From ef0a172403b45e9ea223a1ca7336e43ce1777e74 Mon Sep 17 00:00:00 2001
From: Shengjiu Wang <shengjiu.wang@freescale.com>
Date: Wed, 27 Aug 2014 14:52:50 +0800
Subject: MLK-11530-01 ASoC: fsl_hdmi: port hdmi audio driver

cherry-pick below patch from v3.14.y:
ENGR00330403-2: ASoC: fsl_hdmi: port hdmi audio driver from imx_3.10.y

Port HDMI audio driver (CPU driver, machine driver, platform driver) from
imx_3.10.y.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>

During 4.14 rebase converted from snd_pcm_ops.copy to copy_user because
copy was removed by upstream

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
[ Aisheng: fix conflicts for a clean base and merge MLK-12244
file onwership change ]
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
 sound/soc/fsl/fsl_hdmi.c | 721 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 721 insertions(+)
 create mode 100644 sound/soc/fsl/fsl_hdmi.c

(limited to 'sound/soc/fsl/fsl_hdmi.c')

diff --git a/sound/soc/fsl/fsl_hdmi.c b/sound/soc/fsl/fsl_hdmi.c
new file mode 100644
index 000000000000..4f2ac274b85c
--- /dev/null
+++ b/sound/soc/fsl/fsl_hdmi.c
@@ -0,0 +1,721 @@
+/*
+ * 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 <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_debug(dai->dev, "HDMI_PHY_CONF0      0x%02x\n",
+			hdmi_readb(HDMI_PHY_CONF0));
+	dev_debug(dai->dev, "HDMI_MC_CLKDIS      0x%02x\n",
+			hdmi_readb(HDMI_MC_CLKDIS));
+	dev_debug(dai->dev, "HDMI_AUD_N[1-3]     0x%06x (%d)\n",
+			n, n);
+	dev_debug(dai->dev, "HDMI_AUD_CTS[1-3]   0x%06x (%d)\n",
+			cts, cts);
+	dev_debug(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",
+};
+
+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_simple(
+			"hdmi-audio-codec", -1, NULL, 0);
+	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 (IS_ERR(hdmi_data->dma_dev)) {
+		ret = PTR_ERR(hdmi_data->dma_dev);
+		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");
-- 
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