openwrt/target/linux/layerscape/patches-5.4/801-audio-0055-MLK-18898-1-ASoC-fsl_sai-select-pinctrl-state-as-fun.patch

From 001937cc21a05165530c0775c4646bd04e797658 Mon Sep 17 00:00:00 2001
From: Viorel Suman <viorel.suman@nxp.com>
Date: Mon, 27 Aug 2018 13:50:17 +0300
Subject: [PATCH] MLK-18898-1: ASoC: fsl_sai: select pinctrl state as function
 of bitclock rate

Similar to DSD512 case we need a PCM pinctrl state option to map SAI BCLK
to codec MCLK pin. Given that bitclock rate is function of slots number and
slot width - pass bclk rate as parameter value from SAI driver.

Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
(cherry picked from commit 826caeae32713cff7ad50de8ebc9915de975edd9)
---
 sound/soc/fsl/fsl_dsd.h | 15 +++++++--------
 sound/soc/fsl/fsl_sai.c | 24 ++++++++++--------------
 2 files changed, 17 insertions(+), 22 deletions(-)

--- a/sound/soc/fsl/fsl_dsd.h
+++ b/sound/soc/fsl/fsl_dsd.h
@@ -30,23 +30,22 @@ static bool fsl_is_dsd(struct snd_pcm_hw
 }
 
 static struct pinctrl_state *fsl_get_pins_state(struct pinctrl *pinctrl,
-	struct snd_pcm_hw_params *params)
+	struct snd_pcm_hw_params *params, u32 bclk)
 {
-	int dsd_bclk;
 	struct pinctrl_state *state = 0;
 
 	if (fsl_is_dsd(params)) {
-		dsd_bclk = params_rate(params) * params_physical_width(params);
-
-		switch (dsd_bclk) {
-		case 22579200: /* DSD512 */
+		/* DSD512@44.1kHz, DSD512@48kHz */
+		if (bclk >= 22579200)
 			state = pinctrl_lookup_state(pinctrl, "dsd512");
-			break;
-		}
 
 		/* Get default DSD state */
 		if (IS_ERR_OR_NULL(state))
 			state = pinctrl_lookup_state(pinctrl, "dsd");
+	} else {
+		/* 706k32b2c, 768k32b2c, etc */
+		if (bclk >= 45158400)
+			state = pinctrl_lookup_state(pinctrl, "pcm_b2m");
 	}
 
 	/* Get default state */
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -620,7 +620,7 @@ static int fsl_sai_hw_params(struct snd_
 	u32 val_cr4 = 0, val_cr5 = 0;
 	u32 slots = (channels == 1) ? 2 : channels;
 	u32 slot_width = word_width;
-	u32 pins;
+	u32 pins, bclk;
 	int ret;
 	int i;
 	int trce_mask = 0;
@@ -630,9 +630,16 @@ static int fsl_sai_hw_params(struct snd_
 
 	pins = DIV_ROUND_UP(channels, slots);
 	sai->is_dsd = fsl_is_dsd(params);
+	if (sai->is_dsd)
+		pins = channels;
+
+	if (sai->slot_width)
+		slot_width = sai->slot_width;
+
+	bclk = rate*(sai->bitclk_ratio ? sai->bitclk_ratio : slots * slot_width);
 
 	if (!IS_ERR_OR_NULL(sai->pinctrl)) {
-		sai->pins_state = fsl_get_pins_state(sai->pinctrl, params);
+		sai->pins_state = fsl_get_pins_state(sai->pinctrl, params, bclk);
 
 		if (!IS_ERR_OR_NULL(sai->pins_state)) {
 			ret = pinctrl_select_state(sai->pinctrl, sai->pins_state);
@@ -644,19 +651,8 @@ static int fsl_sai_hw_params(struct snd_
 		}
 	}
 
-	if (sai->is_dsd)
-		pins = channels;
-
-	if (sai->slot_width)
-		slot_width = sai->slot_width;
-
 	if (!sai->slave_mode[tx]) {
-		if (sai->bitclk_ratio)
-			ret = fsl_sai_set_bclk(cpu_dai, tx,
-					rate * sai->bitclk_ratio);
-		else
-			ret = fsl_sai_set_bclk(cpu_dai, tx,
-					rate * slots * slot_width);
+		ret = fsl_sai_set_bclk(cpu_dai, tx, bclk);
 		if (ret)
 			return ret;