Re: [PATCH v5 0/5] Add OV5640 parallel interface and RGB565/YUYV support

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Hi Sakari,

On 01/10/2018 11:25 PM, Sakari Ailus wrote:
> Hi Hugues,
> 
> On Wed, Jan 10, 2018 at 03:51:07PM +0000, Hugues FRUCHET wrote:
>> Good news Maxime !
>>
>> Have you seen that you can adapt the polarities through devicetree ?
>>
>> +                       /* Parallel bus endpoint */
>> +                       ov5640_to_parallel: endpoint {
>> [...]
>> +                               hsync-active = <0>;
>> +                               vsync-active = <0>;
>> +                               pclk-sample = <1>;
>> +                       };
>>
>> Doing so you can adapt to your SoC/board setup easily.
>>
>> If you don't put those lines in devicetree, the ov5640 default init
>> sequence is used which set the polarity as defined in below comment:
>> ov5640_set_stream_dvp()
>> [...]
>> +        * Control lines polarity can be configured through
>> +        * devicetree endpoint control lines properties.
>> +        * If no endpoint control lines properties are set,
>> +        * polarity will be as below:
>> +        * - VSYNC:     active high
>> +        * - HREF:      active low
>> +        * - PCLK:      active low
>> +        */
>> [...]
> 
> The properties are at the moment documented as mandatory in DT binding
> documentation.
> 
of course, it was just to ask Maxime to check the devicetree on its 
side, the symptom observed by Maxime with hsync/vsync inversed is the 
same than the one observed if we stick to just default init sequence.

BR,
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