[PATCH v2 0/5] drm/bridge: sii902x: HDMI-audio support and some fixes

[PATCH v2 0/5] drm/bridge: sii902x: HDMI-audio support and some fixes

[Jyri Sarha]

Changes since first version:
- Moved reviewed patches to front:
  - drm/bridge: sii902x: add input_bus_flags
  - drm/bridge: sii902x: Set output mode to HDMI or DVI according to EDID
  - drm/bridge: sii902x: pixel clock unit is 10kHz instead of 1kHz
- Added a new fix:
  - drm/bridge: sii902x: Select I2C_MUX
- Applied some review suggestions to
  - drm/bridge: sii902x: Implement HDMI audio support
    - use clock-names property to name mclk
    - move comment describing added mutex to struct sii902x and improve it
    - cleanup sii902x_mute()
    - cleanup sii902x_select_mclk_div()
    - fix condition for checking ENABLE_BIT from i2s_fifo_routing in
      sii902x_audio_codec_init()

Still to do

- Agree on i2s wires to HDMI audio fifo routing in dts. 

  The current scheme is quite straight forward, but there is maybe
  there is even more straight forward solutions like:

  audio-fifo-enable = <1 1 1 1>;
  audio-i2s-pin-to-fifo = <0 1 2 3>;

  Meaning that all fifos are enabled and SD0 is routed to fifo 0, SD1
  to fifo 1, etc. I am not sure if the channel swap functionality
  should show in dts binding.

Jyri Sarha (4):
  drm/bridge: sii902x: Set output mode to HDMI or DVI according to EDID
  drm/bridge: sii902x: pixel clock unit is 10kHz instead of 1kHz
  drm/bridge: sii902x: Select I2C_MUX
  drm/bridge: sii902x: Implement HDMI audio support

Tomi Valkeinen (1):
  drm/bridge: sii902x: add input_bus_flags

 .../bindings/display/bridge/sii902x.txt       |  36 +-
 drivers/gpu/drm/bridge/Kconfig                |   1 +
 drivers/gpu/drm/bridge/sii902x.c              | 472 +++++++++++++++++-
 include/dt-bindings/sound/sii902x-audio.h     |  11 +
 4 files changed, 512 insertions(+), 8 deletions(-)
 create mode 100644 include/dt-bindings/sound/sii902x-audio.h

-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v2 1/5] drm/bridge: sii902x: add input_bus_flags

[Jyri Sarha]

From: Tomi Valkeinen <tomi.valkeinen@ti.com>

The driver always sets InputBusFmt:EDGE to 0 (falling edge).

Add drm_bridge_timings's input_bus_flags to reflect that the bridge
samples on falling edges.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
---
 drivers/gpu/drm/bridge/sii902x.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index bfa902013aa4..1afa000141d5 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -459,6 +459,12 @@ static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
 	return 0;
 }
 
+static const struct drm_bridge_timings default_sii902x_timings = {
+	.input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE
+		 | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
+		 | DRM_BUS_FLAG_DE_HIGH,
+};
+
 static int sii902x_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
@@ -529,6 +535,7 @@ static int sii902x_probe(struct i2c_client *client,
 
 	sii902x->bridge.funcs = &sii902x_bridge_funcs;
 	sii902x->bridge.of_node = dev->of_node;
+	sii902x->bridge.timings = &default_sii902x_timings;
 	drm_bridge_add(&sii902x->bridge);
 
 	i2c_set_clientdata(client, sii902x);
-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v2 1/5] drm/bridge: sii902x: add input_bus_flags

[Laurent Pinchart]

Hi Jyri,

Thank you for the patch.

On Wed, Feb 27, 2019 at 11:54:19PM +0200, Jyri Sarha wrote:
> From: Tomi Valkeinen <tomi.valkeinen@ti.com>
> 
> The driver always sets InputBusFmt:EDGE to 0 (falling edge).
> 
> Add drm_bridge_timings's input_bus_flags to reflect that the bridge
> samples on falling edges.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Signed-off-by: Jyri Sarha <jsarha@ti.com>
> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  drivers/gpu/drm/bridge/sii902x.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
> index bfa902013aa4..1afa000141d5 100644
> --- a/drivers/gpu/drm/bridge/sii902x.c
> +++ b/drivers/gpu/drm/bridge/sii902x.c
> @@ -459,6 +459,12 @@ static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
>  	return 0;
>  }
>  
> +static const struct drm_bridge_timings default_sii902x_timings = {
> +	.input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE
> +		 | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
> +		 | DRM_BUS_FLAG_DE_HIGH,
> +};
> +

Should you add a comment where the drive sets the EDGE bit to 0 to state
that default_sii902x_timings should then be made dynamic ? I suppose it
would be hard to miss that though, so maybe it's overkill. In any case,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

>  static int sii902x_probe(struct i2c_client *client,
>  			 const struct i2c_device_id *id)
>  {
> @@ -529,6 +535,7 @@ static int sii902x_probe(struct i2c_client *client,
>  
>  	sii902x->bridge.funcs = &sii902x_bridge_funcs;
>  	sii902x->bridge.of_node = dev->of_node;
> +	sii902x->bridge.timings = &default_sii902x_timings;
>  	drm_bridge_add(&sii902x->bridge);
>  
>  	i2c_set_clientdata(client, sii902x);

-- 
Regards,

Laurent Pinchart
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v2 2/5] drm/bridge: sii902x: Set output mode to HDMI or DVI according to EDID

[Jyri Sarha]

Set output mode to HDMI or DVI according to EDID HDMI signature.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
---
 drivers/gpu/drm/bridge/sii902x.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index 1afa000141d5..0e21fa419d27 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -181,11 +181,15 @@ static int sii902x_get_modes(struct drm_connector *connector)
 	struct sii902x *sii902x = connector_to_sii902x(connector);
 	u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 	struct edid *edid;
+	u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI;
 	int num = 0, ret;
 
 	edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
 	drm_connector_update_edid_property(connector, edid);
 	if (edid) {
+	        if (drm_detect_hdmi_monitor(edid))
+			output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI;
+
 		num = drm_add_edid_modes(connector, edid);
 		kfree(edid);
 	}
@@ -195,6 +199,11 @@ static int sii902x_get_modes(struct drm_connector *connector)
 	if (ret)
 		return ret;
 
+	ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
+				 SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
+	if (ret)
+		return ret;
+
 	return num;
 }
 
-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v2 2/5] drm/bridge: sii902x: Set output mode to HDMI or DVI according to EDID

[Laurent Pinchart]

Hi Jyri,

Thank you for the patch.
On Wed, Feb 27, 2019 at 11:54:20PM +0200, Jyri Sarha wrote:
> Set output mode to HDMI or DVI according to EDID HDMI signature.
> 
> Signed-off-by: Jyri Sarha <jsarha@ti.com>
> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
> ---
>  drivers/gpu/drm/bridge/sii902x.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
> index 1afa000141d5..0e21fa419d27 100644
> --- a/drivers/gpu/drm/bridge/sii902x.c
> +++ b/drivers/gpu/drm/bridge/sii902x.c
> @@ -181,11 +181,15 @@ static int sii902x_get_modes(struct drm_connector *connector)
>  	struct sii902x *sii902x = connector_to_sii902x(connector);
>  	u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
>  	struct edid *edid;
> +	u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI;

I'd move this one line up, but that's certainly a matter of taste :-)
>  	int num = 0, ret;
>  
>  	edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
>  	drm_connector_update_edid_property(connector, edid);
>  	if (edid) {
> +	        if (drm_detect_hdmi_monitor(edid))
> +			output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI;
> +
>  		num = drm_add_edid_modes(connector, edid);
>  		kfree(edid);
>  	}
> @@ -195,6 +199,11 @@ static int sii902x_get_modes(struct drm_connector *connector)
>  	if (ret)
>  		return ret;
>  
> +	ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
> +				 SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
> +	if (ret)
> +		return ret;
> +

Is this the right place to update the register, shouldn't this be done
in sii902x_bridge_enable() instead ? I could foresee cases where the
chip could be powered down between get_modes() and enable(), losing its
internal state.

>  	return num;
>  }
>  

-- 
Regards,

Laurent Pinchart
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v2 2/5] drm/bridge: sii902x: Set output mode to HDMI or DVI according to EDID

[Jyri Sarha]

On 04/03/2019 14:52, Laurent Pinchart wrote:
> Hi Jyri,
> 
> Thank you for the patch.
> On Wed, Feb 27, 2019 at 11:54:20PM +0200, Jyri Sarha wrote:
>> Set output mode to HDMI or DVI according to EDID HDMI signature.
>>
>> Signed-off-by: Jyri Sarha <jsarha@ti.com>
>> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
>> ---
>>  drivers/gpu/drm/bridge/sii902x.c | 9 +++++++++
>>  1 file changed, 9 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
>> index 1afa000141d5..0e21fa419d27 100644
>> --- a/drivers/gpu/drm/bridge/sii902x.c
>> +++ b/drivers/gpu/drm/bridge/sii902x.c
>> @@ -181,11 +181,15 @@ static int sii902x_get_modes(struct drm_connector *connector)
>>  	struct sii902x *sii902x = connector_to_sii902x(connector);
>>  	u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
>>  	struct edid *edid;
>> +	u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI;
> 
> I'd move this one line up, but that's certainly a matter of taste :-)

I usually sort the local variables by length too. I wonder why I did not
do it this time... I'll fix it :).

>>  	int num = 0, ret;
>>  
>>  	edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
>>  	drm_connector_update_edid_property(connector, edid);
>>  	if (edid) {
>> +	        if (drm_detect_hdmi_monitor(edid))
>> +			output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI;
>> +
>>  		num = drm_add_edid_modes(connector, edid);
>>  		kfree(edid);
>>  	}
>> @@ -195,6 +199,11 @@ static int sii902x_get_modes(struct drm_connector *connector)
>>  	if (ret)
>>  		return ret;
>>  
>> +	ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
>> +				 SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
>> +	if (ret)
>> +		return ret;
>> +
> 
> Is this the right place to update the register, shouldn't this be done
> in sii902x_bridge_enable() instead ? I could foresee cases where the
> chip could be powered down between get_modes() and enable(), losing its
> internal state.
> 

I have a spec (unfortunately I can not share it) that describes the
sequence of handling a hot plug event on sii9022. There it is said that
the HDMI mode, if HDMI signature is found, should be set at the same
time while releasing the DCC access by setting SII902X_SYS_CTRL_DATA
bits #1 and #2 to zero.

