Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1854 insertions, 0 deletions

diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c
new file mode 100644
index 0000000000..ab95fb34a6
--- /dev/null
+++ b/sound/x86/intel_hdmi_audio.c
@@ -0,0 +1,1854 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *   intel_hdmi_audio.c - Intel HDMI audio driver
+ *
+ *  Copyright (C) 2016 Intel Corp
+ *  Authors:	Sailaja Bandarupalli <sailaja.bandarupalli@intel.com>
+ *		Ramesh Babu K V	<ramesh.babu@intel.com>
+ *		Vaibhav Agarwal <vaibhav.agarwal@intel.com>
+ *		Jerome Anand <jerome.anand@intel.com>
+ *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * ALSA driver for Intel HDMI audio
+ */
+
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <sound/core.h>
+#include <sound/asoundef.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/control.h>
+#include <sound/jack.h>
+#include <drm/drm_edid.h>
+#include <drm/intel_lpe_audio.h>
+#include "intel_hdmi_audio.h"
+
+#define INTEL_HDMI_AUDIO_SUSPEND_DELAY_MS  5000
+
+#define for_each_pipe(card_ctx, pipe) \
+	for ((pipe) = 0; (pipe) < (card_ctx)->num_pipes; (pipe)++)
+#define for_each_port(card_ctx, port) \
+	for ((port) = 0; (port) < (card_ctx)->num_ports; (port)++)
+
+/*standard module options for ALSA. This module supports only one card*/
+static int hdmi_card_index = SNDRV_DEFAULT_IDX1;
+static char *hdmi_card_id = SNDRV_DEFAULT_STR1;
+static bool single_port;
+
+module_param_named(index, hdmi_card_index, int, 0444);
+MODULE_PARM_DESC(index,
+		"Index value for INTEL Intel HDMI Audio controller.");
+module_param_named(id, hdmi_card_id, charp, 0444);
+MODULE_PARM_DESC(id,
+		"ID string for INTEL Intel HDMI Audio controller.");
+module_param(single_port, bool, 0444);
+MODULE_PARM_DESC(single_port,
+		"Single-port mode (for compatibility)");
+
+/*
+ * ELD SA bits in the CEA Speaker Allocation data block
+ */
+static const int eld_speaker_allocation_bits[] = {
+	[0] = FL | FR,
+	[1] = LFE,
+	[2] = FC,
+	[3] = RL | RR,
+	[4] = RC,
+	[5] = FLC | FRC,
+	[6] = RLC | RRC,
+	/* the following are not defined in ELD yet */
+	[7] = 0,
+};
+
+/*
+ * 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 } },
+				/* surround40 */
+{ .ca_index = 0x08,  .speakers = {   0,    0,  RR,  RL,   0,    0,  FR,  FL } },
+				/* surround41 */
+{ .ca_index = 0x09,  .speakers = {   0,    0,  RR,  RL,   0,  LFE,  FR,  FL } },
+				/* surround50 */
+{ .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 } },
+				/* 6.1 */
+{ .ca_index = 0x0f,  .speakers = {   0,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
+				/* surround71 */
+{ .ca_index = 0x13,  .speakers = { RRC,  RLC,  RR,  RL,  FC,  LFE,  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 = 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 } },
+{ .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 } },
+{ .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 } },
+};
+
+static const struct channel_map_table map_tables[] = {
+	{ SNDRV_CHMAP_FL,       0x00,   FL },
+	{ SNDRV_CHMAP_FR,       0x01,   FR },
+	{ SNDRV_CHMAP_RL,       0x04,   RL },
+	{ SNDRV_CHMAP_RR,       0x05,   RR },
+	{ SNDRV_CHMAP_LFE,      0x02,   LFE },
+	{ SNDRV_CHMAP_FC,       0x03,   FC },
+	{ SNDRV_CHMAP_RLC,      0x06,   RLC },
+	{ SNDRV_CHMAP_RRC,      0x07,   RRC },
+	{} /* terminator */
+};
+
+/* hardware capability structure */
+static const struct snd_pcm_hardware had_pcm_hardware = {
+	.info =	(SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_MMAP_VALID |
+		SNDRV_PCM_INFO_NO_PERIOD_WAKEUP),
+	.formats = (SNDRV_PCM_FMTBIT_S16_LE |
+		    SNDRV_PCM_FMTBIT_S24_LE |
+		    SNDRV_PCM_FMTBIT_S32_LE),
+	.rates = SNDRV_PCM_RATE_32000 |
+		SNDRV_PCM_RATE_44100 |
+		SNDRV_PCM_RATE_48000 |
+		SNDRV_PCM_RATE_88200 |
+		SNDRV_PCM_RATE_96000 |
+		SNDRV_PCM_RATE_176400 |
+		SNDRV_PCM_RATE_192000,
+	.rate_min = HAD_MIN_RATE,
+	.rate_max = HAD_MAX_RATE,
+	.channels_min = HAD_MIN_CHANNEL,
+	.channels_max = HAD_MAX_CHANNEL,
+	.buffer_bytes_max = HAD_MAX_BUFFER,
+	.period_bytes_min = HAD_MIN_PERIOD_BYTES,
+	.period_bytes_max = HAD_MAX_PERIOD_BYTES,
+	.periods_min = HAD_MIN_PERIODS,
+	.periods_max = HAD_MAX_PERIODS,
+	.fifo_size = HAD_FIFO_SIZE,
+};
+
+/* Get the active PCM substream;
+ * Call had_substream_put() for unreferecing.
+ * Don't call this inside had_spinlock, as it takes by itself
+ */
+static struct snd_pcm_substream *
+had_substream_get(struct snd_intelhad *intelhaddata)
+{
+	struct snd_pcm_substream *substream;
+	unsigned long flags;
+
+	spin_lock_irqsave(&intelhaddata->had_spinlock, flags);
+	substream = intelhaddata->stream_info.substream;
+	if (substream)
+		intelhaddata->stream_info.substream_refcount++;
+	spin_unlock_irqrestore(&intelhaddata->had_spinlock, flags);
+	return substream;
+}
+
+/* Unref the active PCM substream;
+ * Don't call this inside had_spinlock, as it takes by itself
+ */
+static void had_substream_put(struct snd_intelhad *intelhaddata)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&intelhaddata->had_spinlock, flags);
+	intelhaddata->stream_info.substream_refcount--;
+	spin_unlock_irqrestore(&intelhaddata->had_spinlock, flags);
+}
+
+static u32 had_config_offset(int pipe)
+{
+	switch (pipe) {
+	default:
+	case 0:
+		return AUDIO_HDMI_CONFIG_A;
+	case 1:
+		return AUDIO_HDMI_CONFIG_B;
+	case 2:
+		return AUDIO_HDMI_CONFIG_C;
+	}
+}
+
+/* Register access functions */
+static u32 had_read_register_raw(struct snd_intelhad_card *card_ctx,
+				 int pipe, u32 reg)
+{
+	return ioread32(card_ctx->mmio_start + had_config_offset(pipe) + reg);
+}
+
+static void had_write_register_raw(struct snd_intelhad_card *card_ctx,
+				   int pipe, u32 reg, u32 val)
+{
+	iowrite32(val, card_ctx->mmio_start + had_config_offset(pipe) + reg);
+}
+
+static void had_read_register(struct snd_intelhad *ctx, u32 reg, u32 *val)
+{
+	if (!ctx->connected)
+		*val = 0;
+	else
+		*val = had_read_register_raw(ctx->card_ctx, ctx->pipe, reg);
+}
+
+static void had_write_register(struct snd_intelhad *ctx, u32 reg, u32 val)
+{
+	if (ctx->connected)
+		had_write_register_raw(ctx->card_ctx, ctx->pipe, reg, val);
+}
+
+/*
+ * enable / disable audio configuration
+ *
+ * The normal read/modify should not directly be used on VLV2 for
+ * updating AUD_CONFIG register.
