support to q6routing driver
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On 02/01/18 23:00, Bjorn Andersson wrote:
> On Thu 14 Dec 09:33 PST 2017, srinivas.kandagatla@linaro.org wrote:
>
>> From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
>>
>> This patch adds support to q6 routing driver which configures route
>> between ASM and AFE module using ADM apis.
>>
>> This driver uses dapm widgets to setup the matrix between AFE ports and
>> ASM streams.
>>
>
> Why is this a separate driver from the q6adm?

This is actually exposing the mixer controls for routing streams on to
different audio sink/sources using a matrix.

>
>> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
>> ---
>> sound/soc/qcom/Kconfig | 5 +
>> sound/soc/qcom/qdsp6/Makefile | 1 +
>> sound/soc/qcom/qdsp6/q6routing.c | 386 +++++++++++++++++++++++++++++++++++++++
>> sound/soc/qcom/qdsp6/q6routing.h | 9 +
>> 4 files changed, 401 insertions(+)
>> create mode 100644 sound/soc/qcom/qdsp6/q6routing.c
>> create mode 100644 sound/soc/qcom/qdsp6/q6routing.h

>> diff --git a/sound/soc/qcom/qdsp6/q6routing.c b/sound/soc/qcom/qdsp6/q6routing.c


>> +/**
>> + * q6routing_reg_phy_stream() - Register a new stream for route setup
>> + *
>> + * @fedai_id: Frontend dai id.
>> + * @perf_mode: Performace mode.
>
> "Performance"
yep.

>
>> + * @stream_id: ASM stream id to map.
>> + * @stream_type: Direction of stream
>> + *
>> + * Return: Will be an negative on error or a zero on success.
>> + */
>> +int q6routing_reg_phy_stream(int fedai_id, int perf_mode,
>
> q6routing_stream_open() ?

sure if it helps reading.

>
>> + int stream_id, int stream_type)
>> +{
>> + int j, topology, num_copps = 0;
>> + struct route_payload payload;
>> + int copp_idx;
>> + struct session_data *session;
>> +
>> + if (!routing_data) {
>> + pr_err("Routing driver not yet ready\n");
>> + return -EINVAL;
>> + }
>> +
>> + session = &routing_data->sessions[stream_id - 1];
>> + mutex_lock(&routing_data->lock);
>> + session->fedai_id = fedai_id;
>> + payload.num_copps = 0; /* only RX needs to use payload */
>> + topology = NULL_COPP_TOPOLOGY;
>> + copp_idx = q6adm_open(routing_data->dev, session->port_id,
>> + session->path_type, session->sample_rate,
>> + session->channels, topology, perf_mode,
>> + session->bits_per_sample, 0, 0);
>> + if ((copp_idx < 0) || (copp_idx >= MAX_COPPS_PER_PORT)) {
>
> Make q6adm_open() not return >= MAX_COPPS_PER_PORT.
>
> And drop the extra parenthesis.
>
>> + mutex_unlock(&routing_data->lock);
>> + return -EINVAL;
>> + }
>> +
>> + set_bit(copp_idx, &session->copp_map);
>> + for (j = 0; j < MAX_COPPS_PER_PORT; j++) {
>
> Use for_each_set_bit()
>
>> + unsigned long copp = session->copp_map;
>> +
>> + if (test_bit(j, &copp)) {
>> + payload.port_id[num_copps] = session->port_id;
>> + payload.copp_idx[num_copps] = j;
>> + num_copps++;
>> + }
>> + }
>> +
>> + if (num_copps) {
>> + payload.num_copps = num_copps;
>> + payload.session_id = stream_id;
>> + q6adm_matrix_map(routing_data->dev, session->path_type,
>> + payload, perf_mode);
>> + }
>> + mutex_unlock(&routing_data->lock);
>> +
>> + return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(q6routing_reg_phy_stream);
>> +
>> +static struct session_data *routing_get_session(struct msm_routing_data *data,
>> + int port_id, int port_type)
>
> port_type is ignored

It will be used once we add capture support.

>
>> +{
>> + int i;
>> +
>> + for (i = 0; i < MAX_SESSIONS; i++)
>> + if (port_id == data->sessions[i].port_id)
>> + return &data->sessions[i];
>> +
>> + return NULL;
>> +}
>> +

>> +/**
>> + * q6routing_dereg_phy_stream() - Deregister a stream
>> + *
>> + * @fedai_id: Frontend dai id.
>> + * @stream_type: Direction of stream
>> + *
>> + * Return: Will be an negative on error or a zero on success.
>> + */
>> +void q6routing_dereg_phy_stream(int fedai_id, int stream_type)
>
> q6routing_stream_close()?
>
will rename it.
>> +{
>> + struct session_data *session;
>> + int idx;
>> +
>> + session = get_session_from_id(routing_data, fedai_id);
>> + if (!session)
>> + return;
>> +
>> + for_each_set_bit(idx, &session->copp_map, MAX_COPPS_PER_PORT)
>> + q6adm_close(routing_data->dev, session->port_id,
>> + session->perf_mode, idx);
>> +
>> + session->fedai_id = -1;
>> + session->copp_map = 0;
>> +}
>> +EXPORT_SYMBOL_GPL(q6routing_dereg_phy_stream);
>> +

>> +


>> +
>> +static const struct snd_soc_dapm_widget msm_qdsp6_widgets[] = {
>> + /* Frontend AIF */
>> + /* Widget name equals to Front-End DAI name<Need confirmation>,
>
> Perhaps this should be confirmed and the comment updated?
>

Some leftover from old code...

