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-rw-r--r--sound/x86/Kconfig17
-rw-r--r--sound/x86/Makefile4
-rw-r--r--sound/x86/intel_hdmi_audio.c1955
-rw-r--r--sound/x86/intel_hdmi_audio.h146
-rw-r--r--sound/x86/intel_hdmi_lpe_audio.h328
5 files changed, 2450 insertions, 0 deletions
diff --git a/sound/x86/Kconfig b/sound/x86/Kconfig
new file mode 100644
index 000000000..8adf4d1bd
--- /dev/null
+++ b/sound/x86/Kconfig
@@ -0,0 +1,17 @@
+menuconfig SND_X86
+ bool "X86 sound devices"
+ depends on X86
+ default y
+ ---help---
+ X86 sound devices that don't fall under SoC or PCI categories
+
+if SND_X86
+
+config HDMI_LPE_AUDIO
+ tristate "HDMI audio without HDaudio on Intel Atom platforms"
+ depends on DRM_I915
+ select SND_PCM
+ help
+ Choose this option to support HDMI LPE Audio mode
+
+endif # SND_X86
diff --git a/sound/x86/Makefile b/sound/x86/Makefile
new file mode 100644
index 000000000..7ff919808
--- /dev/null
+++ b/sound/x86/Makefile
@@ -0,0 +1,4 @@
+snd-hdmi-lpe-audio-objs += \
+ intel_hdmi_audio.o
+
+obj-$(CONFIG_HDMI_LPE_AUDIO) += snd-hdmi-lpe-audio.o
diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c
new file mode 100644
index 000000000..3841336dc
--- /dev/null
+++ b/sound/x86/intel_hdmi_audio.c
@@ -0,0 +1,1955 @@
+/*
+ * 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>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * 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 <asm/set_memory.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 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 regiter 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 confgiuration 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 but only when need_reset is set;
+ * 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 void had_do_reset(struct snd_intelhad *intelhaddata)
+{
+ if (!intelhaddata->need_reset || !intelhaddata->connected)
+ return;
+
+ /* Reset buffer pointers */
+ had_reset_audio(intelhaddata);
+ wait_clear_underrun_bit(intelhaddata);
+ intelhaddata->need_reset = false;
+}
+
+/* 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);
+ }
+ intelhaddata->need_reset = true;
+}
+
+/*
+ * 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;
+
+ pm_runtime_get_sync(intelhaddata->dev);
+
+ /* 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;
+ unsigned long addr;
+ int pages, buf_size, retval;
+
+ intelhaddata = snd_pcm_substream_chip(substream);
+ buf_size = params_buffer_bytes(hw_params);
+ retval = snd_pcm_lib_malloc_pages(substream, buf_size);
+ if (retval < 0)
+ return retval;
+ dev_dbg(intelhaddata->dev, "%s:allocated memory = %d\n",
+ __func__, buf_size);
+ /* mark the pages as uncached region */
+ addr = (unsigned long) substream->runtime->dma_area;
+ pages = (substream->runtime->dma_bytes + PAGE_SIZE - 1) / PAGE_SIZE;
+ retval = set_memory_uc(addr, pages);
+ if (retval) {
+ dev_err(intelhaddata->dev, "set_memory_uc failed.Error:%d\n",
+ retval);
+ return retval;
+ }
+ memset(substream->runtime->dma_area, 0, buf_size);
+
+ return retval;
+}
+
+/*
+ * ALSA PCM hw_free callback
+ */
+static int had_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ struct snd_intelhad *intelhaddata;
+ unsigned long addr;
+ u32 pages;
+
+ intelhaddata = snd_pcm_substream_chip(substream);
+ had_do_reset(intelhaddata);
+
+ /* mark back the pages as cached/writeback region before the free */
+ if (substream->runtime->dma_area != NULL) {
+ addr = (unsigned long) substream->runtime->dma_area;
+ pages = (substream->runtime->dma_bytes + PAGE_SIZE - 1) /
+ PAGE_SIZE;
+ set_memory_wb(addr, pages);
+ return snd_pcm_lib_free_pages(substream);
+ }
+ 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);
+ intelhaddata->need_reset = true;
+ 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);
+
+ had_do_reset(intelhaddata);
+
+ /* 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 mmap callback
+ */
+static int had_pcm_mmap(struct snd_pcm_substream *substream,
+ struct vm_area_struct *vma)
