Unverified Commit 4edc9859 authored by Chancel Liu's avatar Chancel Liu Committed by Mark Brown
Browse files

ASoC: fsl_sai: Add sample rate constraint 



Platforms like i.MX93/91 only have one audio PLL. Some sample rates are
not supported. If the PLL source is used for 8kHz series rates, then
11kHz series rates can't be supported. Use fsl_asoc_constrain_rates()
to constrain rates according to PLL sources.

Signed-off-by: default avatarChancel Liu <chancel.liu@nxp.com>
Link: https://patch.msgid.link/20241126115440.3929061-5-chancel.liu@nxp.com


Acked-by: default avatarShengjiu Wang <shengjiu.wang@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent b622b677

sound/soc/fsl/fsl_sai.c

+6 −1
Original line number Diff line number Diff line
@@ -885,7 +885,7 @@ static int fsl_sai_startup(struct snd_pcm_substream *substream, 
					   sai->dma_params_rx.maxburst);



	ret = snd_pcm_hw_constraint_list(substream->runtime, 0,

			SNDRV_PCM_HW_PARAM_RATE, &fsl_sai_rate_constraints);

					 SNDRV_PCM_HW_PARAM_RATE, &sai->constraint_rates);



	return ret;

}
@@ -1442,6 +1442,11 @@ static int fsl_sai_probe(struct platform_device *pdev) 
	fsl_asoc_get_pll_clocks(&pdev->dev, &sai->pll8k_clk,

				&sai->pll11k_clk);



	fsl_asoc_constrain_rates(&sai->constraint_rates,

				 &fsl_sai_rate_constraints,

				 sai->pll8k_clk, sai->pll11k_clk, NULL,

				 sai->constraint_rates_list);



	/* Use Multi FIFO mode depending on the support from SDMA script */

	ret = of_property_read_u32_array(np, "dmas", dmas, 4);

	if (!sai->soc_data->use_edma && !ret && dmas[2] == IMX_DMATYPE_MULTI_SAI)

sound/soc/fsl/fsl_sai.h

+3 −0
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ 
#include <linux/dma/imx-dma.h>

#include <sound/dmaengine_pcm.h>



#define FAL_SAI_NUM_RATES  20

#define FSL_SAI_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\

			 SNDRV_PCM_FMTBIT_S20_3LE |\

			 SNDRV_PCM_FMTBIT_S24_LE |\
@@ -309,6 +310,8 @@ struct fsl_sai { 
	struct pinctrl *pinctrl;

	struct pinctrl_state *pins_state;

	struct sdma_peripheral_config audio_config[2];

	struct snd_pcm_hw_constraint_list constraint_rates;

	unsigned int constraint_rates_list[FAL_SAI_NUM_RATES];

};



#define TX 1