However, I did not dare to change sii902x_i2c_bypass_deselect()
function, so I set the HDMI mode right after the DCC pass trough mode is
disabled.

Having it there is logical too, since the HDMI/DVI-mode should not
change without a hot plug event. In practice sii9022 does not appear to
be too picky when the bit is set.

>>  	return num;
>>  }
>>  
> 


-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v2 3/5] drm/bridge: sii902x: pixel clock unit is 10kHz instead of 1kHz

[Jyri Sarha]

The pixel clock unit in the first two registers (0x00 and 0x01) of
sii9022 is 10kHz, not 1kHz as in struct drm_display_mode. Division by
10 fixes the issue.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
---
 drivers/gpu/drm/bridge/sii902x.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index 0e21fa419d27..1e917777ed72 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -248,10 +248,11 @@ static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
 	struct regmap *regmap = sii902x->regmap;
 	u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
 	struct hdmi_avi_infoframe frame;
+	u16 pixel_clock_10kHz = adj->clock / 10;
 	int ret;
 
-	buf[0] = adj->clock;
-	buf[1] = adj->clock >> 8;
+	buf[0] = pixel_clock_10kHz & 0xFF;
+	buf[1] = pixel_clock_10kHz >> 8;
 	buf[2] = adj->vrefresh;
 	buf[3] = 0x00;
 	buf[4] = adj->hdisplay;
-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v2 3/5] drm/bridge: sii902x: pixel clock unit is 10kHz instead of 1kHz

[Laurent Pinchart]

Hi Jyri,

Thank you for the patch.

On Wed, Feb 27, 2019 at 11:54:21PM +0200, Jyri Sarha wrote:
> The pixel clock unit in the first two registers (0x00 and 0x01) of
> sii9022 is 10kHz, not 1kHz as in struct drm_display_mode. Division by
> 10 fixes the issue.
> 
> Signed-off-by: Jyri Sarha <jsarha@ti.com>
> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
> ---
>  drivers/gpu/drm/bridge/sii902x.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
> index 0e21fa419d27..1e917777ed72 100644
> --- a/drivers/gpu/drm/bridge/sii902x.c
> +++ b/drivers/gpu/drm/bridge/sii902x.c
> @@ -248,10 +248,11 @@ static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
>  	struct regmap *regmap = sii902x->regmap;
>  	u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
>  	struct hdmi_avi_infoframe frame;
> +	u16 pixel_clock_10kHz = adj->clock / 10;
>  	int ret;
>  
> -	buf[0] = adj->clock;
> -	buf[1] = adj->clock >> 8;
> +	buf[0] = pixel_clock_10kHz & 0xFF;

Nitpicking, we usually use lowercase hex values.

Apart from that,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> +	buf[1] = pixel_clock_10kHz >> 8;
>  	buf[2] = adj->vrefresh;
>  	buf[3] = 0x00;
>  	buf[4] = adj->hdisplay;

-- 
Regards,

Laurent Pinchart
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v2 4/5] drm/bridge: sii902x: Select I2C_MUX

[Jyri Sarha]

"drm/bridge/sii902x: Fix EDID readback"-commit added a dependency to
I2C_MUX, but not indicate it in the Kconfig entry. Fix it by selecting
I2C_MUX for DRM_SII902X config option.

Fixes: 88664675239 ("drm/bridge/sii902x: Fix EDID readback")
Signed-off-by: Jyri Sarha <jsarha@ti.com>
---
 drivers/gpu/drm/bridge/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index fb0b37918382..a6f6ff8f06b3 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -95,6 +95,7 @@ config DRM_SII902X
 	depends on OF
 	select DRM_KMS_HELPER
 	select REGMAP_I2C
+	select I2C_MUX
 	---help---
 	  Silicon Image sii902x bridge chip driver.
 
-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v2 4/5] drm/bridge: sii902x: Select I2C_MUX

[Andrzej Hajda]

On 27.02.2019 22:54, Jyri Sarha wrote:
> "drm/bridge/sii902x: Fix EDID readback"-commit added a dependency to
> I2C_MUX, but not indicate it in the Kconfig entry. Fix it by selecting
> I2C_MUX for DRM_SII902X config option.
>
> Fixes: 88664675239 ("drm/bridge/sii902x: Fix EDID readback")
> Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>

 --
Regards
Andrzej
> ---
>  drivers/gpu/drm/bridge/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> index fb0b37918382..a6f6ff8f06b3 100644
> --- a/drivers/gpu/drm/bridge/Kconfig
> +++ b/drivers/gpu/drm/bridge/Kconfig
> @@ -95,6 +95,7 @@ config DRM_SII902X
>  	depends on OF
>  	select DRM_KMS_HELPER
>  	select REGMAP_I2C
> +	select I2C_MUX
>  	---help---
>  	  Silicon Image sii902x bridge chip driver.
>  


_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v2 4/5] drm/bridge: sii902x: Select I2C_MUX

[Laurent Pinchart]

Hi Jyri,

Thank you for the patch.

On Wed, Feb 27, 2019 at 11:54:22PM +0200, Jyri Sarha wrote:
> "drm/bridge/sii902x: Fix EDID readback"-commit added a dependency to
> I2C_MUX, but not indicate it in the Kconfig entry. Fix it by selecting
> I2C_MUX for DRM_SII902X config option.
> 
> Fixes: 88664675239 ("drm/bridge/sii902x: Fix EDID readback")
> Signed-off-by: Jyri Sarha <jsarha@ti.com>
> ---
>  drivers/gpu/drm/bridge/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> index fb0b37918382..a6f6ff8f06b3 100644
> --- a/drivers/gpu/drm/bridge/Kconfig
> +++ b/drivers/gpu/drm/bridge/Kconfig
> @@ -95,6 +95,7 @@ config DRM_SII902X
>  	depends on OF
>  	select DRM_KMS_HELPER
>  	select REGMAP_I2C
> +	select I2C_MUX
>  	---help---
>  	  Silicon Image sii902x bridge chip driver.
>  

This is already present in v5.0.

commit ea6b13e9fed0fda9532ee04d38ed1bef1edbfdbf
Author: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Date:   Mon Nov 19 13:26:18 2018 +0000

    drm/bridge/sii902x: Add missing dependency on I2C_MUX

Fabrizio stated in the commit message that "Quite obviously the driver
depends on I2C_MUX, but adding a "depends on" introduces a recursive
dependency, therefore this patch selects I2C_MUX instead.". Given that
I2C_MUX is a tristate user-selectable option, "depend on" should be the
right solution. I wonder if we could fix the root cause of the recursive
dependency.

-- 
Regards,

Laurent Pinchart
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v2 5/5] drm/bridge: sii902x: Implement HDMI audio support

[Jyri Sarha]

Implement HDMI audio support by using ASoC HDMI codec. The commit
implements the necessary callbacks and configuration for the HDMI
codec and registers a virtual platform device for the codec to attach.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
---
 .../bindings/display/bridge/sii902x.txt       |  36 +-
 drivers/gpu/drm/bridge/sii902x.c              | 453 +++++++++++++++++-
 include/dt-bindings/sound/sii902x-audio.h     |  11 +
 3 files changed, 493 insertions(+), 7 deletions(-)
 create mode 100644 include/dt-bindings/sound/sii902x-audio.h

diff --git a/Documentation/devicetree/bindings/display/bridge/sii902x.txt b/Documentation/devicetree/bindings/display/bridge/sii902x.txt
index 72d2dc6c3e6b..647b2fd84db9 100644
--- a/Documentation/devicetree/bindings/display/bridge/sii902x.txt
+++ b/Documentation/devicetree/bindings/display/bridge/sii902x.txt
@@ -5,9 +5,32 @@ Required properties:
 	- reg: i2c address of the bridge
 
 Optional properties:
-	- interrupts: describe the interrupt line used to inform the host 
+	- interrupts: describe the interrupt line used to inform the host
 	  about hotplug events.
 	- reset-gpios: OF device-tree gpio specification for RST_N pin.
+	- i2s-fifo-routing: Array of exactly 4 integers indicating i2s
+	  pins for audio fifo routing. First integer defines routing to
+	  fifo 0 and second to fifo 1, etc. Integers can be filled with
+	  definitions from: include/dt-bindings/sound/sii902x-audio.h
+	  The available definitions are:
+	  - ENABLE_BIT:	enable this audio fifo
+	  - CONNECT_SD#: route audio input from SD0, SD1, SD2, or SD3 i2s
+			 data input pin
+	  - LEFT_RIGHT_SWAP_BIT: swap i2s input channels for this fifo
+	  I2S HDMI audio is configured only if this property is found.
+	- clocks: phandle mclk
+	- clock-names: "mclk"
+	    Describes SII902x MCLK input. MCLK is used to produce
+	    HDMI audio CTS values. This property is required if
+	    "i2s-fifo-routing"-property is present. This property follows
+	    Documentation/devicetree/bindings/clock/clock-bindings.txt
+	    consumer binding.
+	- #sound-dai-cells = <0>: ASoC codec dai available for simple-card
+	    If audio properties are present sii902x provides an ASoC
+	    codec component driver that can be used by other ASoC
+	    components like simple-card. See binding document for
+	    details:
+	    Documentation/devicetree/bindings/sound/simple-card.txt
 
 Optional subnodes:
 	- video input: this subnode can contain a video input port node
@@ -21,6 +44,17 @@ Example:
 		compatible = "sil,sii9022";
 		reg = <0x39>;
 		reset-gpios = <&pioA 1 0>;
+
+		#sound-dai-cells = <0>;
+		i2s-fifo-routing = <
+			(ENABLE_BIT|CONNECT_SD0)
+			0
+			0
+			0
+		>;
+		clocks = <&mclk>;
+		clock-names = "mclk";
+
 		ports {
 			#address-cells = <1>;
 			#size-cells = <0>;
diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index 1e917777ed72..2be27bc54fb5 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -27,12 +27,16 @@
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/regmap.h>
+#include <linux/clk.h>
 
 #include <drm/drmP.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_edid.h>
 
+#include <sound/hdmi-codec.h>
+#include <dt-bindings/sound/sii902x-audio.h>
+
 #define SII902X_TPI_VIDEO_DATA			0x0
 
 #define SII902X_TPI_PIXEL_REPETITION		0x8
@@ -74,6 +78,77 @@
 #define SII902X_AVI_POWER_STATE_MSK		GENMASK(1, 0)
 #define SII902X_AVI_POWER_STATE_D(l)		((l) & SII902X_AVI_POWER_STATE_MSK)
 
