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openmptcprouter/root/target/linux/bcm27xx/patches-5.14/0443-vc4-Report-channel-mapping-back-to-userspace.patch
Ycarus (Yannick Chabanois) 5c593832cc Add 5.14 patches for RPI
2021-10-01 16:58:58 +02:00

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From 52483e09534ae00ca4e01643bbce2cd2fe48c266 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Mon, 20 Apr 2020 18:00:38 +0100
Subject: [PATCH 443/552] vc4: Report channel mapping back to userspace
This follows logic in hdmi-codec.c to use speaker layout
from ELD to choose a suitable speaker mapping based on
number of channels requested and signal that in audio
infoframe and report this back to userspace.
This allows apps like speaker-test and kodi to get the
output to the right speakers.
Signed-off-by: Dom Cobley <popcornmix@gmail.com>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 415 +++++++++++++++++++++++++++++++++
drivers/gpu/drm/vc4/vc4_hdmi.h | 3 +
2 files changed, 418 insertions(+)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 2f3a7674902e..16a2e214a1b3 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -50,6 +50,7 @@
#include <sound/pcm_drm_eld.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
+#include <sound/tlv.h>
#include "media/cec.h"
#include "vc4_drv.h"
#include "vc4_hdmi.h"
@@ -98,6 +99,311 @@
#define HDMI_14_MAX_TMDS_CLK (340 * 1000 * 1000)
+#define HDMI_CODEC_CHMAP_IDX_UNKNOWN -1
+
+/*
+ * CEA speaker placement for HDMI 1.4:
+ *
+ * FL FLC FC FRC FR FRW
+ *
+ * LFE
+ *
+ * RL RLC RC RRC RR
+ *
+ * Speaker placement has to be extended to support HDMI 2.0
+ */
+enum hdmi_codec_cea_spk_placement {
+ FL = BIT(0), /* Front Left */
+ FC = BIT(1), /* Front Center */
+ FR = BIT(2), /* Front Right */
+ FLC = BIT(3), /* Front Left Center */
+ FRC = BIT(4), /* Front Right Center */
+ RL = BIT(5), /* Rear Left */
+ RC = BIT(6), /* Rear Center */
+ RR = BIT(7), /* Rear Right */
+ RLC = BIT(8), /* Rear Left Center */
+ RRC = BIT(9), /* Rear Right Center */
+ LFE = BIT(10), /* Low Frequency Effect */
+};
+
+/*
+ * cea Speaker allocation structure
+ */
+struct hdmi_codec_cea_spk_alloc {
+ const int ca_id;
+ unsigned int n_ch;
+ unsigned long mask;
+};
+
+/* Channel maps stereo HDMI */
+static const struct snd_pcm_chmap_elem hdmi_codec_stereo_chmaps[] = {
+ { .channels = 2,
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
+ { }
+};
+
+/* Channel maps for multi-channel playbacks, up to 8 n_ch */
+static const struct snd_pcm_chmap_elem hdmi_codec_8ch_chmaps[] = {
+ { .channels = 2, /* CA_ID 0x00 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
+ { .channels = 4, /* CA_ID 0x01 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA } },
+ { .channels = 4, /* CA_ID 0x02 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC } },
+ { .channels = 4, /* CA_ID 0x03 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC } },
+ { .channels = 6, /* CA_ID 0x04 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 6, /* CA_ID 0x05 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 6, /* CA_ID 0x06 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 6, /* CA_ID 0x07 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 6, /* CA_ID 0x08 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+ { .channels = 6, /* CA_ID 0x09 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+ { .channels = 6, /* CA_ID 0x0A */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+ { .channels = 6, /* CA_ID 0x0B */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+ { .channels = 8, /* CA_ID 0x0C */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 8, /* CA_ID 0x0D */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 8, /* CA_ID 0x0E */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 8, /* CA_ID 0x0F */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 8, /* CA_ID 0x10 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
+ { .channels = 8, /* CA_ID 0x11 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
+ { .channels = 8, /* CA_ID 0x12 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
+ { .channels = 8, /* CA_ID 0x13 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
+ { .channels = 8, /* CA_ID 0x14 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x15 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x16 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x17 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x18 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x19 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x1A */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x1B */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x1C */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x1D */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x1E */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x1F */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { }
+};
+
+/*
+ * hdmi_codec_channel_alloc: speaker configuration available for CEA
+ *
+ * This is an ordered list that must match with hdmi_codec_8ch_chmaps struct
+ * The preceding ones have better chances to be selected by
+ * hdmi_codec_get_ch_alloc_table_idx().