+{
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ return remap_pfn_range(vma, vma->vm_start,
+ substream->runtime->dma_addr >> PAGE_SHIFT,
+ vma->vm_end - vma->vm_start, vma->vm_page_prot);
+}
+
+/*
+ * ALSA PCM ops
+ */
+static const struct snd_pcm_ops had_pcm_ops = {
+ .open = had_pcm_open,
+ .close = had_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = had_pcm_hw_params,
+ .hw_free = had_pcm_hw_free,
+ .prepare = had_pcm_prepare,
+ .trigger = had_pcm_trigger,
+ .pointer = had_pcm_pointer,
+ .mmap = had_pcm_mmap,
+};
+
+/* 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];
+
+ pm_runtime_get_sync(ctx->dev);
+ 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 hdmi_lpe_audio_runtime_suspend(struct device *dev)
+{
+ struct snd_intelhad_card *card_ctx = dev_get_drvdata(dev);
+ int port;
+
+ for_each_port(card_ctx, port) {
+ struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port];
+ struct snd_pcm_substream *substream;
+
+ substream = had_substream_get(ctx);
+ if (substream) {
+ snd_pcm_suspend(substream);
+ had_substream_put(ctx);
+ }
+ }
+
+ return 0;
+}
+
+static int __maybe_unused hdmi_lpe_audio_suspend(struct device *dev)
+{
+ struct snd_intelhad_card *card_ctx = dev_get_drvdata(dev);
+ int err;
+
+ err = hdmi_lpe_audio_runtime_suspend(dev);
+ if (!err)
+ snd_power_change_state(card_ctx->card, SNDRV_CTL_POWER_D3hot);
+ return err;
+}
+
+static int hdmi_lpe_audio_runtime_resume(struct device *dev)
+{
+ pm_runtime_mark_last_busy(dev);
+ return 0;
+}
+
+static int __maybe_unused hdmi_lpe_audio_resume(struct device *dev)
+{
+ struct snd_intelhad_card *card_ctx = dev_get_drvdata(dev);
+
+ hdmi_lpe_audio_runtime_resume(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);
+ }
+
+ if (card_ctx->mmio_start)
+ iounmap(card_ctx->mmio_start);
+ if (card_ctx->irq >= 0)
+ free_irq(card_ctx->irq, card_ctx);
+}
+
+/*
+ * 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) {
+ dev_err(&pdev->dev, "Could not get irq resource: %d\n", irq);
+ 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_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 = ioremap_nocache(res_mmio->start,
+ (size_t)(resource_size(res_mmio)));
+ if (!card_ctx->mmio_start) {
+ dev_err(&pdev->dev, "Could not get ioremap\n");
+ ret = -EACCES;
+ goto err;
+ }
+
+ /* setup interrupt handler */
+ ret = request_irq(irq, display_pipe_interrupt_handler, 0,
+ pdev->name, card_ctx);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "request_irq failed\n");
+ goto err;
+ }
+
+ card_ctx->irq = irq;
+
+ /* only 32bit addressable */
+ dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+ dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+
+ 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)
+ goto err;
+
+ /* setup private data which can be retrieved when required */
+ pcm->private_data = ctx;
+ pcm->info_flags = 0;
+ strlcpy(pcm->name, card->shortname, strlen(card->shortname));
+ /* setup the ops for playabck */
+ 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_lib_preallocate_pages_for_all(pcm,
+ SNDRV_DMA_TYPE_DEV, NULL,
+ 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) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ kctl->id.device = pcm->device;
+
+ ret = snd_ctl_add(card, kctl);
+ if (ret < 0)
+ goto err;
+ }
+
+ /* Register channel map controls */
+ ret = had_register_chmap_ctls(ctx, pcm);
+ if (ret < 0)
+ goto err;
+
+ ret = had_create_jack(ctx, pcm);
+ if (ret < 0)
+ goto err;
+ }
+
+ ret = snd_card_register(card);
+ if (ret)
+ goto err;
+
+ spin_lock_irq(&pdata->lpe_audio_slock);
+ pdata->notify_audio_lpe = notify_audio_lpe;
+ spin_unlock_irq(&pdata->lpe_audio_slock);
+
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_mark_last_busy(&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;
+
+err:
+ snd_card_free(card);
+ return ret;
+}
+
+/*
+ * hdmi_lpe_audio_remove - stop bridge with i915
+ *
+ * This function is called when the platform device is destroyed.