+ * This is because:
+ * Bit6 of AUD_CONFIG register is writeonly due to a silicon bug on VLV2
+ * HDMI IP. As a result a read-modify of AUD_CONFIG register will always
+ * clear bit6. AUD_CONFIG[6:4] represents the "channels" field of the
+ * register. This field should be 1xy binary for configuration with 6 or
+ * more channels. Read-modify of AUD_CONFIG (Eg. for enabling audio)
+ * causes the "channels" field to be updated as 0xy binary resulting in
+ * bad audio. The fix is to always write the AUD_CONFIG[6:4] with
+ * appropriate value when doing read-modify of AUD_CONFIG register.
+ */
+static void had_enable_audio(struct snd_intelhad *intelhaddata,
+			     bool enable)
+{
+	/* update the cached value */
+	intelhaddata->aud_config.regx.aud_en = enable;
+	had_write_register(intelhaddata, AUD_CONFIG,
+			   intelhaddata->aud_config.regval);
+}
+
+/* forcibly ACKs to both BUFFER_DONE and BUFFER_UNDERRUN interrupts */
+static void had_ack_irqs(struct snd_intelhad *ctx)
+{
+	u32 status_reg;
+
+	if (!ctx->connected)
+		return;
+	had_read_register(ctx, AUD_HDMI_STATUS, &status_reg);
+	status_reg |= HDMI_AUDIO_BUFFER_DONE | HDMI_AUDIO_UNDERRUN;
+	had_write_register(ctx, AUD_HDMI_STATUS, status_reg);
+	had_read_register(ctx, AUD_HDMI_STATUS, &status_reg);
+}
+
+/* Reset buffer pointers */
+static void had_reset_audio(struct snd_intelhad *intelhaddata)
+{
+	had_write_register(intelhaddata, AUD_HDMI_STATUS,
+			   AUD_HDMI_STATUSG_MASK_FUNCRST);
+	had_write_register(intelhaddata, AUD_HDMI_STATUS, 0);
+}
+
+/*
+ * initialize audio channel status registers
+ * This function is called in the prepare callback
+ */
+static int had_prog_status_reg(struct snd_pcm_substream *substream,
+			struct snd_intelhad *intelhaddata)
+{
+	union aud_ch_status_0 ch_stat0 = {.regval = 0};
+	union aud_ch_status_1 ch_stat1 = {.regval = 0};
+
+	ch_stat0.regx.lpcm_id = (intelhaddata->aes_bits &
+					  IEC958_AES0_NONAUDIO) >> 1;
+	ch_stat0.regx.clk_acc = (intelhaddata->aes_bits &
+					  IEC958_AES3_CON_CLOCK) >> 4;
+
+	switch (substream->runtime->rate) {
+	case AUD_SAMPLE_RATE_32:
+		ch_stat0.regx.samp_freq = CH_STATUS_MAP_32KHZ;
+		break;
+
+	case AUD_SAMPLE_RATE_44_1:
+		ch_stat0.regx.samp_freq = CH_STATUS_MAP_44KHZ;
+		break;
+	case AUD_SAMPLE_RATE_48:
+		ch_stat0.regx.samp_freq = CH_STATUS_MAP_48KHZ;
+		break;
+	case AUD_SAMPLE_RATE_88_2:
+		ch_stat0.regx.samp_freq = CH_STATUS_MAP_88KHZ;
+		break;
+	case AUD_SAMPLE_RATE_96:
+		ch_stat0.regx.samp_freq = CH_STATUS_MAP_96KHZ;
+		break;
+	case AUD_SAMPLE_RATE_176_4:
+		ch_stat0.regx.samp_freq = CH_STATUS_MAP_176KHZ;
+		break;
+	case AUD_SAMPLE_RATE_192:
+		ch_stat0.regx.samp_freq = CH_STATUS_MAP_192KHZ;
+		break;
+
+	default:
+		/* control should never come here */
+		return -EINVAL;
+	}
+
+	had_write_register(intelhaddata,
+			   AUD_CH_STATUS_0, ch_stat0.regval);
+
+	switch (substream->runtime->format) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		ch_stat1.regx.max_wrd_len = MAX_SMPL_WIDTH_20;
+		ch_stat1.regx.wrd_len = SMPL_WIDTH_16BITS;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+	case SNDRV_PCM_FORMAT_S32_LE:
+		ch_stat1.regx.max_wrd_len = MAX_SMPL_WIDTH_24;
+		ch_stat1.regx.wrd_len = SMPL_WIDTH_24BITS;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	had_write_register(intelhaddata,
+			   AUD_CH_STATUS_1, ch_stat1.regval);
+	return 0;
+}
+
+/*
+ * function to initialize audio
+ * registers and buffer configuration registers
+ * This function is called in the prepare callback
+ */
+static int had_init_audio_ctrl(struct snd_pcm_substream *substream,
+			       struct snd_intelhad *intelhaddata)
+{
+	union aud_cfg cfg_val = {.regval = 0};
+	union aud_buf_config buf_cfg = {.regval = 0};
+	u8 channels;
+
+	had_prog_status_reg(substream, intelhaddata);
+
+	buf_cfg.regx.audio_fifo_watermark = FIFO_THRESHOLD;
+	buf_cfg.regx.dma_fifo_watermark = DMA_FIFO_THRESHOLD;
+	buf_cfg.regx.aud_delay = 0;
+	had_write_register(intelhaddata, AUD_BUF_CONFIG, buf_cfg.regval);
+
+	channels = substream->runtime->channels;
+	cfg_val.regx.num_ch = channels - 2;
+	if (channels <= 2)
+		cfg_val.regx.layout = LAYOUT0;
+	else
+		cfg_val.regx.layout = LAYOUT1;
+
+	if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE)
+		cfg_val.regx.packet_mode = 1;
+
+	if (substream->runtime->format == SNDRV_PCM_FORMAT_S32_LE)
+		cfg_val.regx.left_align = 1;
+
+	cfg_val.regx.val_bit = 1;
+
+	/* fix up the DP bits */
+	if (intelhaddata->dp_output) {
+		cfg_val.regx.dp_modei = 1;
+		cfg_val.regx.set = 1;
+	}
+
+	had_write_register(intelhaddata, AUD_CONFIG, cfg_val.regval);
+	intelhaddata->aud_config = cfg_val;
+	return 0;
+}
+
+/*
+ * Compute derived values in channel_allocations[].
+ */
+static void init_channel_allocations(void)
+{
+	int i, j;
+	struct cea_channel_speaker_allocation *p;
+
+	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:
+ *
+ *      eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask
+ *            spk_mask => (channel_allocations[])         => ai->CA
+ *
+ * TODO: it could select the wrong CA from multiple candidates.
+ */
+static int had_channel_allocation(struct snd_intelhad *intelhaddata,
+				  int channels)
+{
+	int i;
+	int ca = 0;
+	int spk_mask = 0;
+
+	/*
+	 * CA defaults to 0 for basic stereo audio
+	 */
+	if (channels <= 2)
+		return 0;
+
+	/*
+	 * expand ELD's speaker allocation mask
+	 *
+	 * ELD tells the speaker mask in a compact(paired) form,
+	 * expand ELD's notions to match the ones used by Audio InfoFrame.
+	 */
+
+	for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
+		if (intelhaddata->eld[DRM_ELD_SPEAKER] & (1 << i))
+			spk_mask |= eld_speaker_allocation_bits[i];
+	}
+
+	/* search for the first working match in the CA table */
+	for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
+		if (channels == channel_allocations[i].channels &&
+		(spk_mask & channel_allocations[i].spk_mask) ==
+				channel_allocations[i].spk_mask) {
+			ca = channel_allocations[i].ca_index;
+			break;
+		}
+	}
+
+	dev_dbg(intelhaddata->dev, "select CA 0x%x for %d\n", ca, channels);
+
+	return ca;
+}
+
+/* from speaker bit mask to ALSA API channel position */
+static int spk_to_chmap(int spk)
+{
+	const struct channel_map_table *t = map_tables;
+
+	for (; t->map; t++) {
+		if (t->spk_mask == spk)
+			return t->map;
+	}
+	return 0;
+}
+
+static void had_build_channel_allocation_map(struct snd_intelhad *intelhaddata)
+{
+	int i, c;
+	int spk_mask = 0;
+	struct snd_pcm_chmap_elem *chmap;
+	u8 eld_high, eld_high_mask = 0xF0;
+	u8 high_msb;
+
+	kfree(intelhaddata->chmap->chmap);
+	intelhaddata->chmap->chmap = NULL;
+
+	chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
+	if (!chmap)
+		return;
+
+	dev_dbg(intelhaddata->dev, "eld speaker = %x\n",
+		intelhaddata->eld[DRM_ELD_SPEAKER]);
+
+	/* WA: Fix the max channel supported to 8 */
+
+	/*
+	 * Sink may support more than 8 channels, if eld_high has more than
+	 * one bit set. SOC supports max 8 channels.