+ */
+static const struct hdmi_codec_cea_spk_alloc hdmi_codec_channel_alloc[] = {
+ { .ca_id = 0x00, .n_ch = 2,
+ .mask = FL | FR},
+ /* 2.1 */
+ { .ca_id = 0x01, .n_ch = 4,
+ .mask = FL | FR | LFE},
+ /* Dolby Surround */
+ { .ca_id = 0x02, .n_ch = 4,
+ .mask = FL | FR | FC },
+ /* surround51 */
+ { .ca_id = 0x0b, .n_ch = 6,
+ .mask = FL | FR | LFE | FC | RL | RR},
+ /* surround40 */
+ { .ca_id = 0x08, .n_ch = 6,
+ .mask = FL | FR | RL | RR },
+ /* surround41 */
+ { .ca_id = 0x09, .n_ch = 6,
+ .mask = FL | FR | LFE | RL | RR },
+ /* surround50 */
+ { .ca_id = 0x0a, .n_ch = 6,
+ .mask = FL | FR | FC | RL | RR },
+ /* 6.1 */
+ { .ca_id = 0x0f, .n_ch = 8,
+ .mask = FL | FR | LFE | FC | RL | RR | RC },
+ /* surround71 */
+ { .ca_id = 0x13, .n_ch = 8,
+ .mask = FL | FR | LFE | FC | RL | RR | RLC | RRC },
+ /* others */
+ { .ca_id = 0x03, .n_ch = 8,
+ .mask = FL | FR | LFE | FC },
+ { .ca_id = 0x04, .n_ch = 8,
+ .mask = FL | FR | RC},
+ { .ca_id = 0x05, .n_ch = 8,
+ .mask = FL | FR | LFE | RC },
+ { .ca_id = 0x06, .n_ch = 8,
+ .mask = FL | FR | FC | RC },
+ { .ca_id = 0x07, .n_ch = 8,
+ .mask = FL | FR | LFE | FC | RC },
+ { .ca_id = 0x0c, .n_ch = 8,
+ .mask = FL | FR | RC | RL | RR },
+ { .ca_id = 0x0d, .n_ch = 8,
+ .mask = FL | FR | LFE | RL | RR | RC },
+ { .ca_id = 0x0e, .n_ch = 8,
+ .mask = FL | FR | FC | RL | RR | RC },
+ { .ca_id = 0x10, .n_ch = 8,
+ .mask = FL | FR | RL | RR | RLC | RRC },
+ { .ca_id = 0x11, .n_ch = 8,
+ .mask = FL | FR | LFE | RL | RR | RLC | RRC },
+ { .ca_id = 0x12, .n_ch = 8,
+ .mask = FL | FR | FC | RL | RR | RLC | RRC },
+ { .ca_id = 0x14, .n_ch = 8,
+ .mask = FL | FR | FLC | FRC },
+ { .ca_id = 0x15, .n_ch = 8,
+ .mask = FL | FR | LFE | FLC | FRC },
+ { .ca_id = 0x16, .n_ch = 8,
+ .mask = FL | FR | FC | FLC | FRC },
+ { .ca_id = 0x17, .n_ch = 8,
+ .mask = FL | FR | LFE | FC | FLC | FRC },
+ { .ca_id = 0x18, .n_ch = 8,
+ .mask = FL | FR | RC | FLC | FRC },
+ { .ca_id = 0x19, .n_ch = 8,
+ .mask = FL | FR | LFE | RC | FLC | FRC },
+ { .ca_id = 0x1a, .n_ch = 8,
+ .mask = FL | FR | RC | FC | FLC | FRC },
+ { .ca_id = 0x1b, .n_ch = 8,
+ .mask = FL | FR | LFE | RC | FC | FLC | FRC },
+ { .ca_id = 0x1c, .n_ch = 8,
+ .mask = FL | FR | RL | RR | FLC | FRC },
+ { .ca_id = 0x1d, .n_ch = 8,
+ .mask = FL | FR | LFE | RL | RR | FLC | FRC },
+ { .ca_id = 0x1e, .n_ch = 8,
+ .mask = FL | FR | FC | RL | RR | FLC | FRC },
+ { .ca_id = 0x1f, .n_ch = 8,
+ .mask = FL | FR | LFE | FC | RL | RR | FLC | FRC },
+};
+
+static unsigned long hdmi_codec_spk_mask_from_alloc(int spk_alloc)
+{
+ int i;
+ static const unsigned long hdmi_codec_eld_spk_alloc_bits[] = {
+ [0] = FL | FR, [1] = LFE, [2] = FC, [3] = RL | RR,
+ [4] = RC, [5] = FLC | FRC, [6] = RLC | RRC,
+ };
+ unsigned long spk_mask = 0;
+
+ for (i = 0; i < ARRAY_SIZE(hdmi_codec_eld_spk_alloc_bits); i++) {
+ if (spk_alloc & (1 << i))
+ spk_mask |= hdmi_codec_eld_spk_alloc_bits[i];
+ }
+
