Dne ponedeljek, 10. september 2018 ob 16:23:54 CEST je Maxime Ripard
napisal(a):
> On Fri, Sep 07, 2018 at 03:22:34PM +0800, Icenowy Zheng wrote:
> > The R40 HDMI PHY seems to be different to the A64 one, the A64 one
> > has no input mux, but the R40 one has.
> >
> > Drop the A64 fallback compatible from the HDMI PHY node in R40 DT.
> >
> > Signed-off-by: Icenowy Zheng <icenowy@xxxxxxx>
> > ---
> >
> > arch/arm/boot/dts/sun8i-r40.dtsi | 3 +--
> > 1 file changed, 1 insertion(+), 2 deletions(-)
> >
> > diff --git a/arch/arm/boot/dts/sun8i-r40.dtsi
> > b/arch/arm/boot/dts/sun8i-r40.dtsi index ffd9f00f74a4..5f547c161baf
> > 100644
> > --- a/arch/arm/boot/dts/sun8i-r40.dtsi
> > +++ b/arch/arm/boot/dts/sun8i-r40.dtsi
> > @@ -800,8 +800,7 @@
> >
> > };
> >
> > hdmi_phy: hdmi-phy@1ef0000 {
> >
> > - compatible = "allwinner,sun8i-r40-hdmi-phy",
> > - "allwinner,sun50i-a64-hdmi-phy";
> > + compatible = "allwinner,sun8i-r40-hdmi-phy";
>
> If you could use the A64 phy before, you can still use it now.
Not exactly. Given that we don't know how to switch between HDMI PHY clock
parents on A64 (if it is actually connected at all, there is no information
about that in manual and AW didn't answered our questions, despite asking them
through different channels), A64 compatible will be associated with quirk,
which will tell that only one clock parent is usable.
However, R40 HDMI PHY has definetly two clock parents, as it was tested by me
and Icenowy and we know how to switch between them without issues.
Technically, we could have A64 compatible there, but that would mean only
single PHY parent is considered instead of two.
Best regards,
Jernej