+	 * Refer eld_speaker_allocation_bits, for sink speaker allocation
+	 */
+
+	/* if 0x2F < eld < 0x4F fall back to 0x2f, else fall back to 0x4F */
+	eld_high = intelhaddata->eld[DRM_ELD_SPEAKER] & eld_high_mask;
+	if ((eld_high & (eld_high-1)) && (eld_high > 0x1F)) {
+		/* eld_high & (eld_high-1): if more than 1 bit set */
+		/* 0x1F: 7 channels */
+		for (i = 1; i < 4; i++) {
+			high_msb = eld_high & (0x80 >> i);
+			if (high_msb) {
+				intelhaddata->eld[DRM_ELD_SPEAKER] &=
+					high_msb | 0xF;
+				break;
+			}
+		}
+	}
+
+	for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
+		if (intelhaddata->eld[DRM_ELD_SPEAKER] & (1 << i))
+			spk_mask |= eld_speaker_allocation_bits[i];
+	}
+
+	for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
+		if (spk_mask == channel_allocations[i].spk_mask) {
+			for (c = 0; c < channel_allocations[i].channels; c++) {
+				chmap->map[c] = spk_to_chmap(
+					channel_allocations[i].speakers[
+						(MAX_SPEAKERS - 1) - c]);
+			}
+			chmap->channels = channel_allocations[i].channels;
+			intelhaddata->chmap->chmap = chmap;
+			break;
+		}
+	}
+	if (i >= ARRAY_SIZE(channel_allocations))
+		kfree(chmap);
+}
+
+/*
+ * ALSA API channel-map control callbacks
+ */
+static int had_chmap_ctl_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = HAD_MAX_CHANNEL;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = SNDRV_CHMAP_LAST;
+	return 0;
+}
+
+static int had_chmap_ctl_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
+	struct snd_intelhad *intelhaddata = info->private_data;
+	int i;
+	const struct snd_pcm_chmap_elem *chmap;
+
+	memset(ucontrol->value.integer.value, 0,
+	       sizeof(long) * HAD_MAX_CHANNEL);
+	mutex_lock(&intelhaddata->mutex);
+	if (!intelhaddata->chmap->chmap) {
+		mutex_unlock(&intelhaddata->mutex);
+		return 0;
+	}
+
+	chmap = intelhaddata->chmap->chmap;
+	for (i = 0; i < chmap->channels; i++)
+		ucontrol->value.integer.value[i] = chmap->map[i];
+	mutex_unlock(&intelhaddata->mutex);
+
+	return 0;
+}
+
+static int had_register_chmap_ctls(struct snd_intelhad *intelhaddata,
+						struct snd_pcm *pcm)
+{
+	int err;
+
+	err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+			NULL, 0, (unsigned long)intelhaddata,
+			&intelhaddata->chmap);
+	if (err < 0)
+		return err;
+
+	intelhaddata->chmap->private_data = intelhaddata;
+	intelhaddata->chmap->kctl->info = had_chmap_ctl_info;
+	intelhaddata->chmap->kctl->get = had_chmap_ctl_get;
+	intelhaddata->chmap->chmap = NULL;
+	return 0;
+}
+
+/*
+ * Initialize Data Island Packets registers
+ * This function is called in the prepare callback
+ */
+static void had_prog_dip(struct snd_pcm_substream *substream,
+			 struct snd_intelhad *intelhaddata)
+{
+	int i;
+	union aud_ctrl_st ctrl_state = {.regval = 0};
+	union aud_info_frame2 frame2 = {.regval = 0};
+	union aud_info_frame3 frame3 = {.regval = 0};
+	u8 checksum = 0;
+	u32 info_frame;
+	int channels;
+	int ca;
+
+	channels = substream->runtime->channels;
+
+	had_write_register(intelhaddata, AUD_CNTL_ST, ctrl_state.regval);
+
+	ca = had_channel_allocation(intelhaddata, channels);
+	if (intelhaddata->dp_output) {
+		info_frame = DP_INFO_FRAME_WORD1;
+		frame2.regval = (substream->runtime->channels - 1) | (ca << 24);
+	} else {
+		info_frame = HDMI_INFO_FRAME_WORD1;
+		frame2.regx.chnl_cnt = substream->runtime->channels - 1;
+		frame3.regx.chnl_alloc = ca;
+
+		/* Calculte the byte wide checksum for all valid DIP words */
+		for (i = 0; i < BYTES_PER_WORD; i++)
+			checksum += (info_frame >> (i * 8)) & 0xff;
+		for (i = 0; i < BYTES_PER_WORD; i++)
+			checksum += (frame2.regval >> (i * 8)) & 0xff;
+		for (i = 0; i < BYTES_PER_WORD; i++)
+			checksum += (frame3.regval >> (i * 8)) & 0xff;
+
+		frame2.regx.chksum = -(checksum);
+	}
+
+	had_write_register(intelhaddata, AUD_HDMIW_INFOFR, info_frame);
+	had_write_register(intelhaddata, AUD_HDMIW_INFOFR, frame2.regval);
+	had_write_register(intelhaddata, AUD_HDMIW_INFOFR, frame3.regval);
+
+	/* program remaining DIP words with zero */
+	for (i = 0; i < HAD_MAX_DIP_WORDS-VALID_DIP_WORDS; i++)
+		had_write_register(intelhaddata, AUD_HDMIW_INFOFR, 0x0);
+
+	ctrl_state.regx.dip_freq = 1;
+	ctrl_state.regx.dip_en_sta = 1;
+	had_write_register(intelhaddata, AUD_CNTL_ST, ctrl_state.regval);
+}
+
+static int had_calculate_maud_value(u32 aud_samp_freq, u32 link_rate)
+{
+	u32 maud_val;
+
+	/* Select maud according to DP 1.2 spec */
+	if (link_rate == DP_2_7_GHZ) {
+		switch (aud_samp_freq) {
+		case AUD_SAMPLE_RATE_32:
+			maud_val = AUD_SAMPLE_RATE_32_DP_2_7_MAUD_VAL;
+			break;
+
+		case AUD_SAMPLE_RATE_44_1:
+			maud_val = AUD_SAMPLE_RATE_44_1_DP_2_7_MAUD_VAL;
+			break;
+
+		case AUD_SAMPLE_RATE_48:
+			maud_val = AUD_SAMPLE_RATE_48_DP_2_7_MAUD_VAL;
+			break;
+
+		case AUD_SAMPLE_RATE_88_2:
+			maud_val = AUD_SAMPLE_RATE_88_2_DP_2_7_MAUD_VAL;
+			break;
+
+		case AUD_SAMPLE_RATE_96:
+			maud_val = AUD_SAMPLE_RATE_96_DP_2_7_MAUD_VAL;
+			break;
+
+		case AUD_SAMPLE_RATE_176_4:
+			maud_val = AUD_SAMPLE_RATE_176_4_DP_2_7_MAUD_VAL;
+			break;
+
+		case HAD_MAX_RATE:
+			maud_val = HAD_MAX_RATE_DP_2_7_MAUD_VAL;
+			break;
+
