RE: [RFC 20/28] media: vsp1: Add support for the RZ/G2L VSPD

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Hi Geert,

Thanks for the feedback.

> Subject: Re: [RFC 20/28] media: vsp1: Add support for the RZ/G2L VSPD
> 
> Hi Biju,
> 
> On Sun, Jan 23, 2022 at 4:20 PM Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> wrote:
> > > On Wed, Jan 12, 2022 at 05:46:04PM +0000, Biju Das wrote:
> > > > The RZ/G2L VSPD provides a single VSPD instance. it has the
> > > > following sub modules MAU, CTU, RPF, DPR, LUT, BRS, WPF and LIF.
> > > >
> > > > It does not have version register, so added a new compatible
> > > > string to match to get the version value. Also the reset is shared
> > > > with DU module.
> > >
> > > Does it really lack the version register, or is it just not documented
> ?
> > > It hasn't been documented on all R-Car variants, but has
> > > consistently been present.
> >
> > No, it is not present on RZ/G2L. the read value of this register is 0x0.
> 
> Just to be sure: you did check that while the module clock is enabled and
> the module reset is deasserted?

Yes, while display is active, please find the devmem value for version register.

root@smarc-rzg2l:~# devmem2 0x10873f00
/dev/mem opened.
Memory mapped at address 0xffffa43be000.
Read at address  0x10873F00 (0xffffa43bef00): 0x00000000

But it has version register for FCPVD, value is 0x109.

root@smarc-rzg2l:~# devmem2 0x10880000
/dev/mem opened.
Memory mapped at address 0xffff99899000.
Read at address  0x10880000 (0xffff99899000): 0x00000109
root@smarc-rzg2l:~#

Regards,
Biju




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