+ */
+static int hdmi_lpe_audio_remove(struct platform_device *pdev)
+{
+ struct snd_intelhad_card *card_ctx = platform_get_drvdata(pdev);
+
+ snd_card_free(card_ctx->card);
+ return 0;
+}
+
+static const struct dev_pm_ops hdmi_lpe_audio_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(hdmi_lpe_audio_suspend, hdmi_lpe_audio_resume)
+ SET_RUNTIME_PM_OPS(hdmi_lpe_audio_runtime_suspend,
+ hdmi_lpe_audio_runtime_resume, NULL)
+};
+
+static struct platform_driver hdmi_lpe_audio_driver = {
+ .driver = {
+ .name = "hdmi-lpe-audio",
+ .pm = &hdmi_lpe_audio_pm,
+ },
+ .probe = hdmi_lpe_audio_probe,
+ .remove = hdmi_lpe_audio_remove,
+};
+
+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");
+MODULE_SUPPORTED_DEVICE("{Intel,Intel_HAD}");
diff --git a/sound/x86/intel_hdmi_audio.h b/sound/x86/intel_hdmi_audio.h
new file mode 100644
index 000000000..0d91bb5db
--- /dev/null
+++ b/sound/x86/intel_hdmi_audio.h
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2016 Intel Corporation
+ * 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>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _INTEL_HDMI_AUDIO_H_
+#define _INTEL_HDMI_AUDIO_H_
+
+#include "intel_hdmi_lpe_audio.h"
+
+#define MAX_PB_STREAMS 1
+#define MAX_CAP_STREAMS 0
+#define BYTES_PER_WORD 0x4
+#define INTEL_HAD "HdmiLpeAudio"
+
+/*
+ * CEA speaker placement:
+ *
+ * FL FLC FC FRC FR
+ *
+ * LFE
+ *
+ * RL RLC RC RRC RR
+ *
+ * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M
+ * corresponds to CEA RL/RR; The SMPTE channel _assignment_ C/LFE is
+ * swapped to CEA LFE/FC.
+ */
+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 */
+};
+
+struct cea_channel_speaker_allocation {
+ int ca_index;
+ int speakers[8];
+
+ /* derived values, just for convenience */
+ int channels;
+ int spk_mask;
+};
+
+struct channel_map_table {
+ unsigned char map; /* ALSA API channel map position */
+ unsigned char cea_slot; /* CEA slot value */
+ int spk_mask; /* speaker position bit mask */
+};
+
+struct pcm_stream_info {
+ struct snd_pcm_substream *substream;
+ int substream_refcount;
+};
+
+/*
+ * struct snd_intelhad - intelhad driver structure
+ *
+ * @card: ptr to hold card details
+ * @connected: the monitor connection status
+ * @stream_info: stream information
+ * @eld: holds ELD info
+ * @curr_buf: pointer to hold current active ring buf
+ * @valid_buf_cnt: ring buffer count for stream
+ * @had_spinlock: driver lock
+ * @aes_bits: IEC958 status bits
+ * @buff_done: id of current buffer done intr
+ * @dev: platoform device handle
+ * @chmap: holds channel map info
+ */
+struct snd_intelhad {
+ struct snd_intelhad_card *card_ctx;
+ bool connected;
+ struct pcm_stream_info stream_info;
+ unsigned char eld[HDMI_MAX_ELD_BYTES];
+ bool dp_output;
+ unsigned int aes_bits;
+ spinlock_t had_spinlock;
+ struct device *dev;
+ struct snd_pcm_chmap *chmap;
+ int tmds_clock_speed;
+ int link_rate;
+ int port; /* fixed */
+ int pipe; /* can change dynamically */
+
+ /* ring buffer (BD) position index */
+ unsigned int bd_head;
+ /* PCM buffer position indices */
+ unsigned int pcmbuf_head; /* being processed */
+ unsigned int pcmbuf_filled; /* to be filled */
+
+ unsigned int num_bds; /* number of BDs */
+ unsigned int period_bytes; /* PCM period size in bytes */
+
+ /* internal stuff */
+ union aud_cfg aud_config; /* AUD_CONFIG reg value cache */
+ struct work_struct hdmi_audio_wq;
+ struct mutex mutex; /* for protecting chmap and eld */
+ bool need_reset;
+ struct snd_jack *jack;
+};
+
+struct snd_intelhad_card {
+ struct snd_card *card;
+ struct device *dev;
+
+ /* internal stuff */
+ int irq;
+ void __iomem *mmio_start;
+ int num_pipes;
+ int num_ports;
+ struct snd_intelhad pcm_ctx[3]; /* one for each port */
+};
+
+#endif /* _INTEL_HDMI_AUDIO_ */
diff --git a/sound/x86/intel_hdmi_lpe_audio.h b/sound/x86/intel_hdmi_lpe_audio.h
new file mode 100644
index 000000000..477e51533
--- /dev/null
+++ b/sound/x86/intel_hdmi_lpe_audio.h
@@ -0,0 +1,328 @@
+/*
+ * intel_hdmi_lpe_audio.h - Intel HDMI LPE 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>
+ * Aravind Siddappaji <aravindx.siddappaji@intel.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; version 2 of the License.
