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openwrt/target/linux/brcm2708/patches-4.4/0315-Revert-bcm2835-implement-channel-map-API.patch
Álvaro Fernández Rojas 20402106a3 brcm2708: update linux 4.4 patches to latest version 
As usual these patches were extracted and rebased from the raspberry pi repo:
https://github.com/raspberrypi/linux/tree/rpi-4.4.y

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2016-07-09 16:29:18 +02:00

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From f830d4081e228776a7236be435921016b3ae1347 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Fri, 29 Apr 2016 17:29:03 +0100
Subject: [PATCH 315/423] Revert "bcm2835: implement channel map API"
This reverts commit 5efba3f8c180c39609a8d40033ef92046ef0de75.
---
sound/arm/bcm2835-ctl.c | 299 ----------------------------------------------
sound/arm/bcm2835-pcm.c | 69 ++---------
sound/arm/bcm2835-vchiq.c | 13 --
sound/arm/bcm2835.h | 4 -
4 files changed, 7 insertions(+), 378 deletions(-)
--- a/sound/arm/bcm2835-ctl.c
+++ b/sound/arm/bcm2835-ctl.c
@@ -327,304 +327,6 @@ static struct snd_kcontrol_new snd_bcm28
},
};
-struct cea_channel_speaker_allocation {
- int ca_index;
- int speakers[8];
-};
-
-#define FL SNDRV_CHMAP_FL
-#define FR SNDRV_CHMAP_FR
-#define RL SNDRV_CHMAP_RL
-#define RR SNDRV_CHMAP_RR
-#define LFE SNDRV_CHMAP_LFE
-#define FC SNDRV_CHMAP_FC
-#define RLC SNDRV_CHMAP_RLC
-#define RRC SNDRV_CHMAP_RRC
-#define RC SNDRV_CHMAP_RC
-#define FLC SNDRV_CHMAP_FLC
-#define FRC SNDRV_CHMAP_FRC
-#define FLH SNDRV_CHMAP_TFL
-#define FRH SNDRV_CHMAP_TFR
-#define FLW SNDRV_CHMAP_FLW
-#define FRW SNDRV_CHMAP_FRW
-#define TC SNDRV_CHMAP_TC
-#define FCH SNDRV_CHMAP_TFC
-
-/*
- * CEA-861 channel maps
- *
- * Stolen from sound/pci/hda/patch_hdmi.c
- * (unlike the source, this uses SNDRV_* constants directly, as by the
- * map_tables array in patch_hdmi.c)
- * Unknown entries use 0, which unfortunately is SNDRV_CHMAP_UNKNOWN instead
- * of SNDRV_CHMAP_NA.
- */
-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 } },
-{ .ca_index = 0x20, .speakers = { 0, FCH, RR, RL, FC, 0, FR, FL } },
-{ .ca_index = 0x21, .speakers = { 0, FCH, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x22, .speakers = { TC, 0, RR, RL, FC, 0, FR, FL } },
-{ .ca_index = 0x23, .speakers = { TC, 0, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x24, .speakers = { FRH, FLH, RR, RL, 0, 0, FR, FL } },
-{ .ca_index = 0x25, .speakers = { FRH, FLH, RR, RL, 0, LFE, FR, FL } },
-{ .ca_index = 0x26, .speakers = { FRW, FLW, RR, RL, 0, 0, FR, FL } },
-{ .ca_index = 0x27, .speakers = { FRW, FLW, RR, RL, 0, LFE, FR, FL } },
-{ .ca_index = 0x28, .speakers = { TC, RC, RR, RL, FC, 0, FR, FL } },
-{ .ca_index = 0x29, .speakers = { TC, RC, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x2a, .speakers = { FCH, RC, RR, RL, FC, 0, FR, FL } },
-{ .ca_index = 0x2b, .speakers = { FCH, RC, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x2c, .speakers = { TC, FCH, RR, RL, FC, 0, FR, FL } },
-{ .ca_index = 0x2d, .speakers = { TC, FCH, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x2e, .speakers = { FRH, FLH, RR, RL, FC, 0, FR, FL } },
-{ .ca_index = 0x2f, .speakers = { FRH, FLH, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x30, .speakers = { FRW, FLW, RR, RL, FC, 0, FR, FL } },
-{ .ca_index = 0x31, .speakers = { FRW, FLW, RR, RL, FC, LFE, FR, FL } },
-};
-
-static int snd_bcm2835_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
