[RFC][PATCH 0/4] Audio support for adv7511 hdmi bridge

[RFC][PATCH 0/4] Audio support for adv7511 hdmi bridge

[John Stultz]

This is an initial swing at getting the adv7511 hdmi bridge
audio support reviewed.

I've taken the core audio work done by Lars-Peter Clausen, and
adapted by Srinivas Kandagatla and Archit Taneja, and tried to
rework it to use the hdmi-codec sound driver.

This patchset, along with the i2s driver and dts changes allows
HDMI audio to work on the HiKey board.

I'd really appreciate any thoughts or feedback.

thanks
-john

Cc: David Airlie <airlied@linux.ie>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Andy Green <andy@warmcat.com>
Cc: Dave Long <dave.long@linaro.org>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Zhangfei Gao <zhangfei.gao@linaro.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: dri-devel@lists.freedesktop.org
Andy Green (1):
  drm/bridge: adv7511: Initialize audio packet on adv7533

Archit Taneja (1):
  drm/bridge: adv7511: Move the common data structures to header file

John Stultz (1):
  drm/bridge: adv7511: Add Audio support.

Srinivas Kandagatla (1):
  drm/bridge: adv7511: Enable the audio data and clock pads on adv7533

 drivers/gpu/drm/bridge/adv7511/Kconfig         |   1 +
 drivers/gpu/drm/bridge/adv7511/Makefile        |   2 +-
 drivers/gpu/drm/bridge/adv7511/adv7511.h       |  12 ++
 drivers/gpu/drm/bridge/adv7511/adv7511_audio.c | 208 +++++++++++++++++++++++++
 drivers/gpu/drm/bridge/adv7511/adv7511_drv.c   |   9 +-
 drivers/gpu/drm/bridge/adv7511/adv7533.c       |  23 +++
 6 files changed, 252 insertions(+), 3 deletions(-)
 create mode 100644 drivers/gpu/drm/bridge/adv7511/adv7511_audio.c

-- 
1.9.1

[RFC][PATCH 1/4] drm/bridge: adv7511: Move the common data structures to header file

[John Stultz]

From: Archit Taneja <architt@codeaurora.org>

This patch moves the adv7511 data structure to header file so that the
audio driver file could use it.

Cc: David Airlie <airlied@linux.ie>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Andy Green <andy@warmcat.com>
Cc: Dave Long <dave.long@linaro.org>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Zhangfei Gao <zhangfei.gao@linaro.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
 drivers/gpu/drm/bridge/adv7511/adv7511.h     | 8 ++++++++
 drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 4 ++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h
index 161c923..c7002a0 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
@@ -16,6 +16,14 @@
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_mipi_dsi.h>
 
+#include <drm/drm_crtc_helper.h>
+
+struct regmap;
+struct adv7511;
+
+int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet);
+int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet);
+
 #define ADV7511_REG_CHIP_REVISION		0x00
 #define ADV7511_REG_N0				0x01
 #define ADV7511_REG_N1				0x02
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index ec8fb2e..f8eb7f8 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -160,7 +160,7 @@ static void adv7511_set_colormap(struct adv7511 *adv7511, bool enable,
 			   ADV7511_CSC_UPDATE_MODE, 0);
 }
 
-static int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet)
+int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet)
 {
 	if (packet & 0xff)
 		regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
@@ -175,7 +175,7 @@ static int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet)
 	return 0;
 }
 
-static int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet)
+int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet)
 {
 	if (packet & 0xff)
 		regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
-- 
1.9.1

[RFC][PATCH 2/4] drm/bridge: adv7511: Add Audio support.

[John Stultz]

This patch adds support to Audio for both adv7511 and adv7533
bridge chips.

This patch was originally from [1] by Lars-Peter Clausen <lars@metafoo.de>
and was adapted by Archit Taneja <architt@codeaurora.org> and
Srinivas Kandagatla <srinivas.kandagatla@linaro.org>.

