linux-kernel - [PATCH 02/14] ASoC: qcom: SC7280: audioreach: Add sc7280 hardware param fixup callback

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Date:   Wed, 1 Feb 2023 19:19:35 +0530
From:   Mohammad Rafi Shaik <quic_mohs@...cinc.com>
To:     <krzysztof.kozlowski+dt@...aro.org>, <agross@...nel.org>,
        <andersson@...nel.org>, <lgirdwood@...il.com>,
        <broonie@...nel.org>, <robh+dt@...nel.org>,
        <quic_plai@...cinc.com>, <bgoswami@...cinc.com>,
        <srinivas.kandagatla@...aro.org>, <quic_rohkumar@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <alsa-devel@...a-project.org>,
        <linux-kernel@...r.kernel.org>, <swboyd@...omium.org>,
        <judyhsiao@...omium.org>, <devicetree@...r.kernel.org>,
        <konrad.dybcio@...aro.org>
CC:     Mohammad Rafi Shaik <quic_mohs@...cinc.com>
Subject: [PATCH 02/14] ASoC: qcom: SC7280: audioreach: Add sc7280 hardware param fixup callback

Add support to set backend params such as sampling rate and
number of channels using backend params fixup callback.
Also remove hardware params constraints setting.

Signed-off-by: Mohammad Rafi Shaik <quic_mohs@...cinc.com>
Co-developed-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 sound/soc/qcom/sc7280.c | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/sound/soc/qcom/sc7280.c b/sound/soc/qcom/sc7280.c
index da7469a6a267..aaa95fe63d83 100644
--- a/sound/soc/qcom/sc7280.c
+++ b/sound/soc/qcom/sc7280.c
@@ -14,6 +14,7 @@
 #include <sound/soc.h>
 #include <sound/rt5682s.h>
 #include <linux/soundwire/sdw.h>
+#include <sound/pcm_params.h>
 
 #include "../codecs/rt5682.h"
 #include "../codecs/rt5682s.h"
@@ -24,6 +25,7 @@
 #define DEFAULT_MCLK_RATE              19200000
 #define RT5682_PLL_FREQ (48000 * 512)
 #define MI2S_BCLK_RATE		1536000
+#define DEFAULT_SAMPLE_RATE_48K	48000
 
 struct sc7280_snd_data {
 	struct snd_soc_card card;
@@ -188,7 +190,6 @@ static int sc7280_init(struct snd_soc_pcm_runtime *rtd)
 static int sc7280_snd_hw_params(struct snd_pcm_substream *substream,
 				struct snd_pcm_hw_params *params)
 {
-	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_dai *codec_dai;
 	const struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
@@ -196,8 +197,6 @@ static int sc7280_snd_hw_params(struct snd_pcm_substream *substream,
 	struct sdw_stream_runtime *sruntime;
 	int i;
 
-	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2, 2);
-	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 48000, 48000);
 
 	switch (cpu_dai->id) {
 	case LPASS_CDC_DMA_TX3:
@@ -358,6 +357,20 @@ static const struct snd_soc_dapm_widget sc7280_snd_widgets[] = {
 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
 };
 
+static int sc7280_snd_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+					 struct snd_pcm_hw_params *params)
+{
+	struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+	struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+
+	rate->min = rate->max = DEFAULT_SAMPLE_RATE_48K;
+	channels->min = channels->max = 2;
+	snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
+
+	return 0;
+}
+
 static int sc7280_snd_platform_probe(struct platform_device *pdev)
 {
 	struct snd_soc_card *card;
@@ -387,6 +400,8 @@ static int sc7280_snd_platform_probe(struct platform_device *pdev)
 	for_each_card_prelinks(card, i, link) {
 		link->init = sc7280_init;
 		link->ops = &sc7280_ops;
+		if (link->no_pcm == 1)
+			link->be_hw_params_fixup = sc7280_snd_be_hw_params_fixup;
 	}
 
 	return devm_snd_soc_register_card(dev, card);
-- 
2.25.1