+		default:
+			maud_val = -EINVAL;
+			break;
+		}
+	} else if (link_rate == DP_1_62_GHZ) {
+		switch (aud_samp_freq) {
+		case AUD_SAMPLE_RATE_32:
+			maud_val = AUD_SAMPLE_RATE_32_DP_1_62_MAUD_VAL;
+			break;
+
+		case AUD_SAMPLE_RATE_44_1:
+			maud_val = AUD_SAMPLE_RATE_44_1_DP_1_62_MAUD_VAL;
+			break;
+
+		case AUD_SAMPLE_RATE_48:
+			maud_val = AUD_SAMPLE_RATE_48_DP_1_62_MAUD_VAL;
+			break;
+
+		case AUD_SAMPLE_RATE_88_2:
+			maud_val = AUD_SAMPLE_RATE_88_2_DP_1_62_MAUD_VAL;
+			break;
+
+		case AUD_SAMPLE_RATE_96:
+			maud_val = AUD_SAMPLE_RATE_96_DP_1_62_MAUD_VAL;
+			break;
+
+		case AUD_SAMPLE_RATE_176_4:
+			maud_val = AUD_SAMPLE_RATE_176_4_DP_1_62_MAUD_VAL;
+			break;
+
+		case HAD_MAX_RATE:
+			maud_val = HAD_MAX_RATE_DP_1_62_MAUD_VAL;
+			break;
+
+		default:
+			maud_val = -EINVAL;
+			break;
+		}
+	} else
+		maud_val = -EINVAL;
+
+	return maud_val;
+}
+
+/*
+ * Program HDMI audio CTS value
+ *
+ * @aud_samp_freq: sampling frequency of audio data
+ * @tmds: sampling frequency of the display data
+ * @link_rate: DP link rate
+ * @n_param: N value, depends on aud_samp_freq
+ * @intelhaddata: substream private data
+ *
+ * Program CTS register based on the audio and display sampling frequency
+ */
+static void had_prog_cts(u32 aud_samp_freq, u32 tmds, u32 link_rate,
+			 u32 n_param, struct snd_intelhad *intelhaddata)
+{
+	u32 cts_val;
+	u64 dividend, divisor;
+
+	if (intelhaddata->dp_output) {
+		/* Substitute cts_val with Maud according to DP 1.2 spec*/
+		cts_val = had_calculate_maud_value(aud_samp_freq, link_rate);
+	} else {
+		/* Calculate CTS according to HDMI 1.3a spec*/
+		dividend = (u64)tmds * n_param*1000;
+		divisor = 128 * aud_samp_freq;
+		cts_val = div64_u64(dividend, divisor);
+	}
+	dev_dbg(intelhaddata->dev, "TMDS value=%d, N value=%d, CTS Value=%d\n",
+		 tmds, n_param, cts_val);
+	had_write_register(intelhaddata, AUD_HDMI_CTS, (BIT(24) | cts_val));
+}
+
+static int had_calculate_n_value(u32 aud_samp_freq)
+{
+	int n_val;
+
+	/* Select N according to HDMI 1.3a spec*/
+	switch (aud_samp_freq) {
+	case AUD_SAMPLE_RATE_32:
+		n_val = 4096;
+		break;
+
+	case AUD_SAMPLE_RATE_44_1:
+		n_val = 6272;
+		break;
+
+	case AUD_SAMPLE_RATE_48:
+		n_val = 6144;
+		break;
+
+	case AUD_SAMPLE_RATE_88_2:
+		n_val = 12544;
+		break;
+
+	case AUD_SAMPLE_RATE_96:
+		n_val = 12288;
+		break;
+
+	case AUD_SAMPLE_RATE_176_4:
+		n_val = 25088;
+		break;
+
+	case HAD_MAX_RATE:
+		n_val = 24576;
+		break;
+
+	default:
+		n_val = -EINVAL;
+		break;
+	}
+	return n_val;
+}
+
+/*
+ * Program HDMI audio N value
+ *
+ * @aud_samp_freq: sampling frequency of audio data
+ * @n_param: N value, depends on aud_samp_freq
+ * @intelhaddata: substream private data
+ *
+ * This function is called in the prepare callback.
+ * It programs based on the audio and display sampling frequency
+ */
+static int had_prog_n(u32 aud_samp_freq, u32 *n_param,
+		      struct snd_intelhad *intelhaddata)
+{
+	int n_val;
+
+	if (intelhaddata->dp_output) {
+		/*
+		 * According to DP specs, Maud and Naud values hold
+		 * a relationship, which is stated as:
+		 * Maud/Naud = 512 * fs / f_LS_Clk
+		 * where, fs is the sampling frequency of the audio stream
+		 * and Naud is 32768 for Async clock.
+		 */
+
+		n_val = DP_NAUD_VAL;
+	} else
+		n_val =	had_calculate_n_value(aud_samp_freq);
+
+	if (n_val < 0)
+		return n_val;
+
+	had_write_register(intelhaddata, AUD_N_ENABLE, (BIT(24) | n_val));
+	*n_param = n_val;
+	return 0;
+}
+
+/*
+ * PCM ring buffer handling
+ *
+ * The hardware provides a ring buffer with the fixed 4 buffer descriptors
+ * (BDs).  The driver maps these 4 BDs onto the PCM ring buffer.  The mapping
+ * moves at each period elapsed.  The below illustrates how it works:
+ *
+ * At time=0
+ *  PCM | 0 | 1 | 2 | 3 | 4 | 5 | .... |n-1|
+ *  BD  | 0 | 1 | 2 | 3 |
+ *
+ * At time=1 (period elapsed)
+ *  PCM | 0 | 1 | 2 | 3 | 4 | 5 | .... |n-1|
+ *  BD      | 1 | 2 | 3 | 0 |
+ *
+ * At time=2 (second period elapsed)
+ *  PCM | 0 | 1 | 2 | 3 | 4 | 5 | .... |n-1|
+ *  BD          | 2 | 3 | 0 | 1 |
+ *
+ * The bd_head field points to the index of the BD to be read.  It's also the
+ * position to be filled at next.  The pcm_head and the pcm_filled fields
+ * point to the indices of the current position and of the next position to
+ * be filled, respectively.  For PCM buffer there are both _head and _filled
+ * because they may be difference when nperiods > 4.  For example, in the
+ * example above at t=1, bd_head=1 and pcm_head=1 while pcm_filled=5:
+ *
+ * pcm_head (=1) --v               v-- pcm_filled (=5)
+ *       PCM | 0 | 1 | 2 | 3 | 4 | 5 | .... |n-1|
+ *       BD      | 1 | 2 | 3 | 0 |
+ *  bd_head (=1) --^               ^-- next to fill (= bd_head)
+ *
+ * For nperiods < 4, the remaining BDs out of 4 are marked as invalid, so that
+ * the hardware skips those BDs in the loop.
+ *
+ * An exceptional setup is the case with nperiods=1.  Since we have to update
+ * BDs after finishing one BD processing, we'd need at least two BDs, where
+ * both BDs point to the same content, the same address, the same size of the
+ * whole PCM buffer.
