[RFC][PATCH] drm/bridge: lvds-codec: Add support for pixel data sampling edge select

[Marek Vasut]

On 10/16/20 6:25 PM, Sam Ravnborg wrote:
> Hi Marek.

Hello Sam,

> On Sat, Oct 03, 2020 at 01:08:23AM +0200, Marek Vasut wrote:
>> The OnSemi FIN3385 Parallel-to-LVDS encoder has a dedicated input line to
>> select input pixel data sampling edge. Add DT property "pixelclk-active",
>> same as the one used by display timings, and configure bus flags based on
>> this DT property.
> 
> Why is it that this information cannot come from the panel driver?

Because the sampling edge of the panel can be different (is there even
such an edge for LVDS panel?). What we care about specifying here is the
edge on which the FIN3385 samples the data on the Parallel bus, and that
is a property of the FIN3385, because that is configured via a dedicated
pin on the FIN3385.

> The property tell when data are sampled and the FIN3385 Parallel-to-LVDS
> is the one that transmit the data - not then one that samples the data.
> Correct?

Not correct I'm afraid, see above.