Then I heavily reworked it to use the hdmi-codec driver. So credit
to them, but blame to me.

[1] https://github.com/analogdevicesinc/linux/blob/xcomm_zynq/drivers/gpu/drm/i2c/adv7511_audio.c

Cc: David Airlie <airlied@linux.ie>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Andy Green <andy@warmcat.com>
Cc: Dave Long <dave.long@linaro.org>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Zhangfei Gao <zhangfei.gao@linaro.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
 drivers/gpu/drm/bridge/adv7511/Kconfig         |   1 +
 drivers/gpu/drm/bridge/adv7511/Makefile        |   2 +-
 drivers/gpu/drm/bridge/adv7511/adv7511.h       |   4 +
 drivers/gpu/drm/bridge/adv7511/adv7511_audio.c | 208 +++++++++++++++++++++++++
 drivers/gpu/drm/bridge/adv7511/adv7511_drv.c   |   5 +
 5 files changed, 219 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/bridge/adv7511/adv7511_audio.c

diff --git a/drivers/gpu/drm/bridge/adv7511/Kconfig b/drivers/gpu/drm/bridge/adv7511/Kconfig
index d2b0499..e3975e9 100644
--- a/drivers/gpu/drm/bridge/adv7511/Kconfig
+++ b/drivers/gpu/drm/bridge/adv7511/Kconfig
@@ -3,6 +3,7 @@ config DRM_I2C_ADV7511
 	depends on OF
 	select DRM_KMS_HELPER
 	select REGMAP_I2C
+	select SND_SOC_HDMI_CODEC if SND_SOC
 	help
 	  Support for the Analog Device ADV7511(W) and ADV7513 HDMI encoders.
 
diff --git a/drivers/gpu/drm/bridge/adv7511/Makefile b/drivers/gpu/drm/bridge/adv7511/Makefile
index 9019327..ad7245d 100644
--- a/drivers/gpu/drm/bridge/adv7511/Makefile
+++ b/drivers/gpu/drm/bridge/adv7511/Makefile
@@ -1,3 +1,3 @@
-adv7511-y := adv7511_drv.o
+adv7511-y := adv7511_drv.o adv7511_audio.o
 adv7511-$(CONFIG_DRM_I2C_ADV7533) += adv7533.o
 obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511.o
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h
index c7002a0..594ee0e1 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
@@ -23,6 +23,8 @@ struct adv7511;
 
 int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet);
 int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet);
+int adv7511_audio_init(struct device *dev);
+void adv7511_audio_exit(struct device *dev);
 
 #define ADV7511_REG_CHIP_REVISION		0x00
 #define ADV7511_REG_N0				0x01
@@ -317,6 +319,8 @@ struct adv7511 {
 	struct drm_display_mode curr_mode;
 
 	unsigned int f_tmds;
+	unsigned int f_audio;
+	unsigned int audio_source;
 