+ */
+
+#define AUD_BUF_ADDR(x)		(AUD_BUF_A_ADDR + (x) * HAD_REG_WIDTH)
+#define AUD_BUF_LEN(x)		(AUD_BUF_A_LENGTH + (x) * HAD_REG_WIDTH)
+
+/* Set up a buffer descriptor at the "filled" position */
+static void had_prog_bd(struct snd_pcm_substream *substream,
+			struct snd_intelhad *intelhaddata)
+{
+	int idx = intelhaddata->bd_head;
+	int ofs = intelhaddata->pcmbuf_filled * intelhaddata->period_bytes;
+	u32 addr = substream->runtime->dma_addr + ofs;
+
+	addr |= AUD_BUF_VALID;
+	if (!substream->runtime->no_period_wakeup)
+		addr |= AUD_BUF_INTR_EN;
+	had_write_register(intelhaddata, AUD_BUF_ADDR(idx), addr);
+	had_write_register(intelhaddata, AUD_BUF_LEN(idx),
+			   intelhaddata->period_bytes);
+
+	/* advance the indices to the next */
+	intelhaddata->bd_head++;
+	intelhaddata->bd_head %= intelhaddata->num_bds;
+	intelhaddata->pcmbuf_filled++;
+	intelhaddata->pcmbuf_filled %= substream->runtime->periods;
+}
+
+/* invalidate a buffer descriptor with the given index */
+static void had_invalidate_bd(struct snd_intelhad *intelhaddata,
+			      int idx)
+{
+	had_write_register(intelhaddata, AUD_BUF_ADDR(idx), 0);
+	had_write_register(intelhaddata, AUD_BUF_LEN(idx), 0);
+}
+
+/* Initial programming of ring buffer */
+static void had_init_ringbuf(struct snd_pcm_substream *substream,
+			     struct snd_intelhad *intelhaddata)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int i, num_periods;
+
+	num_periods = runtime->periods;
+	intelhaddata->num_bds = min(num_periods, HAD_NUM_OF_RING_BUFS);
+	/* set the minimum 2 BDs for num_periods=1 */
+	intelhaddata->num_bds = max(intelhaddata->num_bds, 2U);
+	intelhaddata->period_bytes =
+		frames_to_bytes(runtime, runtime->period_size);
+	WARN_ON(intelhaddata->period_bytes & 0x3f);
+
+	intelhaddata->bd_head = 0;
+	intelhaddata->pcmbuf_head = 0;
+	intelhaddata->pcmbuf_filled = 0;
+
+	for (i = 0; i < HAD_NUM_OF_RING_BUFS; i++) {
+		if (i < intelhaddata->num_bds)
+			had_prog_bd(substream, intelhaddata);
+		else /* invalidate the rest */
+			had_invalidate_bd(intelhaddata, i);
+	}
+
+	intelhaddata->bd_head = 0; /* reset at head again before starting */
+}
+
+/* process a bd, advance to the next */
+static void had_advance_ringbuf(struct snd_pcm_substream *substream,
+				struct snd_intelhad *intelhaddata)
+{
+	int num_periods = substream->runtime->periods;
+
+	/* reprogram the next buffer */
+	had_prog_bd(substream, intelhaddata);
+
+	/* proceed to next */
+	intelhaddata->pcmbuf_head++;
+	intelhaddata->pcmbuf_head %= num_periods;
+}
+
+/* process the current BD(s);
+ * returns the current PCM buffer byte position, or -EPIPE for underrun.
+ */
+static int had_process_ringbuf(struct snd_pcm_substream *substream,
+			       struct snd_intelhad *intelhaddata)
+{
+	int len, processed;
+	unsigned long flags;
+
+	processed = 0;
+	spin_lock_irqsave(&intelhaddata->had_spinlock, flags);
+	for (;;) {
+		/* get the remaining bytes on the buffer */
+		had_read_register(intelhaddata,
+				  AUD_BUF_LEN(intelhaddata->bd_head),
+				  &len);
+		if (len < 0 || len > intelhaddata->period_bytes) {
+			dev_dbg(intelhaddata->dev, "Invalid buf length %d\n",
+				len);
+			len = -EPIPE;
+			goto out;
+		}
+
+		if (len > 0) /* OK, this is the current buffer */
+			break;
+
+		/* len=0 => already empty, check the next buffer */
+		if (++processed >= intelhaddata->num_bds) {
+			len = -EPIPE; /* all empty? - report underrun */
+			goto out;
+		}
+		had_advance_ringbuf(substream, intelhaddata);
+	}
+
+	len = intelhaddata->period_bytes - len;
+	len += intelhaddata->period_bytes * intelhaddata->pcmbuf_head;
+ out:
+	spin_unlock_irqrestore(&intelhaddata->had_spinlock, flags);
+	return len;
+}
+
+/* called from irq handler */
+static void had_process_buffer_done(struct snd_intelhad *intelhaddata)
+{
+	struct snd_pcm_substream *substream;
+
+	substream = had_substream_get(intelhaddata);
+	if (!substream)
+		return; /* no stream? - bail out */
+
+	if (!intelhaddata->connected) {
+		snd_pcm_stop_xrun(substream);
+		goto out; /* disconnected? - bail out */
+	}
+
+	/* process or stop the stream */
+	if (had_process_ringbuf(substream, intelhaddata) < 0)
+		snd_pcm_stop_xrun(substream);
+	else
+		snd_pcm_period_elapsed(substream);
+
+ out:
+	had_substream_put(intelhaddata);
+}
+
+/*
+ * The interrupt status 'sticky' bits might not be cleared by
+ * setting '1' to that bit once...
+ */
+static void wait_clear_underrun_bit(struct snd_intelhad *intelhaddata)
+{
+	int i;
+	u32 val;
+
+	for (i = 0; i < 100; i++) {
+		/* clear bit30, 31 AUD_HDMI_STATUS */
+		had_read_register(intelhaddata, AUD_HDMI_STATUS, &val);
+		if (!(val & AUD_HDMI_STATUS_MASK_UNDERRUN))
+			return;
+		udelay(100);
+		cond_resched();
+		had_write_register(intelhaddata, AUD_HDMI_STATUS, val);
+	}
+	dev_err(intelhaddata->dev, "Unable to clear UNDERRUN bits\n");
+}
+
+/* Perform some reset procedure after stopping the stream;
+ * this is called from prepare or hw_free callbacks once after trigger STOP
+ * or underrun has been processed in order to settle down the h/w state.
+ */
+static int had_pcm_sync_stop(struct snd_pcm_substream *substream)
+{
+	struct snd_intelhad *intelhaddata = snd_pcm_substream_chip(substream);
+
+	if (!intelhaddata->connected)
+		return 0;
+
+	/* Reset buffer pointers */
+	had_reset_audio(intelhaddata);
+	wait_clear_underrun_bit(intelhaddata);
+	return 0;
+}
+
+/* called from irq handler */
+static void had_process_buffer_underrun(struct snd_intelhad *intelhaddata)
+{
+	struct snd_pcm_substream *substream;
+
+	/* Report UNDERRUN error to above layers */
+	substream = had_substream_get(intelhaddata);
+	if (substream) {
+		snd_pcm_stop_xrun(substream);
+		had_substream_put(intelhaddata);
+	}
+}
+
+/*
+ * ALSA PCM open callback
+ */
+static int had_pcm_open(struct snd_pcm_substream *substream)
+{
+	struct snd_intelhad *intelhaddata;
+	struct snd_pcm_runtime *runtime;
+	int retval;
+
+	intelhaddata = snd_pcm_substream_chip(substream);
+	runtime = substream->runtime;
+
+	retval = pm_runtime_resume_and_get(intelhaddata->dev);
+	if (retval < 0)
+		return retval;
+
+	/* set the runtime hw parameter with local snd_pcm_hardware struct */
+	runtime->hw = had_pcm_hardware;
+
+	retval = snd_pcm_hw_constraint_integer(runtime,
+			 SNDRV_PCM_HW_PARAM_PERIODS);
+	if (retval < 0)
+		goto error;
+
+	/* Make sure, that the period size is always aligned
+	 * 64byte boundary
+	 */
+	retval = snd_pcm_hw_constraint_step(substream->runtime, 0,
+			SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64);
+	if (retval < 0)
+		goto error;
+
+	retval = snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
+	if (retval < 0)
+		goto error;
+
+	/* expose PCM substream */
+	spin_lock_irq(&intelhaddata->had_spinlock);
+	intelhaddata->stream_info.substream = substream;
+	intelhaddata->stream_info.substream_refcount++;
+	spin_unlock_irq(&intelhaddata->had_spinlock);
+
+	return retval;
+ error:
+	pm_runtime_mark_last_busy(intelhaddata->dev);
+	pm_runtime_put_autosuspend(intelhaddata->dev);
+	return retval;
+}
+
+/*
+ * ALSA PCM close callback
+ */
