Based on 4.1-rc1
v11:
- reduce the patch series to adding the tda998x codec only
v10:
- add the generic dt-card
- define the audio ports from a DT graph of ports (Russell King)
- reuse HDMI constants (Andrew Jackson - Jyri Sarha)
- alloc rate_constraints in codec (Jyri Sarha)
- fix bad number of channels (Jyri Sarha)
- correct codec generation from config (Russell King - Jyri Sarha)
- no module init/exit (Russell King)
v9:
- back to a TDA998x specific CODEC
- more comments
- change magic values to constants
v8:
- change some comments about the patches
v7:
- remove the change of the K predivider (Jyri Sarha)
- add S24_3LE and S32_LE as possible audio formats (Jyri Sarha)
- don't move the struct priv2 definition and use the
slave encoder private data as the device private data
(Russell King)
- remove the useless request_module (Russell King/Mark Brown)
- don't lock the HDMI module (Russell King)
- use platform_device_unregister to remove the codec
(Russell King)
v6:
- extend the HDMI CODEC instead of using a specific CODEC
v5:
- use the TDA998x private data instead of a specific area
for the CODEC interface
- the CODEC is TDA998x specific (Mark Brown)
v4:
- remove all the TDA998x specific stuff from the CODEC
- move the EDID scan from the CODEC to the TDA998x
- move the CODEC to sound/soc (Mark Brown)
- update the audio_sample_rate from the EDID (Andrew Jackson)
v3: fix bad rate (Andrew Jackson)
v2: check double stream start (Mark Brown)
Jean-Francois Moine (3):
drm/i2c: tda998x: Add support of a DT graph of ports
drm/i2c: tda998x: Change drvdata for audio extension
ASoC: tda998x: add a codec to the HDMI transmitter
.../devicetree/bindings/drm/i2c/tda998x.txt | 51 +++++
drivers/gpu/drm/i2c/tda998x_drv.c | 220 +++++++++++++++++++--
include/sound/tda998x.h | 30 +++
sound/soc/codecs/Kconfig | 5 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/tda998x.c | 174 ++++++++++++++++
6 files changed, 471 insertions(+), 11 deletions(-)
create mode 100644 include/sound/tda998x.h
create mode 100644 sound/soc/codecs/tda998x.c
--
2.1.4
Two kinds of ports may be declared in a DT graph of ports: video and audio.
This patch accepts the port value from a video port as an alternative
to the video-ports property.
It also accepts audio ports in the case the transmitter is not used as
a slave encoder.
The new file include/sound/tda998x.h prepares to the definition of
a tda998x CODEC.
Signed-off-by: Jean-Francois Moine <[email protected]>
---
.../devicetree/bindings/drm/i2c/tda998x.txt | 51 +++++++++++++
drivers/gpu/drm/i2c/tda998x_drv.c | 88 +++++++++++++++++++---
include/sound/tda998x.h | 8 ++
3 files changed, 138 insertions(+), 9 deletions(-)
create mode 100644 include/sound/tda998x.h
diff --git a/Documentation/devicetree/bindings/drm/i2c/tda998x.txt b/Documentation/devicetree/bindings/drm/i2c/tda998x.txt
index e9e4bce..35f6a80 100644
--- a/Documentation/devicetree/bindings/drm/i2c/tda998x.txt
+++ b/Documentation/devicetree/bindings/drm/i2c/tda998x.txt
@@ -16,6 +16,35 @@ Optional properties:
- video-ports: 24 bits value which defines how the video controller
output is wired to the TDA998x input - default: <0x230145>
+ This property is not used when ports are defined.
+
+Optional nodes:
+
+ - port: up to three ports.
+ The ports are defined according to [1].
+
+ Video port.
+ There may be only one video port.
+ This one must contain the following property:
+
+ - port-type: must be "rgb"
+
+ and may contain the optional property:
+
+ - reg: 24 bits value which defines how the video controller
+ output is wired to the TDA998x input (video pins)
+ When absent, the default value is <0x230145>.
+
+ Audio ports.
+ There may be one or two audio ports.
