Hi Geert,
On Monday 15 February 2016 10:58:36 Geert Uytterhoeven wrote:
> On Fri, Feb 12, 2016 at 3:00 AM, Laurent Pinchart wrote:
> > The r8a7795 has 9 VSP instances with various capabilities.
> >
> > Only the VSPD instances are currently enabled as the other 5 instances
> > cause the following crash when reading the version register.
> >
> > [ 5.284206] Bad mode in Error handler detected, code 0xbf000002 --
> > SError
>
> Power Area A3VP seems to be powered down when Linux is started?
That's probably the reason indeed.
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
> > ---
> >
> > arch/arm64/boot/dts/renesas/r8a7795.dtsi | 128 ++++++++++++++++++++++++++
> > 1 file changed, 128 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/renesas/r8a7795.dtsi
> > b/arch/arm64/boot/dts/renesas/r8a7795.dtsi index
> > f62d6fa28acc..3c49ba5ecfbb 100644
> > --- a/arch/arm64/boot/dts/renesas/r8a7795.dtsi
> > +++ b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
> > @@ -961,6 +961,21 @@
> > dma-channels = <2>;
> > };
> >
> > + vspbc: vsp@fe920000 {
> > + compatible = "renesas,vsp2";
> > + reg = <0 0xfe920000 0 0x8000>;
> > + interrupts = <GIC_SPI 266 IRQ_TYPE_LEVEL_HIGH>;
>
> 465, according to the Dec errata?
Good catch. I'll fix that.
> > + clocks = <&cpg CPG_MOD 624>;
>
> The VSP2 modules are located in the A3VP Power Area. But adding this
> information to DT depends on the SYSC PM Domain driver.
>
> I'll try to post my WIP PM Domain patchset for R-Car ASAP...
>
> > +
> > + renesas,fcp = <&fcpvb1>;
> > +
> > + renesas,has-lut;
> > + renesas,has-sru;
> > + renesas,#rpf = <5>;
> > + renesas,#wpf = <1>;
> > + status = "disabled";
> > + };
> > +
> > fcpvb1: fcp@fe92f000 {
> > compatible = "renesas,fcpv";
> > reg = <0 0xfe92f000 0 0x200>;
> > @@ -968,6 +983,19 @@
> > power-domains = <&cpg>;
> > };
> >
> > + vspbd: vsp@fe960000 {
> > + compatible = "renesas,vsp2";
> > + reg = <0 0xfe960000 0 0x8000>;
> > + interrupts = <GIC_SPI 465 IRQ_TYPE_LEVEL_HIGH>;
>
> 266, according to the Dec errata?
--
Regards,
Laurent Pinchart
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