+static int had_pcm_close(struct snd_pcm_substream *substream)
+{
+	struct snd_intelhad *intelhaddata;
+
+	intelhaddata = snd_pcm_substream_chip(substream);
+
+	/* unreference and sync with the pending PCM accesses */
+	spin_lock_irq(&intelhaddata->had_spinlock);
+	intelhaddata->stream_info.substream = NULL;
+	intelhaddata->stream_info.substream_refcount--;
+	while (intelhaddata->stream_info.substream_refcount > 0) {
+		spin_unlock_irq(&intelhaddata->had_spinlock);
+		cpu_relax();
+		spin_lock_irq(&intelhaddata->had_spinlock);
+	}
+	spin_unlock_irq(&intelhaddata->had_spinlock);
+
+	pm_runtime_mark_last_busy(intelhaddata->dev);
+	pm_runtime_put_autosuspend(intelhaddata->dev);
+	return 0;
+}
+
+/*
+ * ALSA PCM hw_params callback
+ */
+static int had_pcm_hw_params(struct snd_pcm_substream *substream,
+			     struct snd_pcm_hw_params *hw_params)
+{
+	struct snd_intelhad *intelhaddata;
+	int buf_size;
+
+	intelhaddata = snd_pcm_substream_chip(substream);
+	buf_size = params_buffer_bytes(hw_params);
+	dev_dbg(intelhaddata->dev, "%s:allocated memory = %d\n",
+		__func__, buf_size);
+	return 0;
+}
+
+/*
+ * ALSA PCM trigger callback
+ */
+static int had_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	int retval = 0;
+	struct snd_intelhad *intelhaddata;
+
+	intelhaddata = snd_pcm_substream_chip(substream);
+
+	spin_lock(&intelhaddata->had_spinlock);
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+	case SNDRV_PCM_TRIGGER_RESUME:
+		/* Enable Audio */
+		had_ack_irqs(intelhaddata); /* FIXME: do we need this? */
+		had_enable_audio(intelhaddata, true);
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		/* Disable Audio */
+		had_enable_audio(intelhaddata, false);
+		break;
+
+	default:
+		retval = -EINVAL;
+	}
+	spin_unlock(&intelhaddata->had_spinlock);
+	return retval;
+}
+
+/*
+ * ALSA PCM prepare callback
+ */
+static int had_pcm_prepare(struct snd_pcm_substream *substream)
+{
+	int retval;
+	u32 disp_samp_freq, n_param;
+	u32 link_rate = 0;
+	struct snd_intelhad *intelhaddata;
+	struct snd_pcm_runtime *runtime;
+
+	intelhaddata = snd_pcm_substream_chip(substream);
+	runtime = substream->runtime;
+
+	dev_dbg(intelhaddata->dev, "period_size=%d\n",
+		(int)frames_to_bytes(runtime, runtime->period_size));
+	dev_dbg(intelhaddata->dev, "periods=%d\n", runtime->periods);
+	dev_dbg(intelhaddata->dev, "buffer_size=%d\n",
+		(int)snd_pcm_lib_buffer_bytes(substream));
+	dev_dbg(intelhaddata->dev, "rate=%d\n", runtime->rate);
+	dev_dbg(intelhaddata->dev, "channels=%d\n", runtime->channels);
+
+	/* Get N value in KHz */
+	disp_samp_freq = intelhaddata->tmds_clock_speed;
+
+	retval = had_prog_n(substream->runtime->rate, &n_param, intelhaddata);
+	if (retval) {
+		dev_err(intelhaddata->dev,
+			"programming N value failed %#x\n", retval);
+		goto prep_end;
+	}
+
+	if (intelhaddata->dp_output)
+		link_rate = intelhaddata->link_rate;
+
+	had_prog_cts(substream->runtime->rate, disp_samp_freq, link_rate,
+		     n_param, intelhaddata);
+
+	had_prog_dip(substream, intelhaddata);
+
+	retval = had_init_audio_ctrl(substream, intelhaddata);
+
+	/* Prog buffer address */
+	had_init_ringbuf(substream, intelhaddata);
+
+	/*
+	 * Program channel mapping in following order:
+	 * FL, FR, C, LFE, RL, RR
+	 */
+
+	had_write_register(intelhaddata, AUD_BUF_CH_SWAP, SWAP_LFE_CENTER);
+
+prep_end:
+	return retval;
+}
+
+/*
+ * ALSA PCM pointer callback
+ */
+static snd_pcm_uframes_t had_pcm_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_intelhad *intelhaddata;
+	int len;
+
+	intelhaddata = snd_pcm_substream_chip(substream);
+
+	if (!intelhaddata->connected)
+		return SNDRV_PCM_POS_XRUN;
+
+	len = had_process_ringbuf(substream, intelhaddata);
+	if (len < 0)
+		return SNDRV_PCM_POS_XRUN;
+	len = bytes_to_frames(substream->runtime, len);
+	/* wrapping may happen when periods=1 */
+	len %= substream->runtime->buffer_size;
+	return len;
+}
+
+/*
+ * ALSA PCM ops
+ */
+static const struct snd_pcm_ops had_pcm_ops = {
+	.open =		had_pcm_open,
+	.close =	had_pcm_close,
+	.hw_params =	had_pcm_hw_params,
+	.prepare =	had_pcm_prepare,
+	.trigger =	had_pcm_trigger,
+	.sync_stop =	had_pcm_sync_stop,
+	.pointer =	had_pcm_pointer,
+};
+
+/* process mode change of the running stream; called in mutex */
+static int had_process_mode_change(struct snd_intelhad *intelhaddata)
+{
+	struct snd_pcm_substream *substream;
+	int retval = 0;
+	u32 disp_samp_freq, n_param;
+	u32 link_rate = 0;
+
+	substream = had_substream_get(intelhaddata);
+	if (!substream)
+		return 0;
+
+	/* Disable Audio */
+	had_enable_audio(intelhaddata, false);
+
+	/* Update CTS value */
+	disp_samp_freq = intelhaddata->tmds_clock_speed;
+
+	retval = had_prog_n(substream->runtime->rate, &n_param, intelhaddata);
+	if (retval) {
+		dev_err(intelhaddata->dev,
+			"programming N value failed %#x\n", retval);
+		goto out;
+	}
+
+	if (intelhaddata->dp_output)
+		link_rate = intelhaddata->link_rate;
+
+	had_prog_cts(substream->runtime->rate, disp_samp_freq, link_rate,
+		     n_param, intelhaddata);
+
+	/* Enable Audio */
+	had_enable_audio(intelhaddata, true);
+
+out:
+	had_substream_put(intelhaddata);
+	return retval;
+}
+
+/* process hot plug, called from wq with mutex locked */
+static void had_process_hot_plug(struct snd_intelhad *intelhaddata)
+{
+	struct snd_pcm_substream *substream;
+
+	spin_lock_irq(&intelhaddata->had_spinlock);
+	if (intelhaddata->connected) {
+		dev_dbg(intelhaddata->dev, "Device already connected\n");
+		spin_unlock_irq(&intelhaddata->had_spinlock);
+		return;
+	}
+
+	/* Disable Audio */
+	had_enable_audio(intelhaddata, false);
+
+	intelhaddata->connected = true;
+	dev_dbg(intelhaddata->dev,
+		"%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_CONNECTED\n",
+			__func__, __LINE__);
+	spin_unlock_irq(&intelhaddata->had_spinlock);
+
+	had_build_channel_allocation_map(intelhaddata);
+
+	/* Report to above ALSA layer */
+	substream = had_substream_get(intelhaddata);
+	if (substream) {
+		snd_pcm_stop_xrun(substream);
+		had_substream_put(intelhaddata);
+	}
+
+	snd_jack_report(intelhaddata->jack, SND_JACK_AVOUT);
+}
+
+/* process hot unplug, called from wq with mutex locked */
+static void had_process_hot_unplug(struct snd_intelhad *intelhaddata)
+{
+	struct snd_pcm_substream *substream;
+
+	spin_lock_irq(&intelhaddata->had_spinlock);
+	if (!intelhaddata->connected) {
+		dev_dbg(intelhaddata->dev, "Device already disconnected\n");
+		spin_unlock_irq(&intelhaddata->had_spinlock);
+		return;
+
+	}
+
+	/* Disable Audio */
+	had_enable_audio(intelhaddata, false);
+
+	intelhaddata->connected = false;
+	dev_dbg(intelhaddata->dev,
+		"%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_DISCONNECTED\n",
+			__func__, __LINE__);
+	spin_unlock_irq(&intelhaddata->had_spinlock);
+
+	kfree(intelhaddata->chmap->chmap);
+	intelhaddata->chmap->chmap = NULL;
+
+	/* Report to above ALSA layer */
+	substream = had_substream_get(intelhaddata);
+	if (substream) {
+		snd_pcm_stop_xrun(substream);
+		had_substream_put(intelhaddata);
+	}
+
+	snd_jack_report(intelhaddata->jack, 0);
+}
+
+/*
+ * ALSA iec958 and ELD controls