 	unsigned int current_edid_segment;
 	uint8_t edid_buf[256];
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
new file mode 100644
index 0000000..5aa9809
--- /dev/null
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
@@ -0,0 +1,208 @@
+/*
+ * Analog Devices ADV7511 HDMI transmitter driver
+ *
+ * Copyright 2012 Analog Devices Inc.
+ * Copyright (c) 2016, Linaro Limited
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+#include <sound/hdmi-codec.h>
+
+#include "adv7511.h"
+
+static void adv7511_calc_cts_n(unsigned int f_tmds, unsigned int fs,
+			       unsigned int *cts, unsigned int *n)
+{
+	switch (fs) {
+	case 32000:
+		*n = 4096;
+		break;
+	case 44100:
+		*n = 6272;
+		break;
+	case 48000:
+		*n = 6144;
+		break;
+	}
+
+	*cts = ((f_tmds * *n) / (128 * fs)) * 1000;
+}
+
+static int adv7511_update_cts_n(struct adv7511 *adv7511)
+{
+	unsigned int cts = 0;
+	unsigned int n = 0;
+
+	adv7511_calc_cts_n(adv7511->f_tmds, adv7511->f_audio, &cts, &n);
+
+	regmap_write(adv7511->regmap, ADV7511_REG_N0, (n >> 16) & 0xf);
+	regmap_write(adv7511->regmap, ADV7511_REG_N1, (n >> 8) & 0xff);
+	regmap_write(adv7511->regmap, ADV7511_REG_N2, n & 0xff);
+
+	regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL0,
+		     (cts >> 16) & 0xf);
+	regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL1,
+		     (cts >> 8) & 0xff);
+	regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL2,
+		     cts & 0xff);
+
+	return 0;
+}
+
+int adv7511_hdmi_hw_params(struct device *dev, void *data,
+				struct hdmi_codec_daifmt *fmt,
+				struct hdmi_codec_params *hparms)
+{
+	struct adv7511 *adv7511 = dev_get_drvdata(dev);
+	unsigned int audio_source, i2s_format = 0;
+	unsigned int invert_clock;
+	unsigned int rate;
+	unsigned int len;
+
+	switch (hparms->sample_rate) {
+	case 32000:
+		rate = ADV7511_SAMPLE_FREQ_32000;
+		break;
+	case 44100:
+		rate = ADV7511_SAMPLE_FREQ_44100;
+		break;
+	case 48000:
+		rate = ADV7511_SAMPLE_FREQ_48000;
+		break;
+	case 88200:
+		rate = ADV7511_SAMPLE_FREQ_88200;
+		break;
+	case 96000:
+		rate = ADV7511_SAMPLE_FREQ_96000;
+		break;
+	case 176400:
+		rate = ADV7511_SAMPLE_FREQ_176400;
+		break;
+	case 192000:
+		rate = ADV7511_SAMPLE_FREQ_192000;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (hparms->sample_width) {
+	case 16:
+		len = ADV7511_I2S_SAMPLE_LEN_16;
+		break;
+	case 18:
+		len = ADV7511_I2S_SAMPLE_LEN_18;
+		break;
+	case 20:
+		len = ADV7511_I2S_SAMPLE_LEN_20;
+		break;