+/* Audio  */
+#define SII902X_TPI_I2S_ENABLE_MAPPING_REG	0x1f
+#define SII902X_TPI_I2S_CONFIG_FIFO0			(0 << 0)
+#define SII902X_TPI_I2S_CONFIG_FIFO1			(1 << 0)
+#define SII902X_TPI_I2S_CONFIG_FIFO2			(2 << 0)
+#define SII902X_TPI_I2S_CONFIG_FIFO3			(3 << 0)
+#define SII902X_TPI_I2S_LEFT_RIGHT_SWAP			(1 << 2)
+#define SII902X_TPI_I2S_AUTO_DOWNSAMPLE			(1 << 3)
+#define SII902X_TPI_I2S_SELECT_SD0			(0 << 4)
+#define SII902X_TPI_I2S_SELECT_SD1			(1 << 4)
+#define SII902X_TPI_I2S_SELECT_SD2			(2 << 4)
+#define SII902X_TPI_I2S_SELECT_SD3			(3 << 4)
+#define SII902X_TPI_I2S_FIFO_ENABLE			(1 << 7)
+
+#define SII902X_TPI_I2S_INPUT_CONFIG_REG	0x20
+#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES		(0 << 0)
+#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_NO		(1 << 0)
+#define SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST		(0 << 1)
+#define SII902X_TPI_I2S_SD_DIRECTION_LSB_FIRST		(1 << 1)
+#define SII902X_TPI_I2S_SD_JUSTIFY_LEFT			(0 << 2)
+#define SII902X_TPI_I2S_SD_JUSTIFY_RIGHT		(1 << 2)
+#define SII902X_TPI_I2S_WS_POLARITY_LOW			(0 << 3)
+#define SII902X_TPI_I2S_WS_POLARITY_HIGH		(1 << 3)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_128		(0 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_256		(1 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_384		(2 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_512		(3 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_768		(4 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1024		(5 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1152		(6 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_192		(7 << 4)
+#define SII902X_TPI_I2S_SCK_EDGE_FALLING		(0 << 7)
+#define SII902X_TPI_I2S_SCK_EDGE_RISING			(1 << 7)
+
+#define SII902X_TPI_I2S_STRM_HDR_BASE	0x21
+#define SII902X_TPI_I2S_STRM_HDR_SIZE	5
+
+#define SII902X_TPI_AUDIO_CONFIG_BYTE2_REG	0x26
+#define SII902X_TPI_AUDIO_CODING_STREAM_HEADER		(0 << 0)
+#define SII902X_TPI_AUDIO_CODING_PCM			(1 << 0)
+#define SII902X_TPI_AUDIO_CODING_AC3			(2 << 0)
+#define SII902X_TPI_AUDIO_CODING_MPEG1			(3 << 0)
+#define SII902X_TPI_AUDIO_CODING_MP3			(4 << 0)
+#define SII902X_TPI_AUDIO_CODING_MPEG2			(5 << 0)
+#define SII902X_TPI_AUDIO_CODING_AAC			(6 << 0)
+#define SII902X_TPI_AUDIO_CODING_DTS			(7 << 0)
+#define SII902X_TPI_AUDIO_CODING_ATRAC			(8 << 0)
+#define SII902X_TPI_AUDIO_MUTE_DISABLE			(0 << 4)
+#define SII902X_TPI_AUDIO_MUTE_ENABLE			(1 << 4)
+#define SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS		(0 << 5)
+#define SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS		(1 << 5)
+#define SII902X_TPI_AUDIO_INTERFACE_DISABLE		(0 << 6)
+#define SII902X_TPI_AUDIO_INTERFACE_SPDIF		(1 << 6)
+#define SII902X_TPI_AUDIO_INTERFACE_I2S			(2 << 6)
+
+#define SII902X_TPI_AUDIO_CONFIG_BYTE3_REG	0x27
+#define SII902X_TPI_AUDIO_FREQ_STREAM			(0 << 3)
+#define SII902X_TPI_AUDIO_FREQ_32KHZ			(1 << 3)
+#define SII902X_TPI_AUDIO_FREQ_44KHZ			(2 << 3)
+#define SII902X_TPI_AUDIO_FREQ_48KHZ			(3 << 3)
+#define SII902X_TPI_AUDIO_FREQ_88KHZ			(4 << 3)
+#define SII902X_TPI_AUDIO_FREQ_96KHZ			(5 << 3)
+#define SII902X_TPI_AUDIO_FREQ_176KHZ			(6 << 3)
+#define SII902X_TPI_AUDIO_FREQ_192KHZ			(7 << 3)
+#define SII902X_TPI_AUDIO_SAMPLE_SIZE_STREAM		(0 << 6)
+#define SII902X_TPI_AUDIO_SAMPLE_SIZE_16		(1 << 6)
+#define SII902X_TPI_AUDIO_SAMPLE_SIZE_20		(2 << 6)
+#define SII902X_TPI_AUDIO_SAMPLE_SIZE_24		(3 << 6)
+
+#define SII902X_TPI_AUDIO_CONFIG_BYTE4_REG	0x28
+
 #define SII902X_INT_ENABLE			0x3c
 #define SII902X_INT_STATUS			0x3d
 #define SII902X_HOTPLUG_EVENT			BIT(0)
@@ -81,6 +156,16 @@
 
 #define SII902X_REG_TPI_RQB			0xc7
 
+/* Indirect internal register access */
+#define SII902X_IND_SET_PAGE			0xbc
+#define SII902X_IND_OFFSET			0xbd
+#define SII902X_IND_VALUE			0xbe
+
+#define SII902X_TPI_MISC_INFOFRAME_BASE		0xbf
+#define SII902X_TPI_MISC_INFOFRAME_END		0xde
+#define SII902X_TPI_MISC_INFOFRAME_SIZE	\
+	(SII902X_TPI_MISC_INFOFRAME_END - SII902X_TPI_MISC_INFOFRAME_BASE)
+
 #define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS	500
 
 struct sii902x {
@@ -90,6 +175,16 @@ struct sii902x {
 	struct drm_connector connector;
 	struct gpio_desc *reset_gpio;
 	struct i2c_mux_core *i2cmux;
+	/*
+	 * Mutex protects audio and video functions from interfering
+	 * each other, by keeping their i2c command sequences atomic.
+	 */
+	struct mutex mutex;
+	struct sii902x_audio {
+		struct platform_device *pdev;
+		struct clk *mclk;
+		u32 i2s_fifo_routing[4];
+	} audio;
 };
 
 static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val)
@@ -161,8 +256,12 @@ sii902x_connector_detect(struct drm_connector *connector, bool force)
 	struct sii902x *sii902x = connector_to_sii902x(connector);
 	unsigned int status;
 
+	mutex_lock(&sii902x->mutex);
+
 	regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
 
+	mutex_unlock(&sii902x->mutex);
+
 	return (status & SII902X_PLUGGED_STATUS) ?
 	       connector_status_connected : connector_status_disconnected;
 }
@@ -184,6 +283,8 @@ static int sii902x_get_modes(struct drm_connector *connector)
 	u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI;
 	int num = 0, ret;
 
+	mutex_lock(&sii902x->mutex);
+
 	edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
 	drm_connector_update_edid_property(connector, edid);
 	if (edid) {
@@ -197,14 +298,19 @@ static int sii902x_get_modes(struct drm_connector *connector)
 	ret = drm_display_info_set_bus_formats(&connector->display_info,
 					       &bus_format, 1);
 	if (ret)
-		return ret;
+		goto error_out;
 
 	ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
 				 SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
 	if (ret)
-		return ret;
+		goto error_out;
+
+	ret = num;
+
+error_out:
+	mutex_unlock(&sii902x->mutex);
 
-	return num;
+	return ret;
 }
 
 static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector,
@@ -224,20 +330,28 @@ static void sii902x_bridge_disable(struct drm_bridge *bridge)
 {
 	struct sii902x *sii902x = bridge_to_sii902x(bridge);
 
+	mutex_lock(&sii902x->mutex);
+
 	regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
 			   SII902X_SYS_CTRL_PWR_DWN,
 			   SII902X_SYS_CTRL_PWR_DWN);
+
+	mutex_unlock(&sii902x->mutex);
 }
 
 static void sii902x_bridge_enable(struct drm_bridge *bridge)
 {
 	struct sii902x *sii902x = bridge_to_sii902x(bridge);
 
+	mutex_lock(&sii902x->mutex);
+
 	regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL,
 			   SII902X_AVI_POWER_STATE_MSK,
 			   SII902X_AVI_POWER_STATE_D(0));
 	regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
 			   SII902X_SYS_CTRL_PWR_DWN, 0);
+
+	mutex_unlock(&sii902x->mutex);
 }
 
 static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
@@ -264,26 +378,31 @@ static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
 	buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO |
 		 SII902X_TPI_AVI_INPUT_COLORSPACE_RGB;
 
+	mutex_lock(&sii902x->mutex);
+
 	ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10);
 	if (ret)
-		return;
+		goto out;
 
 	ret = drm_hdmi_avi_infoframe_from_display_mode(&frame, adj, false);
 	if (ret < 0) {
 		DRM_ERROR("couldn't fill AVI infoframe\n");
-		return;
+		goto out;
 	}
 
 	ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
 	if (ret < 0) {
 		DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
-		return;
+		goto out;
 	}
 
 	/* Do not send the infoframe header, but keep the CRC field. */
 	regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME,
 			  buf + HDMI_INFOFRAME_HEADER_SIZE - 1,
 			  HDMI_AVI_INFOFRAME_SIZE + 1);
+
+out:
+	mutex_unlock(&sii902x->mutex);
 }
 
 static int sii902x_bridge_attach(struct drm_bridge *bridge)
@@ -324,6 +443,323 @@ static const struct drm_bridge_funcs sii902x_bridge_funcs = {
 	.enable = sii902x_bridge_enable,
 };
 
