sound/soc/fsl/fsl_hdmi.c

/*
 * ALSA SoC HDMI Audio Layer for Freescale i.MX
 *
 * Copyright (C) 2011-2014 Freescale Semiconductor, Inc.
 *
 * Some code from patch_hdmi.c
 *  Copyright (c) 2008-2010 Intel Corporation. All rights reserved.
 *  Copyright (c) 2006 ATI Technologies Inc.
 *  Copyright (c) 2008 NVIDIA Corp.  All rights reserved.
 *  Copyright (c) 2008 Wei Ni <wni@nvidia.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/mfd/mxc-hdmi-core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/asoundef.h>
#include <sound/hdmi-codec.h>

#include <video/mxc_hdmi.h>

#include "imx-hdmi.h"


static struct mxc_edid_cfg edid_cfg;

static u32 playback_rates[HDMI_MAX_RATES];
static u32 playback_sample_size[HDMI_MAX_SAMPLE_SIZE];
static u32 playback_channels[HDMI_MAX_CHANNEL_CONSTRAINTS];

static struct snd_pcm_hw_constraint_list playback_constraint_rates;
static struct snd_pcm_hw_constraint_list playback_constraint_bits;
static struct snd_pcm_hw_constraint_list playback_constraint_channels;

#ifdef DEBUG
static void dumpregs(struct snd_soc_dai *dai)
{
	u32 n, cts;

	cts = (hdmi_readb(HDMI_AUD_CTS3) << 16) |
		(hdmi_readb(HDMI_AUD_CTS2) << 8) |
		hdmi_readb(HDMI_AUD_CTS1);

	n = (hdmi_readb(HDMI_AUD_N3) << 16) |
		(hdmi_readb(HDMI_AUD_N2) << 8) |
		hdmi_readb(HDMI_AUD_N1);

	dev_dbg(dai->dev, "HDMI_PHY_CONF0      0x%02x\n",
			hdmi_readb(HDMI_PHY_CONF0));
	dev_dbg(dai->dev, "HDMI_MC_CLKDIS      0x%02x\n",
			hdmi_readb(HDMI_MC_CLKDIS));
	dev_dbg(dai->dev, "HDMI_AUD_N[1-3]     0x%06x (%d)\n",
			n, n);
	dev_dbg(dai->dev, "HDMI_AUD_CTS[1-3]   0x%06x (%d)\n",
			cts, cts);
	dev_dbg(dai->dev, "HDMI_FC_AUDSCONF    0x%02x\n",
			hdmi_readb(HDMI_FC_AUDSCONF));
}
#else
static void dumpregs(struct snd_soc_dai *dai) {}
#endif

enum cea_speaker_placement {
	FL  = (1 <<  0),	/* Front Left           */
	FC  = (1 <<  1),	/* Front Center         */
	FR  = (1 <<  2),	/* Front Right          */
	FLC = (1 <<  3),	/* Front Left Center    */
	FRC = (1 <<  4),	/* Front Right Center   */
	RL  = (1 <<  5),	/* Rear Left            */
	RC  = (1 <<  6),	/* Rear Center          */
	RR  = (1 <<  7),	/* Rear Right           */
	RLC = (1 <<  8),	/* Rear Left Center     */
	RRC = (1 <<  9),	/* Rear Right Center    */
	LFE = (1 << 10),	/* Low Frequency Effect */
	FLW = (1 << 11),	/* Front Left Wide      */
	FRW = (1 << 12),	/* Front Right Wide     */
	FLH = (1 << 13),	/* Front Left High      */
	FCH = (1 << 14),	/* Front Center High    */
	FRH = (1 << 15),	/* Front Right High     */
	TC  = (1 << 16),	/* Top Center           */
};

/*
 * EDID SA bits in the CEA Speaker Allocation data block
 */
static int edid_speaker_allocation_bits[] = {
	[0] = FL | FR,
	[1] = LFE,
	[2] = FC,
	[3] = RL | RR,
	[4] = RC,
	[5] = FLC | FRC,
	[6] = RLC | RRC,
	[7] = FLW | FRW,
	[8] = FLH | FRH,
	[9] = TC,
	[10] = FCH,
};

struct cea_channel_speaker_allocation {
	int ca_index;
	int speakers[8];