+	case 24:
+		len = ADV7511_I2S_SAMPLE_LEN_24;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt->fmt) {
+	case HDMI_I2S:
+		audio_source = ADV7511_AUDIO_SOURCE_I2S;
+		i2s_format = ADV7511_I2S_FORMAT_I2S;
+		break;
+	case HDMI_RIGHT_J:
+		audio_source = ADV7511_AUDIO_SOURCE_I2S;
+		i2s_format = ADV7511_I2S_FORMAT_RIGHT_J;
+		break;
+	case HDMI_LEFT_J:
+		audio_source = ADV7511_AUDIO_SOURCE_I2S;
+		i2s_format = ADV7511_I2S_FORMAT_LEFT_J;
+		break;
+//	case HDMI_SPDIF:
+//		audio_source = ADV7511_AUDIO_SOURCE_SPDIF;
+//		break;
+	default:
+		return -EINVAL;
+	}
+
+	invert_clock = fmt->bit_clk_inv;
+
+	regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_SOURCE, 0x70,
+			   audio_source << 4);
+	regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, BIT(6),
+			   invert_clock << 6);
+	regmap_update_bits(adv7511->regmap, ADV7511_REG_I2S_CONFIG, 0x03,
+			   i2s_format);
+
+	adv7511->audio_source = audio_source;
+
+	adv7511->f_audio = hparms->sample_rate;
+
+	adv7511_update_cts_n(adv7511);
+
+	regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG3,
+			   ADV7511_AUDIO_CFG3_LEN_MASK, len);
+	regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG,
+			   ADV7511_I2C_FREQ_ID_CFG_RATE_MASK, rate << 4);
+	regmap_write(adv7511->regmap, 0x73, 0x1);
+
+	return 0;
+}
+
+static void audio_startup(struct device *dev, void *data)
+{
+	struct adv7511 *adv7511 = dev_get_drvdata(dev);
+
+	regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
+				BIT(7), 0);
+
+}
+
+static void audio_shutdown(struct device *dev, void *data)
+{
+
+}
+
+static const struct hdmi_codec_ops adv7511_codec_ops = {
+	.hw_params	= adv7511_hdmi_hw_params,
+	.audio_shutdown = audio_shutdown,
+	.audio_startup	= audio_startup,
+};
+
+static struct hdmi_codec_pdata codec_data = {
+	.ops = &adv7511_codec_ops,
+	.max_i2s_channels = 2,
+	.i2s = 1,
+};
+
+static int adv7511_hdmi_register_audio_driver(struct device *dev)
+{
+	platform_device_register_data(dev,
+					HDMI_CODEC_DRV_NAME,
+					PLATFORM_DEVID_AUTO,
+					&codec_data,
+					sizeof(codec_data));
+	return 0;
+}
+
+int adv7511_audio_init(struct device *dev)
+{
+	return adv7511_hdmi_register_audio_driver(dev);
+}
+
+void adv7511_audio_exit(struct device *dev)
+{
+
+}
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index f8eb7f8..3756994 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -1037,6 +1037,9 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 		goto err_unregister_cec;
 	}
 