+static int sii902x_mute(struct sii902x *sii902x, bool mute)
+{
+	struct device *dev = &sii902x->i2c->dev;
+	unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE :
+		SII902X_TPI_AUDIO_MUTE_DISABLE;
+
+	dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted");
+
+	return regmap_update_bits(sii902x->regmap,
+				  SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
+				  SII902X_TPI_AUDIO_MUTE_ENABLE, val);
+}
+
+static const unsigned int sii902x_mclk_div_table[] = {
+	128, 256, 384, 512, 768, 1024, 1152, 192 };
+
+static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate,
+				   unsigned int mclk)
+{
+	unsigned int div = mclk / rate;
+	int distance = 100000;
+	u8 i, nearest = 0;
+
+	for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) {
+		unsigned int d = abs(div - sii902x_mclk_div_table[i]);
+
+		if (d >= distance)
+			continue;
+
+		nearest = i;
+		distance = d;
+		if (d == 0)
+			break;
+	}
+
+	*i2s_config_reg |= nearest << 4;
+
+	if (distance != 0)
+		return sii902x_mclk_div_table[nearest];
+
+	return 0;
+}
+
+static const struct sii902x_sample_freq {
+	u32 freq;
+	u8 val;
+} sii902x_sample_freq[] = {
+	{ .freq = 32000,	.val = SII902X_TPI_AUDIO_FREQ_32KHZ },
+	{ .freq = 44000,	.val = SII902X_TPI_AUDIO_FREQ_44KHZ },
+	{ .freq = 48000,	.val = SII902X_TPI_AUDIO_FREQ_48KHZ },
+	{ .freq = 88000,	.val = SII902X_TPI_AUDIO_FREQ_88KHZ },
+	{ .freq = 96000,	.val = SII902X_TPI_AUDIO_FREQ_96KHZ },
+	{ .freq = 176000,	.val = SII902X_TPI_AUDIO_FREQ_176KHZ },
+	{ .freq = 192000,	.val = SII902X_TPI_AUDIO_FREQ_192KHZ },
+};
+
+static int sii902x_audio_hw_params(struct device *dev, void *data,
+				   struct hdmi_codec_daifmt *daifmt,
+				   struct hdmi_codec_params *params)
+{
+	struct sii902x *sii902x = dev_get_drvdata(dev);
+	u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST;
+	u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S |
+			       SII902X_TPI_AUDIO_MUTE_ENABLE |
+			       SII902X_TPI_AUDIO_CODING_PCM);
+	u8 config_byte3_reg = 0;
+	u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)];
+	unsigned long mclk_rate;
+	int i, ret;
+
+	if (daifmt->bit_clk_master || daifmt->frame_clk_master) {
+		dev_dbg(dev, "%s: I2S master mode not supported\n", __func__);
+		return -EINVAL;
+	}
+
+	switch (daifmt->fmt) {
+	case HDMI_I2S:
+		i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES |
+			SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
+		break;
+	case HDMI_RIGHT_J:
+		i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT;
+		break;
+	case HDMI_LEFT_J:
+		i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
+		break;
+	default:
+		dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__,
+			daifmt->fmt);
+		return -EINVAL;
+	}
+
+	if (daifmt->bit_clk_inv)
+		i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING;
+	else
+		i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING;
+
+	if (daifmt->frame_clk_inv)
+		i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW;
+	else
+		i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH;
+
+	if (params->channels > 2)
+		config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS;
+	else
+		config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS;
+
+	switch (params->sample_width) {
+	case 16:
+		config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16;
+		break;
+	case 20:
+		config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20;
+		break;
+	case 24:
+	case 32:
+		config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24;
+		break;
+	default:
+		dev_err(dev, "%s: Unsupported sample width %u\n", __func__,
+			params->sample_width);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) {
+		if (params->sample_rate == sii902x_sample_freq[i].freq) {
+			config_byte3_reg |= sii902x_sample_freq[i].val;
+			break;
+		}
+	}
+
+	mclk_rate = clk_get_rate(sii902x->audio.mclk);
+
+	ret = sii902x_select_mclk_div(&i2s_config_reg, params->sample_rate,
+				      mclk_rate);
+	if (ret)
+		dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n",
+			mclk_rate, ret, params->sample_rate);
+
+	ret = clk_prepare_enable(sii902x->audio.mclk);
+	if (ret) {
+		dev_err(dev, "Enabling mclk failed: %d\n", ret);
+		return ret;
+	}
+
+	mutex_lock(&sii902x->mutex);
+
+	ret = regmap_write(sii902x->regmap,
+			   SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
+			   config_byte2_reg);
+	if (ret < 0)
+		goto out;
+
+	ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG,
+			   i2s_config_reg);
+	if (ret)
+		goto out;
+
+	for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_routing); i++)
+		regmap_write(sii902x->regmap,
+			     SII902X_TPI_I2S_ENABLE_MAPPING_REG,
+			     sii902x->audio.i2s_fifo_routing[i]);
+
+	ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG,
+			   config_byte3_reg);
+	if (ret)
+		goto out;
+
+	ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE,
+				params->iec.status,
+				min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE,
+				    sizeof(params->iec.status)));
+	if (ret)
+		goto out;
+
+	ret = hdmi_audio_infoframe_pack(&params->cea, infoframe_buf,
+					sizeof(infoframe_buf));
+	if (ret < 0) {
+		dev_err(dev, "%s: Failed to pack audio infoframe: %d\n",
+			__func__, ret);
+		goto out;
+	}
+
+	ret = regmap_bulk_write(sii902x->regmap,
+				SII902X_TPI_MISC_INFOFRAME_BASE,
+				infoframe_buf,
+				min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE));
+	if (ret)
+		goto out;
+
+	/* Decode Level 0 Packets */
+	ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02);
+	if (ret)
+		goto out;
+
+	ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24);
+	if (ret)
+		goto out;
+
+	ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02);
+	if (ret)
+		goto out;
+
+	dev_dbg(dev, "%s: hdmi audio enabled\n", __func__);
+out:
+	mutex_unlock(&sii902x->mutex);
+
+	if (ret) {
+		clk_disable_unprepare(sii902x->audio.mclk);
+		dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__,
+			ret);
+	}
+
+	return ret;
+}
+
+static void sii902x_audio_shutdown(struct device *dev, void *data)
+{
+	struct sii902x *sii902x = dev_get_drvdata(dev);
+
+	mutex_lock(&sii902x->mutex);
+
+	regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
+		     SII902X_TPI_AUDIO_INTERFACE_DISABLE);
+
+	mutex_unlock(&sii902x->mutex);
+
+	clk_disable_unprepare(sii902x->audio.mclk);
+}
+
+int sii902x_audio_digital_mute(struct device *dev, void *data, bool enable)
+{
+	struct sii902x *sii902x = dev_get_drvdata(dev);
+
+	mutex_lock(&sii902x->mutex);
+
+	sii902x_mute(sii902x, enable);
+
+	mutex_unlock(&sii902x->mutex);
+
+	return 0;
+}
+
+static int sii902x_audio_get_eld(struct device *dev, void *data,
+				 uint8_t *buf, size_t len)
+{
+	struct sii902x *sii902x = dev_get_drvdata(dev);
+
+	mutex_lock(&sii902x->mutex);
+
+	memcpy(buf, sii902x->connector.eld,
+	       min(sizeof(sii902x->connector.eld), len));
+
+	mutex_unlock(&sii902x->mutex);
+
+	return 0;
+}
+
+static const struct hdmi_codec_ops sii902x_audio_codec_ops = {
+	.hw_params = sii902x_audio_hw_params,
+	.audio_shutdown = sii902x_audio_shutdown,
+	.digital_mute = sii902x_audio_digital_mute,
+	.get_eld = sii902x_audio_get_eld,
+};
+
+static int sii902x_audio_codec_init(struct sii902x *sii902x,
+				    struct device *dev)
+{
+	static const u8 i2s_fifo_defaults[] = {
+		SII902X_TPI_I2S_CONFIG_FIFO0,
+		SII902X_TPI_I2S_CONFIG_FIFO1,
+		SII902X_TPI_I2S_CONFIG_FIFO2,
+		SII902X_TPI_I2S_CONFIG_FIFO3,
+	};
+	struct hdmi_codec_pdata codec_data = {
+		.ops = &sii902x_audio_codec_ops,
+		.i2s = 1, /* Only i2s support for now. */
+		.spdif = 0,
+		.max_i2s_channels = 0,
+	};
+	int ret, i;
+
+	ret = of_property_read_u32_array(dev->of_node, "i2s-fifo-routing",
+					 sii902x->audio.i2s_fifo_routing,
+					 ARRAY_SIZE(sii902x->audio.i2s_fifo_routing));
+
+	if (ret != 0) {
+		if (ret == -EINVAL)
+			dev_dbg(dev, "%s: No \"i2s-fifo-routing\", no audio\n",
+			__func__);
+		else
+			dev_err(dev,
+				"%s: Error gettin \"i2s-fifo-routing\": %d\n",
+				__func__, ret);
+		return 0;
+	}
+
+	sii902x->audio.mclk = devm_clk_get(dev, "mclk");
+	if (IS_ERR(sii902x->audio.mclk)) {
+		dev_err(dev, "%s: No clock (audio mclk) found: %ld\n",
+			__func__, PTR_ERR(sii902x->audio.mclk));
+		return 0;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_routing); i++) {
+		if (sii902x->audio.i2s_fifo_routing[i] & ENABLE_BIT)
+			codec_data.max_i2s_channels += 2;
+		sii902x->audio.i2s_fifo_routing[i] |= i2s_fifo_defaults[i];
+	}
+
+	sii902x->audio.pdev = platform_device_register_data(
+		dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
+		&codec_data, sizeof(codec_data));
+
+	return PTR_ERR_OR_ZERO(sii902x->audio.pdev);
+}
+
 static const struct regmap_range sii902x_volatile_ranges[] = {
 	{ .range_min = 0, .range_max = 0xff },
 };
@@ -336,6 +772,7 @@ static const struct regmap_access_table sii902x_volatile_table = {
 static const struct regmap_config sii902x_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
+	.max_register = SII902X_TPI_MISC_INFOFRAME_END,
 	.volatile_table = &sii902x_volatile_table,
 	.cache_type = REGCACHE_NONE,
 };
@@ -508,6 +945,8 @@ static int sii902x_probe(struct i2c_client *client,
 		return PTR_ERR(sii902x->reset_gpio);
 	}
 
+	mutex_init(&sii902x->mutex);
+
 	sii902x_reset(sii902x);
 
 	ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
@@ -548,6 +987,8 @@ static int sii902x_probe(struct i2c_client *client,
 	sii902x->bridge.timings = &default_sii902x_timings;
 	drm_bridge_add(&sii902x->bridge);
 