+ These ones must contain the following properties:
+
+ - port-type: must be "i2s" or "spdif"
+
+ - reg: 8 bits value which defines how the audio controller
+ output is wired to the TDA998x input (audio pins)
+
+[1] Documentation/devicetree/bindings/graph.txt
Example:
@@ -26,4 +55,26 @@ Example:
interrupts = <27 2>; /* falling edge */
pinctrl-0 = <&pmx_camera>;
pinctrl-names = "default";
+
+ port@230145 {
+ port-type = "rgb";
+ reg = <0x230145>;
+ hdmi_0: endpoint {
+ remote-endpoint = <&lcd0_0>;
+ };
+ };
+ port@3 { /* AP1 = I2S */
+ port-type = "i2s";
+ reg = <0x03>;
+ tda998x_i2s: endpoint {
+ remote-endpoint = <&audio1_i2s>;
+ };
+ };
+ port@4 { /* AP2 = S/PDIF */
+ port-type = "spdif";
+ reg = <0x04>;
+ tda998x_spdif: endpoint {
+ remote-endpoint = <&audio1_spdif1>;
+ };
+ };
};
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index 5febffd..a2ed391 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -27,6 +27,7 @@
#include <drm/drm_edid.h>
#include <drm/drm_of.h>
#include <drm/i2c/tda998x.h>
+#include <sound/tda998x.h>
#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
@@ -47,6 +48,8 @@ struct tda998x_priv {
wait_queue_head_t wq_edid;
volatile int wq_edid_wait;
struct drm_encoder *encoder;
+
+ struct tda998x_audio_s audio;
};
#define to_tda998x_priv(x) ((struct tda998x_priv *)to_encoder_slave(x)->slave_priv)
@@ -1227,9 +1230,57 @@ static struct drm_encoder_slave_funcs tda998x_encoder_slave_funcs = {
/* I2C driver functions */
+static int tda998x_parse_ports(struct tda998x_priv *priv,
+ struct device_node *np)
+{
+ struct device_node *of_port;
+ const char *port_type;
+ int ret, audio_index, reg, afmt;
+
+ audio_index = 0;
+ for_each_child_of_node(np, of_port) {
+ if (!of_port->name
+ || of_node_cmp(of_port->name, "port") != 0)
+ continue;
+ ret = of_property_read_string(of_port, "port-type",
+ &port_type);
+ if (ret < 0)
+ continue;
+ ret = of_property_read_u32(of_port, "reg", ®);
+ if (strcmp(port_type, "rgb") == 0) {
+ if (!ret) { /* video reg is optional */
+ priv->vip_cntrl_0 = reg >> 16;
+ priv->vip_cntrl_1 = reg >> 8;
+ priv->vip_cntrl_2 = reg;
+ }
+ continue;
+ }
+ if (strcmp(port_type, "i2s") == 0)
+ afmt = AFMT_I2S;
+ else if (strcmp(port_type, "spdif") == 0)
+ afmt = AFMT_SPDIF;
+ else
+ continue;
+ if (ret < 0) {
+ dev_err(&priv->hdmi->dev, "missing reg for %s\n",
+ port_type);
+ return ret;
+ }
+ if (audio_index >= ARRAY_SIZE(priv->audio.ports)) {
+ dev_err(&priv->hdmi->dev, "too many audio ports\n");
+ break;
+ }
+ priv->audio.ports[audio_index] = reg;
+ priv->audio.port_types[audio_index] = afmt;
+ audio_index++;
+ }
+ return 0;
+}
+
static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
{
struct device_node *np = client->dev.of_node;
+ struct device_node *of_port;
u32 video;
int rev_lo, rev_hi, ret;
unsigned short cec_addr;
@@ -1334,15 +1385,34 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
/* enable EDID read irq: */
reg_set(priv, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
