aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/brcm2708/patches-4.4/0129-bcm2835-implement-channel-map-API.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0129-bcm2835-implement-channel-map-API.patch')
-rw-r--r--target/linux/brcm2708/patches-4.4/0129-bcm2835-implement-channel-map-API.patch421
1 files changed, 0 insertions, 421 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0129-bcm2835-implement-channel-map-API.patch b/target/linux/brcm2708/patches-4.4/0129-bcm2835-implement-channel-map-API.patch
deleted file mode 100644
index 3da4fc41eb..0000000000
--- a/target/linux/brcm2708/patches-4.4/0129-bcm2835-implement-channel-map-API.patch
+++ /dev/null
@@ -1,421 +0,0 @@
-From dead6a5d8c3cd19b1197b60a674f898270a8e1d1 Mon Sep 17 00:00:00 2001
-From: wm4 <wm4@nowhere>
-Date: Wed, 13 Jan 2016 19:43:12 +0100
-Subject: [PATCH] bcm2835: implement channel map API
-
-Report all layouts supported by the HDMI protocol to userspace.
-Make the videocore set the correct layout according to the
-userspace request.
-
-Some code taken from patch_hdmi.c. In particular, the HDMI channel
-layout table was copied without changes - with the idea in mind that
-hopefully it can be shared one day. Or at least updating it will be
-simpler.
-
-In my tests, everything appears to work, except when outputting
-FL FR RL RR. Then my receiver outputs RL on both the RL and RR
-speakers, while RR is never heard.
----
- sound/arm/bcm2835-ctl.c | 276 ++++++++++++++++++++++++++++++++++++++++++++++
- sound/arm/bcm2835-pcm.c | 22 +++-
- sound/arm/bcm2835-vchiq.c | 13 +++
- sound/arm/bcm2835.h | 4 +
- 4 files changed, 311 insertions(+), 4 deletions(-)
-
---- a/sound/arm/bcm2835-ctl.c
-+++ b/sound/arm/bcm2835-ctl.c
-@@ -300,6 +300,281 @@ 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 cur = 0;
-+ int i;
-+
-+ if (!substream || !substream->runtime)
-+ return -ENODEV;
-+
-+ 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;
-+ return 0;
-+}
-+
-+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 remap[8];
-+
-+ if (!substream || !substream->runtime)
-+ return -ENODEV;
-+
-+ 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:
-+ return -EBUSY;
-+ }
-+
-+ 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)
-+ return -EINVAL;
-+
-+ /* don't change the layout if another substream is active */
-+ if (chip->opened != (1 << substream->number) && chip->cea_chmap != cea_chmap)
-+ return -EBUSY; /* unsure whether this is a good error code */
-+
-+ 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);
-+ return 0;
-+}
-+
-+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;
-@@ -313,6 +588,7 @@ 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
-@@ -231,6 +231,9 @@ static int snd_bcm2835_playback_open_gen
-
- 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;
-@@ -341,8 +344,7 @@ static int snd_bcm2835_pcm_hw_free(struc
- return snd_pcm_lib_free_pages(substream);
- }
-
--/* prepare callback */
--static int snd_bcm2835_pcm_prepare(struct snd_pcm_substream *substream)
-+int snd_bcm2835_pcm_prepare_again(struct snd_pcm_substream *substream)
- {
- bcm2835_chip_t *chip = snd_pcm_substream_chip(substream);
- struct snd_pcm_runtime *runtime = substream->runtime;
-@@ -350,8 +352,6 @@ static int snd_bcm2835_pcm_prepare(struc
- int channels;
- int err;
-
-- audio_info(" .. IN\n");
--
- /* notify the vchiq that it should enter spdif passthrough mode by
- * setting channels=0 (see
- * https://github.com/raspberrypi/linux/issues/528) */
-@@ -367,6 +367,20 @@ static int snd_bcm2835_pcm_prepare(struc
- 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");
-+
-+ 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
-@@ -570,6 +570,8 @@ 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");
-
-@@ -593,10 +595,21 @@ 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
-@@ -107,6 +107,8 @@ 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;
-@@ -149,6 +151,8 @@ 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,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 08:09:03 +0000