+	sii902x_audio_codec_init(sii902x, dev);
+
 	i2c_set_clientdata(client, sii902x);
 
 	sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev,
diff --git a/include/dt-bindings/sound/sii902x-audio.h b/include/dt-bindings/sound/sii902x-audio.h
new file mode 100644
index 000000000000..32e50a926b6f
--- /dev/null
+++ b/include/dt-bindings/sound/sii902x-audio.h
@@ -0,0 +1,11 @@
+#ifndef __DT_SII9022_AUDIO_H
+#define __DT_SII9022_AUDIO_H
+
+#define ENABLE_BIT			0x80
+#define CONNECT_SD0			0x00
+#define CONNECT_SD1			0x10
+#define CONNECT_SD2			0x20
+#define CONNECT_SD3			0x30
+#define LEFT_RIGHT_SWAP_BIT		0x04
+
+#endif /* __DT_SII9022_AUDIO_H */
-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v2 5/5] drm/bridge: sii902x: Implement HDMI audio support

[Andrzej Hajda]

On 27.02.2019 22:54, Jyri Sarha wrote:
> Implement HDMI audio support by using ASoC HDMI codec. The commit
> implements the necessary callbacks and configuration for the HDMI
> codec and registers a virtual platform device for the codec to attach.
>
> Signed-off-by: Jyri Sarha <jsarha@ti.com>
> ---
>  .../bindings/display/bridge/sii902x.txt       |  36 +-
>  drivers/gpu/drm/bridge/sii902x.c              | 453 +++++++++++++++++-
>  include/dt-bindings/sound/sii902x-audio.h     |  11 +
>  3 files changed, 493 insertions(+), 7 deletions(-)
>  create mode 100644 include/dt-bindings/sound/sii902x-audio.h
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/sii902x.txt b/Documentation/devicetree/bindings/display/bridge/sii902x.txt
> index 72d2dc6c3e6b..647b2fd84db9 100644
> --- a/Documentation/devicetree/bindings/display/bridge/sii902x.txt
> +++ b/Documentation/devicetree/bindings/display/bridge/sii902x.txt
> @@ -5,9 +5,32 @@ Required properties:
>  	- reg: i2c address of the bridge
>  
>  Optional properties:
> -	- interrupts: describe the interrupt line used to inform the host 
> +	- interrupts: describe the interrupt line used to inform the host
>  	  about hotplug events.
>  	- reset-gpios: OF device-tree gpio specification for RST_N pin.
> +	- i2s-fifo-routing: Array of exactly 4 integers indicating i2s
> +	  pins for audio fifo routing. First integer defines routing to
> +	  fifo 0 and second to fifo 1, etc. Integers can be filled with
> +	  definitions from: include/dt-bindings/sound/sii902x-audio.h
> +	  The available definitions are:
> +	  - ENABLE_BIT:	enable this audio fifo
> +	  - CONNECT_SD#: route audio input from SD0, SD1, SD2, or SD3 i2s
> +			 data input pin
> +	  - LEFT_RIGHT_SWAP_BIT: swap i2s input channels for this fifo
> +	  I2S HDMI audio is configured only if this property is found.
> +	- clocks: phandle mclk
> +	- clock-names: "mclk"
> +	    Describes SII902x MCLK input. MCLK is used to produce
> +	    HDMI audio CTS values. This property is required if
> +	    "i2s-fifo-routing"-property is present. This property follows
> +	    Documentation/devicetree/bindings/clock/clock-bindings.txt
> +	    consumer binding.
> +	- #sound-dai-cells = <0>: ASoC codec dai available for simple-card
> +	    If audio properties are present sii902x provides an ASoC
> +	    codec component driver that can be used by other ASoC
> +	    components like simple-card. See binding document for
> +	    details:
> +	    Documentation/devicetree/bindings/sound/simple-card.txt


I am not an audio expert, so please forgive me if I make stupid mistakes :)

As I wrote previously, lack of DT connection between the bridge and the
audio producer looks for me as incomplete binding - hardware connection
is neither discoverable neither represented in DT. As I understand it
works because there is usually only one sound subsystem per board, and
there is only one hdmi output. Am I right?

But I guess boards with more than one hdmi output are not uncommon, how
do you discover topology in such case?