>> + * Stream name must contains substring of front-end dai name
>> + */
>> + SND_SOC_DAPM_AIF_IN("MM_DL1", "MultiMedia1 Playback", 0, 0, 0, 0),
>> + SND_SOC_DAPM_AIF_IN("MM_DL2", "MultiMedia2 Playback", 0, 0, 0, 0),
>> + SND_SOC_DAPM_AIF_IN("MM_DL3", "MultiMedia3 Playback", 0, 0, 0, 0),
>> + SND_SOC_DAPM_AIF_IN("MM_DL4", "MultiMedia4 Playback", 0, 0, 0, 0),
>> + SND_SOC_DAPM_AIF_IN("MM_DL5", "MultiMedia5 Playback", 0, 0, 0, 0),
>> + SND_SOC_DAPM_AIF_IN("MM_DL6", "MultiMedia6 Playback", 0, 0, 0, 0),
>> + SND_SOC_DAPM_AIF_IN("MM_DL7", "MultiMedia7 Playback", 0, 0, 0, 0),
>> + SND_SOC_DAPM_AIF_IN("MM_DL8", "MultiMedia8 Playback", 0, 0, 0, 0),
>> +
>> + /* Mixer definitions */
>> + SND_SOC_DAPM_MIXER("HDMI Mixer", SND_SOC_NOPM, 0, 0,
>> + hdmi_mixer_controls,
>> + ARRAY_SIZE(hdmi_mixer_controls)),
>> +};
>
>> +static int routing_hw_params(struct snd_pcm_substream *substream,
>> + struct snd_pcm_hw_params *params)
>> +{
>> + struct snd_soc_pcm_runtime *rtd = substream->private_data;
>> + unsigned int be_id = rtd->cpu_dai->id;
>> + struct snd_soc_platform *platform = rtd->platform;
>> + struct msm_routing_data *data = snd_soc_platform_get_drvdata(platform);
>> + struct session_data *session;
>> + int port_id, port_type, path_type, bits_per_sample;
>
> bits_per_sample is likely unused.
>
yep.

>> +
>> + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
>> + path_type = ADM_PATH_PLAYBACK;
>> + port_type = MSM_AFE_PORT_TYPE_RX;
>> + }
>> +
>> + port_id = be_id;
>
> Why alias this variable?
will fix this in next version.

>
>> +
>> + session = routing_get_session(data, port_id, port_type);
>> +
>> + if (!session) {
>> + pr_err("No session matrix setup yet..\n");
>> + return -EINVAL;
>> + }
>> +
>> + mutex_lock(&data->lock);
>> +
>> + session->path_type = path_type;
>> + session->sample_rate = params_rate(params);
>> + session->channels = params_channels(params);
>> + session->format = params_format(params);
>> +
>> + if (session->format == SNDRV_PCM_FORMAT_S16_LE)
>> + session->bits_per_sample = 16;
>> + else if (session->format == SNDRV_PCM_FORMAT_S24_LE)
>> + bits_per_sample = 24;
>
> session-> ?

I agree, will fix it.

>
> Perhaps switch on params_format(params) instead? And fail in the default
> case.
will give that a go.

>
>> +
>> + mutex_unlock(&data->lock);
>> + return 0;
>> +}
>> +


>> +static struct snd_pcm_ops q6pcm_routing_ops = {
>> + .hw_params = routing_hw_params,
>> + .close = routing_close,
>> + .prepare = routing_prepare,
>> +};
>> +
>> +/* Not used but frame seems to require it */
>
> Remove comment?
>
looks like leftover.. will remove it.

[...]
>> +
>> +static int q6pcm_routing_remove(struct platform_device *pdev)
>> +{
>
> As you return here routing_data will be freed. The early check in
> q6routing_reg_phy_stream() seems to indicate that this driver can be
> called even though the routing device isn't available.
>
> So you probably want to clear that variable, at least.
sure, will fix this in next version.

>
>> + return 0;
>> +}
>> +
>> +static struct platform_driver q6pcm_routing_driver = {
>> + .driver = {
>> + .name = "q6routing",
>> + .owner = THIS_MODULE,
>
> Drop .owner
>
yep.
>> + },
>> + .probe = q6pcm_routing_probe,
>> + .remove = q6pcm_routing_remove,
>> +};

>>

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