+ */
+
+static int had_iec958_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 had_iec958_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_intelhad *intelhaddata = snd_kcontrol_chip(kcontrol);
+
+	mutex_lock(&intelhaddata->mutex);
+	ucontrol->value.iec958.status[0] = (intelhaddata->aes_bits >> 0) & 0xff;
+	ucontrol->value.iec958.status[1] = (intelhaddata->aes_bits >> 8) & 0xff;
+	ucontrol->value.iec958.status[2] =
+					(intelhaddata->aes_bits >> 16) & 0xff;
+	ucontrol->value.iec958.status[3] =
+					(intelhaddata->aes_bits >> 24) & 0xff;
+	mutex_unlock(&intelhaddata->mutex);
+	return 0;
+}
+
+static int had_iec958_mask_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	ucontrol->value.iec958.status[0] = 0xff;
+	ucontrol->value.iec958.status[1] = 0xff;
+	ucontrol->value.iec958.status[2] = 0xff;
+	ucontrol->value.iec958.status[3] = 0xff;
+	return 0;
+}
+
+static int had_iec958_put(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	unsigned int val;
+	struct snd_intelhad *intelhaddata = snd_kcontrol_chip(kcontrol);
+	int changed = 0;
+
+	val = (ucontrol->value.iec958.status[0] << 0) |
+		(ucontrol->value.iec958.status[1] << 8) |
+		(ucontrol->value.iec958.status[2] << 16) |
+		(ucontrol->value.iec958.status[3] << 24);
+	mutex_lock(&intelhaddata->mutex);
+	if (intelhaddata->aes_bits != val) {
+		intelhaddata->aes_bits = val;
+		changed = 1;
+	}
+	mutex_unlock(&intelhaddata->mutex);
+	return changed;
+}
+
+static int had_ctl_eld_info(struct snd_kcontrol *kcontrol,
+			    struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
+	uinfo->count = HDMI_MAX_ELD_BYTES;
+	return 0;
+}
+
+static int had_ctl_eld_get(struct snd_kcontrol *kcontrol,
+			   struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_intelhad *intelhaddata = snd_kcontrol_chip(kcontrol);
+
+	mutex_lock(&intelhaddata->mutex);
+	memcpy(ucontrol->value.bytes.data, intelhaddata->eld,
+	       HDMI_MAX_ELD_BYTES);
+	mutex_unlock(&intelhaddata->mutex);
+	return 0;
+}
+
+static const struct snd_kcontrol_new had_controls[] = {
+	{
+		.access = SNDRV_CTL_ELEM_ACCESS_READ,
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
+		.info = had_iec958_info, /* shared */
+		.get = had_iec958_mask_get,
+	},
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
+		.info = had_iec958_info,
+		.get = had_iec958_get,
+		.put = had_iec958_put,
+	},
+	{
+		.access = (SNDRV_CTL_ELEM_ACCESS_READ |
+			   SNDRV_CTL_ELEM_ACCESS_VOLATILE),
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = "ELD",
+		.info = had_ctl_eld_info,
+		.get = had_ctl_eld_get,
+	},
+};
+
+/*
+ * audio interrupt handler
+ */
+static irqreturn_t display_pipe_interrupt_handler(int irq, void *dev_id)
+{
+	struct snd_intelhad_card *card_ctx = dev_id;
+	u32 audio_stat[3] = {};
+	int pipe, port;
+
+	for_each_pipe(card_ctx, pipe) {
+		/* use raw register access to ack IRQs even while disconnected */
+		audio_stat[pipe] = had_read_register_raw(card_ctx, pipe,
+							 AUD_HDMI_STATUS) &
+			(HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE);
+
+		if (audio_stat[pipe])
+			had_write_register_raw(card_ctx, pipe,
+					       AUD_HDMI_STATUS, audio_stat[pipe]);
+	}
+
+	for_each_port(card_ctx, port) {
+		struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port];
+		int pipe = ctx->pipe;
+
+		if (pipe < 0)
+			continue;
+
+		if (audio_stat[pipe] & HDMI_AUDIO_BUFFER_DONE)
+			had_process_buffer_done(ctx);
+		if (audio_stat[pipe] & HDMI_AUDIO_UNDERRUN)
+			had_process_buffer_underrun(ctx);
+	}
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * monitor plug/unplug notification from i915; just kick off the work
+ */
+static void notify_audio_lpe(struct platform_device *pdev, int port)
+{
+	struct snd_intelhad_card *card_ctx = platform_get_drvdata(pdev);
+	struct snd_intelhad *ctx;
+
+	ctx = &card_ctx->pcm_ctx[single_port ? 0 : port];
+	if (single_port)
+		ctx->port = port;
+
+	schedule_work(&ctx->hdmi_audio_wq);
+}
+
+/* the work to handle monitor hot plug/unplug */
+static void had_audio_wq(struct work_struct *work)
+{
+	struct snd_intelhad *ctx =
+		container_of(work, struct snd_intelhad, hdmi_audio_wq);
+	struct intel_hdmi_lpe_audio_pdata *pdata = ctx->dev->platform_data;
+	struct intel_hdmi_lpe_audio_port_pdata *ppdata = &pdata->port[ctx->port];
+	int ret;
+
+	ret = pm_runtime_resume_and_get(ctx->dev);
+	if (ret < 0)
+		return;
+
+	mutex_lock(&ctx->mutex);
+	if (ppdata->pipe < 0) {
+		dev_dbg(ctx->dev, "%s: Event: HAD_NOTIFY_HOT_UNPLUG : port = %d\n",
+			__func__, ctx->port);
+
+		memset(ctx->eld, 0, sizeof(ctx->eld)); /* clear the old ELD */
+
+		ctx->dp_output = false;
+		ctx->tmds_clock_speed = 0;
+		ctx->link_rate = 0;
+
+		/* Shut down the stream */
+		had_process_hot_unplug(ctx);
+
+		ctx->pipe = -1;
+	} else {
+		dev_dbg(ctx->dev, "%s: HAD_NOTIFY_ELD : port = %d, tmds = %d\n",
+			__func__, ctx->port, ppdata->ls_clock);
+
+		memcpy(ctx->eld, ppdata->eld, sizeof(ctx->eld));
+
+		ctx->dp_output = ppdata->dp_output;
+		if (ctx->dp_output) {
+			ctx->tmds_clock_speed = 0;
+			ctx->link_rate = ppdata->ls_clock;
+		} else {
+			ctx->tmds_clock_speed = ppdata->ls_clock;
+			ctx->link_rate = 0;
+		}
+
+		/*
+		 * Shut down the stream before we change
+		 * the pipe assignment for this pcm device
+		 */
+		had_process_hot_plug(ctx);
+
+		ctx->pipe = ppdata->pipe;
+
+		/* Restart the stream if necessary */
+		had_process_mode_change(ctx);
+	}
+
+	mutex_unlock(&ctx->mutex);
+	pm_runtime_mark_last_busy(ctx->dev);
+	pm_runtime_put_autosuspend(ctx->dev);
+}
+
+/*
+ * Jack interface
+ */
+static int had_create_jack(struct snd_intelhad *ctx,
+			   struct snd_pcm *pcm)
+{
+	char hdmi_str[32];
+	int err;
+
+	snprintf(hdmi_str, sizeof(hdmi_str),
+		 "HDMI/DP,pcm=%d", pcm->device);
+
+	err = snd_jack_new(ctx->card_ctx->card, hdmi_str,
+			   SND_JACK_AVOUT, &ctx->jack,
+			   true, false);
+	if (err < 0)
+		return err;
+	ctx->jack->private_data = ctx;
+	return 0;
+}
+
+/*
+ * PM callbacks
+ */
+
+static int __maybe_unused hdmi_lpe_audio_suspend(struct device *dev)
+{
+	struct snd_intelhad_card *card_ctx = dev_get_drvdata(dev);
+
+	snd_power_change_state(card_ctx->card, SNDRV_CTL_POWER_D3hot);
+
+	return 0;
+}
+
+static int __maybe_unused hdmi_lpe_audio_resume(struct device *dev)
+{
+	struct snd_intelhad_card *card_ctx = dev_get_drvdata(dev);
+
+	pm_runtime_mark_last_busy(dev);
+
+	snd_power_change_state(card_ctx->card, SNDRV_CTL_POWER_D0);
+
+	return 0;
+}
+
+/* release resources */
+static void hdmi_lpe_audio_free(struct snd_card *card)
+{
+	struct snd_intelhad_card *card_ctx = card->private_data;
+	struct intel_hdmi_lpe_audio_pdata *pdata = card_ctx->dev->platform_data;
+	int port;
+
+	spin_lock_irq(&pdata->lpe_audio_slock);
+	pdata->notify_audio_lpe = NULL;
+	spin_unlock_irq(&pdata->lpe_audio_slock);
+
+	for_each_port(card_ctx, port) {
+		struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port];
+
+		cancel_work_sync(&ctx->hdmi_audio_wq);
+	}
+}
+
+/*
+ * hdmi_lpe_audio_probe - start bridge with i915
+ *
+ * This function is called when the i915 driver creates the
+ * hdmi-lpe-audio platform device.