Regards

Andrzej


>  
>  Optional subnodes:
>  	- video input: this subnode can contain a video input port node
> @@ -21,6 +44,17 @@ Example:
>  		compatible = "sil,sii9022";
>  		reg = <0x39>;
>  		reset-gpios = <&pioA 1 0>;
> +
> +		#sound-dai-cells = <0>;
> +		i2s-fifo-routing = <
> +			(ENABLE_BIT|CONNECT_SD0)
> +			0
> +			0
> +			0
> +		>;
> +		clocks = <&mclk>;
> +		clock-names = "mclk";
> +
>  		ports {
>  			#address-cells = <1>;
>  			#size-cells = <0>;
> diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
> index 1e917777ed72..2be27bc54fb5 100644
> --- a/drivers/gpu/drm/bridge/sii902x.c
> +++ b/drivers/gpu/drm/bridge/sii902x.c
> @@ -27,12 +27,16 @@
>  #include <linux/i2c.h>
>  #include <linux/module.h>
>  #include <linux/regmap.h>
> +#include <linux/clk.h>
>  
>  #include <drm/drmP.h>
>  #include <drm/drm_atomic_helper.h>
>  #include <drm/drm_crtc_helper.h>
>  #include <drm/drm_edid.h>
>  
> +#include <sound/hdmi-codec.h>
> +#include <dt-bindings/sound/sii902x-audio.h>
> +
>  #define SII902X_TPI_VIDEO_DATA			0x0
>  
>  #define SII902X_TPI_PIXEL_REPETITION		0x8
> @@ -74,6 +78,77 @@
>  #define SII902X_AVI_POWER_STATE_MSK		GENMASK(1, 0)
>  #define SII902X_AVI_POWER_STATE_D(l)		((l) & SII902X_AVI_POWER_STATE_MSK)
>  
> +/* Audio  */
> +#define SII902X_TPI_I2S_ENABLE_MAPPING_REG	0x1f
> +#define SII902X_TPI_I2S_CONFIG_FIFO0			(0 << 0)
> +#define SII902X_TPI_I2S_CONFIG_FIFO1			(1 << 0)
> +#define SII902X_TPI_I2S_CONFIG_FIFO2			(2 << 0)
> +#define SII902X_TPI_I2S_CONFIG_FIFO3			(3 << 0)
> +#define SII902X_TPI_I2S_LEFT_RIGHT_SWAP			(1 << 2)
> +#define SII902X_TPI_I2S_AUTO_DOWNSAMPLE			(1 << 3)
> +#define SII902X_TPI_I2S_SELECT_SD0			(0 << 4)
> +#define SII902X_TPI_I2S_SELECT_SD1			(1 << 4)
> +#define SII902X_TPI_I2S_SELECT_SD2			(2 << 4)
> +#define SII902X_TPI_I2S_SELECT_SD3			(3 << 4)
> +#define SII902X_TPI_I2S_FIFO_ENABLE			(1 << 7)
> +
> +#define SII902X_TPI_I2S_INPUT_CONFIG_REG	0x20
> +#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES		(0 << 0)
> +#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_NO		(1 << 0)
> +#define SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST		(0 << 1)
> +#define SII902X_TPI_I2S_SD_DIRECTION_LSB_FIRST		(1 << 1)
> +#define SII902X_TPI_I2S_SD_JUSTIFY_LEFT			(0 << 2)
> +#define SII902X_TPI_I2S_SD_JUSTIFY_RIGHT		(1 << 2)
> +#define SII902X_TPI_I2S_WS_POLARITY_LOW			(0 << 3)
> +#define SII902X_TPI_I2S_WS_POLARITY_HIGH		(1 << 3)
> +#define SII902X_TPI_I2S_MCLK_MULTIPLIER_128		(0 << 4)
> +#define SII902X_TPI_I2S_MCLK_MULTIPLIER_256		(1 << 4)
> +#define SII902X_TPI_I2S_MCLK_MULTIPLIER_384		(2 << 4)
> +#define SII902X_TPI_I2S_MCLK_MULTIPLIER_512		(3 << 4)
> +#define SII902X_TPI_I2S_MCLK_MULTIPLIER_768		(4 << 4)
> +#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1024		(5 << 4)
> +#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1152		(6 << 4)
> +#define SII902X_TPI_I2S_MCLK_MULTIPLIER_192		(7 << 4)
> +#define SII902X_TPI_I2S_SCK_EDGE_FALLING		(0 << 7)
> +#define SII902X_TPI_I2S_SCK_EDGE_RISING			(1 << 7)
> +
> +#define SII902X_TPI_I2S_STRM_HDR_BASE	0x21
> +#define SII902X_TPI_I2S_STRM_HDR_SIZE	5
> +
> +#define SII902X_TPI_AUDIO_CONFIG_BYTE2_REG	0x26
> +#define SII902X_TPI_AUDIO_CODING_STREAM_HEADER		(0 << 0)
> +#define SII902X_TPI_AUDIO_CODING_PCM			(1 << 0)
> +#define SII902X_TPI_AUDIO_CODING_AC3			(2 << 0)
> +#define SII902X_TPI_AUDIO_CODING_MPEG1			(3 << 0)
> +#define SII902X_TPI_AUDIO_CODING_MP3			(4 << 0)
> +#define SII902X_TPI_AUDIO_CODING_MPEG2			(5 << 0)
> +#define SII902X_TPI_AUDIO_CODING_AAC			(6 << 0)
> +#define SII902X_TPI_AUDIO_CODING_DTS			(7 << 0)
> +#define SII902X_TPI_AUDIO_CODING_ATRAC			(8 << 0)
> +#define SII902X_TPI_AUDIO_MUTE_DISABLE			(0 << 4)
> +#define SII902X_TPI_AUDIO_MUTE_ENABLE			(1 << 4)
> +#define SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS		(0 << 5)
> +#define SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS		(1 << 5)
> +#define SII902X_TPI_AUDIO_INTERFACE_DISABLE		(0 << 6)
> +#define SII902X_TPI_AUDIO_INTERFACE_SPDIF		(1 << 6)
> +#define SII902X_TPI_AUDIO_INTERFACE_I2S			(2 << 6)
> +
> +#define SII902X_TPI_AUDIO_CONFIG_BYTE3_REG	0x27
> +#define SII902X_TPI_AUDIO_FREQ_STREAM			(0 << 3)
> +#define SII902X_TPI_AUDIO_FREQ_32KHZ			(1 << 3)
> +#define SII902X_TPI_AUDIO_FREQ_44KHZ			(2 << 3)
> +#define SII902X_TPI_AUDIO_FREQ_48KHZ			(3 << 3)
> +#define SII902X_TPI_AUDIO_FREQ_88KHZ			(4 << 3)
> +#define SII902X_TPI_AUDIO_FREQ_96KHZ			(5 << 3)
> +#define SII902X_TPI_AUDIO_FREQ_176KHZ			(6 << 3)
> +#define SII902X_TPI_AUDIO_FREQ_192KHZ			(7 << 3)
> +#define SII902X_TPI_AUDIO_SAMPLE_SIZE_STREAM		(0 << 6)
> +#define SII902X_TPI_AUDIO_SAMPLE_SIZE_16		(1 << 6)
> +#define SII902X_TPI_AUDIO_SAMPLE_SIZE_20		(2 << 6)
> +#define SII902X_TPI_AUDIO_SAMPLE_SIZE_24		(3 << 6)
> +
> +#define SII902X_TPI_AUDIO_CONFIG_BYTE4_REG	0x28
> +
>  #define SII902X_INT_ENABLE			0x3c
>  #define SII902X_INT_STATUS			0x3d
>  #define SII902X_HOTPLUG_EVENT			BIT(0)
> @@ -81,6 +156,16 @@
>  
>  #define SII902X_REG_TPI_RQB			0xc7
>  
> +/* Indirect internal register access */
> +#define SII902X_IND_SET_PAGE			0xbc
> +#define SII902X_IND_OFFSET			0xbd
> +#define SII902X_IND_VALUE			0xbe
> +
> +#define SII902X_TPI_MISC_INFOFRAME_BASE		0xbf
> +#define SII902X_TPI_MISC_INFOFRAME_END		0xde
> +#define SII902X_TPI_MISC_INFOFRAME_SIZE	\
> +	(SII902X_TPI_MISC_INFOFRAME_END - SII902X_TPI_MISC_INFOFRAME_BASE)
> +
>  #define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS	500
>  
>  struct sii902x {
> @@ -90,6 +175,16 @@ struct sii902x {
>  	struct drm_connector connector;
>  	struct gpio_desc *reset_gpio;
>  	struct i2c_mux_core *i2cmux;
> +	/*
> +	 * Mutex protects audio and video functions from interfering
> +	 * each other, by keeping their i2c command sequences atomic.
> +	 */
> +	struct mutex mutex;
> +	struct sii902x_audio {
> +		struct platform_device *pdev;
> +		struct clk *mclk;
> +		u32 i2s_fifo_routing[4];
> +	} audio;
>  };
>  
>  static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val)
> @@ -161,8 +256,12 @@ sii902x_connector_detect(struct drm_connector *connector, bool force)
>  	struct sii902x *sii902x = connector_to_sii902x(connector);
>  	unsigned int status;
>  
> +	mutex_lock(&sii902x->mutex);
> +
>  	regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
>  
> +	mutex_unlock(&sii902x->mutex);
> +
>  	return (status & SII902X_PLUGGED_STATUS) ?
>  	       connector_status_connected : connector_status_disconnected;
>  }
> @@ -184,6 +283,8 @@ static int sii902x_get_modes(struct drm_connector *connector)
>  	u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI;
>  	int num = 0, ret;
>  
> +	mutex_lock(&sii902x->mutex);
> +
>  	edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
>  	drm_connector_update_edid_property(connector, edid);
>  	if (edid) {
> @@ -197,14 +298,19 @@ static int sii902x_get_modes(struct drm_connector *connector)
>  	ret = drm_display_info_set_bus_formats(&connector->display_info,
>  					       &bus_format, 1);
>  	if (ret)
> -		return ret;
> +		goto error_out;
>  
>  	ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
>  				 SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
>  	if (ret)
> -		return ret;
> +		goto error_out;
> +
> +	ret = num;
> +
> +error_out:
> +	mutex_unlock(&sii902x->mutex);
>  
> -	return num;
> +	return ret;
>  }
>  
>  static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector,
> @@ -224,20 +330,28 @@ static void sii902x_bridge_disable(struct drm_bridge *bridge)
>  {
>  	struct sii902x *sii902x = bridge_to_sii902x(bridge);
>  
> +	mutex_lock(&sii902x->mutex);
> +
>  	regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
>  			   SII902X_SYS_CTRL_PWR_DWN,
>  			   SII902X_SYS_CTRL_PWR_DWN);
> +
> +	mutex_unlock(&sii902x->mutex);
>  }
>  
>  static void sii902x_bridge_enable(struct drm_bridge *bridge)
>  {
>  	struct sii902x *sii902x = bridge_to_sii902x(bridge);
>  
> +	mutex_lock(&sii902x->mutex);
> +
>  	regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL,
>  			   SII902X_AVI_POWER_STATE_MSK,
>  			   SII902X_AVI_POWER_STATE_D(0));
>  	regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
>  			   SII902X_SYS_CTRL_PWR_DWN, 0);
> +
> +	mutex_unlock(&sii902x->mutex);
>  }
>  
>  static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
> @@ -264,26 +378,31 @@ static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
>  	buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO |
>  		 SII902X_TPI_AVI_INPUT_COLORSPACE_RGB;
>  
> +	mutex_lock(&sii902x->mutex);
> +
>  	ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10);
>  	if (ret)
> -		return;
> +		goto out;
>  
>  	ret = drm_hdmi_avi_infoframe_from_display_mode(&frame, adj, false);
>  	if (ret < 0) {
>  		DRM_ERROR("couldn't fill AVI infoframe\n");
> -		return;
> +		goto out;
>  	}
>  
>  	ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
>  	if (ret < 0) {
>  		DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
> -		return;
> +		goto out;
>  	}
>  
>  	/* Do not send the infoframe header, but keep the CRC field. */
>  	regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME,
>  			  buf + HDMI_INFOFRAME_HEADER_SIZE - 1,
>  			  HDMI_AVI_INFOFRAME_SIZE + 1);
> +
> +out:
> +	mutex_unlock(&sii902x->mutex);
>  }
>  
>  static int sii902x_bridge_attach(struct drm_bridge *bridge)
> @@ -324,6 +443,323 @@ static const struct drm_bridge_funcs sii902x_bridge_funcs = {
>  	.enable = sii902x_bridge_enable,
>  };
>  
> +static int sii902x_mute(struct sii902x *sii902x, bool mute)
> +{
> +	struct device *dev = &sii902x->i2c->dev;
> +	unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE :
> +		SII902X_TPI_AUDIO_MUTE_DISABLE;
> +
> +	dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted");
> +
> +	return regmap_update_bits(sii902x->regmap,
> +				  SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
> +				  SII902X_TPI_AUDIO_MUTE_ENABLE, val);
> +}
> +
> +static const unsigned int sii902x_mclk_div_table[] = {
> +	128, 256, 384, 512, 768, 1024, 1152, 192 };
> +
> +static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate,
> +				   unsigned int mclk)
> +{
> +	unsigned int div = mclk / rate;
> +	int distance = 100000;
> +	u8 i, nearest = 0;
> +
> +	for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) {
> +		unsigned int d = abs(div - sii902x_mclk_div_table[i]);
> +
> +		if (d >= distance)
> +			continue;
> +
> +		nearest = i;
> +		distance = d;
> +		if (d == 0)
> +			break;
> +	}
> +
> +	*i2s_config_reg |= nearest << 4;
> +
> +	if (distance != 0)
> +		return sii902x_mclk_div_table[nearest];
> +
> +	return 0;
> +}
> +
> +static const struct sii902x_sample_freq {
> +	u32 freq;
> +	u8 val;
> +} sii902x_sample_freq[] = {
> +	{ .freq = 32000,	.val = SII902X_TPI_AUDIO_FREQ_32KHZ },
> +	{ .freq = 44000,	.val = SII902X_TPI_AUDIO_FREQ_44KHZ },
> +	{ .freq = 48000,	.val = SII902X_TPI_AUDIO_FREQ_48KHZ },
> +	{ .freq = 88000,	.val = SII902X_TPI_AUDIO_FREQ_88KHZ },
> +	{ .freq = 96000,	.val = SII902X_TPI_AUDIO_FREQ_96KHZ },
> +	{ .freq = 176000,	.val = SII902X_TPI_AUDIO_FREQ_176KHZ },
> +	{ .freq = 192000,	.val = SII902X_TPI_AUDIO_FREQ_192KHZ },
> +};
> +
> +static int sii902x_audio_hw_params(struct device *dev, void *data,
> +				   struct hdmi_codec_daifmt *daifmt,
> +				   struct hdmi_codec_params *params)
> +{
> +	struct sii902x *sii902x = dev_get_drvdata(dev);
> +	u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST;
> +	u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S |
> +			       SII902X_TPI_AUDIO_MUTE_ENABLE |
> +			       SII902X_TPI_AUDIO_CODING_PCM);
> +	u8 config_byte3_reg = 0;
> +	u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)];
> +	unsigned long mclk_rate;
> +	int i, ret;
> +
> +	if (daifmt->bit_clk_master || daifmt->frame_clk_master) {
> +		dev_dbg(dev, "%s: I2S master mode not supported\n", __func__);
> +		return -EINVAL;
> +	}
> +
> +	switch (daifmt->fmt) {
> +	case HDMI_I2S:
> +		i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES |
> +			SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
> +		break;
> +	case HDMI_RIGHT_J:
> +		i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT;
> +		break;
> +	case HDMI_LEFT_J:
> +		i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
> +		break;
> +	default:
> +		dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__,
> +			daifmt->fmt);
> +		return -EINVAL;
> +	}
> +
> +	if (daifmt->bit_clk_inv)
> +		i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING;
> +	else
> +		i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING;
> +
> +	if (daifmt->frame_clk_inv)
> +		i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW;
> +	else
> +		i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH;
> +
> +	if (params->channels > 2)
> +		config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS;
> +	else
> +		config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS;
> +
> +	switch (params->sample_width) {
> +	case 16:
> +		config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16;
> +		break;
> +	case 20:
> +		config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20;
> +		break;
> +	case 24:
> +	case 32:
> +		config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24;
> +		break;
> +	default:
> +		dev_err(dev, "%s: Unsupported sample width %u\n", __func__,
> +			params->sample_width);
> +		return -EINVAL;
> +	}
> +
> +	for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) {
> +		if (params->sample_rate == sii902x_sample_freq[i].freq) {
> +			config_byte3_reg |= sii902x_sample_freq[i].val;
> +			break;
> +		}
> +	}
> +
> +	mclk_rate = clk_get_rate(sii902x->audio.mclk);
> +
> +	ret = sii902x_select_mclk_div(&i2s_config_reg, params->sample_rate,
> +				      mclk_rate);
> +	if (ret)
> +		dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n",
> +			mclk_rate, ret, params->sample_rate);
> +
> +	ret = clk_prepare_enable(sii902x->audio.mclk);
> +	if (ret) {
> +		dev_err(dev, "Enabling mclk failed: %d\n", ret);
> +		return ret;
> +	}
> +
> +	mutex_lock(&sii902x->mutex);
> +
> +	ret = regmap_write(sii902x->regmap,
> +			   SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
> +			   config_byte2_reg);
> +	if (ret < 0)
> +		goto out;
> +
> +	ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG,
> +			   i2s_config_reg);
> +	if (ret)
> +		goto out;
> +
> +	for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_routing); i++)
> +		regmap_write(sii902x->regmap,
> +			     SII902X_TPI_I2S_ENABLE_MAPPING_REG,
> +			     sii902x->audio.i2s_fifo_routing[i]);
> +
> +	ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG,
> +			   config_byte3_reg);
> +	if (ret)
> +		goto out;
> +
> +	ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE,
> +				params->iec.status,
> +				min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE,
> +				    sizeof(params->iec.status)));
> +	if (ret)
> +		goto out;
> +
> +	ret = hdmi_audio_infoframe_pack(&params->cea, infoframe_buf,
> +					sizeof(infoframe_buf));
> +	if (ret < 0) {
> +		dev_err(dev, "%s: Failed to pack audio infoframe: %d\n",
> +			__func__, ret);
> +		goto out;
> +	}
> +
> +	ret = regmap_bulk_write(sii902x->regmap,
> +				SII902X_TPI_MISC_INFOFRAME_BASE,
> +				infoframe_buf,
> +				min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE));
> +	if (ret)
> +		goto out;
> +
> +	/* Decode Level 0 Packets */
> +	ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02);
> +	if (ret)
> +		goto out;
> +
> +	ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24);
> +	if (ret)
> +		goto out;
> +
> +	ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02);
> +	if (ret)
> +		goto out;
> +
> +	dev_dbg(dev, "%s: hdmi audio enabled\n", __func__);
> +out:
> +	mutex_unlock(&sii902x->mutex);
> +
> +	if (ret) {
> +		clk_disable_unprepare(sii902x->audio.mclk);
> +		dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__,
> +			ret);
> +	}
> +
> +	return ret;
> +}
> +
> +static void sii902x_audio_shutdown(struct device *dev, void *data)
> +{
> +	struct sii902x *sii902x = dev_get_drvdata(dev);
> +
> +	mutex_lock(&sii902x->mutex);
> +
> +	regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
> +		     SII902X_TPI_AUDIO_INTERFACE_DISABLE);
> +
> +	mutex_unlock(&sii902x->mutex);
> +
> +	clk_disable_unprepare(sii902x->audio.mclk);
> +}
> +
> +int sii902x_audio_digital_mute(struct device *dev, void *data, bool enable)
> +{
> +	struct sii902x *sii902x = dev_get_drvdata(dev);
> +
> +	mutex_lock(&sii902x->mutex);
> +
> +	sii902x_mute(sii902x, enable);
> +
> +	mutex_unlock(&sii902x->mutex);
> +
> +	return 0;
> +}
> +
> +static int sii902x_audio_get_eld(struct device *dev, void *data,
> +				 uint8_t *buf, size_t len)
> +{
> +	struct sii902x *sii902x = dev_get_drvdata(dev);
> +
> +	mutex_lock(&sii902x->mutex);
> +
> +	memcpy(buf, sii902x->connector.eld,
> +	       min(sizeof(sii902x->connector.eld), len));
> +
> +	mutex_unlock(&sii902x->mutex);
> +
> +	return 0;
> +}
> +
> +static const struct hdmi_codec_ops sii902x_audio_codec_ops = {
> +	.hw_params = sii902x_audio_hw_params,
> +	.audio_shutdown = sii902x_audio_shutdown,
> +	.digital_mute = sii902x_audio_digital_mute,
> +	.get_eld = sii902x_audio_get_eld,
> +};
> +
> +static int sii902x_audio_codec_init(struct sii902x *sii902x,
> +				    struct device *dev)
> +{
> +	static const u8 i2s_fifo_defaults[] = {
> +		SII902X_TPI_I2S_CONFIG_FIFO0,
> +		SII902X_TPI_I2S_CONFIG_FIFO1,
> +		SII902X_TPI_I2S_CONFIG_FIFO2,
> +		SII902X_TPI_I2S_CONFIG_FIFO3,
> +	};
> +	struct hdmi_codec_pdata codec_data = {
> +		.ops = &sii902x_audio_codec_ops,
> +		.i2s = 1, /* Only i2s support for now. */
> +		.spdif = 0,
> +		.max_i2s_channels = 0,
> +	};
> +	int ret, i;
> +
> +	ret = of_property_read_u32_array(dev->of_node, "i2s-fifo-routing",
> +					 sii902x->audio.i2s_fifo_routing,
> +					 ARRAY_SIZE(sii902x->audio.i2s_fifo_routing));
> +
> +	if (ret != 0) {
> +		if (ret == -EINVAL)
> +			dev_dbg(dev, "%s: No \"i2s-fifo-routing\", no audio\n",
> +			__func__);
> +		else
> +			dev_err(dev,
> +				"%s: Error gettin \"i2s-fifo-routing\": %d\n",
> +				__func__, ret);
> +		return 0;
> +	}
> +
> +	sii902x->audio.mclk = devm_clk_get(dev, "mclk");
> +	if (IS_ERR(sii902x->audio.mclk)) {
> +		dev_err(dev, "%s: No clock (audio mclk) found: %ld\n",
> +			__func__, PTR_ERR(sii902x->audio.mclk));
> +		return 0;
> +	}
> +
> +	for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_routing); i++) {
> +		if (sii902x->audio.i2s_fifo_routing[i] & ENABLE_BIT)
> +			codec_data.max_i2s_channels += 2;
> +		sii902x->audio.i2s_fifo_routing[i] |= i2s_fifo_defaults[i];
> +	}
> +
> +	sii902x->audio.pdev = platform_device_register_data(
> +		dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
> +		&codec_data, sizeof(codec_data));
> +
> +	return PTR_ERR_OR_ZERO(sii902x->audio.pdev);
> +}
> +
>  static const struct regmap_range sii902x_volatile_ranges[] = {
>  	{ .range_min = 0, .range_max = 0xff },
>  };
> @@ -336,6 +772,7 @@ static const struct regmap_access_table sii902x_volatile_table = {
>  static const struct regmap_config sii902x_regmap_config = {
>  	.reg_bits = 8,
>  	.val_bits = 8,
> +	.max_register = SII902X_TPI_MISC_INFOFRAME_END,
>  	.volatile_table = &sii902x_volatile_table,
>  	.cache_type = REGCACHE_NONE,
>  };
> @@ -508,6 +945,8 @@ static int sii902x_probe(struct i2c_client *client,
>  		return PTR_ERR(sii902x->reset_gpio);
>  	}
>  
> +	mutex_init(&sii902x->mutex);
> +
>  	sii902x_reset(sii902x);
>  
>  	ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
> @@ -548,6 +987,8 @@ static int sii902x_probe(struct i2c_client *client,
>  	sii902x->bridge.timings = &default_sii902x_timings;
>  	drm_bridge_add(&sii902x->bridge);
>  
> +	sii902x_audio_codec_init(sii902x, dev);
> +
>  	i2c_set_clientdata(client, sii902x);
>  
>  	sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev,
> diff --git a/include/dt-bindings/sound/sii902x-audio.h b/include/dt-bindings/sound/sii902x-audio.h
> new file mode 100644
> index 000000000000..32e50a926b6f
> --- /dev/null
> +++ b/include/dt-bindings/sound/sii902x-audio.h
> @@ -0,0 +1,11 @@
> +#ifndef __DT_SII9022_AUDIO_H
> +#define __DT_SII9022_AUDIO_H
> +
> +#define ENABLE_BIT			0x80
> +#define CONNECT_SD0			0x00
> +#define CONNECT_SD1			0x10
> +#define CONNECT_SD2			0x20
> +#define CONNECT_SD3			0x30
> +#define LEFT_RIGHT_SWAP_BIT		0x04
> +
> +#endif /* __DT_SII9022_AUDIO_H */


