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Message-ID: <584B25D9.4080106@linaro.org>
Date: Fri, 9 Dec 2016 16:44:57 -0500
From: David Long <dave.long@...aro.org>
To: John Stultz <john.stultz@...aro.org>,
lkml <linux-kernel@...r.kernel.org>
Cc: David Airlie <airlied@...ux.ie>,
Archit Taneja <architt@...eaurora.org>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Wolfram Sang <wsa+renesas@...g-engineering.com>,
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
Ville Syrjälä <ville.syrjala@...ux.intel.com>,
Boris Brezillon <boris.brezillon@...e-electrons.com>,
Andy Green <andy@...mcat.com>,
Guodong Xu <guodong.xu@...aro.org>,
Zhangfei Gao <zhangfei.gao@...aro.org>,
Mark Brown <broonie@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>,
Jose Abreu <joabreu@...opsys.com>,
Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
dri-devel@...ts.freedesktop.org
Subject: Re: [RESEND x3][PATCH 1/2 v4] drm/bridge: adv7511: Add Audio support.
On 11/28/2016 08:22 PM, 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@...afoo.de>
> and was adapted by Archit Taneja <architt@...eaurora.org> and
> Srinivas Kandagatla <srinivas.kandagatla@...aro.org>.
>
> Then I heavily reworked it to use the hdmi-codec driver. And also
> folded in some audio packet initialization done by Andy Green
> <andy.green@...aro.org>. 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@...ux.ie>
> Cc: Archit Taneja <architt@...eaurora.org>
> Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>
> Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> Cc: "Ville Syrjälä" <ville.syrjala@...ux.intel.com>
> Cc: Boris Brezillon <boris.brezillon@...e-electrons.com>
> Cc: Andy Green <andy@...mcat.com>
> Cc: Dave Long <dave.long@...aro.org>
> Cc: Guodong Xu <guodong.xu@...aro.org>
> Cc: Zhangfei Gao <zhangfei.gao@...aro.org>
> Cc: Mark Brown <broonie@...nel.org>
> Cc: Lars-Peter Clausen <lars@...afoo.de>
> Cc: Jose Abreu <joabreu@...opsys.com>
> Cc: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
> Cc: dri-devel@...ts.freedesktop.org
> Reviewed-by: Archit Taneja <architt@...eaurora.org>
> Acked-by: Lars-Peter Clausen <lars@...afoo.de>
> Signed-off-by: John Stultz <john.stultz@...aro.org>
> ---
> v4:
> * Kconfig tweaks suggested by Lars-Peter Clausen
> v3:
> * Allowed audio support to be configured in or out, as suggested by Laurent
> * Minor cleanups suggested by Laurent
> * Folded in Andy's audio packet initialization patch, as suggested by Archit
> ---
> drivers/gpu/drm/bridge/adv7511/Kconfig | 8 +
> drivers/gpu/drm/bridge/adv7511/Makefile | 1 +
> drivers/gpu/drm/bridge/adv7511/adv7511.h | 16 ++
> drivers/gpu/drm/bridge/adv7511/adv7511_audio.c | 213 +++++++++++++++++++++++++
> drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 4 +
> 5 files changed, 242 insertions(+)
> 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..2fed567 100644
> --- a/drivers/gpu/drm/bridge/adv7511/Kconfig
> +++ b/drivers/gpu/drm/bridge/adv7511/Kconfig
> @@ -6,6 +6,14 @@ config DRM_I2C_ADV7511
> help
> Support for the Analog Device ADV7511(W) and ADV7513 HDMI encoders.
>
> +config DRM_I2C_ADV7511_AUDIO
> + bool "ADV7511 HDMI Audio driver"
> + depends on DRM_I2C_ADV7511 && SND_SOC
> + select SND_SOC_HDMI_CODEC
> + help
> + Support the ADV7511 HDMI Audio interface. This is used in
> + conjunction with the AV7511 HDMI driver.
