Hi Niklas,
On Fri, Mar 9, 2018 at 10:58 PM, Niklas Söderlund
<niklas.soderl...@ragnatech.se> wrote:
> On 2018-03-09 13:33:03 +0100, Geert Uytterhoeven wrote:
>> P.S. Apparently R-Car Gen2 and Gen3 also support 8-bit YCbCr input data
>> on the DATA8-15 pins, for which we don't have pin groups yet.
>> Niklas: is this mode supported by the VIN driver?
>
> * Gen2
> I can't find DATA12-15 in the datasheet I have, where did you find them?
> I'm looking at Tables 26.3, 26.4 and 26.5 on v1.0 of the Gen2 datasheet.
> But yes on Gen2 the VIN driver supports capturing from these data pins.
Sorry, on Gen2 (all but V2H, to make matters more complicated), the DATA pins
are not numbered from 0 to 23, but split in 3 blocks of 8 pins, matching R, G,
and B blocks. But apart from the numbering, the formats are mostly the same (4
bit width is the exception, and supported on Gen2 only).
What I meant is the third mode in e.g. Table 26.5, "ITU-R BT.601/BT.709/BT.656
8-bit YCbCr-422 (VnDMR2/YDS = 1)", which uses VI0_G[7:0] instead of VIO_B[7:0]
for transfering 8-bit YCbCr data. Apparently the PFC driver doesn't have a pin
group for that combo.
(I have v2.00 of the datasheet, but the table looks identical in v1.0).
> * Gen3
> Currently CSI-2 are the only supported input method for the Gen3
> patches. It would be possible with a small hack to run the Gen2 driver
> on Gen3 and have it try and use the DATA pins, but this is not tested as
> prior to V3M we had no device to test this on as the DATA pins where all
> routed to EXIO connectors.
>
> There have been some talks about adding support for this to the driver,
> I know Jacopo posted a patch-set a while ago for this but I have not
> tested it. Looking at the Gen3 Table 26.8.1 it sure looks like all
> DATA lines DATA0-23 could be used on some SoCs to capture 24 bit RGB and
> YCbCr.
My question was about the second mode in the table, which is the same one
as the third mode on Gen2.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