- if (!np)
- return 0; /* non-DT */
-
- /* get the optional video properties */
- ret = of_property_read_u32(np, "video-ports", &video);
- if (ret == 0) {
- priv->vip_cntrl_0 = video >> 16;
- priv->vip_cntrl_1 = video >> 8;
- priv->vip_cntrl_2 = video;
+ /* get the device tree parameters */
+ if (np) {
+ of_port = of_get_child_by_name(np, "port");
+ if (of_port) { /* graph of ports */
+ of_node_put(of_port);
+ ret = tda998x_parse_ports(priv, np);
+ if (ret < 0)
+ goto fail;
+
+ /* initialize the default audio configuration */
+ if (priv->audio.ports[0]) {
+ priv->params.audio_cfg = priv->audio.ports[0];
+ priv->params.audio_format =
+ priv->audio.port_types[0];
+ priv->params.audio_clk_cfg =
+ priv->params.audio_format ==
+ AFMT_SPDIF ? 0 : 1;
+ }
+ } else {
+
+ /* optional video properties */
+ ret = of_property_read_u32(np, "video-ports", &video);
+ if (ret == 0) {
+ priv->vip_cntrl_0 = video >> 16;
+ priv->vip_cntrl_1 = video >> 8;
+ priv->vip_cntrl_2 = video;
+ }
+ }
}
return 0;
diff --git a/include/sound/tda998x.h b/include/sound/tda998x.h
new file mode 100644
index 0000000..487a809
--- /dev/null
+++ b/include/sound/tda998x.h
@@ -0,0 +1,8 @@
+#ifndef SND_TDA998X_H
+#define SND_TDA998X_H
+
+struct tda998x_audio_s {
+ u8 ports[2]; /* AP value */
+ u8 port_types[2]; /* AFMT_xxx */
+};
+#endif
--
2.1.4
The device drvdata is used for component bind, but points to the
encoder/connector structure which is hidden from the slave encoder.
For audio extension, the slave encoder private data must be accessible,
so, this patch changes drvdata to the slave encoder private data and
sets it in case of slave encoder use.
Signed-off-by: Jean-Francois Moine <[email protected]>
---
drivers/gpu/drm/i2c/tda998x_drv.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index a2ed391..e9b497e 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -1448,6 +1448,8 @@ static int tda998x_encoder_init(struct i2c_client *client,
encoder_slave->slave_priv = priv;
encoder_slave->slave_funcs = &tda998x_encoder_slave_funcs;
+ dev_set_drvdata(&client->dev, priv);
+
return 0;
}
@@ -1575,7 +1577,7 @@ static int tda998x_bind(struct device *dev, struct device *master, void *data)
if (!priv)
return -ENOMEM;
- dev_set_drvdata(dev, priv);
+ dev_set_drvdata(dev, &priv->base);
if (dev->of_node)
crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
@@ -1634,7 +1636,9 @@ err_encoder:
static void tda998x_unbind(struct device *dev, struct device *master,
void *data)
{
- struct tda998x_priv2 *priv = dev_get_drvdata(dev);
+ struct tda998x_priv *priv_s = dev_get_drvdata(dev);
+ struct tda998x_priv2 *priv =
+ container_of(priv_s, struct tda998x_priv2, base);
drm_connector_cleanup(&priv->connector);
drm_encoder_cleanup(&priv->encoder);
--
2.1.4
The tda998x CODEC maintains the audio format and rate constraints according
to the HDMI device parameters (EDID) and sets dynamically the input ports
in the TDA998x I2C driver on start/stop audio streaming.