+ */
+static int __hdmi_lpe_audio_probe(struct platform_device *pdev)
+{
+	struct snd_card *card;
+	struct snd_intelhad_card *card_ctx;
+	struct snd_intelhad *ctx;
+	struct snd_pcm *pcm;
+	struct intel_hdmi_lpe_audio_pdata *pdata;
+	int irq;
+	struct resource *res_mmio;
+	int port, ret;
+
+	pdata = pdev->dev.platform_data;
+	if (!pdata) {
+		dev_err(&pdev->dev, "%s: quit: pdata not allocated by i915!!\n", __func__);
+		return -EINVAL;
+	}
+
+	/* get resources */
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	res_mmio = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res_mmio) {
+		dev_err(&pdev->dev, "Could not get IO_MEM resources\n");
+		return -ENXIO;
+	}
+
+	/* create a card instance with ALSA framework */
+	ret = snd_devm_card_new(&pdev->dev, hdmi_card_index, hdmi_card_id,
+				THIS_MODULE, sizeof(*card_ctx), &card);
+	if (ret)
+		return ret;
+
+	card_ctx = card->private_data;
+	card_ctx->dev = &pdev->dev;
+	card_ctx->card = card;
+	strcpy(card->driver, INTEL_HAD);
+	strcpy(card->shortname, "Intel HDMI/DP LPE Audio");
+	strcpy(card->longname, "Intel HDMI/DP LPE Audio");
+
+	card_ctx->irq = -1;
+
+	card->private_free = hdmi_lpe_audio_free;
+
+	platform_set_drvdata(pdev, card_ctx);
+
+	card_ctx->num_pipes = pdata->num_pipes;
+	card_ctx->num_ports = single_port ? 1 : pdata->num_ports;
+
+	for_each_port(card_ctx, port) {
+		ctx = &card_ctx->pcm_ctx[port];
+		ctx->card_ctx = card_ctx;
+		ctx->dev = card_ctx->dev;
+		ctx->port = single_port ? -1 : port;
+		ctx->pipe = -1;
+
+		spin_lock_init(&ctx->had_spinlock);
+		mutex_init(&ctx->mutex);
+		INIT_WORK(&ctx->hdmi_audio_wq, had_audio_wq);
+	}
+
+	dev_dbg(&pdev->dev, "%s: mmio_start = 0x%x, mmio_end = 0x%x\n",
+		__func__, (unsigned int)res_mmio->start,
+		(unsigned int)res_mmio->end);
+
+	card_ctx->mmio_start =
+		devm_ioremap(&pdev->dev, res_mmio->start,
+			     (size_t)(resource_size(res_mmio)));
+	if (!card_ctx->mmio_start) {
+		dev_err(&pdev->dev, "Could not get ioremap\n");
+		return -EACCES;
+	}
+
+	/* setup interrupt handler */
+	ret = devm_request_irq(&pdev->dev, irq, display_pipe_interrupt_handler,
+			       0, pdev->name, card_ctx);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "request_irq failed\n");
+		return ret;
+	}
+
+	card_ctx->irq = irq;
+
+	/* only 32bit addressable */
+	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
+
+	init_channel_allocations();
+
+	card_ctx->num_pipes = pdata->num_pipes;
+	card_ctx->num_ports = single_port ? 1 : pdata->num_ports;
+
+	for_each_port(card_ctx, port) {
+		int i;
+
+		ctx = &card_ctx->pcm_ctx[port];
+		ret = snd_pcm_new(card, INTEL_HAD, port, MAX_PB_STREAMS,
+				  MAX_CAP_STREAMS, &pcm);
+		if (ret)
+			return ret;
+
+		/* setup private data which can be retrieved when required */
+		pcm->private_data = ctx;
+		pcm->info_flags = 0;
+		strscpy(pcm->name, card->shortname, strlen(card->shortname));
+		/* setup the ops for playback */
+		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &had_pcm_ops);
+
+		/* allocate dma pages;
+		 * try to allocate 600k buffer as default which is large enough
+		 */
+		snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_WC,
+					       card->dev, HAD_DEFAULT_BUFFER,
+					       HAD_MAX_BUFFER);
+
+		/* create controls */
+		for (i = 0; i < ARRAY_SIZE(had_controls); i++) {
+			struct snd_kcontrol *kctl;
+
+			kctl = snd_ctl_new1(&had_controls[i], ctx);
+			if (!kctl)
+				return -ENOMEM;
+
+			kctl->id.device = pcm->device;
+
+			ret = snd_ctl_add(card, kctl);
+			if (ret < 0)
+				return ret;
+		}
+
+		/* Register channel map controls */
+		ret = had_register_chmap_ctls(ctx, pcm);
+		if (ret < 0)
+			return ret;
+
+		ret = had_create_jack(ctx, pcm);
+		if (ret < 0)
+			return ret;
+	}
+
+	ret = snd_card_register(card);
+	if (ret)
+		return ret;
+
+	spin_lock_irq(&pdata->lpe_audio_slock);
+	pdata->notify_audio_lpe = notify_audio_lpe;
+	spin_unlock_irq(&pdata->lpe_audio_slock);
+
+	pm_runtime_set_autosuspend_delay(&pdev->dev, INTEL_HDMI_AUDIO_SUSPEND_DELAY_MS);
+	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+	pm_runtime_mark_last_busy(&pdev->dev);
+	pm_runtime_idle(&pdev->dev);
+
+	dev_dbg(&pdev->dev, "%s: handle pending notification\n", __func__);
+	for_each_port(card_ctx, port) {
+		struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port];
+
+		schedule_work(&ctx->hdmi_audio_wq);
+	}
+
+	return 0;
+}
+
+static int hdmi_lpe_audio_probe(struct platform_device *pdev)
+{
+	return snd_card_free_on_error(&pdev->dev, __hdmi_lpe_audio_probe(pdev));
+}
+
+static const struct dev_pm_ops hdmi_lpe_audio_pm = {
+	SET_SYSTEM_SLEEP_PM_OPS(hdmi_lpe_audio_suspend, hdmi_lpe_audio_resume)
+};
+
+static struct platform_driver hdmi_lpe_audio_driver = {
+	.driver		= {
+		.name  = "hdmi-lpe-audio",
+		.pm = &hdmi_lpe_audio_pm,
+	},
+	.probe          = hdmi_lpe_audio_probe,
+};
+
+module_platform_driver(hdmi_lpe_audio_driver);
+MODULE_ALIAS("platform:hdmi_lpe_audio");
+
+MODULE_AUTHOR("Sailaja Bandarupalli <sailaja.bandarupalli@intel.com>");
+MODULE_AUTHOR("Ramesh Babu K V <ramesh.babu@intel.com>");
+MODULE_AUTHOR("Vaibhav Agarwal <vaibhav.agarwal@intel.com>");
+MODULE_AUTHOR("Jerome Anand <jerome.anand@intel.com>");
+MODULE_DESCRIPTION("Intel HDMI Audio driver");
+MODULE_LICENSE("GPL v2");