+ *
+ * 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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#ifndef __INTEL_HDMI_LPE_AUDIO_H
+#define __INTEL_HDMI_LPE_AUDIO_H
+
+#define HAD_MIN_CHANNEL 2
+#define HAD_MAX_CHANNEL 8
+#define HAD_NUM_OF_RING_BUFS 4
+
+/* max 20bit address, aligned to 64 */
+#define HAD_MAX_BUFFER ((1024 * 1024 - 1) & ~0x3f)
+#define HAD_DEFAULT_BUFFER (600 * 1024) /* default prealloc size */
+#define HAD_MAX_PERIODS 256 /* arbitrary, but should suffice */
+#define HAD_MIN_PERIODS 1
+#define HAD_MAX_PERIOD_BYTES ((HAD_MAX_BUFFER / HAD_MIN_PERIODS) & ~0x3f)
+#define HAD_MIN_PERIOD_BYTES 1024 /* might be smaller */
+#define HAD_FIFO_SIZE 0 /* fifo not being used */
+#define MAX_SPEAKERS 8
+
+#define AUD_SAMPLE_RATE_32 32000
+#define AUD_SAMPLE_RATE_44_1 44100
+#define AUD_SAMPLE_RATE_48 48000
+#define AUD_SAMPLE_RATE_88_2 88200
+#define AUD_SAMPLE_RATE_96 96000
+#define AUD_SAMPLE_RATE_176_4 176400
+#define AUD_SAMPLE_RATE_192 192000
+
+#define HAD_MIN_RATE AUD_SAMPLE_RATE_32
+#define HAD_MAX_RATE AUD_SAMPLE_RATE_192
+
+#define DIS_SAMPLE_RATE_25_2 25200
+#define DIS_SAMPLE_RATE_27 27000
+#define DIS_SAMPLE_RATE_54 54000
+#define DIS_SAMPLE_RATE_74_25 74250
+#define DIS_SAMPLE_RATE_148_5 148500
+#define HAD_REG_WIDTH 0x08
+#define HAD_MAX_DIP_WORDS 16
+
+/* DP Link Rates */
+#define DP_2_7_GHZ 270000
+#define DP_1_62_GHZ 162000
+
+/* Maud Values */
+#define AUD_SAMPLE_RATE_32_DP_2_7_MAUD_VAL 1988
+#define AUD_SAMPLE_RATE_44_1_DP_2_7_MAUD_VAL 2740
+#define AUD_SAMPLE_RATE_48_DP_2_7_MAUD_VAL 2982
+#define AUD_SAMPLE_RATE_88_2_DP_2_7_MAUD_VAL 5480
+#define AUD_SAMPLE_RATE_96_DP_2_7_MAUD_VAL 5965
+#define AUD_SAMPLE_RATE_176_4_DP_2_7_MAUD_VAL 10961
+#define HAD_MAX_RATE_DP_2_7_MAUD_VAL 11930
+#define AUD_SAMPLE_RATE_32_DP_1_62_MAUD_VAL 3314
+#define AUD_SAMPLE_RATE_44_1_DP_1_62_MAUD_VAL 4567
+#define AUD_SAMPLE_RATE_48_DP_1_62_MAUD_VAL 4971
+#define AUD_SAMPLE_RATE_88_2_DP_1_62_MAUD_VAL 9134
+#define AUD_SAMPLE_RATE_96_DP_1_62_MAUD_VAL 9942
+#define AUD_SAMPLE_RATE_176_4_DP_1_62_MAUD_VAL 18268
+#define HAD_MAX_RATE_DP_1_62_MAUD_VAL 19884
+
+/* Naud Value */
+#define DP_NAUD_VAL 32768
+
+/* HDMI Controller register offsets - audio domain common */
+/* Base address for below regs = 0x65000 */
+enum hdmi_ctrl_reg_offset_common {
+ AUDIO_HDMI_CONFIG_A = 0x000,
+ AUDIO_HDMI_CONFIG_B = 0x800,
+ AUDIO_HDMI_CONFIG_C = 0x900,