	/* Derived values, just for convenience */
	int channels;
	int spk_mask;
};

/*
 * This is an ordered list!
 *
 * The preceding ones have better chances to be selected by
 * hdmi_channel_allocation().
 */
static struct cea_channel_speaker_allocation channel_allocations[] = {
	/*			  channel:  7     6    5    4    3     2    1    0  */
	{ .ca_index = 0x00, .speakers = {   0,    0,   0,   0,   0,    0,  FR,  FL },},
					 /* 2.1 */
	{ .ca_index = 0x01, .speakers = {   0,    0,   0,   0,   0,  LFE,  FR,  FL },},
					 /* Dolby Surround */
	{ .ca_index = 0x02, .speakers = {   0,    0,   0,   0,  FC,    0,  FR,  FL },},
	{ .ca_index = 0x03, .speakers = {   0,    0,   0,   0,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x04, .speakers = {   0,    0,   0,  RC,   0,    0,  FR,  FL },},
	{ .ca_index = 0x05, .speakers = {   0,    0,   0,  RC,   0,  LFE,  FR,  FL },},
	{ .ca_index = 0x06, .speakers = {   0,    0,   0,  RC,  FC,    0,  FR,  FL },},
	{ .ca_index = 0x07, .speakers = {   0,    0,   0,  RC,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x08, .speakers = {   0,    0,  RR,  RL,   0,    0,  FR,  FL },},
	{ .ca_index = 0x09, .speakers = {   0,    0,  RR,  RL,   0,  LFE,  FR,  FL },},
	{ .ca_index = 0x0a, .speakers = {   0,    0,  RR,  RL,  FC,    0,  FR,  FL },},
					 /* surround51 */
	{ .ca_index = 0x0b, .speakers = {   0,    0,  RR,  RL,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x0c, .speakers = {   0,   RC,  RR,  RL,   0,    0,  FR,  FL },},
	{ .ca_index = 0x0d, .speakers = {   0,   RC,  RR,  RL,   0,  LFE,  FR,  FL },},
	{ .ca_index = 0x0e, .speakers = {   0,   RC,  RR,  RL,  FC,    0,  FR,  FL },},
					 /* 6.1 */
	{ .ca_index = 0x0f, .speakers = {   0,   RC,  RR,  RL,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x10, .speakers = { RRC,  RLC,  RR,  RL,   0,    0,  FR,  FL },},
	{ .ca_index = 0x11, .speakers = { RRC,  RLC,  RR,  RL,   0,  LFE,  FR,  FL },},
	{ .ca_index = 0x12, .speakers = { RRC,  RLC,  RR,  RL,  FC,    0,  FR,  FL },},
					 /* surround71 */
	{ .ca_index = 0x13, .speakers = { RRC,  RLC,  RR,  RL,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x14, .speakers = { FRC,  FLC,   0,   0,   0,    0,  FR,  FL },},
	{ .ca_index = 0x15, .speakers = { FRC,  FLC,   0,   0,   0,  LFE,  FR,  FL },},
	{ .ca_index = 0x16, .speakers = { FRC,  FLC,   0,   0,  FC,    0,  FR,  FL },},
	{ .ca_index = 0x17, .speakers = { FRC,  FLC,   0,   0,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x18, .speakers = { FRC,  FLC,   0,  RC,   0,    0,  FR,  FL },},
	{ .ca_index = 0x19, .speakers = { FRC,  FLC,   0,  RC,   0,  LFE,  FR,  FL },},
	{ .ca_index = 0x1a, .speakers = { FRC,  FLC,   0,  RC,  FC,    0,  FR,  FL },},
	{ .ca_index = 0x1b, .speakers = { FRC,  FLC,   0,  RC,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x1c, .speakers = { FRC,  FLC,  RR,  RL,   0,    0,  FR,  FL },},
	{ .ca_index = 0x1d, .speakers = { FRC,  FLC,  RR,  RL,   0,  LFE,  FR,  FL },},
	{ .ca_index = 0x1e, .speakers = { FRC,  FLC,  RR,  RL,  FC,    0,  FR,  FL },},
	{ .ca_index = 0x1f, .speakers = { FRC,  FLC,  RR,  RL,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x20, .speakers = {   0,  FCH,  RR,  RL,  FC,    0,  FR,  FL },},
	{ .ca_index = 0x21, .speakers = {   0,  FCH,  RR,  RL,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x22, .speakers = {  TC,    0,  RR,  RL,  FC,    0,  FR,  FL },},
	{ .ca_index = 0x23, .speakers = {  TC,    0,  RR,  RL,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x24, .speakers = { FRH,  FLH,  RR,  RL,   0,    0,  FR,  FL },},
	{ .ca_index = 0x25, .speakers = { FRH,  FLH,  RR,  RL,   0,  LFE,  FR,  FL },},
	{ .ca_index = 0x26, .speakers = { FRW,  FLW,  RR,  RL,   0,    0,  FR,  FL },},
	{ .ca_index = 0x27, .speakers = { FRW,  FLW,  RR,  RL,   0,  LFE,  FR,  FL },},
	{ .ca_index = 0x28, .speakers = {  TC,   RC,  RR,  RL,  FC,    0,  FR,  FL },},
	{ .ca_index = 0x29, .speakers = {  TC,   RC,  RR,  RL,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x2a, .speakers = { FCH,   RC,  RR,  RL,  FC,    0,  FR,  FL },},
	{ .ca_index = 0x2b, .speakers = { FCH,   RC,  RR,  RL,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x2c, .speakers = {  TC,  FCH,  RR,  RL,  FC,    0,  FR,  FL },},
	{ .ca_index = 0x2d, .speakers = {  TC,  FCH,  RR,  RL,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x2e, .speakers = { FRH,  FLH,  RR,  RL,  FC,    0,  FR,  FL },},
	{ .ca_index = 0x2f, .speakers = { FRH,  FLH,  RR,  RL,  FC,  LFE,  FR,  FL },},
	{ .ca_index = 0x30, .speakers = { FRW,  FLW,  RR,  RL,  FC,    0,  FR,  FL },},
	{ .ca_index = 0x31, .speakers = { FRW,  FLW,  RR,  RL,  FC,  LFE,  FR,  FL },},
};