Signed-off-by: Jean-Francois Moine <[email protected]>
---
drivers/gpu/drm/i2c/tda998x_drv.c | 124 +++++++++++++++++++++++++++
include/sound/tda998x.h | 22 +++++
sound/soc/codecs/Kconfig | 5 ++
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/tda998x.c | 174 ++++++++++++++++++++++++++++++++++++++
5 files changed, 327 insertions(+)
create mode 100644 sound/soc/codecs/tda998x.c
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index e9b497e..c40b7e5 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -755,6 +755,104 @@ tda998x_configure_audio(struct tda998x_priv *priv,
tda998x_write_aif(priv, p);
}
+#if IS_ENABLED(CONFIG_SND_SOC_TDA998X)
+/* tda998x audio codec interface */
+
+/* return the audio parameters */
+static int tda998x_get_audio_var(struct device *dev,
+ struct tda998x_audio_s **tda998x_audio)
+{
+ struct tda998x_priv *priv = dev_get_drvdata(dev);
+
+ if (!priv->encoder->crtc
+ || !priv->is_hdmi_sink)
+ return -ENODEV;
+
+ *tda998x_audio = &priv->audio;
+ return 0;
+}
+
+/* switch the audio port and initialize the audio parameters for streaming */
+static int tda998x_set_audio_input(struct device *dev,
+ int port_index,
+ unsigned sample_rate)
+{
+ struct tda998x_priv *priv = dev_get_drvdata(dev);
+ struct tda998x_encoder_params *p = &priv->params;
+
+ if (!priv->encoder->crtc)
+ return -ENODEV;
+
+ /* if no port, just disable the audio port */
+ if (port_index == PORT_NONE) {
+ reg_write(priv, REG_ENA_AP, 0);
+ return 0;
+ }
+
+ /* if same audio parameters, just enable the audio port */
+ if (p->audio_cfg == priv->audio.ports[port_index] &&
+ p->audio_sample_rate == sample_rate) {
+ reg_write(priv, REG_ENA_AP, p->audio_cfg);
+ return 0;
+ }
+
+ p->audio_format = priv->audio.port_types[port_index];
+ p->audio_clk_cfg = p->audio_format == AFMT_SPDIF ? 0 : 1;
+ p->audio_cfg = priv->audio.ports[port_index];
+ p->audio_sample_rate = sample_rate;
+ tda998x_configure_audio(priv, &priv->encoder->crtc->hwmode, p);
+ return 0;
+}
+
+/* get the audio capabilities from the EDID */
+static void tda998x_get_audio_caps(struct tda998x_priv *priv,
+ struct drm_connector *connector)
+{
+ u8 *eld = connector->eld;
+ u8 *sad;
+ int sad_count;
+ unsigned eld_ver, mnl;
+ u8 max_channels, rate_mask, fmt;
+
+ /* adjust the hw params from the ELD (EDID) */
+ eld_ver = eld[DRM_ELD_VER] >> DRM_ELD_VER_SHIFT;
+ if (eld_ver != 2 && eld_ver != 31)
+ return;
+
+ mnl = drm_eld_mnl(eld);
+ if (mnl > 16)
+ return;
+
+ sad_count = drm_eld_sad_count(eld);
+ sad = eld + DRM_ELD_CEA_SAD(mnl, 0);
+
+ /* Start from the basic audio settings */
+ max_channels = 1;
+ rate_mask = 0;
+ fmt = 0;
+ while (sad_count--) {
+ switch (sad[0] & 0x78) {
+ case 0x08: /* SAD uncompressed audio */
+ if ((sad[0] & 7) > max_channels)
+ max_channels = sad[0] & 7;
+ rate_mask |= sad[1];
+ fmt |= sad[2] & 0x07;
+ break;
+ }
+ sad += 3;
+ }
+
+ priv->audio.cea_sad.channels = max_channels;
+ priv->audio.cea_sad.freq = rate_mask;
+ priv->audio.cea_sad.format = fmt;
+}
+
+static struct tda998x_ops_s tda998x_codec_ops = {
+ .get_audio_var = tda998x_get_audio_var,
+ .set_audio_input = tda998x_set_audio_input,
+};
+#endif /* SND_SOC */
+
/* DRM encoder functions */
static void tda998x_encoder_set_config(struct tda998x_priv *priv,