+	dev_set_drvdata(dev, adv7511);
+	adv7511_audio_init(dev);
+
 	return 0;
 
 err_unregister_cec:
@@ -1058,6 +1061,8 @@ static int adv7511_remove(struct i2c_client *i2c)
 
 	drm_bridge_remove(&adv7511->bridge);
 
+	adv7511_audio_exit(&i2c->dev);
+
 	i2c_unregister_device(adv7511->i2c_edid);
 
 	kfree(adv7511->edid);
-- 
1.9.1

Re: [RFC][PATCH 2/4] drm/bridge: adv7511: Add Audio support.

[Srinivas Kandagatla]

Few Minor comments below..

On 23/08/16 06:50, John Stultz wrote:
> This patch adds support to Audio for both adv7511 and adv7533
> bridge chips.
>
> This patch was originally from [1] by Lars-Peter Clausen <lars@metafoo.de>
> and was adapted by Archit Taneja <architt@codeaurora.org> and
> Srinivas Kandagatla <srinivas.kandagatla@linaro.org>.
>
> Then I heavily reworked it to use the hdmi-codec driver. So credit
> to them, but blame to me.
>
> [1] https://github.com/analogdevicesinc/linux/blob/xcomm_zynq/drivers/gpu/drm/i2c/adv7511_audio.c
>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Archit Taneja <architt@codeaurora.org>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
> Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
> Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
> Cc: Andy Green <andy@warmcat.com>
> Cc: Dave Long <dave.long@linaro.org>
> Cc: Guodong Xu <guodong.xu@linaro.org>
> Cc: Zhangfei Gao <zhangfei.gao@linaro.org>
> Cc: Mark Brown <broonie@kernel.org>
> Cc: Lars-Peter Clausen <lars@metafoo.de>
> Cc: Jose Abreu <joabreu@synopsys.com>
> Cc: dri-devel@lists.freedesktop.org
> Signed-off-by: John Stultz <john.stultz@linaro.org>
> ---
>  drivers/gpu/drm/bridge/adv7511/Kconfig         |   1 +
>  drivers/gpu/drm/bridge/adv7511/Makefile        |   2 +-
>  drivers/gpu/drm/bridge/adv7511/adv7511.h       |   4 +
>  drivers/gpu/drm/bridge/adv7511/adv7511_audio.c | 208 +++++++++++++++++++++++++
>  drivers/gpu/drm/bridge/adv7511/adv7511_drv.c   |   5 +
>  5 files changed, 219 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
>
> diff --git a/drivers/gpu/drm/bridge/adv7511/Kconfig b/drivers/gpu/drm/bridge/adv7511/Kconfig
> index d2b0499..e3975e9 100644
> --- a/drivers/gpu/drm/bridge/adv7511/Kconfig
> +++ b/drivers/gpu/drm/bridge/adv7511/Kconfig
> @@ -3,6 +3,7 @@ config DRM_I2C_ADV7511
>  	depends on OF
>  	select DRM_KMS_HELPER
>  	select REGMAP_I2C
> +	select SND_SOC_HDMI_CODEC if SND_SOC
>  	help
>  	  Support for the Analog Device ADV7511(W) and ADV7513 HDMI encoders.
>
> diff --git a/drivers/gpu/drm/bridge/adv7511/Makefile b/drivers/gpu/drm/bridge/adv7511/Makefile
> index 9019327..ad7245d 100644
> --- a/drivers/gpu/drm/bridge/adv7511/Makefile
> +++ b/drivers/gpu/drm/bridge/adv7511/Makefile
> @@ -1,3 +1,3 @@
> -adv7511-y := adv7511_drv.o
> +adv7511-y := adv7511_drv.o adv7511_audio.o
>  adv7511-$(CONFIG_DRM_I2C_ADV7533) += adv7533.o
>  obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511.o
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h
> index c7002a0..594ee0e1 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
> @@ -23,6 +23,8 @@ struct adv7511;
>
>  int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet);
>  int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet);
> +int adv7511_audio_init(struct device *dev);
> +void adv7511_audio_exit(struct device *dev);
>
>  #define ADV7511_REG_CHIP_REVISION		0x00
>  #define ADV7511_REG_N0				0x01
> @@ -317,6 +319,8 @@ struct adv7511 {
>  	struct drm_display_mode curr_mode;
>
>  	unsigned int f_tmds;
> +	unsigned int f_audio;
> +	unsigned int audio_source;
>
>  	unsigned int current_edid_segment;
>  	uint8_t edid_buf[256];
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
> new file mode 100644
> index 0000000..5aa9809
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
> @@ -0,0 +1,208 @@
> +/*
> + * Analog Devices ADV7511 HDMI transmitter driver
> + *
> + * Copyright 2012 Analog Devices Inc.
> + * Copyright (c) 2016, Linaro Limited
> + *
> + * Licensed under the GPL-2.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/moduleparam.h>
> +#include <linux/init.h>
> +#include <linux/delay.h>
> +#include <linux/pm.h>
> +#include <linux/i2c.h>
> +#include <linux/spi/spi.h>
> +#include <linux/slab.h>
> +#include <sound/core.h>
> +#include <sound/pcm.h>
> +#include <sound/pcm_params.h>
> +#include <sound/soc.h>
> +#include <sound/initval.h>
> +#include <sound/tlv.h>
> +#include <sound/hdmi-codec.h>

Looks like some of these includes are really not needed.

