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