+ return spk_mask;
+}
+
+static int hdmi_codec_get_ch_alloc_table_idx(struct vc4_hdmi *vc4_hdmi,
+ unsigned char channels)
+{
+ struct drm_connector *connector = &vc4_hdmi->connector;
+ int i;
+ u8 spk_alloc;
+ unsigned long spk_mask;
+ const struct hdmi_codec_cea_spk_alloc *cap = hdmi_codec_channel_alloc;
+
+ spk_alloc = drm_eld_get_spk_alloc(connector->eld);
+ spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
+
+ for (i = 0; i < ARRAY_SIZE(hdmi_codec_channel_alloc); i++, cap++) {
+ /* If spk_alloc == 0, HDMI is unplugged return stereo config*/
+ if (!spk_alloc && cap->ca_id == 0)
+ return i;
+ if (cap->n_ch != channels)
+ continue;
+ if (!(cap->mask == (spk_mask & cap->mask)))
+ continue;
+ return i;
+ }
+
+ return -EINVAL;
+}
+
+static void hdmi_codec_eld_chmap(struct vc4_hdmi *vc4_hdmi)
+{
+ struct drm_connector *connector = &vc4_hdmi->connector;
+ u8 spk_alloc;
+ unsigned long spk_mask;
+
+ spk_alloc = drm_eld_get_spk_alloc(connector->eld);
+ spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
+
+ /* Detect if only stereo supported, else return 8 channels mappings */
+ if ((spk_mask & ~(FL | FR)))
+ vc4_hdmi->audio.chmap = hdmi_codec_8ch_chmaps;
+ else
+ vc4_hdmi->audio.chmap = hdmi_codec_stereo_chmaps;
+}
+
static bool vc4_hdmi_mode_needs_scrambling(const struct drm_display_mode *mode)
{
return (mode->clock * 1000) > HDMI_14_MAX_TMDS_CLK;
@@ -487,6 +793,9 @@ static void vc4_hdmi_set_audio_infoframe(struct drm_encoder *encoder)
frame.audio.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
frame.audio.channels = vc4_hdmi->audio.channels;
+ /* Select a channel allocation that matches with ELD and pcm channels */
+ frame.audio.channel_allocation = vc4_hdmi->audio.chmap_idx;
+
vc4_hdmi_write_infoframe(encoder, &frame);
}
@@ -1250,6 +1559,10 @@ static int vc4_hdmi_audio_startup(struct snd_pcm_substream *substream,
if (ret)
return ret;
+ /* Select chmap supported */
+ vc4_hdmi->audio.max_channels = 8;
+ hdmi_codec_eld_chmap(vc4_hdmi);
+
return 0;
}
@@ -1336,6 +1649,7 @@ static int vc4_hdmi_audio_prepare(struct snd_pcm_substream *substream,
u32 channel_map;
u32 mai_audio_format;
u32 mai_sample_rate;
+ int idx;
if (substream != vc4_hdmi->audio.substream)
return -EINVAL;
@@ -1398,6 +1712,14 @@ static int vc4_hdmi_audio_prepare(struct snd_pcm_substream *substream,
HDMI_WRITE(HDMI_AUDIO_PACKET_CONFIG, audio_packet_config);
vc4_hdmi_set_n_cts(vc4_hdmi);
+ idx = hdmi_codec_get_ch_alloc_table_idx(vc4_hdmi, vc4_hdmi->audio.channels);
+ if (idx < 0) {
+ DRM_ERROR("Not able to map channels to speakers (%d)\n", idx);
+ vc4_hdmi->audio.chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
+ } else {
+ vc4_hdmi->audio.chmap_idx = hdmi_codec_channel_alloc[idx].ca_id;
+ }
+
vc4_hdmi_set_audio_infoframe(encoder);
return 0;
@@ -1516,6 +1838,89 @@ static int vc4_spdif_mask_get(struct snd_kcontrol *kcontrol,
return 0;
}
+/*