> +
> +#include "adv7511.h"
> +
> +static void adv7511_calc_cts_n(unsigned int f_tmds, unsigned int fs,
> +			       unsigned int *cts, unsigned int *n)
> +{
> +	switch (fs) {
> +	case 32000:
> +		*n = 4096;
> +		break;
> +	case 44100:
> +		*n = 6272;
> +		break;
> +	case 48000:
> +		*n = 6144;
> +		break;
> +	}
> +
> +	*cts = ((f_tmds * *n) / (128 * fs)) * 1000;
> +}
> +
> +static int adv7511_update_cts_n(struct adv7511 *adv7511)
> +{
> +	unsigned int cts = 0;
> +	unsigned int n = 0;
> +
> +	adv7511_calc_cts_n(adv7511->f_tmds, adv7511->f_audio, &cts, &n);
> +
> +	regmap_write(adv7511->regmap, ADV7511_REG_N0, (n >> 16) & 0xf);
> +	regmap_write(adv7511->regmap, ADV7511_REG_N1, (n >> 8) & 0xff);
> +	regmap_write(adv7511->regmap, ADV7511_REG_N2, n & 0xff);
> +
> +	regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL0,
> +		     (cts >> 16) & 0xf);
> +	regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL1,
> +		     (cts >> 8) & 0xff);
> +	regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL2,
> +		     cts & 0xff);
> +
> +	return 0;
> +}
> +
> +int adv7511_hdmi_hw_params(struct device *dev, void *data,
> +				struct hdmi_codec_daifmt *fmt,
> +				struct hdmi_codec_params *hparms)
> +{
> +	struct adv7511 *adv7511 = dev_get_drvdata(dev);
> +	unsigned int audio_source, i2s_format = 0;
> +	unsigned int invert_clock;
> +	unsigned int rate;
> +	unsigned int len;
> +
> +	switch (hparms->sample_rate) {
> +	case 32000:
> +		rate = ADV7511_SAMPLE_FREQ_32000;
> +		break;
> +	case 44100:
> +		rate = ADV7511_SAMPLE_FREQ_44100;
> +		break;
> +	case 48000:
> +		rate = ADV7511_SAMPLE_FREQ_48000;
> +		break;
> +	case 88200:
> +		rate = ADV7511_SAMPLE_FREQ_88200;
> +		break;
> +	case 96000:
> +		rate = ADV7511_SAMPLE_FREQ_96000;
> +		break;
> +	case 176400:
> +		rate = ADV7511_SAMPLE_FREQ_176400;
> +		break;
> +	case 192000:
> +		rate = ADV7511_SAMPLE_FREQ_192000;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	switch (hparms->sample_width) {
> +	case 16:
> +		len = ADV7511_I2S_SAMPLE_LEN_16;
> +		break;
> +	case 18:
> +		len = ADV7511_I2S_SAMPLE_LEN_18;
> +		break;
> +	case 20:
> +		len = ADV7511_I2S_SAMPLE_LEN_20;
> +		break;
> +	case 24:
> +		len = ADV7511_I2S_SAMPLE_LEN_24;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	switch (fmt->fmt) {
> +	case HDMI_I2S:
> +		audio_source = ADV7511_AUDIO_SOURCE_I2S;
> +		i2s_format = ADV7511_I2S_FORMAT_I2S;
> +		break;
> +	case HDMI_RIGHT_J:
> +		audio_source = ADV7511_AUDIO_SOURCE_I2S;
> +		i2s_format = ADV7511_I2S_FORMAT_RIGHT_J;
> +		break;
> +	case HDMI_LEFT_J:
> +		audio_source = ADV7511_AUDIO_SOURCE_I2S;
> +		i2s_format = ADV7511_I2S_FORMAT_LEFT_J;
> +		break;
> +//	case HDMI_SPDIF:
> +//		audio_source = ADV7511_AUDIO_SOURCE_SPDIF;
> +//		break;

> +	default:
> +		return -EINVAL;
> +	}
> +
> +	invert_clock = fmt->bit_clk_inv;
> +
> +	regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_SOURCE, 0x70,
> +			   audio_source << 4);
> +	regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, BIT(6),
> +			   invert_clock << 6);
> +	regmap_update_bits(adv7511->regmap, ADV7511_REG_I2S_CONFIG, 0x03,
> +			   i2s_format);
> +
> +	adv7511->audio_source = audio_source;
> +
> +	adv7511->f_audio = hparms->sample_rate;
> +
> +	adv7511_update_cts_n(adv7511);
> +
> +	regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG3,
> +			   ADV7511_AUDIO_CFG3_LEN_MASK, len);
> +	regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG,
> +			   ADV7511_I2C_FREQ_ID_CFG_RATE_MASK, rate << 4);
> +	regmap_write(adv7511->regmap, 0x73, 0x1);
> +
> +	return 0;
> +}
> +
> +static void audio_startup(struct device *dev, void *data)

Should be:

static int audio_startup(struct device *dev, void *data)

> +{
> +	struct adv7511 *adv7511 = dev_get_drvdata(dev);
> +
> +	regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
> +				BIT(7), 0);
> +
and a return here.