@@ -774,6 +872,8 @@ static void tda998x_encoder_set_config(struct tda998x_priv *priv,
(p->mirr_f ? VIP_CNTRL_2_MIRR_F : 0);
priv->params = *p;
+ priv->audio.port_types[0] = p->audio_format;
+ priv->audio.ports[0] = p->audio_cfg;
}
static void tda998x_encoder_dpms(struct tda998x_priv *priv, int mode)
@@ -1118,6 +1218,15 @@ tda998x_encoder_get_modes(struct tda998x_priv *priv,
drm_mode_connector_update_edid_property(connector, edid);
n = drm_add_edid_modes(connector, edid);
priv->is_hdmi_sink = drm_detect_hdmi_monitor(edid);
+
+#if IS_ENABLED(CONFIG_SND_SOC_TDA998X)
+ /* set the audio parameters from the EDID */
+ if (priv->is_hdmi_sink) {
+ drm_edid_to_eld(connector, edid);
+ tda998x_get_audio_caps(priv, connector);
+ }
+#endif
+
kfree(edid);
return n;
@@ -1153,6 +1262,11 @@ static void tda998x_destroy(struct tda998x_priv *priv)
cancel_delayed_work_sync(&priv->dwork);
}
+#if IS_ENABLED(CONFIG_SND_SOC_TDA998X)
+ if (priv->audio.ports[0])
+ tda9998x_codec_unregister(&priv->hdmi->dev);
+#endif
+
i2c_unregister_device(priv->cec);
}
@@ -1289,6 +1403,9 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
priv->vip_cntrl_1 = VIP_CNTRL_1_SWAP_C(0) | VIP_CNTRL_1_SWAP_D(1);
priv->vip_cntrl_2 = VIP_CNTRL_2_SWAP_E(4) | VIP_CNTRL_2_SWAP_F(5);
+ priv->params.audio_frame[1] = 1; /* channels - 1 */
+ priv->params.audio_sample_rate = 48000; /* 48kHz */
+
priv->current_page = 0xff;
priv->hdmi = client;
/* CEC I2C address bound to TDA998x I2C addr by configuration pins */
@@ -1402,6 +1519,13 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
priv->params.audio_clk_cfg =
priv->params.audio_format ==
AFMT_SPDIF ? 0 : 1;
+
+#if IS_ENABLED(CONFIG_SND_SOC_TDA998X)
+ /* and create the audio CODEC */
+ tda9998x_codec_register(&client->dev,
+ &priv->audio,
+ &tda998x_codec_ops);
+#endif
}
} else {
diff --git a/include/sound/tda998x.h b/include/sound/tda998x.h
index 487a809..b4b747b 100644
--- a/include/sound/tda998x.h
+++ b/include/sound/tda998x.h
@@ -1,8 +1,30 @@
#ifndef SND_TDA998X_H
#define SND_TDA998X_H
+#include <drm/drm_edid.h>
+
+/* port index for audio stream stop */
+#define PORT_NONE (-1)
+
struct tda998x_audio_s {
u8 ports[2]; /* AP value */
u8 port_types[2]; /* AFMT_xxx */
+#if IS_ENABLED(CONFIG_SND_SOC_TDA998X)
+ struct cea_sad cea_sad; /* Short Audio Descriptor */
+ void *codec_priv;
+#endif
};
+
+struct tda998x_ops_s {
+ int (*get_audio_var)(struct device *dev,
+ struct tda998x_audio_s **tda998x_audio);
+ int (*set_audio_input)(struct device *dev,
+ int port_index,
+ unsigned sample_rate);
+};
+
+int tda9998x_codec_register(struct device *dev,
+ struct tda998x_audio_s *tda998x_audio_i,
+ struct tda998x_ops_s *tda998x_ops);
+void tda9998x_codec_unregister(struct device *dev);
#endif
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 061c465..eede478 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -104,6 +104,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_STAC9766 if SND_SOC_AC97_BUS
select SND_SOC_TAS2552 if I2C
select SND_SOC_TAS5086 if I2C
+ select SND_SOC_TDA998X if DRM_I2C_NXP_TDA998X
select SND_SOC_TFA9879 if I2C
select SND_SOC_TLV320AIC23_I2C if I2C
select SND_SOC_TLV320AIC23_SPI if SPI_MASTER
@@ -611,6 +612,10 @@ config SND_SOC_TAS5086