/* Compute derived values in channel_allocations[] */
static void init_channel_allocations(void)
{
	struct cea_channel_speaker_allocation *p;
	int i, j;

	for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
		p = channel_allocations + i;
		p->channels = 0;
		p->spk_mask = 0;
		for (j = 0; j < ARRAY_SIZE(p->speakers); j++)
			if (p->speakers[j]) {
				p->channels++;
				p->spk_mask |= p->speakers[j];
			}
	}
}

/*
 * The transformation takes two steps:
 *
 * speaker_alloc => (edid_speaker_allocation_bits[]) => spk_mask
 * spk_mask      => (channel_allocations[])         => CA
 *
 * TODO: it could select the wrong CA from multiple candidates.
*/
static int hdmi_channel_allocation(int channels)
{
	int spk_mask = 0, ca = 0, i, tmpchn, tmpspk;

	/* CA defaults to 0 for basic stereo audio */
	if (channels <= 2)
		return 0;

	/*
	 * Expand EDID's speaker allocation mask
	 *
	 * EDID tells the speaker mask in a compact(paired) form,
	 * expand EDID's notions to match the ones used by Audio InfoFrame.
	 */
	for (i = 0; i < ARRAY_SIZE(edid_speaker_allocation_bits); i++) {
		if (edid_cfg.speaker_alloc & (1 << i))
			spk_mask |= edid_speaker_allocation_bits[i];
	}

	/* Search for the first working match in the CA table */
	for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
		tmpchn = channel_allocations[i].channels;
		tmpspk = channel_allocations[i].spk_mask;

		if (channels == tmpchn && (spk_mask & tmpspk) == tmpspk) {
			ca = channel_allocations[i].ca_index;
			break;
		}
	}

	return ca;
}

static void hdmi_set_audio_infoframe(unsigned int channels)
{
	u8 audiconf0, audiconf2;