> +}
> +
> +static void audio_shutdown(struct device *dev, void *data)
> +{
> +
> +}
> +
> +static const struct hdmi_codec_ops adv7511_codec_ops = {
> +	.hw_params	= adv7511_hdmi_hw_params,
> +	.audio_shutdown = audio_shutdown,
> +	.audio_startup	= audio_startup,

We should consider adding get_eld() callback too in future.

> +};

> +
> +static struct hdmi_codec_pdata codec_data = {
> +	.ops = &adv7511_codec_ops,
> +	.max_i2s_channels = 2,
> +	.i2s = 1,
> +};
> +
> +static int adv7511_hdmi_register_audio_driver(struct device *dev)
> +{
> +	platform_device_register_data(dev,
> +					HDMI_CODEC_DRV_NAME,
> +					PLATFORM_DEVID_AUTO,
> +					&codec_data,
> +					sizeof(codec_data));
> +	return 0;
> +}
> +
> +int adv7511_audio_init(struct device *dev)
> +{
> +	return adv7511_hdmi_register_audio_driver(dev);
> +}
> +
> +void adv7511_audio_exit(struct device *dev)
> +{
> +
> +}
My be this can be removed.


> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> index f8eb7f8..3756994 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> @@ -1037,6 +1037,9 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
>  		goto err_unregister_cec;
>  	}
>
> +	dev_set_drvdata(dev, adv7511);
> +	adv7511_audio_init(dev);
> +
>  	return 0;
>
>  err_unregister_cec:
> @@ -1058,6 +1061,8 @@ static int adv7511_remove(struct i2c_client *i2c)
>
>  	drm_bridge_remove(&adv7511->bridge);
>
> +	adv7511_audio_exit(&i2c->dev);
> +
>  	i2c_unregister_device(adv7511->i2c_edid);
>
>  	kfree(adv7511->edid);
>

[RFC][PATCH 3/4] drm/bridge: adv7511: Enable the audio data and clock pads on adv7533

[John Stultz]

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

This patch enables the Audio Data and Clock pads to the adv7533 bridge.
Without this patch audio can not be played.

Cc: David Airlie <airlied@linux.ie>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Andy Green <andy@warmcat.com>
Cc: Dave Long <dave.long@linaro.org>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Zhangfei Gao <zhangfei.gao@linaro.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
 drivers/gpu/drm/bridge/adv7511/adv7533.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c
index 5eebd15..6798ecf 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7533.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c
@@ -29,6 +29,7 @@ static const struct reg_sequence adv7533_cec_fixed_registers[] = {
 	{ 0x17, 0xd0 },
 	{ 0x24, 0x20 },
 	{ 0x57, 0x11 },
+	{ 0x05, 0xc8 },
 };
 
 static const struct regmap_config adv7533_cec_regmap_config = {
-- 
1.9.1

[RFC][PATCH 4/4] drm/bridge: adv7511: Initialize audio packet on adv7533

[John Stultz]

From: Andy Green <andy.green@linaro.org>

Set the initial audio packet settings to allow the audio
driver to work.

Cc: David Airlie <airlied@linux.ie>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Andy Green <andy@warmcat.com>
Cc: Dave Long <dave.long@linaro.org>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Zhangfei Gao <zhangfei.gao@linaro.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Andy Green <andy.green@linaro.org>
[jstultz: Forward ported to mainline, changed to use register
 names rather then hex values, and removed config values set by
 audio driver.]
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
 drivers/gpu/drm/bridge/adv7511/adv7533.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c
index 6798ecf..cced7c9 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7533.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c
@@ -104,6 +104,28 @@ void adv7533_dsi_power_on(struct adv7511 *adv)
 	/* disable test mode */
 	regmap_write(adv->regmap_cec, 0x55, 0x00);
 
