[PATCH V7 11/12] Documentation: bridge: Add documentation for ps8622 DT properties

[Ajay kumar]

Hi Tomi,

Thanks for your comments.

On Wed, Sep 17, 2014 at 5:22 PM, Tomi Valkeinen <tomi.valkeinen at ti.com> wrote:
> On 27/08/14 17:39, Ajay Kumar wrote:
>> Add documentation for DT properties supported by ps8622/ps8625
>> eDP-LVDS converter.
>>
>> Signed-off-by: Ajay Kumar <ajaykumar.rs at samsung.com>
>> ---
>>  .../devicetree/bindings/video/bridge/ps8622.txt    |   20 ++++++++++++++++++++
>>  1 file changed, 20 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/video/bridge/ps8622.txt
>>
>> diff --git a/Documentation/devicetree/bindings/video/bridge/ps8622.txt b/Documentation/devicetree/bindings/video/bridge/ps8622.txt
>> new file mode 100644
>> index 0000000..0ec8172
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/video/bridge/ps8622.txt
>> @@ -0,0 +1,20 @@
>> +ps8622-bridge bindings
>> +
>> +Required properties:
>> +     - compatible: "parade,ps8622" or "parade,ps8625"
>> +     - reg: first i2c address of the bridge
>> +     - sleep-gpios: OF device-tree gpio specification for PD_ pin.
>> +     - reset-gpios: OF device-tree gpio specification for RST_ pin.
>> +
>> +Optional properties:
>> +     - lane-count: number of DP lanes to use
>> +     - use-external-pwm: backlight will be controlled by an external PWM
>
> What does this mean? That the backlight support from ps8625 is not used?
> If so, maybe "disable-pwm" or something?
"use-external-pwm" or "disable-bridge-pwm" would be better.

>> +
>> +Example:
>> +     lvds-bridge at 48 {
>> +             compatible = "parade,ps8622";
>> +             reg = <0x48>;
>> +             sleep-gpios = <&gpc3 6 1 0 0>;
>> +             reset-gpios = <&gpc3 1 1 0 0>;
>> +             lane-count = <1>;
>> +     };
>>
>
> I wish all new display component bindings would use the video
> ports/endpoints to describe the connections. It will be very difficult
> to improve the display driver model later if we're missing such critical
> pieces from the DT bindings.
Why do we need a complex graph when it can be handled using a simple phandle?

Ajay