[1/2] media: adv7604: Add support for ADV7612 dual HDMI input decoder.

This patch adds necessary support for the ADV7612 dual HDMI decoder / repeater
chip.

This was tested using a heavily modified rcar_vin/soc_camera capture driver.

Tested-by: William Towle <william.towle@codethink.co.uk>
Signed-off-by: Ian Molton <ian.molton@codethink.co.uk>
---
 .../devicetree/bindings/media/i2c/adv7604.txt      | 17 +++----
 drivers/media/i2c/adv7604.c                        | 54 +++++++++++++++++++++-
 2 files changed, 61 insertions(+), 10 deletions(-)

Hi Ian,

Thank you for the patch.

On Monday 11 August 2014 13:05:18 Ian Molton wrote:
> This patch adds necessary support for the ADV7612 dual HDMI decoder /
> repeater chip.
> 
> This was tested using a heavily modified rcar_vin/soc_camera capture driver.
> 
> Tested-by: William Towle <william.towle@codethink.co.uk>
> Signed-off-by: Ian Molton <ian.molton@codethink.co.uk>
> ---
>  .../devicetree/bindings/media/i2c/adv7604.txt      | 17 +++----
>  drivers/media/i2c/adv7604.c                        | 54 ++++++++++++++++++-
>  2 files changed, 61 insertions(+), 10 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> b/Documentation/devicetree/bindings/media/i2c/adv7604.txt index
> c27cede..cc0708c 100644
> --- a/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> +++ b/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> @@ -1,15 +1,16 @@
> -* Analog Devices ADV7604/11 video decoder with HDMI receiver
> +* Analog Devices ADV7604/11/12 video decoder with HDMI receiver
> 
> -The ADV7604 and ADV7611 are multiformat video decoders with an integrated
> HDMI
> -receiver. The ADV7604 has four multiplexed HDMI inputs and one analog
> input,
> -and the ADV7611 has one HDMI input and no analog input.
> +The ADV7604 and ADV7611/12 are multiformat video decoders with an
> integrated
> +HDMI receiver. The ADV7604 has four multiplexed HDMI inputs and one analog
> +input, and the ADV7611 has one HDMI input and no analog input. The 7612 is
> similar to the 7611 but has 2 HDMI inputs.

Any reason to make the last line stand out instead of wrapping it at 80 
characters ?

> -These device tree bindings support the ADV7611 only at the moment.
> +These device tree bindings support the ADV7611/12 only at the moment.
> 
>  Required Properties:
> 
>    - compatible: Must contain one of the following
>      - "adi,adv7611" for the ADV7611
> +    - "adi,adv7612" for the ADV7612
> 
>    - reg: I2C slave address
> 
> @@ -22,10 +23,10 @@ port, in accordance with the video interface bindings
> defined in Documentation/devicetree/bindings/media/video-interfaces.txt.
> The port nodes are numbered as follows.
> 
> -  Port			ADV7611
> +  Port			ADV7611    ADV7612
>  ------------------------------------------------------------
> -  HDMI			0
> -  Digital output	1
> +  HDMI			0             0, 1
> +  Digital output	1                2
> 
>  The digital output port node must contain at least one endpoint.
> 
> diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
> index 1778d32..9f73a7f 100644
> --- a/drivers/media/i2c/adv7604.c
> +++ b/drivers/media/i2c/adv7604.c
> @@ -80,6 +80,7 @@ MODULE_LICENSE("GPL");
>  enum adv7604_type {
>  	ADV7604,
>  	ADV7611,
> +	ADV7612,
>  };
> 
>  struct adv7604_reg_seq {
> @@ -2517,6 +2518,11 @@ static void adv7611_setup_irqs(struct v4l2_subdev
> *sd) io_write(sd, 0x41, 0xd0); /* STDI irq for any change, disable INT2 */
> }
> 
> +static void adv7612_setup_irqs(struct v4l2_subdev *sd)
> +{
> +	io_write(sd, 0x41, 0xd0); /* disable INT2 */
> +}
> +
>  static void adv7604_unregister_clients(struct adv7604_state *state)
>  {
>  	unsigned int i;
> @@ -2601,6 +2607,19 @@ static const struct adv7604_reg_seq
> adv7611_recommended_settings_hdmi[] = { { ADV7604_REG_SEQ_TERM, 0 },
>  };
> 
> +static const struct adv7604_reg_seq adv7612_recommended_settings_hdmi[] = {

Could you please add a comment here with a reference to the documentation, 
like done for ADV7604 and ADV7611 ?

