asoc: ep92: add support for DSD input (fe3356fa) · Commits · e / devices / android_kernel_fairphone_FP5

asoc/codecs/ep92/ep92.c

+48 −2

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		/*
		* Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
		* Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
		*/

		#include <linux/init.h>
		@@ -40,6 +40,10 @@ static const unsigned int ep92_samp_freq_table[8] = {
		32000, 44100, 48000, 88200, 96000, 176400, 192000, 768000
		};

		static const unsigned int ep92_dsd_freq_table[4] = {
		64, 128, 256, 0
		};

		static bool ep92_volatile_register(struct device *dev, unsigned int reg)
		{
		/* do not cache register state in regmap */
		@@ -549,6 +553,23 @@ static void ep92_read_audio_info(struct snd_soc_component *component,
		send_uevent = true;
		}

		old = ep92->ai.system_status_1;
		ep92->ai.system_status_1 = snd_soc_read(codec,
		EP92_AUDIO_INFO_SYSTEM_STATUS_1);
		if (ep92->ai.system_status_1 == 0xff) {
		dev_dbg(codec->dev,
		"ep92 EP92_AUDIO_INFO_SYSTEM_STATUS_1 read 0xff\n");
		ep92->ai.system_status_1 = old;
		}
		change = ep92->ai.system_status_1 ^ old;
		if (change & EP92_AI_DSD_RATE_MASK) {
		dev_dbg(codec->dev, "ep92 dsd rate changed to %d\n",
		ep92_dsd_freq_table[(ep92->ai.system_status_1 &
		EP92_AI_DSD_RATE_MASK)
		>> EP92_AI_DSD_RATE_SHIFT]);
		send_uevent = true;
		}

		old = ep92->ai.audio_status;
		ep92->ai.audio_status = snd_soc_component_read32(component,
		EP92_AUDIO_INFO_AUDIO_STATUS);
		@@ -580,7 +601,9 @@ static void ep92_read_audio_info(struct snd_soc_component *component,
		}

		new_mode = ep92->old_mode;
		if (ep92->ai.audio_status & EP92_AI_STD_ADO_MASK) {
		if (ep92->ai.audio_status & EP92_AI_DSD_ADO_MASK)
		new_mode = 2; /* One bit audio */
		else if (ep92->ai.audio_status & EP92_AI_STD_ADO_MASK) {
		if (ep92->ai.cs[0] & EP92_AI_NPCM_MASK)
		new_mode = 1; /* Compr */
		else
		@@ -897,6 +920,27 @@ static ssize_t ep92_sysfs_rda_audio_format(struct device *dev,
		return ret;
		}

		static ssize_t ep92_sysfs_rda_dsd_rate(struct device *dev,
		struct device_attribute attr, char buf)
		{
		ssize_t ret = 0;
		int val;
		struct ep92_pdata *ep92 = dev_get_drvdata(dev);

		if (!ep92 \|\| !ep92->codec) {
		dev_err(dev, "%s: device error\n", __func__);
		return -ENODEV;
		}

		val = ep92_dsd_freq_table[(ep92->ai.system_status_1 &
		EP92_AI_DSD_RATE_MASK) >> EP92_AI_DSD_RATE_SHIFT];

		ret = snprintf(buf, EP92_SYSFS_ENTRY_MAX_LEN, "%d\n", val);
		dev_dbg(dev, "%s: '%d'\n", __func__, val);

		return ret;
		}

		static ssize_t ep92_sysfs_rda_audio_rate(struct device *dev,
		struct device_attribute attr, char buf)
		{
		@@ -1621,6 +1665,7 @@ static DEVICE_ATTR(cec_volume, 0644, ep92_sysfs_rda_cec_volume,
		static DEVICE_ATTR(runout, 0444, ep92_sysfs_rda_runout, NULL);
		static DEVICE_ATTR(force_inactive, 0644, ep92_sysfs_rda_force_inactive,
		ep92_sysfs_wta_force_inactive);
		static DEVICE_ATTR(dsd_rate, 0444, ep92_sysfs_rda_dsd_rate, NULL);

		static struct attribute *ep92_fs_attrs[] = {
		&dev_attr_chipid.attr,
		@@ -1647,6 +1692,7 @@ static struct attribute *ep92_fs_attrs[] = {
		&dev_attr_cec_volume.attr,
		&dev_attr_runout.attr,
		&dev_attr_force_inactive.attr,
		&dev_attr_dsd_rate.attr,
		NULL,
		};

asoc/codecs/ep92/ep92.h

+5 −1

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0-only */
		/*
		* Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
		* Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
		*/

		#ifndef __EP92_H__
		@@ -175,6 +175,10 @@ static struct reg_default ep92_reg_defaults[] = {
		#define EP92_AI_PREEMPH_MASK 0x38
		#define EP92_AI_CH_COUNT_MASK 0x07
		#define EP92_AI_CH_ALLOC_MASK 0xff
		#define EP92_AI_DSD_ADO_SHIFT 4
		#define EP92_AI_DSD_ADO_MASK 0x10
		#define EP92_AI_DSD_RATE_SHIFT 4
		#define EP92_AI_DSD_RATE_MASK 0x30

		#define EP92_2CHOICE_MASK 1
		#define EP92_GC_CEC_VOLUME_MIN 0