+};
+/* HDMI controller register offsets */
+enum hdmi_ctrl_reg_offset {
+ AUD_CONFIG = 0x0,
+ AUD_CH_STATUS_0 = 0x08,
+ AUD_CH_STATUS_1 = 0x0C,
+ AUD_HDMI_CTS = 0x10,
+ AUD_N_ENABLE = 0x14,
+ AUD_SAMPLE_RATE = 0x18,
+ AUD_BUF_CONFIG = 0x20,
+ AUD_BUF_CH_SWAP = 0x24,
+ AUD_BUF_A_ADDR = 0x40,
+ AUD_BUF_A_LENGTH = 0x44,
+ AUD_BUF_B_ADDR = 0x48,
+ AUD_BUF_B_LENGTH = 0x4c,
+ AUD_BUF_C_ADDR = 0x50,
+ AUD_BUF_C_LENGTH = 0x54,
+ AUD_BUF_D_ADDR = 0x58,
+ AUD_BUF_D_LENGTH = 0x5c,
+ AUD_CNTL_ST = 0x60,
+ AUD_HDMI_STATUS = 0x64, /* v2 */
+ AUD_HDMIW_INFOFR = 0x68, /* v2 */
+};
+
+/* Audio configuration */
+union aud_cfg {
+ struct {
+ u32 aud_en:1;
+ u32 layout:1; /* LAYOUT[01], see below */
+ u32 fmt:2;
+ u32 num_ch:3;
+ u32 set:1;
+ u32 flat:1;
+ u32 val_bit:1;
+ u32 user_bit:1;
+ u32 underrun:1; /* 0: send null packets,
+ * 1: send silence stream
+ */
+ u32 packet_mode:1; /* 0: 32bit container, 1: 16bit */
+ u32 left_align:1; /* 0: MSB bits 0-23, 1: bits 8-31 */
+ u32 bogus_sample:1; /* bogus sample for odd channels */
+ u32 dp_modei:1; /* 0: HDMI, 1: DP */
+ u32 rsvd:16;
+ } regx;
+ u32 regval;
+};
+
+#define AUD_CONFIG_VALID_BIT (1 << 9)
+#define AUD_CONFIG_DP_MODE (1 << 15)
+#define AUD_CONFIG_CH_MASK 0x70
+#define LAYOUT0 0 /* interleaved stereo */
+#define LAYOUT1 1 /* for channels > 2 */
+
+/* Audio Channel Status 0 Attributes */
+union aud_ch_status_0 {
+ struct {
+ u32 ch_status:1;
+ u32 lpcm_id:1;
+ u32 cp_info:1;
+ u32 format:3;
+ u32 mode:2;
+ u32 ctg_code:8;
+ u32 src_num:4;
+ u32 ch_num:4;
+ u32 samp_freq:4; /* CH_STATUS_MAP_XXX */
+ u32 clk_acc:2;
+ u32 rsvd:2;
+ } regx;
+ u32 regval;
+};
+
+/* samp_freq values - Sampling rate as per IEC60958 Ver 3 */
+#define CH_STATUS_MAP_32KHZ 0x3
+#define CH_STATUS_MAP_44KHZ 0x0
+#define CH_STATUS_MAP_48KHZ 0x2
+#define CH_STATUS_MAP_88KHZ 0x8
+#define CH_STATUS_MAP_96KHZ 0xA
+#define CH_STATUS_MAP_176KHZ 0xC
+#define CH_STATUS_MAP_192KHZ 0xE
+
+/* Audio Channel Status 1 Attributes */
+union aud_ch_status_1 {
+ struct {
+ u32 max_wrd_len:1;
+ u32 wrd_len:3;
+ u32 rsvd:28;
+ } regx;
+ u32 regval;
+};
+
+#define MAX_SMPL_WIDTH_20 0x0
+#define MAX_SMPL_WIDTH_24 0x1
+#define SMPL_WIDTH_16BITS 0x1
+#define SMPL_WIDTH_24BITS 0x5
+
+/* CTS register */
+union aud_hdmi_cts {
+ struct {
+ u32 cts_val:24;
+ u32 en_cts_prog:1;
+ u32 rsvd:7;
+ } regx;
+ u32 regval;
+};
+
+/* N register */