> +	{ ADV7604_REG(ADV7604_PAGE_CP, 0x6c), 0x00 },
> +	{ ADV7604_REG(ADV7604_PAGE_HDMI, 0x9b), 0x03 },
> +	{ ADV7604_REG(ADV7604_PAGE_HDMI, 0x6f), 0x08 },
> +	{ ADV7604_REG(ADV7604_PAGE_HDMI, 0x85), 0x1f },
> +	{ ADV7604_REG(ADV7604_PAGE_HDMI, 0x87), 0x70 },
> +	{ ADV7604_REG(ADV7604_PAGE_HDMI, 0x57), 0xda },
> +	{ ADV7604_REG(ADV7604_PAGE_HDMI, 0x58), 0x01 },
> +	{ ADV7604_REG(ADV7604_PAGE_HDMI, 0x03), 0x98 },
> +	{ ADV7604_REG(ADV7604_PAGE_HDMI, 0x4c), 0x44 },

Aren't you missing the equalizer settings ?

> +	{ ADV7604_REG_SEQ_TERM, 0 },
> +};
> +
>  static const struct adv7604_chip_info adv7604_chip_info[] = {
>  	[ADV7604] = {
>  		.type = ADV7604,
> @@ -2663,17 +2682,47 @@ static const struct adv7604_chip_info
> adv7604_chip_info[] = { BIT(ADV7604_PAGE_REP) |  BIT(ADV7604_PAGE_EDID) |
>  			BIT(ADV7604_PAGE_HDMI) | BIT(ADV7604_PAGE_CP),
>  	},
> +	[ADV7612] = {
> +		.type = ADV7612,
> +		.has_afe = false,
> +		.max_port = ADV7604_PAD_HDMI_PORT_B,
> +		.num_dv_ports = 2,
> +		.edid_enable_reg = 0x74,
> +		.edid_status_reg = 0x76,
> +		.lcf_reg = 0xa3,
> +		.tdms_lock_mask = 0x43,
> +		.cable_det_mask = 0x01,
> +		.fmt_change_digital_mask = 0x03,
> +		.formats = adv7604_formats,
> +		.nformats = ARRAY_SIZE(adv7604_formats),
> +		.set_termination = adv7611_set_termination,
> +		.setup_irqs = adv7612_setup_irqs,
> +		.read_hdmi_pixelclock = adv7611_read_hdmi_pixelclock,
> +		.read_cable_det = adv7611_read_cable_det,
> +		.recommended_settings = {
> +		    [1] = adv7612_recommended_settings_hdmi,
> +		},
> +		.num_recommended_settings = {
> +		    [1] = ARRAY_SIZE(adv7612_recommended_settings_hdmi),
> +		},
> +		.page_mask = BIT(ADV7604_PAGE_IO) | BIT(ADV7604_PAGE_CEC) |
> +			BIT(ADV7604_PAGE_INFOFRAME) | BIT(ADV7604_PAGE_AFE) |
> +			BIT(ADV7604_PAGE_REP) |  BIT(ADV7604_PAGE_EDID) |
> +			BIT(ADV7604_PAGE_HDMI) | BIT(ADV7604_PAGE_CP),
> +	},
>  };
> 
>  static struct i2c_device_id adv7604_i2c_id[] = {
>  	{ "adv7604", (kernel_ulong_t)&adv7604_chip_info[ADV7604] },
>  	{ "adv7611", (kernel_ulong_t)&adv7604_chip_info[ADV7611] },
> +	{ "adv7612", (kernel_ulong_t)&adv7604_chip_info[ADV7612] },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(i2c, adv7604_i2c_id);
> 
>  static struct of_device_id adv7604_of_id[] __maybe_unused = {
>  	{ .compatible = "adi,adv7611", .data = &adv7604_chip_info[ADV7611] },
> +	{ .compatible = "adi,adv7612", .data = &adv7604_chip_info[ADV7612] },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, adv7604_of_id);
> @@ -2828,8 +2877,9 @@ static int adv7604_probe(struct i2c_client *client,
>  	} else {
>  		val = (adv_smbus_read_byte_data_check(client, 0xea, false) << 8)
>  		    | (adv_smbus_read_byte_data_check(client, 0xeb, false) << 0);
> 
> -		if (val != 0x2051) {
> -			v4l2_info(sd, "not an adv7611 on address 0x%x\n",
> +		if ((state->info->type == ADV7611 && val != 0x2051) ||
> +		    (state->info->type == ADV7612 && val != 0x2041)) {
> +			v4l2_info(sd, "not an adv761x on address 0x%x\n",

Not a major issue, but that message could be misleading, as it could get 
printed when an ADV7611/12 is detected when an ADV7612/11 was expected.

>  					client->addr << 1);
>  			return -ENODEV;
>  		}