Re: [PATCH 2/2] drm/panel: simple: Add timings for Raspberry Pi 7" panel

Tomi Valkeinen
2026-04-23T14:05:41Z

Hi,

On 23/04/2026 16:54, Marek Vasut wrote:
> On 4/23/26 3:16 PM, Tomi Valkeinen wrote:
>
> Hello Tomi,
>
>>>> In the past I used this panel compat instead of the
>>>> panel-raspberrypi-touchscreen.c and it worked.
>>>> IIRC Marek splitted the multi-function module into a regulator and the
>>>> panel description.
>>> Ok... Indeed https://pip.raspberrypi.com/categories/651-pcn lists
>>> PH800480T013 as one of the panels used. Although two variants are
>>> listed, and also a third panel model, possibly from another vendor.
>>>
>>> My module is v1.1, and I think it has the PH800480T013-IAC21 D/5624/
>>> KIT- LC variant.
>> A question to Marek: Where did you get the timings for PH800480T013?
>> Did you find a datasheet?
> Search engine first link:
>
> https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/5337/
> PH800480T013-IHC09.pdf

Thanks. That's not exactly the same variant, though (IHC09 vs IAC21).
Even so, that datasheet also lists the backporches as 46 and 23, which
are not the same as in d69de69f2be105b2474c05a5ca4827aac3e80ad3.

But oddly the datasheet pic shows that the backporch times would include
the sync time. Taken that way, the commit's hsw=2 and hbp=44 would
match, but the vsw=2 and vbp=22 still wouldn't.

I'll test my HW with the PH800480T013 compatible at some point and see
how it behaves.

Tomi