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drm: bridge: add DesignWare HDMI I2S audio support

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Current dw-hdmi is supporting sound via AHB bus, but it has
I2S audio feature too. This patch adds I2S audio support to dw-hdmi.
This HDMI I2S is supported by using ALSA SoC common HDMI encoder
driver.

Tested-by: Jose Abreu <joabreu@synopsys.com>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/8737j2bxba.wl%kuninori.morimoto.gx@renesas.com
This commit is contained in:
Kuninori Morimoto 2016-11-08 01:00:57 +00:00 committed by Archit Taneja
parent 2db86dfcef
commit 2761ba6c09
6 changed files with 197 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/bridge/Kconfig
View File

@ -39,6 +39,14 @@ config DRM_DW_HDMI_AHB_AUDIO
Designware HDMI block. This is used in conjunction with
the i.MX6 HDMI driver.
config DRM_DW_HDMI_I2S_AUDIO
tristate "Synopsis Designware I2S Audio interface"
depends on DRM_DW_HDMI
select SND_SOC_HDMI_CODEC
help
Support the I2S Audio interface which is part of the Synopsis
Designware HDMI block.
config DRM_NXP_PTN3460
tristate "NXP PTN3460 DP/LVDS bridge"
depends on OF

1
drivers/gpu/drm/bridge/Makefile
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@ -4,6 +4,7 @@ obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o
obj-$(CONFIG_DRM_DUMB_VGA_DAC) += dumb-vga-dac.o
obj-$(CONFIG_DRM_DW_HDMI) += dw-hdmi.o
obj-$(CONFIG_DRM_DW_HDMI_AHB_AUDIO) += dw-hdmi-ahb-audio.o
obj-$(CONFIG_DRM_DW_HDMI_I2S_AUDIO) += dw-hdmi-i2s-audio.o
obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o

7
drivers/gpu/drm/bridge/dw-hdmi-audio.h
View File

@ -11,4 +11,11 @@ struct dw_hdmi_audio_data {
u8 *eld;
};
struct dw_hdmi_i2s_audio_data {
struct dw_hdmi *hdmi;
void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
u8 (*read)(struct dw_hdmi *hdmi, int offset);
};
#endif

141
drivers/gpu/drm/bridge/dw-hdmi-i2s-audio.c Normal file
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@ -0,0 +1,141 @@
/*
* dw-hdmi-i2s-audio.c
*
* Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* 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 <drm/bridge/dw_hdmi.h>
#include <sound/hdmi-codec.h>
#include "dw-hdmi.h"
#include "dw-hdmi-audio.h"
#define DRIVER_NAME "dw-hdmi-i2s-audio"
static inline void hdmi_write(struct dw_hdmi_i2s_audio_data *audio,
u8 val, int offset)
{
struct dw_hdmi *hdmi = audio->hdmi;
audio->write(hdmi, val, offset);
}
static inline u8 hdmi_read(struct dw_hdmi_i2s_audio_data *audio, int offset)
{
struct dw_hdmi *hdmi = audio->hdmi;
return audio->read(hdmi, offset);
}
static int dw_hdmi_i2s_hw_params(struct device *dev, void *data,
struct hdmi_codec_daifmt *fmt,
struct hdmi_codec_params *hparms)
{
struct dw_hdmi_i2s_audio_data *audio = data;
struct dw_hdmi *hdmi = audio->hdmi;
u8 conf0 = 0;
u8 conf1 = 0;
u8 inputclkfs = 0;
/* it cares I2S only */
if ((fmt->fmt != HDMI_I2S) ||
(fmt->bit_clk_master | fmt->frame_clk_master)) {
dev_err(dev, "unsupported format/settings\n");
return -EINVAL;
}
inputclkfs = HDMI_AUD_INPUTCLKFS_64FS;
conf0 = HDMI_AUD_CONF0_I2S_ALL_ENABLE;
switch (hparms->sample_width) {
case 16:
conf1 = HDMI_AUD_CONF1_WIDTH_16;
break;
case 24:
case 32:
conf1 = HDMI_AUD_CONF1_WIDTH_24;
break;
}
dw_hdmi_set_sample_rate(hdmi, hparms->sample_rate);
hdmi_write(audio, inputclkfs, HDMI_AUD_INPUTCLKFS);
hdmi_write(audio, conf0, HDMI_AUD_CONF0);
hdmi_write(audio, conf1, HDMI_AUD_CONF1);
dw_hdmi_audio_enable(hdmi);
return 0;
}
static void dw_hdmi_i2s_audio_shutdown(struct device *dev, void *data)
{
struct dw_hdmi_i2s_audio_data *audio = data;
struct dw_hdmi *hdmi = audio->hdmi;
dw_hdmi_audio_disable(hdmi);
hdmi_write(audio, HDMI_AUD_CONF0_SW_RESET, HDMI_AUD_CONF0);
}
static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
.hw_params = dw_hdmi_i2s_hw_params,
.audio_shutdown = dw_hdmi_i2s_audio_shutdown,
};
static int snd_dw_hdmi_probe(struct platform_device *pdev)
{
struct dw_hdmi_i2s_audio_data *audio = pdev->dev.platform_data;
struct platform_device_info pdevinfo;
struct hdmi_codec_pdata pdata;
struct platform_device *platform;
pdata.ops = &dw_hdmi_i2s_ops;
pdata.i2s = 1;
pdata.max_i2s_channels = 6;
pdata.data = audio;
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.parent = pdev->dev.parent;
pdevinfo.id = PLATFORM_DEVID_AUTO;
pdevinfo.name = HDMI_CODEC_DRV_NAME;
pdevinfo.data = &pdata;
pdevinfo.size_data = sizeof(pdata);
pdevinfo.dma_mask = DMA_BIT_MASK(32);
platform = platform_device_register_full(&pdevinfo);
if (IS_ERR(platform))
return PTR_ERR(platform);
dev_set_drvdata(&pdev->dev, platform);
return 0;
}
static int snd_dw_hdmi_remove(struct platform_device *pdev)
{
struct platform_device *platform = dev_get_drvdata(&pdev->dev);
platform_device_unregister(platform);
return 0;
}
static struct platform_driver snd_dw_hdmi_driver = {
.probe = snd_dw_hdmi_probe,
.remove = snd_dw_hdmi_remove,
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
},
};
module_platform_driver(snd_dw_hdmi_driver);
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
MODULE_DESCRIPTION("Synopsis Designware HDMI I2S ALSA SoC interface");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRIVER_NAME);

22
drivers/gpu/drm/bridge/dw-hdmi.c
View File

@ -1871,10 +1871,11 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
struct device_node *np = dev->of_node;
struct platform_device_info pdevinfo;
struct device_node *ddc_node;
struct dw_hdmi_audio_data audio;
struct dw_hdmi *hdmi;
int ret;
u32 val = 1;
u8 config0;
u8 config1;
hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
if (!hdmi)
@ -2011,7 +2012,12 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
pdevinfo.parent = dev;
pdevinfo.id = PLATFORM_DEVID_AUTO;
if (hdmi_readb(hdmi, HDMI_CONFIG1_ID) & HDMI_CONFIG1_AHB) {
config0 = hdmi_readb(hdmi, HDMI_CONFIG0_ID);
config1 = hdmi_readb(hdmi, HDMI_CONFIG1_ID);
if (config1 & HDMI_CONFIG1_AHB) {
struct dw_hdmi_audio_data audio;
audio.phys = iores->start;
audio.base = hdmi->regs;
audio.irq = irq;
@ -2023,6 +2029,18 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
pdevinfo.size_data = sizeof(audio);
pdevinfo.dma_mask = DMA_BIT_MASK(32);
hdmi->audio = platform_device_register_full(&pdevinfo);
} else if (config0 & HDMI_CONFIG0_I2S) {
struct dw_hdmi_i2s_audio_data audio;
audio.hdmi = hdmi;
audio.write = hdmi_writeb;
audio.read = hdmi_readb;
pdevinfo.name = "dw-hdmi-i2s-audio";
pdevinfo.data = &audio;
pdevinfo.size_data = sizeof(audio);
pdevinfo.dma_mask = DMA_BIT_MASK(32);
hdmi->audio = platform_device_register_full(&pdevinfo);
}
/* Reset HDMI DDC I2C master controller and mute I2CM interrupts */

20
drivers/gpu/drm/bridge/dw-hdmi.h
View File

@ -545,6 +545,9 @@
#define HDMI_I2CM_FS_SCL_LCNT_0_ADDR 0x7E12
enum {
/* CONFIG0_ID field values */
HDMI_CONFIG0_I2S = 0x10,
/* CONFIG1_ID field values */
HDMI_CONFIG1_AHB = 0x01,
@ -891,6 +894,17 @@ enum {
HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL = 0x08,
HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_MASK = 0x04,
/* AUD_CONF0 field values */
HDMI_AUD_CONF0_SW_RESET = 0x80,
HDMI_AUD_CONF0_I2S_ALL_ENABLE = 0x2F,
/* AUD_CONF1 field values */
HDMI_AUD_CONF1_MODE_I2S = 0x00,
HDMI_AUD_CONF1_MODE_RIGHT_J = 0x02,
HDMI_AUD_CONF1_MODE_LEFT_J = 0x04,
HDMI_AUD_CONF1_WIDTH_16 = 0x10,
HDMI_AUD_CONF1_WIDTH_24 = 0x18,
/* AUD_CTS3 field values */
HDMI_AUD_CTS3_N_SHIFT_OFFSET = 5,
HDMI_AUD_CTS3_N_SHIFT_MASK = 0xe0,
@ -905,6 +919,12 @@ enum {
HDMI_AUD_CTS3_CTS_MANUAL = 0x10,
HDMI_AUD_CTS3_AUDCTS19_16_MASK = 0x0f,
/* HDMI_AUD_INPUTCLKFS field values */
HDMI_AUD_INPUTCLKFS_128FS = 0,
HDMI_AUD_INPUTCLKFS_256FS = 1,
HDMI_AUD_INPUTCLKFS_512FS = 2,
HDMI_AUD_INPUTCLKFS_64FS = 4,
/* AHB_DMA_CONF0 field values */
HDMI_AHB_DMA_CONF0_SW_FIFO_RST_OFFSET = 7,
HDMI_AHB_DMA_CONF0_SW_FIFO_RST_MASK = 0x80,