- unsigned int size, unsigned int __user *tlv)
-{
- unsigned int __user *dst;
- int count = 0;
- int i;
-
- if (size < 8)
- return -ENOMEM;
- if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
- return -EFAULT;
- size -= 8;
- dst = tlv + 2;
- for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
- struct cea_channel_speaker_allocation *ch = &channel_allocations[i];
- int num_chs = 0;
- int chs_bytes;
- int c;
-
- for (c = 0; c < 8; c++) {
- if (ch->speakers[c])
- num_chs++;
- }
-
- chs_bytes = num_chs * 4;
- if (size < 8)
- return -ENOMEM;
- if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) ||
- put_user(chs_bytes, dst + 1))
- return -EFAULT;
- dst += 2;
- size -= 8;
- count += 8;
- if (size < chs_bytes)
- return -ENOMEM;
- size -= chs_bytes;
- count += chs_bytes;
- for (c = 0; c < 8; c++) {
- int sp = ch->speakers[7 - c];
- if (sp) {
- if (put_user(sp, dst))
- return -EFAULT;
- dst++;
- }
- }
- }
- if (put_user(count, tlv + 1))
- return -EFAULT;
- return 0;
-}
-
-static int snd_bcm2835_chmap_ctl_get(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
- bcm2835_chip_t *chip = info->private_data;
- unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
- struct snd_pcm_substream *substream = snd_pcm_chmap_substream(info, idx);
- struct cea_channel_speaker_allocation *ch = NULL;
- int res = 0;
- int cur = 0;
- int i;
-
- if (mutex_lock_interruptible(&chip->audio_mutex))
- return -EINTR;
-
- if (!substream || !substream->runtime) {
- res = -ENODEV;
- goto unlock;
- }
-
- for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
- if (channel_allocations[i].ca_index == chip->cea_chmap)
- ch = &channel_allocations[i];
- }
-
- /* If no layout was set yet, return a dummy. Apparently the userspace
- * API will be confused if we don't. */
- if (!ch)
- ch = &channel_allocations[0];
-
- for (i = 0; i < 8; i++) {
- if (ch->speakers[7 - i])
- ucontrol->value.integer.value[cur++] = ch->speakers[7 - i];
- }
- while (cur < 8)
- ucontrol->value.integer.value[cur++] = SNDRV_CHMAP_NA;
-
-unlock:
- mutex_unlock(&chip->audio_mutex);
- return res;
-}
-
-static int snd_bcm2835_chmap_ctl_put(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
- bcm2835_chip_t *chip = info->private_data;
- unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
- struct snd_pcm_substream *substream = snd_pcm_chmap_substream(info, idx);
- int i, prepared = 0, cea_chmap = -1;
- int res = 0;
- int remap[8];
-
- if (mutex_lock_interruptible(&chip->audio_mutex))
- return -EINTR;
-
- if (!substream || !substream->runtime) {
- res = -ENODEV;
- goto unlock;
- }
-
- switch (substream->runtime->status->state) {
- case SNDRV_PCM_STATE_OPEN:
- case SNDRV_PCM_STATE_SETUP:
- break;
- case SNDRV_PCM_STATE_PREPARED:
- prepared = 1;
- break;
- default:
- res = -EBUSY;
- goto unlock;
- }
-
- for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
- struct cea_channel_speaker_allocation *ch = &channel_allocations[i];
- int matches = 1;
- int cur = 0;
- int x;
- memset(remap, 0, sizeof(remap));
- for (x = 0; x < substream->runtime->channels; x++) {
- int sp = ucontrol->value.integer.value[x];
- while (cur < 8 && !ch->speakers[7 - cur])
- cur++;
- if (cur >= 8) {
- /* user has more channels than ch */
- matches = 0;
- break;
- }
- if (ch->speakers[7 - cur] != sp) {
- matches = 0;
- break;
- }
- remap[x] = cur;
- cur++;
- }
- for (x = cur; x < 8; x++) {
- if (ch->speakers[7 - x]) {