tristate "Texas Instruments TAS5086 speaker amplifier"
depends on I2C
+config SND_SOC_TDA998X
+ def_tristate y
+ depends on DRM_I2C_NXP_TDA998X
+
config SND_SOC_TFA9879
tristate "NXP Semiconductors TFA9879 amplifier"
depends on I2C
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index abe2d7e..8183474 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -106,6 +106,7 @@ snd-soc-sta350-objs := sta350.o
snd-soc-sta529-objs := sta529.o
snd-soc-stac9766-objs := stac9766.o
snd-soc-tas5086-objs := tas5086.o
+snd-soc-tda998x-objs := tda998x.o
snd-soc-tfa9879-objs := tfa9879.o
snd-soc-tlv320aic23-objs := tlv320aic23.o
snd-soc-tlv320aic23-i2c-objs := tlv320aic23-i2c.o
@@ -288,6 +289,7 @@ obj-$(CONFIG_SND_SOC_STA529) += snd-soc-sta529.o
obj-$(CONFIG_SND_SOC_STAC9766) += snd-soc-stac9766.o
obj-$(CONFIG_SND_SOC_TAS2552) += snd-soc-tas2552.o
obj-$(CONFIG_SND_SOC_TAS5086) += snd-soc-tas5086.o
+obj-$(CONFIG_SND_SOC_TDA998X) += snd-soc-tda998x.o
obj-$(CONFIG_SND_SOC_TFA9879) += snd-soc-tfa9879.o
obj-$(CONFIG_SND_SOC_TLV320AIC23) += snd-soc-tlv320aic23.o
obj-$(CONFIG_SND_SOC_TLV320AIC23_I2C) += snd-soc-tlv320aic23-i2c.o
diff --git a/sound/soc/codecs/tda998x.c b/sound/soc/codecs/tda998x.c
new file mode 100644
index 0000000..0a186e7
--- /dev/null
+++ b/sound/soc/codecs/tda998x.c
@@ -0,0 +1,174 @@
+/*
+ * ALSA SoC TDA998x CODEC
+ *
+ * Copyright (C) 2015 Jean-Francois Moine
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <sound/soc.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <sound/pcm_params.h>
+#include <drm/i2c/tda998x.h>
+#include <sound/tda998x.h>
+
+/* functions in tda998x_drv */
+static struct tda998x_ops_s *tda998x_ops;
+
+static int tda998x_codec_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct tda998x_audio_s *tda998x_audio;
+ struct snd_pcm_hw_constraint_list *rate_constraints;
+#define SAD_FMT_16 0x01 /* format values in the sad */
+#define SAD_FMT_20 0x02
+#define SAD_FMT_24 0x04
+ u64 formats;
+ int ret;
+ static const u32 hdmi_rates[] = {
+ 32000, 44100, 48000, 88200, 96000, 176400, 192000
+ };
+
+ /* get the audio variables */
+ ret = tda998x_ops->get_audio_var(dai->dev, &tda998x_audio);
+ if (ret < 0)
+ return ret; /* no screen */
+
+ /* convert the EDID values to audio constraints */
+ rate_constraints = tda998x_audio->codec_priv;
+ rate_constraints->list = hdmi_rates;
+ rate_constraints->count = ARRAY_SIZE(hdmi_rates);
+ rate_constraints->mask = tda998x_audio->cea_sad.freq;
+ snd_pcm_hw_constraint_list(runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ rate_constraints);
+
+ formats = 0;
+ if (tda998x_audio->cea_sad.format & SAD_FMT_16)
+ formats |= SNDRV_PCM_FMTBIT_S16_LE;
+ if (tda998x_audio->cea_sad.format & SAD_FMT_20)
+ formats |= SNDRV_PCM_FMTBIT_S20_3LE;
+ if (tda998x_audio->cea_sad.format & SAD_FMT_24)
+ formats |= SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S24_3LE |
+ SNDRV_PCM_FMTBIT_S32_LE;
+ snd_pcm_hw_constraint_mask64(runtime,
+ SNDRV_PCM_HW_PARAM_FORMAT,
+ formats);
+
+ snd_pcm_hw_constraint_minmax(runtime,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ 1, tda998x_audio->cea_sad.channels + 1);
+ return 0;
+}
+
+/* ask the HDMI transmitter to activate the audio input port */