+union aud_hdmi_n_enable {
+ struct {
+ u32 n_val:24;
+ u32 en_n_prog:1;
+ u32 rsvd:7;
+ } regx;
+ u32 regval;
+};
+
+/* Audio Buffer configurations */
+union aud_buf_config {
+ struct {
+ u32 audio_fifo_watermark:8;
+ u32 dma_fifo_watermark:3;
+ u32 rsvd0:5;
+ u32 aud_delay:8;
+ u32 rsvd1:8;
+ } regx;
+ u32 regval;
+};
+
+#define FIFO_THRESHOLD 0xFE
+#define DMA_FIFO_THRESHOLD 0x7
+
+/* Audio Sample Swapping offset */
+union aud_buf_ch_swap {
+ struct {
+ u32 first_0:3;
+ u32 second_0:3;
+ u32 first_1:3;
+ u32 second_1:3;
+ u32 first_2:3;
+ u32 second_2:3;
+ u32 first_3:3;
+ u32 second_3:3;
+ u32 rsvd:8;
+ } regx;
+ u32 regval;
+};
+
+#define SWAP_LFE_CENTER 0x00fac4c8 /* octal 76543210 */
+
+/* Address for Audio Buffer */
+union aud_buf_addr {
+ struct {
+ u32 valid:1;
+ u32 intr_en:1;
+ u32 rsvd:4;
+ u32 addr:26;
+ } regx;
+ u32 regval;
+};
+
+#define AUD_BUF_VALID (1U << 0)
+#define AUD_BUF_INTR_EN (1U << 1)
+
+/* Length of Audio Buffer */
+union aud_buf_len {
+ struct {
+ u32 buf_len:20;
+ u32 rsvd:12;
+ } regx;
+ u32 regval;
+};
+
+/* Audio Control State Register offset */
+union aud_ctrl_st {
+ struct {
+ u32 ram_addr:4;
+ u32 eld_ack:1;
+ u32 eld_addr:4;
+ u32 eld_buf_size:5;
+ u32 eld_valid:1;
+ u32 cp_ready:1;
+ u32 dip_freq:2;
+ u32 dip_idx:3;
+ u32 dip_en_sta:4;
+ u32 rsvd:7;
+ } regx;
+ u32 regval;
+};
+
+/* Audio HDMI Widget Data Island Packet offset */
+union aud_info_frame1 {
+ struct {
+ u32 pkt_type:8;
+ u32 ver_num:8;
+ u32 len:5;
+ u32 rsvd:11;
+ } regx;
+ u32 regval;
+};
+
+#define HDMI_INFO_FRAME_WORD1 0x000a0184
+#define DP_INFO_FRAME_WORD1 0x00441b84
+
+/* DIP frame 2 */
+union aud_info_frame2 {
+ struct {
+ u32 chksum:8;
+ u32 chnl_cnt:3;
+ u32 rsvd0:1;
+ u32 coding_type:4;
+ u32 smpl_size:2;
+ u32 smpl_freq:3;
+ u32 rsvd1:3;
+ u32 format:8;
+ } regx;
+ u32 regval;
+};
+
+/* DIP frame 3 */
+union aud_info_frame3 {
+ struct {
+ u32 chnl_alloc:8;
+ u32 rsvd0:3;
+ u32 lsv:4;
+ u32 dm_inh:1;
+ u32 rsvd1:16;
+ } regx;
+ u32 regval;
+};
+
+#define VALID_DIP_WORDS 3
+
+/* AUD_HDMI_STATUS bits */
+#define HDMI_AUDIO_UNDERRUN (1U << 31)
+#define HDMI_AUDIO_BUFFER_DONE (1U << 29)
+
+/* AUD_HDMI_STATUS register mask */
+#define AUD_HDMI_STATUS_MASK_UNDERRUN 0xC0000000
+#define AUD_HDMI_STATUS_MASK_SRDBG 0x00000002
+#define AUD_HDMI_STATUSG_MASK_FUNCRST 0x00000001
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 17:43:37 +0000