- /* ch has more channels than user */
- matches = 0;
- break;
- }
- }
- if (matches) {
- cea_chmap = ch->ca_index;
- break;
- }
- }
-
- if (cea_chmap < 0) {
- res = -EINVAL;
- goto unlock;
- }
-
- /* don't change the layout if another substream is active */
- if (chip->opened != (1 << substream->number) && chip->cea_chmap != cea_chmap) {
- res = -EBUSY; /* unsure whether this is a good error code */
- goto unlock;
- }
-
- chip->cea_chmap = cea_chmap;
- for (i = 0; i < 8; i++)
- chip->map_channels[i] = remap[i];
- if (prepared)
- snd_bcm2835_pcm_prepare_again(substream);
-
-unlock:
- mutex_unlock(&chip->audio_mutex);
- return res;
-}
-
-static int snd_bcm2835_add_chmap_ctl(bcm2835_chip_t * chip)
-{
- struct snd_pcm_chmap *chmap;
- struct snd_kcontrol *kctl;
- int err, i;
-
- err = snd_pcm_add_chmap_ctls(chip->pcm,
- SNDRV_PCM_STREAM_PLAYBACK,
- NULL, 8, 0, &chmap);
- if (err < 0)
- return err;
- /* override handlers */
- chmap->private_data = chip;
- kctl = chmap->kctl;
- for (i = 0; i < kctl->count; i++)
- kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE;
- kctl->get = snd_bcm2835_chmap_ctl_get;
- kctl->put = snd_bcm2835_chmap_ctl_put;
- kctl->tlv.c = snd_bcm2835_chmap_ctl_tlv;
- return 0;
-}
-
int snd_bcm2835_new_ctl(bcm2835_chip_t * chip)
{
int err;
@@ -638,7 +340,6 @@ int snd_bcm2835_new_ctl(bcm2835_chip_t *
if (err < 0)
return err;
}
- snd_bcm2835_add_chmap_ctl(chip);
for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_spdif); idx++) {
err = snd_ctl_add(chip->card,
snd_ctl_new1(&snd_bcm2835_spdif[idx], chip));
--- a/sound/arm/bcm2835-pcm.c
+++ b/sound/arm/bcm2835-pcm.c
@@ -19,9 +19,6 @@
#include "bcm2835.h"
-/* The hardware can not do much more num_channels*samplerate then this value */
-#define MAX_COMBINED_RATE 768000
-
/* hardware definition */
static struct snd_pcm_hardware snd_bcm2835_playback_hw = {
.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
@@ -110,31 +107,6 @@ static irqreturn_t bcm2835_playback_fifo
return IRQ_HANDLED;
}
-
-static int rate_hw_constraint_rate(struct snd_pcm_hw_params *params,
- struct snd_pcm_hw_rule *rule)
-{
- struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
- struct snd_interval rates = {
- .min = 8000,
- .max = min(192000u, MAX_COMBINED_RATE / max(channels->min, 1u)),
- };
- struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
- return snd_interval_refine(rate, &rates);
-}
-
-static int rate_hw_constraint_channels(struct snd_pcm_hw_params *params,
- struct snd_pcm_hw_rule *rule)
-{
- struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
- struct snd_interval channels_interval = {
- .min = 1,
- .max = min(8u, MAX_COMBINED_RATE / max(rate->min, 1u)),
- };
- struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
- return snd_interval_refine(channels, &channels_interval);
-}
-
/* open callback */
static int snd_bcm2835_playback_open_generic(
struct snd_pcm_substream *substream, int spdif)
@@ -216,24 +188,8 @@ static int snd_bcm2835_playback_open_gen
snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
16);
- /* When playing PCM, pretend that we support the full range of channels
- * and sample rates. The GPU can't output it, but is able to resample
- * the data to a rate the hardware can handle it. This won't work with
- * compressed data; the resampler would just destroy it. */
- if (spdif) {
- err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
- rate_hw_constraint_rate, NULL,