_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v2 5/5] drm/bridge: sii902x: Implement HDMI audio support

[Rob Herring]

On Wed, Feb 27, 2019 at 11:54:23PM +0200, Jyri Sarha wrote:
> Implement HDMI audio support by using ASoC HDMI codec. The commit
> implements the necessary callbacks and configuration for the HDMI
> codec and registers a virtual platform device for the codec to attach.
> 
> Signed-off-by: Jyri Sarha <jsarha@ti.com>
> ---
>  .../bindings/display/bridge/sii902x.txt       |  36 +-
>  drivers/gpu/drm/bridge/sii902x.c              | 453 +++++++++++++++++-
>  include/dt-bindings/sound/sii902x-audio.h     |  11 +

Please split bindings (doc and header) to a separate patch.

>  3 files changed, 493 insertions(+), 7 deletions(-)
>  create mode 100644 include/dt-bindings/sound/sii902x-audio.h
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/sii902x.txt b/Documentation/devicetree/bindings/display/bridge/sii902x.txt
> index 72d2dc6c3e6b..647b2fd84db9 100644
> --- a/Documentation/devicetree/bindings/display/bridge/sii902x.txt
> +++ b/Documentation/devicetree/bindings/display/bridge/sii902x.txt
> @@ -5,9 +5,32 @@ Required properties:
>  	- reg: i2c address of the bridge
>  
>  Optional properties:
> -	- interrupts: describe the interrupt line used to inform the host 
> +	- interrupts: describe the interrupt line used to inform the host

Unrelated change.

>  	  about hotplug events.
>  	- reset-gpios: OF device-tree gpio specification for RST_N pin.
> +	- i2s-fifo-routing: Array of exactly 4 integers indicating i2s

Needs a vendor prefix.