	/*
	 * From CEA-861-D spec:
	 * HDMI requires the CT, SS and SF fields to be set to 0 ("Refer
	 * to Stream Header") as these items are carried in the audio stream.
	 *
	 * So we only set the CC and CA fields.
	 */
	audiconf0 = ((channels - 1) << HDMI_FC_AUDICONF0_CC_OFFSET) &
		HDMI_FC_AUDICONF0_CC_MASK;

	audiconf2 = hdmi_channel_allocation(channels);

	hdmi_writeb(audiconf0, HDMI_FC_AUDICONF0);
	hdmi_writeb(0, HDMI_FC_AUDICONF1);
	hdmi_writeb(audiconf2, HDMI_FC_AUDICONF2);
	hdmi_writeb(0, HDMI_FC_AUDICONF3);
}

static int cea_audio_rates[HDMI_MAX_RATES] = {
	32000, 44100, 48000, 88200, 96000, 176400, 192000,
};

static void fsl_hdmi_get_playback_rates(void)
{
	int i, count = 0;
	u8 rates;

	/* Always assume basic audio support */
	rates = edid_cfg.sample_rates | 0x7;

	for (i = 0 ; i < HDMI_MAX_RATES ; i++)
		if ((rates & (1 << i)) != 0)
			playback_rates[count++] = cea_audio_rates[i];

	playback_constraint_rates.list = playback_rates;
	playback_constraint_rates.count = count;

	for (i = 0 ; i < playback_constraint_rates.count ; i++)
		pr_debug("%s: constraint = %d Hz\n", __func__, playback_rates[i]);
}

static void fsl_hdmi_get_playback_sample_size(void)
{
	int i = 0;

	/* Always assume basic audio support */
	playback_sample_size[i++] = 16;

	if (edid_cfg.sample_sizes & 0x4)
		playback_sample_size[i++] = 24;

	playback_constraint_bits.list = playback_sample_size;
	playback_constraint_bits.count = i;

	for (i = 0 ; i < playback_constraint_bits.count ; i++)
		pr_debug("%s: constraint = %d bits\n", __func__, playback_sample_size[i]);
}

static void fsl_hdmi_get_playback_channels(void)
{
	int channels = 2, i = 0;

	/* Always assume basic audio support */
	playback_channels[i++] = channels;
	channels += 2;

	while ((i < HDMI_MAX_CHANNEL_CONSTRAINTS) &&
			(channels <= edid_cfg.max_channels)) {
		playback_channels[i++] = channels;
		channels += 2;
	}

	playback_constraint_channels.list = playback_channels;
	playback_constraint_channels.count = i;

	for (i = 0 ; i < playback_constraint_channels.count ; i++)
		pr_debug("%s: constraint = %d channels\n", __func__, playback_channels[i]);
}

static int fsl_hdmi_update_constraints(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int ret;

	hdmi_get_edid_cfg(&edid_cfg);

	fsl_hdmi_get_playback_rates();
	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
			&playback_constraint_rates);
	if (ret)
		return ret;

	fsl_hdmi_get_playback_sample_size();
	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
			&playback_constraint_bits);
	if (ret)
		return ret;

	fsl_hdmi_get_playback_channels();
	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
			&playback_constraint_channels);
	if (ret)
		return ret;

	ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
	if (ret)
		return ret;

	return 0;
}

static int fsl_hdmi_soc_startup(struct snd_pcm_substream *substream,
				struct snd_soc_dai *dai)
{
	struct imx_hdmi *hdmi_data = snd_soc_dai_get_drvdata(dai);
	int ret;

	clk_prepare_enable(hdmi_data->mipi_core_clk);
	clk_prepare_enable(hdmi_data->isfr_clk);
	clk_prepare_enable(hdmi_data->iahb_clk);

	dev_dbg(dai->dev, "%s hdmi clks: mipi_core: %d isfr:%d iahb:%d\n", __func__,
			(int)clk_get_rate(hdmi_data->mipi_core_clk),
			(int)clk_get_rate(hdmi_data->isfr_clk),
			(int)clk_get_rate(hdmi_data->iahb_clk));

	ret = fsl_hdmi_update_constraints(substream);
	if (ret < 0)
		return ret;

	/* Indicates the subpacket represents a flatline sample */
	hdmi_audio_writeb(FC_AUDSCONF, AUD_PACKET_SAMPFIT, 0x0);

	return 0;
}

static void fsl_hdmi_soc_shutdown(struct snd_pcm_substream *substream,
				struct snd_soc_dai *dai)
{
	struct imx_hdmi *hdmi_data = snd_soc_dai_get_drvdata(dai);

	clk_disable_unprepare(hdmi_data->iahb_clk);
	clk_disable_unprepare(hdmi_data->isfr_clk);
	clk_disable_unprepare(hdmi_data->mipi_core_clk);
}

static int fsl_hdmi_soc_prepare(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	struct snd_pcm_runtime *runtime = substream->runtime;

	hdmi_set_audio_infoframe(runtime->channels);
	hdmi_audio_writeb(FC_AUDSCONF, AUD_PACKET_LAYOUT,
			(runtime->channels > 2) ? 0x1 : 0x0);
	hdmi_set_sample_rate(runtime->rate);
	dumpregs(dai);

	return 0;
}

static struct snd_soc_dai_ops fsl_hdmi_soc_dai_ops = {
	.startup = fsl_hdmi_soc_startup,
	.shutdown = fsl_hdmi_soc_shutdown,
	.prepare = fsl_hdmi_soc_prepare,
};

/* IEC60958 status functions */
static int fsl_hdmi_iec_info(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
	uinfo->count = 1;

	return 0;
}


static int fsl_hdmi_iec_get(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *uvalue)
{
	int i;

	for (i = 0 ; i < 4 ; i++)
		uvalue->value.iec958.status[i] = iec_header.status[i];

	return 0;
}

static int fsl_hdmi_iec_put(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *uvalue)
{
	int i;

	/* Do not allow professional mode */
	if (uvalue->value.iec958.status[0] & IEC958_AES0_PROFESSIONAL)
		return -EPERM;

	for (i = 0 ; i < 4 ; i++) {
		iec_header.status[i] = uvalue->value.iec958.status[i];
		pr_debug("%s status[%d]=0x%02x\n", __func__, i, iec_header.status[i]);
	}

	return 0;
}

static int fsl_hdmi_channels_info(struct snd_kcontrol *kcontrol,
			     struct snd_ctl_elem_info *uinfo)
{
	hdmi_get_edid_cfg(&edid_cfg);
	fsl_hdmi_get_playback_channels();

	uinfo->type  = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = playback_constraint_channels.count;

	return 0;
}


static int fsl_hdmi_channels_get(struct snd_kcontrol *kcontrol,
			    struct snd_ctl_elem_value *uvalue)
{
	int i;
	hdmi_get_edid_cfg(&edid_cfg);
	fsl_hdmi_get_playback_channels();

	for (i = 0 ; i < playback_constraint_channels.count ; i++)
		uvalue->value.integer.value[i] = playback_channels[i];

	return 0;
}

static int fsl_hdmi_rates_info(struct snd_kcontrol *kcontrol,
			     struct snd_ctl_elem_info *uinfo)
{
	hdmi_get_edid_cfg(&edid_cfg);
	fsl_hdmi_get_playback_rates();

	uinfo->type  = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = playback_constraint_rates.count;

	return 0;
}

static int fsl_hdmi_rates_get(struct snd_kcontrol *kcontrol,
			    struct snd_ctl_elem_value *uvalue)
{
	int i;
	hdmi_get_edid_cfg(&edid_cfg);
	fsl_hdmi_get_playback_rates();

	for (i = 0 ; i < playback_constraint_rates.count ; i++)
		uvalue->value.integer.value[i] = playback_rates[i];

	return 0;
}

static int fsl_hdmi_formats_info(struct snd_kcontrol *kcontrol,
			     struct snd_ctl_elem_info *uinfo)
{
	hdmi_get_edid_cfg(&edid_cfg);
	fsl_hdmi_get_playback_sample_size();

	uinfo->type  = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = playback_constraint_bits.count;

	return 0;
}

static int fsl_hdmi_formats_get(struct snd_kcontrol *kcontrol,
			    struct snd_ctl_elem_value *uvalue)
{
	int i;
	hdmi_get_edid_cfg(&edid_cfg);
	fsl_hdmi_get_playback_sample_size();

	for (i = 0 ; i < playback_constraint_bits.count ; i++)
		uvalue->value.integer.value[i] = playback_sample_size[i];

	return 0;
}

static struct snd_kcontrol_new fsl_hdmi_ctrls[] = {
	/* Status cchanel controller */
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
		.access = SNDRV_CTL_ELEM_ACCESS_READ |
			SNDRV_CTL_ELEM_ACCESS_WRITE |
			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
		.info = fsl_hdmi_iec_info,
		.get = fsl_hdmi_iec_get,
		.put = fsl_hdmi_iec_put,
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "HDMI Support Channels",
		.access = SNDRV_CTL_ELEM_ACCESS_READ |
			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
		.info = fsl_hdmi_channels_info,
		.get = fsl_hdmi_channels_get,
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "HDMI Support Rates",
		.access = SNDRV_CTL_ELEM_ACCESS_READ |
			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
		.info = fsl_hdmi_rates_info,
		.get = fsl_hdmi_rates_get,
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "HDMI Support Formats",
		.access = SNDRV_CTL_ELEM_ACCESS_READ |
			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
		.info = fsl_hdmi_formats_info,
		.get = fsl_hdmi_formats_get,
	},
};

static int fsl_hdmi_soc_dai_probe(struct snd_soc_dai *dai)
{
	int ret;

	init_channel_allocations();

	ret = snd_soc_add_dai_controls(dai, fsl_hdmi_ctrls,
			ARRAY_SIZE(fsl_hdmi_ctrls));
	if (ret)
		dev_warn(dai->dev, "failed to add dai controls\n");

	return 0;
}

static struct snd_soc_dai_driver fsl_hdmi_dai = {
	.probe = &fsl_hdmi_soc_dai_probe,
	.playback = {
		.channels_min = 2,
		.channels_max = 8,
		.rates = MXC_HDMI_RATES_PLAYBACK,
		.formats = MXC_HDMI_FORMATS_PLAYBACK,
	},
	.ops = &fsl_hdmi_soc_dai_ops,
};

static const struct snd_soc_component_driver fsl_hdmi_component = {
	.name		= "fsl-hdmi",
};

/* HDMI audio codec callbacks */
static int fsl_hdmi_audio_hw_params(struct device *dev, void *data,
			 struct hdmi_codec_daifmt *fmt,
			 struct hdmi_codec_params *hparms)
{
	dev_dbg(dev, "[%s]: %u Hz, %d bit, %d channels\n", __func__,
			hparms->sample_rate, hparms->sample_width, hparms->cea.channels);

	return 0;
}

static void fsl_hdmi_audio_shutdown(struct device *dev, void *data)
{
	dev_dbg(dev, "[%s]\n", __func__);
}

static const struct hdmi_codec_ops fsl_hdmi_audio_codec_ops = {
	.hw_params = fsl_hdmi_audio_hw_params,
	.audio_shutdown = fsl_hdmi_audio_shutdown,
};

static struct hdmi_codec_pdata codec_data = {
	.ops = &fsl_hdmi_audio_codec_ops,
	.i2s = 1,
	.max_i2s_channels = 8,
};

static int fsl_hdmi_dai_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct imx_hdmi *hdmi_data;
	int ret = 0;

	if (!np)
		return -ENODEV;

	if (!hdmi_get_registered()) {
		dev_err(&pdev->dev, "failed to probe. Load HDMI-video first.\n");
		return -ENOMEM;
	}