+	/* hide Audio infoframe updates */
+	regmap_update_bits(adv->regmap, ADV7511_REG_INFOFRAME_UPDATE,
+				BIT(5), BIT(5));
+	/* enable N/CTS, enable Audio sample packets */
+	regmap_update_bits(adv->regmap, ADV7511_REG_PACKET_ENABLE1,
+				BIT(5), BIT(5));
+	/* enable N/CTS */
+	regmap_update_bits(adv->regmap, ADV7511_REG_PACKET_ENABLE1,
+				BIT(6), BIT(6));
+	/* not copyrighted */
+	regmap_update_bits(adv->regmap, ADV7511_REG_AUDIO_CFG1,
+				BIT(5), BIT(5));
+	/* enable audio infoframes */
+	regmap_update_bits(adv->regmap, ADV7511_REG_PACKET_ENABLE1,
+				BIT(3), BIT(3));
+	/* AV mute disable */
+	regmap_update_bits(adv->regmap, ADV7511_REG_GC(0),
+				BIT(7) | BIT(6), BIT(7));
+	/* use Audio infoframe updated info */
+	regmap_update_bits(adv->regmap, ADV7511_REG_GC(1),
+				BIT(5), 0);
+
 	regmap_register_patch(adv->regmap_cec, adv7533_cec_fixed_registers,
 			      ARRAY_SIZE(adv7533_cec_fixed_registers));
 }
-- 
1.9.1

Re: [RFC][PATCH 0/4] Audio support for adv7511 hdmi bridge

[Srinivas Kandagatla]

Hi John,

On 23/08/16 06:50, John Stultz wrote:
> This is an initial swing at getting the adv7511 hdmi bridge
> audio support reviewed.
>
> I've taken the core audio work done by Lars-Peter Clausen, and
> adapted by Srinivas Kandagatla and Archit Taneja, and tried to
> rework it to use the hdmi-codec sound driver.
>
> This patchset, along with the i2s driver and dts changes allows
> HDMI audio to work on the HiKey board.
>
> I'd really appreciate any thoughts or feedback.

Thanks for putting up these patches together,

I tested them on DB410c on top of v4.8-rc3 with a dt 
patch(https://git.linaro.org/people/srinivas.kandagatla/linux.git/commit/ac06c0e91b1a0ac83a0d2946e593fcdd73836896) 
and it works great.


Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

thanks,
srini
>
> thanks
> -john
>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Archit Taneja <architt@codeaurora.org>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
> Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
> Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
> Cc: Andy Green <andy@warmcat.com>
> Cc: Dave Long <dave.long@linaro.org>
> Cc: Guodong Xu <guodong.xu@linaro.org>
> Cc: Zhangfei Gao <zhangfei.gao@linaro.org>
> Cc: Mark Brown <broonie@kernel.org>
> Cc: Lars-Peter Clausen <lars@metafoo.de>
> Cc: Jose Abreu <joabreu@synopsys.com>
> Cc: dri-devel@lists.freedesktop.org
> Andy Green (1):
>   drm/bridge: adv7511: Initialize audio packet on adv7533
>
> Archit Taneja (1):
>   drm/bridge: adv7511: Move the common data structures to header file
>
> John Stultz (1):
>   drm/bridge: adv7511: Add Audio support.
>
> Srinivas Kandagatla (1):
>   drm/bridge: adv7511: Enable the audio data and clock pads on adv7533
>
>  drivers/gpu/drm/bridge/adv7511/Kconfig         |   1 +
>  drivers/gpu/drm/bridge/adv7511/Makefile        |   2 +-
>  drivers/gpu/drm/bridge/adv7511/adv7511.h       |  12 ++
>  drivers/gpu/drm/bridge/adv7511/adv7511_audio.c | 208 +++++++++++++++++++++++++
>  drivers/gpu/drm/bridge/adv7511/adv7511_drv.c   |   9 +-
>  drivers/gpu/drm/bridge/adv7511/adv7533.c       |  23 +++
>  6 files changed, 252 insertions(+), 3 deletions(-)
>  create mode 100644 drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
>