> +
> config DRM_I2C_ADV7533
> bool "ADV7533 encoder"
> depends on DRM_I2C_ADV7511
> diff --git a/drivers/gpu/drm/bridge/adv7511/Makefile b/drivers/gpu/drm/bridge/adv7511/Makefile
> index 9019327..5ba6755 100644
> --- a/drivers/gpu/drm/bridge/adv7511/Makefile
> +++ b/drivers/gpu/drm/bridge/adv7511/Makefile
> @@ -1,3 +1,4 @@
> adv7511-y := adv7511_drv.o
> +adv7511-$(CONFIG_DRM_I2C_ADV7511_AUDIO) += adv7511_audio.o
> adv7511-$(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 161c923..992d76c 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
> @@ -309,6 +309,8 @@ 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];
> @@ -334,6 +336,7 @@ struct adv7511 {
> bool use_timing_gen;
>
> enum adv7511_type type;
> + struct platform_device *audio_pdev;
> };
>
> #ifdef CONFIG_DRM_I2C_ADV7533
> @@ -389,4 +392,17 @@ static inline int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv)
> }
> #endif
>
> +#ifdef CONFIG_DRM_I2C_ADV7511_AUDIO
> +int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511);
> +void adv7511_audio_exit(struct adv7511 *adv7511);
> +#else /*CONFIG_DRM_I2C_ADV7511_AUDIO */
> +static inline int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511)
> +{
> + return 0;
> +}
> +static inline void adv7511_audio_exit(struct adv7511 *adv7511)
> +{
> +}
> +#endif /* CONFIG_DRM_I2C_ADV7511_AUDIO */
> +
> #endif /* __DRM_I2C_ADV7511_H__ */
> 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..5ce29a5
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
> @@ -0,0 +1,213 @@
> +/*
> + * Analog Devices ADV7511 HDMI transmitter driver
> + *
> + * Copyright 2012 Analog Devices Inc.
> + * Copyright (c) 2016, Linaro Limited
> + *
> + * Licensed under the GPL-2.
> + */
> +
> +#include <sound/core.h>
> +#include <sound/hdmi-codec.h>
> +#include <sound/pcm.h>
> +#include <sound/soc.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;
> + 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 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);
> +
> + /* hide Audio infoframe updates */
> + regmap_update_bits(adv7511->regmap, ADV7511_REG_INFOFRAME_UPDATE,
> + BIT(5), BIT(5));
> + /* enable N/CTS, enable Audio sample packets */
> + regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
> + BIT(5), BIT(5));
> + /* enable N/CTS */
> + regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
> + BIT(6), BIT(6));
> + /* not copyrighted */
> + regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG1,
> + BIT(5), BIT(5));
> + /* enable audio infoframes */
> + regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
> + BIT(3), BIT(3));
> + /* AV mute disable */
> + regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(0),
> + BIT(7) | BIT(6), BIT(7));
> + /* use Audio infoframe updated info */
> + regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(1),
> + BIT(5), 0);
> + return 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,
> +};
> +
> +int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511)
> +{
> + adv7511->audio_pdev = platform_device_register_data(dev,
> + HDMI_CODEC_DRV_NAME,
> + PLATFORM_DEVID_AUTO,
> + &codec_data,
> + sizeof(codec_data));
> + return PTR_ERR_OR_ZERO(adv7511->audio_pdev);
> +}
> +
> +void adv7511_audio_exit(struct adv7511 *adv7511)
> +{
> + if (adv7511->audio_pdev) {
> + platform_device_unregister(adv7511->audio_pdev);
> + adv7511->audio_pdev = NULL;
> + }
> +}
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> index 8ed3906..8dba729 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> @@ -1037,6 +1037,8 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
> goto err_unregister_cec;
> }
>
> + adv7511_audio_init(dev, adv7511);
> +
> return 0;
>
> err_unregister_cec:
> @@ -1058,6 +1060,8 @@ static int adv7511_remove(struct i2c_client *i2c)
>
> drm_bridge_remove(&adv7511->bridge);
>
> + adv7511_audio_exit(adv7511);
> +
> i2c_unregister_device(adv7511->i2c_edid);
>
> kfree(adv7511->edid);
>
Tested-by: David A. Long <dave.long@...aro.org>
-dl
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