> +	  pins for audio fifo routing. First integer defines routing to
> +	  fifo 0 and second to fifo 1, etc. Integers can be filled with
> +	  definitions from: include/dt-bindings/sound/sii902x-audio.h
> +	  The available definitions are:
> +	  - ENABLE_BIT:	enable this audio fifo
> +	  - CONNECT_SD#: route audio input from SD0, SD1, SD2, or SD3 i2s
> +			 data input pin
> +	  - LEFT_RIGHT_SWAP_BIT: swap i2s input channels for this fifo
> +	  I2S HDMI audio is configured only if this property is found.
> +	- clocks: phandle mclk
> +	- clock-names: "mclk"
> +	    Describes SII902x MCLK input. MCLK is used to produce
> +	    HDMI audio CTS values. This property is required if
> +	    "i2s-fifo-routing"-property is present. This property follows
> +	    Documentation/devicetree/bindings/clock/clock-bindings.txt
> +	    consumer binding.
> +	- #sound-dai-cells = <0>: ASoC codec dai available for simple-card
> +	    If audio properties are present sii902x provides an ASoC
> +	    codec component driver that can be used by other ASoC
> +	    components like simple-card. See binding document fo> +	    details:
> +	    Documentation/devicetree/bindings/sound/simple-card.txt
>  
>  Optional subnodes:
>  	- video input: this subnode can contain a video input port node
> @@ -21,6 +44,17 @@ Example:
>  		compatible = "sil,sii9022";
>  		reg = <0x39>;
>  		reset-gpios = <&pioA 1 0>;
> +
> +		#sound-dai-cells = <0>;
> +		i2s-fifo-routing = <
> +			(ENABLE_BIT|CONNECT_SD0)
> +			0
> +			0
> +			0
> +		>;
> +		clocks = <&mclk>;
> +		clock-names = "mclk";
> +
>  		ports {
>  			#address-cells = <1>;
>  			#size-cells = <0>;

[...]

> diff --git a/include/dt-bindings/sound/sii902x-audio.h b/include/dt-bindings/sound/sii902x-audio.h
> new file mode 100644
> index 000000000000..32e50a926b6f
> --- /dev/null
> +++ b/include/dt-bindings/sound/sii902x-audio.h
> @@ -0,0 +1,11 @@

License?

> +#ifndef __DT_SII9022_AUDIO_H
> +#define __DT_SII9022_AUDIO_H
> +
> +#define ENABLE_BIT			0x80
> +#define CONNECT_SD0			0x00
> +#define CONNECT_SD1			0x10
> +#define CONNECT_SD2			0x20
> +#define CONNECT_SD3			0x30
> +#define LEFT_RIGHT_SWAP_BIT		0x04
> +
> +#endif /* __DT_SII9022_AUDIO_H */
> -- 
> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
> 
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v2 0/5] drm/bridge: sii902x: HDMI-audio support and some fixes

[Laurent Pinchart]

Hi Jyri,

On Wed, Feb 27, 2019 at 11:54:18PM +0200, Jyri Sarha wrote:
> Changes since first version:
> - Moved reviewed patches to front:
>   - drm/bridge: sii902x: add input_bus_flags
>   - drm/bridge: sii902x: Set output mode to HDMI or DVI according to EDID
>   - drm/bridge: sii902x: pixel clock unit is 10kHz instead of 1kHz
> - Added a new fix:
>   - drm/bridge: sii902x: Select I2C_MUX
> - Applied some review suggestions to
>   - drm/bridge: sii902x: Implement HDMI audio support
>     - use clock-names property to name mclk
>     - move comment describing added mutex to struct sii902x and improve it
>     - cleanup sii902x_mute()
>     - cleanup sii902x_select_mclk_div()
>     - fix condition for checking ENABLE_BIT from i2s_fifo_routing in
>       sii902x_audio_codec_init()
> 
> Still to do
> 
> - Agree on i2s wires to HDMI audio fifo routing in dts. 
> 
>   The current scheme is quite straight forward, but there is maybe
>   there is even more straight forward solutions like:
> 
>   audio-fifo-enable = <1 1 1 1>;
>   audio-i2s-pin-to-fifo = <0 1 2 3>;
> 
>   Meaning that all fifos are enabled and SD0 is routed to fifo 0, SD1
>   to fifo 1, etc. I am not sure if the channel swap functionality
>   should show in dts binding.

Please forgive my lack of audio knowledge, but it this a system
description that should be encoded in DT, or a policy that should be
handled purely in software (either fully inside the kernel or with the
help of userspace) ?

> Jyri Sarha (4):
>   drm/bridge: sii902x: Set output mode to HDMI or DVI according to EDID
>   drm/bridge: sii902x: pixel clock unit is 10kHz instead of 1kHz
>   drm/bridge: sii902x: Select I2C_MUX
>   drm/bridge: sii902x: Implement HDMI audio support
> 
> Tomi Valkeinen (1):
>   drm/bridge: sii902x: add input_bus_flags
> 
>  .../bindings/display/bridge/sii902x.txt       |  36 +-
>  drivers/gpu/drm/bridge/Kconfig                |   1 +
>  drivers/gpu/drm/bridge/sii902x.c              | 472 +++++++++++++++++-
>  include/dt-bindings/sound/sii902x-audio.h     |  11 +
>  4 files changed, 512 insertions(+), 8 deletions(-)
>  create mode 100644 include/dt-bindings/sound/sii902x-audio.h

-- 
Regards,

Laurent Pinchart
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v2 0/5] drm/bridge: sii902x: HDMI-audio support and some fixes

[Jyri Sarha]

On 04/03/2019 14:42, Laurent Pinchart wrote:
> Hi Jyri,
> 
> On Wed, Feb 27, 2019 at 11:54:18PM +0200, Jyri Sarha wrote:
>> Changes since first version:
>> - Moved reviewed patches to front:
>>   - drm/bridge: sii902x: add input_bus_flags
>>   - drm/bridge: sii902x: Set output mode to HDMI or DVI according to EDID
>>   - drm/bridge: sii902x: pixel clock unit is 10kHz instead of 1kHz
>> - Added a new fix:
>>   - drm/bridge: sii902x: Select I2C_MUX
>> - Applied some review suggestions to
>>   - drm/bridge: sii902x: Implement HDMI audio support
>>     - use clock-names property to name mclk
>>     - move comment describing added mutex to struct sii902x and improve it
>>     - cleanup sii902x_mute()
>>     - cleanup sii902x_select_mclk_div()
>>     - fix condition for checking ENABLE_BIT from i2s_fifo_routing in
>>       sii902x_audio_codec_init()
>>
>> Still to do
>>
>> - Agree on i2s wires to HDMI audio fifo routing in dts. 
>>
>>   The current scheme is quite straight forward, but there is maybe
>>   there is even more straight forward solutions like:
>>
>>   audio-fifo-enable = <1 1 1 1>;
>>   audio-i2s-pin-to-fifo = <0 1 2 3>;
>>
>>   Meaning that all fifos are enabled and SD0 is routed to fifo 0, SD1
>>   to fifo 1, etc. I am not sure if the channel swap functionality
>>   should show in dts binding.
> Please forgive my lack of audio knowledge, but it this a system
> description that should be encoded in DT, or a policy that should be
> handled purely in software (either fully inside the kernel or with the
> help of userspace) ?
> 

This property describes how many i2s wires are connected to sii902x and
in what order, so I think it belongs to DTS.

One might of course wonder why anybody would put the i2s wires to any
other order than 0 <-> 0, 1 <-> 1, 2 <-> 2, and 3 <-> 3, but then a
again I've seen weirder board designs.

Best regards,
Jyri


-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v2 0/5] drm/bridge: sii902x: HDMI-audio support and some fixes

[Laurent Pinchart]

Hi Jyri,

On Mon, Mar 04, 2019 at 04:29:17PM +0200, Jyri Sarha wrote:
> On 04/03/2019 14:42, Laurent Pinchart wrote:
> > On Wed, Feb 27, 2019 at 11:54:18PM +0200, Jyri Sarha wrote:
> >> Changes since first version:
> >> - Moved reviewed patches to front:
> >>   - drm/bridge: sii902x: add input_bus_flags
> >>   - drm/bridge: sii902x: Set output mode to HDMI or DVI according to EDID
> >>   - drm/bridge: sii902x: pixel clock unit is 10kHz instead of 1kHz
> >> - Added a new fix:
> >>   - drm/bridge: sii902x: Select I2C_MUX
> >> - Applied some review suggestions to
> >>   - drm/bridge: sii902x: Implement HDMI audio support
> >>     - use clock-names property to name mclk
> >>     - move comment describing added mutex to struct sii902x and improve it
> >>     - cleanup sii902x_mute()
> >>     - cleanup sii902x_select_mclk_div()
> >>     - fix condition for checking ENABLE_BIT from i2s_fifo_routing in
> >>       sii902x_audio_codec_init()
> >>
> >> Still to do
> >>
> >> - Agree on i2s wires to HDMI audio fifo routing in dts. 
> >>
> >>   The current scheme is quite straight forward, but there is maybe
> >>   there is even more straight forward solutions like:
> >>
> >>   audio-fifo-enable = <1 1 1 1>;
> >>   audio-i2s-pin-to-fifo = <0 1 2 3>;
> >>
> >>   Meaning that all fifos are enabled and SD0 is routed to fifo 0, SD1
> >>   to fifo 1, etc. I am not sure if the channel swap functionality
> >>   should show in dts binding.
> > 
> > Please forgive my lack of audio knowledge, but it this a system
> > description that should be encoded in DT, or a policy that should be
> > handled purely in software (either fully inside the kernel or with the
> > help of userspace) ?
> 
> This property describes how many i2s wires are connected to sii902x and
> in what order, so I think it belongs to DTS.

That would belong to DT, yes. We have solved a similar problem with
CSI-2 receivers, where the number of data lanes and their mapping can
often be configured. See the definition of the data-lanes property in
Documentation/devicetree/bindings/media/video-interfaces.txt for more
information. How about using similar bindings ? It would also solve
Andrzej's concerns that you don't describe the audio connection in DT.

> One might of course wonder why anybody would put the i2s wires to any
> other order than 0 <-> 0, 1 <-> 1, 2 <-> 2, and 3 <-> 3, but then a
> again I've seen weirder board designs.

It can be useful to simplify signal routing on the board.

-- 
Regards,

Laurent Pinchart
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel