From: Kuninori Morimoto <[email protected]>
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 <[email protected]>
Signed-off-by: Kuninori Morimoto <[email protected]>
---
v3 -> v4
- use IS_ERR() instead of IS_ERR_OR_NULL() on probe()
drivers/gpu/drm/bridge/Kconfig | 8 ++
drivers/gpu/drm/bridge/Makefile | 1 +
drivers/gpu/drm/bridge/dw-hdmi-audio.h | 7 ++
drivers/gpu/drm/bridge/dw-hdmi-i2s-audio.c | 142 +++++++++++++++++++++++++++++
drivers/gpu/drm/bridge/dw-hdmi.c | 22 ++++-
drivers/gpu/drm/bridge/dw-hdmi.h | 21 +++++
6 files changed, 199 insertions(+), 2 deletions(-)
create mode 100644 drivers/gpu/drm/bridge/dw-hdmi-i2s-audio.c
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 10e12e7..3129f8d 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -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
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index cdf3a3c..9a54f2a 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -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_SII902X) += sii902x.o
diff --git a/drivers/gpu/drm/bridge/dw-hdmi-audio.h b/drivers/gpu/drm/bridge/dw-hdmi-audio.h
index 91f631b..fd1f745 100644
--- a/drivers/gpu/drm/bridge/dw-hdmi-audio.h
+++ b/drivers/gpu/drm/bridge/dw-hdmi-audio.h
@@ -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
diff --git a/drivers/gpu/drm/bridge/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/dw-hdmi-i2s-audio.c
new file mode 100644
index 0000000..79391c0
--- /dev/null
+++ b/drivers/gpu/drm/bridge/dw-hdmi-i2s-audio.c
@@ -0,0 +1,142 @@
+/*
+ * dw-hdmi-i2s-audio.c
+ *
+ * Copyright (c) 2016 Kuninori Morimoto <[email protected]>
+ *
+ * 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 <[email protected]>");
+MODULE_DESCRIPTION("Synopsis Designware HDMI I2S ALSA SoC interface");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/gpu/drm/bridge/dw-hdmi.c b/drivers/gpu/drm/bridge/dw-hdmi.c
index ab7023e..30a2e16 100644
--- a/drivers/gpu/drm/bridge/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/dw-hdmi.c
@@ -1639,10 +1639,11 @@ 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)
@@ -1770,7 +1771,12 @@ 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;
@@ -1782,6 +1788,18 @@ 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);
}
dev_set_drvdata(dev, hdmi);
diff --git a/drivers/gpu/drm/bridge/dw-hdmi.h b/drivers/gpu/drm/bridge/dw-hdmi.h
index fc9a560..c8bdbf2 100644
--- a/drivers/gpu/drm/bridge/dw-hdmi.h
+++ b/drivers/gpu/drm/bridge/dw-hdmi.h
@@ -545,6 +545,10 @@
#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,
@@ -887,6 +891,17 @@ 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,
@@ -901,6 +916,12 @@ 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,
--
1.9.1
On Tue, Nov 08, 2016 at 01:00:57AM +0000, Kuninori Morimoto wrote:
>
> From: Kuninori Morimoto <[email protected]>
>
> 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 <[email protected]>
> Signed-off-by: Kuninori Morimoto <[email protected]>
> ---
> v3 -> v4
>
> - use IS_ERR() instead of IS_ERR_OR_NULL() on probe()
Thanks, that looks good now.
> @@ -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);
> +};
Another slight concern here is why we need this separate data for i2s -
maybe adding the write/read ops to struct dw_hdmi_audio_data would be
a better thing to do, which would then allow the AHB audio to drop
the .base argument in the future.
I'm not that bothered about this though. So...
Acked-by: Russell King <[email protected]>
Thanks.
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
Hi Russell
> > @@ -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);
> > +};
>
> Another slight concern here is why we need this separate data for i2s -
> maybe adding the write/read ops to struct dw_hdmi_audio_data would be
> a better thing to do, which would then allow the AHB audio to drop
> the .base argument in the future.
>
> I'm not that bothered about this though. So...
Thank you for your feedback.
Maybe we can merge these in incremental patch if needed ?
Hi Archit, David, and DRM ML
I had heared that Archit is the maintainer of dw-hdmi driver, but am I wrong ??
I'm posting this patch series since half year ago, but no response
from him, and nothing happen (I got review from Russell though).
Is Archit really maintainer ??
OTOH, get_maintainer.pl indicates David is the maintainer ?
What should I do for this patch ??
> Hi Russell
>
> > > @@ -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);
> > > +};
> >
> > Another slight concern here is why we need this separate data for i2s -
> > maybe adding the write/read ops to struct dw_hdmi_audio_data would be
> > a better thing to do, which would then allow the AHB audio to drop
> > the .base argument in the future.
> >
> > I'm not that bothered about this though. So...
>
> Thank you for your feedback.
> Maybe we can merge these in incremental patch if needed ?
>
Hi,
On 11/24/2016 10:43 AM, Kuninori Morimoto wrote:
>
> Hi Archit, David, and DRM ML
>
> I had heared that Archit is the maintainer of dw-hdmi driver, but am I wrong ??
> I'm posting this patch series since half year ago, but no response
> from him, and nothing happen (I got review from Russell though).
> Is Archit really maintainer ??
> OTOH, get_maintainer.pl indicates David is the maintainer ?
> What should I do for this patch ??
I'm not the maintainer of the dw-hdmi driver, but I pull in the
changes that go into drm/bridge/
Will pull this.
Thanks,
Archit
>
>> Hi Russell
>>
>>>> @@ -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);
>>>> +};
>>>
>>> Another slight concern here is why we need this separate data for i2s -
>>> maybe adding the write/read ops to struct dw_hdmi_audio_data would be
>>> a better thing to do, which would then allow the AHB audio to drop
>>> the .base argument in the future.
>>>
>>> I'm not that bothered about this though. So...
>>
>> Thank you for your feedback.
>> Maybe we can merge these in incremental patch if needed ?
>>
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
Hi Archit
> > I had heared that Archit is the maintainer of dw-hdmi driver, but am I wrong ??
> > I'm posting this patch series since half year ago, but no response
> > from him, and nothing happen (I got review from Russell though).
> > Is Archit really maintainer ??
> > OTOH, get_maintainer.pl indicates David is the maintainer ?
> > What should I do for this patch ??
>
> I'm not the maintainer of the dw-hdmi driver, but I pull in the
> changes that go into drm/bridge/
>
> Will pull this.
Thanks a lot !!