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 add no pcm check for hardware params constraints setting.
Signed-off-by: Mohammad Rafi Shaik <quic_mohs@quicinc.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230619101653.9750-2-srinivas.kandagatla@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

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"
@@ -196,8 +197,10 @@ 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);
+	if (!rtd->dai_link->no_pcm) {
+		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 +361,20 @@ 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 = 48000;
+	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 +404,8 @@ 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);