- SNDRV_PCM_HW_PARAM_CHANNELS, -1);
- err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
- rate_hw_constraint_channels, NULL,
- SNDRV_PCM_HW_PARAM_RATE, -1);
- }
-
chip->alsa_stream[idx] = alsa_stream;
- if (!chip->opened)
- chip->cea_chmap = -1;
-
chip->opened |= (1 << idx);
alsa_stream->open = 1;
alsa_stream->draining = 1;
@@ -344,7 +300,8 @@ static int snd_bcm2835_pcm_hw_free(struc
return snd_pcm_lib_free_pages(substream);
}
-int snd_bcm2835_pcm_prepare_again(struct snd_pcm_substream *substream)
+/* prepare callback */
+static int snd_bcm2835_pcm_prepare(struct snd_pcm_substream *substream)
{
bcm2835_chip_t *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
@@ -352,6 +309,11 @@ int snd_bcm2835_pcm_prepare_again(struct
int channels;
int err;
+ audio_info(" .. IN\n");
+
+ if (mutex_lock_interruptible(&chip->audio_mutex))
+ return -EINTR;
+
/* notify the vchiq that it should enter spdif passthrough mode by
* setting channels=0 (see
* https://github.com/raspberrypi/linux/issues/528) */
@@ -367,23 +329,6 @@ int snd_bcm2835_pcm_prepare_again(struct
audio_error(" error setting hw params\n");
}
- return err;
-}
-
-/* prepare callback */
-static int snd_bcm2835_pcm_prepare(struct snd_pcm_substream *substream)
-{
- bcm2835_chip_t *chip = snd_pcm_substream_chip(substream);
- struct snd_pcm_runtime *runtime = substream->runtime;
- bcm2835_alsa_stream_t *alsa_stream = runtime->private_data;
-
- audio_info(" .. IN\n");
-
- if (mutex_lock_interruptible(&chip->audio_mutex))
- return -EINTR;
-
- snd_bcm2835_pcm_prepare_again(substream);
-
bcm2835_audio_setup(alsa_stream);
/* in preparation of the stream, set the controls (volume level) of the stream */
--- a/sound/arm/bcm2835-vchiq.c
+++ b/sound/arm/bcm2835-vchiq.c
@@ -570,8 +570,6 @@ int bcm2835_audio_set_params(bcm2835_als
VC_AUDIO_MSG_T m;
AUDIO_INSTANCE_T *instance = alsa_stream->instance;
int32_t success;
- uint32_t chmap_value;
- int i;
int ret;
LOG_DBG(" .. IN\n");
@@ -595,21 +593,10 @@ int bcm2835_audio_set_params(bcm2835_als
instance->result = -1;
- if (alsa_stream->chip->cea_chmap >= 0) {
- chmap_value = (unsigned)alsa_stream->chip->cea_chmap << 24;
- } else {
- chmap_value = 0; /* force stereo */
- for (i = 0; i < 8; i++)
- alsa_stream->chip->map_channels[i] = i;
- }
- for (i = 0; i < 8; i++)
- chmap_value |= alsa_stream->chip->map_channels[i] << (i * 3);
-
m.type = VC_AUDIO_MSG_TYPE_CONFIG;
m.u.config.channels = channels;
m.u.config.samplerate = samplerate;
m.u.config.bps = bps;
- m.u.config.channelmap = chmap_value;
/* Create the message available completion */
init_completion(&instance->msg_avail_comp);
--- a/sound/arm/bcm2835.h
+++ b/sound/arm/bcm2835.h
@@ -107,8 +107,6 @@ typedef struct bcm2835_chip {
int old_volume; /* stores the volume value whist muted */
int dest;
int mute;
- int cea_chmap; /* currently requested Audio InfoFrame Data Byte 4 */
- int map_channels[8];
unsigned int opened;
unsigned int spdif_status;
@@ -151,8 +149,6 @@ int snd_bcm2835_new_ctl(bcm2835_chip_t *
int snd_bcm2835_new_pcm(bcm2835_chip_t * chip);
int snd_bcm2835_new_spdif_pcm(bcm2835_chip_t * chip);
-int snd_bcm2835_pcm_prepare_again(struct snd_pcm_substream *substream);
-
int bcm2835_audio_open(bcm2835_alsa_stream_t * alsa_stream);
int bcm2835_audio_close(bcm2835_alsa_stream_t * alsa_stream);
int bcm2835_audio_set_params(bcm2835_alsa_stream_t * alsa_stream,
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