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Message-ID: <74b4f6d1-f5ae-5704-9728-790dfb1c4b33@codeaurora.org>
Date: Wed, 9 Jun 2021 18:55:47 +0530
From: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
To: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
broonie@...nel.org, robh+dt@...nel.org, plai@...eaurora.org,
bgoswami@...eaurora.org, perex@...ex.cz, tiwai@...e.com,
rohitkr@...eaurora.org, linux-arm-msm@...r.kernel.org,
alsa-devel@...a-project.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, swboyd@...omium.org,
judyhsiao@...omium.org
Subject: Re: [PATCH v2] ASoC: qcom: Add four speaker support on MI2S secondary
Hi Srini,
Thanks for your Time!!!
On 6/9/2021 1:40 PM, Srinivas Kandagatla wrote:
>
>
> On 09/06/2021 08:13, Srinivasa Rao Mandadapu wrote:
>> Add four speaker support on MI2S secondary block
>> by using I2S SD1 line on gpio52 pin, and add channel map
>> control support in the lpass-cpu audio driver.
>>
>> Signed-off-by: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
>> ---
>> Changes Since V1:
>> -- removed set_channel_map/get_channel_map implementation as
>> default kcontrols
>> added in pcm_new API.
>>
>> sound/soc/qcom/lpass-cpu.c | 32 ++++++++++++++++++++++++++++++++
>> sound/soc/qcom/lpass-sc7180.c | 1 +
>> sound/soc/qcom/lpass.h | 2 ++
>> 3 files changed, 35 insertions(+)
>>
>> diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
>> index c62d2612e8f5..15d69e311b38 100644
>> --- a/sound/soc/qcom/lpass-cpu.c
>> +++ b/sound/soc/qcom/lpass-cpu.c
>> @@ -29,6 +29,14 @@
>> #define LPASS_CPU_I2S_SD0_1_2_MASK GENMASK(2, 0)
>> #define LPASS_CPU_I2S_SD0_1_2_3_MASK GENMASK(3, 0)
>> +/*
>> + * Channel maps for Quad channel playbacks on MI2S Secondary
>> + */
>> +static struct snd_pcm_chmap_elem lpass_quad_chmaps = {
>> + .channels = 4,
>> + .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_RL,
>> + SNDRV_CHMAP_FR, SNDRV_CHMAP_RR }
>
> AFAIU, You would need an empty entry at the end of this list if not we
> will endup in a dereferencing memory sitting right next to this array
> which will lead to random memory corruptions...
>
> Have a look at some of the examples in existing codec drivers.
>
> Other than that patch looks good.
>
> --srini
Okay. Will change accordingly.
>
>
>> +};
>> static int lpass_cpu_init_i2sctl_bitfields(struct device *dev,
>> struct lpaif_i2sctl *i2sctl, struct regmap *map)
>> {
>> @@ -324,6 +332,25 @@ const struct snd_soc_dai_ops
>> asoc_qcom_lpass_cpu_dai_ops = {
>> };
>> EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_ops);
>> +int lpass_cpu_pcm_new(struct snd_soc_pcm_runtime *rtd,
>> + struct snd_soc_dai *dai)
>> +{
>> + int ret;
>> + struct snd_soc_dai_driver *drv = dai->driver;
>> + struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
>> +
>> + if (drvdata->mi2s_playback_sd_mode[dai->id] ==
>> LPAIF_I2SCTL_MODE_QUAD01) {
>> + ret = snd_pcm_add_chmap_ctls(rtd->pcm,
>> SNDRV_PCM_STREAM_PLAYBACK,
>> + &lpass_quad_chmaps, drv->playback.channels_max, 0,
>> + NULL);
>> + if (ret < 0)
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(lpass_cpu_pcm_new);
>> +
>> int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai)
>> {
>> struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
>> @@ -856,6 +883,11 @@ int asoc_qcom_lpass_cpu_platform_probe(struct
>> platform_device *pdev)
>> PTR_ERR(drvdata->mi2s_bit_clk[dai_id]));
>> return PTR_ERR(drvdata->mi2s_bit_clk[dai_id]);
>> }
>> + if (drvdata->mi2s_playback_sd_mode[dai_id] ==
>> + LPAIF_I2SCTL_MODE_QUAD01) {
>> + variant->dai_driver[dai_id].playback.channels_min = 4;
>> + variant->dai_driver[dai_id].playback.channels_max = 4;
>> + }
>> }
>> /* Allocation for i2sctl regmap fields */
>> diff --git a/sound/soc/qcom/lpass-sc7180.c
>> b/sound/soc/qcom/lpass-sc7180.c
>> index 8c168d3c589e..77a556b27cf0 100644
>> --- a/sound/soc/qcom/lpass-sc7180.c
>> +++ b/sound/soc/qcom/lpass-sc7180.c
>> @@ -58,6 +58,7 @@ static struct snd_soc_dai_driver
>> sc7180_lpass_cpu_dai_driver[] = {
>> },
>> .probe = &asoc_qcom_lpass_cpu_dai_probe,
>> .ops = &asoc_qcom_lpass_cpu_dai_ops,
>> + .pcm_new = lpass_cpu_pcm_new,
>> }, {
>> .id = LPASS_DP_RX,
>> .name = "Hdmi",
>> diff --git a/sound/soc/qcom/lpass.h b/sound/soc/qcom/lpass.h
>> index 83b2e08ade06..623ddccdafff 100644
>> --- a/sound/soc/qcom/lpass.h
>> +++ b/sound/soc/qcom/lpass.h
>> @@ -259,5 +259,7 @@ void asoc_qcom_lpass_cpu_platform_shutdown(struct
>> platform_device *pdev);
>> int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev);
>> int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai);
>> extern const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops;
>> +int lpass_cpu_pcm_new(struct snd_soc_pcm_runtime *rtd,
>> + struct snd_soc_dai *dai);
>> #endif /* __LPASS_H__ */
>>
--
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