	hdmi_data = devm_kzalloc(&pdev->dev, sizeof(*hdmi_data), GFP_KERNEL);
	if (!hdmi_data) {
		dev_err(&pdev->dev, "failed to alloc hdmi_data\n");
		return -ENOMEM;
	}

	hdmi_data->pdev = pdev;

	memcpy(&hdmi_data->cpu_dai_drv, &fsl_hdmi_dai, sizeof(fsl_hdmi_dai));
	hdmi_data->cpu_dai_drv.name = np->name;

	hdmi_data->mipi_core_clk = devm_clk_get(&pdev->dev, "mipi_core");
	if (IS_ERR(hdmi_data->mipi_core_clk)) {
		ret = PTR_ERR(hdmi_data->mipi_core_clk);
		dev_err(&pdev->dev, "failed to get mipi core clk: %d\n", ret);
		return -EINVAL;
	}

	hdmi_data->isfr_clk = devm_clk_get(&pdev->dev, "hdmi_isfr");
	if (IS_ERR(hdmi_data->isfr_clk)) {
		ret = PTR_ERR(hdmi_data->isfr_clk);
		dev_err(&pdev->dev, "failed to get HDMI isfr clk: %d\n", ret);
		return -EINVAL;
	}

	hdmi_data->iahb_clk = devm_clk_get(&pdev->dev, "hdmi_iahb");
	if (IS_ERR(hdmi_data->iahb_clk)) {
		ret = PTR_ERR(hdmi_data->iahb_clk);
		dev_err(&pdev->dev, "failed to get HDMI ahb clk: %d\n", ret);
		return -EINVAL;
	}

	dev_set_drvdata(&pdev->dev, hdmi_data);
	ret = snd_soc_register_component(&pdev->dev, &fsl_hdmi_component,
					&hdmi_data->cpu_dai_drv, 1);
	if (ret) {
		dev_err(&pdev->dev, "register DAI failed\n");
		return ret;
	}

	hdmi_data->codec_dev = platform_device_register_data(&pdev->dev,
			HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_NONE,
			&codec_data, sizeof(codec_data));
	if (IS_ERR(hdmi_data->codec_dev)) {
		dev_err(&pdev->dev, "failed to register HDMI audio codec\n");
		ret = PTR_ERR(hdmi_data->codec_dev);
		goto fail;
	}

	hdmi_data->dma_dev = platform_device_alloc("imx-hdmi-audio", -1);
	if (!hdmi_data->dma_dev) {
		ret = -ENOMEM;
		goto fail_dma;
	}

	platform_set_drvdata(hdmi_data->dma_dev, hdmi_data);

	ret = platform_device_add(hdmi_data->dma_dev);
	if (ret) {
		platform_device_put(hdmi_data->dma_dev);
		goto fail_dma;
	}

	return 0;

fail_dma:
	platform_device_unregister(hdmi_data->codec_dev);
fail:
	snd_soc_unregister_component(&pdev->dev);

	return ret;
}

static int fsl_hdmi_dai_remove(struct platform_device *pdev)
{
	struct imx_hdmi *hdmi_data = platform_get_drvdata(pdev);

	platform_device_unregister(hdmi_data->dma_dev);
	platform_device_unregister(hdmi_data->codec_dev);
	snd_soc_unregister_component(&pdev->dev);

	return 0;
}

static const struct of_device_id fsl_hdmi_dai_dt_ids[] = {
	{ .compatible = "fsl,imx6dl-hdmi-audio", },
	{ .compatible = "fsl,imx6q-hdmi-audio", },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, fsl_hdmi_dai_dt_ids);

static struct platform_driver fsl_hdmi_driver = {
	.probe = fsl_hdmi_dai_probe,
	.remove = fsl_hdmi_dai_remove,
	.driver = {
		.name = "fsl-hdmi-dai",
		.owner = THIS_MODULE,
		.of_match_table = fsl_hdmi_dai_dt_ids,
	},
};
module_platform_driver(fsl_hdmi_driver);

MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("IMX HDMI TX DAI");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:fsl-hdmi-dai");