+static int tda998x_codec_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ return tda998x_ops->set_audio_input(dai->dev, dai->id,
+ params_rate(params));
+}
+
+static void tda998x_codec_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ tda998x_ops->set_audio_input(dai->dev, PORT_NONE, 0);
+}
+
+static const struct snd_soc_dai_ops tda998x_codec_ops = {
+ .startup = tda998x_codec_startup,
+ .hw_params = tda998x_codec_hw_params,
+ .shutdown = tda998x_codec_shutdown,
+};
+
+#define TDA998X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+static struct snd_soc_dai_driver tda998x_dai_i2s = {
+ .name = "i2s-hifi",
+ .playback = {
+ .stream_name = "HDMI I2S Playback",
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 5512,
+ .rate_max = 192000,
+ .formats = TDA998X_FORMATS,
+ },
+ .ops = &tda998x_codec_ops,
+};
+
+static const struct snd_soc_dapm_widget tda998x_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("hdmi-out"),
+};
+static const struct snd_soc_dapm_route tda998x_routes[] = {
+ { "hdmi-out", NULL, "HDMI I2S Playback" },
+ { "hdmi-out", NULL, "HDMI SPDIF Playback" },
+};
+
+static struct snd_soc_codec_driver tda998x_codec_drv = {
+ .dapm_widgets = tda998x_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(tda998x_widgets),
+ .dapm_routes = tda998x_routes,
+ .num_dapm_routes = ARRAY_SIZE(tda998x_routes),
+ .ignore_pmdown_time = true,
+};
+
+int tda9998x_codec_register(struct device *dev,
+ struct tda998x_audio_s *tda998x_audio,
+ struct tda998x_ops_s *tda998x_ops_i)
+{
+ struct snd_pcm_hw_constraint_list *codec_priv;
+ struct snd_soc_dai_driver *dais, *p_dai;
+ int i, ndais;
+
+ tda998x_ops = tda998x_ops_i;
+
+ codec_priv = devm_kzalloc(dev, sizeof(*codec_priv), GFP_KERNEL);
+ if (!codec_priv)
+ return -ENOMEM;
+ tda998x_audio->codec_priv = codec_priv;
+
+ /* build the DAIs */
+ for (ndais = 0; ndais < ARRAY_SIZE(tda998x_audio->ports); ndais++) {
+ if (!tda998x_audio->ports[ndais])
+ break;
+ }
+ dais = devm_kzalloc(dev, sizeof(*dais) * ndais, GFP_KERNEL);
+ if (!dais)
+ return -ENOMEM;
+ for (i = 0, p_dai = dais; i < ndais ; i++, p_dai++) {
+ memcpy(p_dai, &tda998x_dai_i2s, sizeof(*p_dai));
+ p_dai->id = i;
+ if (tda998x_audio->port_types[i] == AFMT_SPDIF) {
+ p_dai->name = "spdif-hifi";
+ p_dai->playback.stream_name = "HDMI SPDIF Playback";
+ p_dai->playback.channels_max = 2;
+ p_dai->playback.rate_min = 22050;
+ }
+ }
+
+ return snd_soc_register_codec(dev,
+ &tda998x_codec_drv,
+ dais, ndais);
+}
+EXPORT_SYMBOL(tda9998x_codec_register);
+
+void tda9998x_codec_unregister(struct device *dev)
+{
+ snd_soc_unregister_codec(dev);
+}
+EXPORT_SYMBOL(tda9998x_codec_unregister);
+
+MODULE_AUTHOR("Jean-Francois Moine <[email protected]>");
+MODULE_DESCRIPTION("TDA998X CODEC");
+MODULE_LICENSE("GPL");
--
2.1.4
On Wed, Apr 29, 2015 at 12:53:53PM +0200, Jean-Francois Moine wrote:
> +/* get the audio capabilities from the EDID */
> +static void tda998x_get_audio_caps(struct tda998x_priv *priv,
> + struct drm_connector *connector)
> +{
Russell created some generic EDID handling code (sound/core: add DRM ELD
helper), if at all possible I'd really like to get those patches merged
and use them rather than have custom code. If they're not suitable then
let's understand why.