+ * ALSA API channel-map control callbacks
+ */
+static int vc4_chmap_ctl_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+ struct vc4_hdmi *vc4_hdmi = snd_component_to_hdmi(component);
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = vc4_hdmi->audio.max_channels;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = SNDRV_CHMAP_LAST;
+
+ return 0;
+}
+
+static int vc4_chmap_ctl_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+ struct vc4_hdmi *vc4_hdmi = snd_component_to_hdmi(component);
+ unsigned const char *map;
+ unsigned int i;
+
+ if (!vc4_hdmi->audio.chmap)
+ return -EINVAL;
+
+ map = vc4_hdmi->audio.chmap[vc4_hdmi->audio.chmap_idx].map;
+
+ for (i = 0; i < vc4_hdmi->audio.max_channels; i++) {
+ if (vc4_hdmi->audio.chmap_idx == HDMI_CODEC_CHMAP_IDX_UNKNOWN)
+ ucontrol->value.integer.value[i] = 0;
+ else
+ ucontrol->value.integer.value[i] = map[i];
+ }
+ return 0;
+}
+
+static int vc4_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
+ unsigned int size, unsigned int __user *tlv)
+{
+ struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+ struct vc4_hdmi *vc4_hdmi = snd_component_to_hdmi(component);
+ const struct snd_pcm_chmap_elem *map;
+ unsigned int __user *dst;
+ int c, count = 0;
+
+ if (!vc4_hdmi->audio.chmap)
+ return -EINVAL;
+ if (size < 8)
+ return -ENOMEM;
+ if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
+ return -EFAULT;
+ size -= 8;
+ dst = tlv + 2;
+ for (map = vc4_hdmi->audio.chmap; map->channels; map++) {
+ int chs_bytes = map->channels * 4;
+ //if (!valid_chmap_channels(info, map->channels))
+ // continue;
+ 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 < map->channels; c++) {
+ if (put_user(map->map[c], dst))
+ return -EFAULT;
+ dst++;
+ }
+ }
+ if (put_user(count, tlv + 1))
+ return -EFAULT;
+ return 0;
+}
+
static const struct snd_kcontrol_new vc4_hdmi_audio_controls[] = {
{
.access = SNDRV_CTL_ELEM_ACCESS_READ |
@@ -1538,6 +1943,16 @@ static const struct snd_kcontrol_new vc4_hdmi_audio_controls[] = {
.info = vc4_spdif_info,
.get = vc4_spdif_mask_get,
},
+ {
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_TLV_READ |
+ SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK,
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "Playback Channel Map",
+ .info = vc4_chmap_ctl_info,
+ .get = vc4_chmap_ctl_get,
+ .tlv.c = vc4_chmap_ctl_tlv,
+ },
};
static const struct snd_soc_dapm_widget vc4_hdmi_audio_widgets[] = {
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h
index 07fa6007a60c..4d38098b6172 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.h
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
@@ -119,6 +119,9 @@ struct vc4_hdmi_audio {
bool streaming;
unsigned char iec_status[4];
+ const struct snd_pcm_chmap_elem *chmap;
+ unsigned int chmap_idx;
+ unsigned int max_channels;
};
/* General HDMI hardware state. */
--
2.33.0
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