openwrt/target/linux/layerscape/patches-5.4/801-audio-0035-MLK-16929-1-ASoC-fsl_sai-add-bitclk_freq.patch

From d40566a2e9aa3c40be313b1fba9d5435c58ffd79 Mon Sep 17 00:00:00 2001
From: Shengjiu Wang <shengjiu.wang@nxp.com>
Date: Thu, 23 Nov 2017 13:32:13 +0800
Subject: [PATCH] MLK-16929-1: ASoC: fsl_sai: add bitclk_freq

Allow set SAI bit clock frequency trough snd_soc_dai_set_sysclk
function call on machine sound drivers.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Signed-off-by: Adrian Alonso <adrian.alonso@nxp.com>
---
 sound/soc/fsl/fsl_sai.c | 9 ++++++++-
 sound/soc/fsl/fsl_sai.h | 1 +
 2 files changed, 9 insertions(+), 1 deletion(-)

--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -233,11 +233,14 @@ static int fsl_sai_set_dai_sysclk_tr(str
 static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
 		int clk_id, unsigned int freq, int dir)
 {
+	struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
 	int ret;
 
 	if (dir == SND_SOC_CLOCK_IN)
 		return 0;
 
+	sai->bitclk_freq = freq;
+
 	ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq,
 					FSL_FMT_TRANSMITTER);
 	if (ret) {
@@ -499,7 +502,11 @@ static int fsl_sai_hw_params(struct snd_
 		slot_width = sai->slot_width;
 
 	if (!sai->slave_mode[tx]) {
-		ret = fsl_sai_set_bclk(cpu_dai, tx,
+		if (sai->bitclk_freq)
+			ret = fsl_sai_set_bclk(cpu_dai, tx,
+					sai->bitclk_freq);
+		else
+			ret = fsl_sai_set_bclk(cpu_dai, tx,
 				slots * slot_width * params_rate(params));
 		if (ret)
 			return ret;
--- a/sound/soc/fsl/fsl_sai.h
+++ b/sound/soc/fsl/fsl_sai.h
@@ -181,6 +181,7 @@ struct fsl_sai {
 	unsigned int mclk_streams;
 	unsigned int slots;
 	unsigned int slot_width;
+	unsigned int bitclk_freq;
 
 	struct snd_soc_dai_driver cpu_dai_drv;
 	struct snd_dmaengine_dai_dma_data dma_params_rx;