Re: [PATCH v3 5/7] media: dt-bindings: rockchip: Document RK3399 Video Decoder bindings

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On Sat, Dec 14, 2019 at 4:38 AM Boris Brezillon
<boris.brezillon@xxxxxxxxxxxxx> wrote:
>
> On Fri, 13 Dec 2019 17:23:32 +0200
> Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
>
> > Hi Boris,
> >
> > Thank you for the patch.
> >
> > On Fri, Dec 13, 2019 at 01:54:12PM +0100, Boris Brezillon wrote:
> > > Document the Rockchip RK3399 Video Decoder bindings.
> > >
> > > Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
> > > ---
> > > Changes in v3:
> > > * Fix dtbs_check failures
> > > ---
> > >  .../bindings/media/rockchip,vdec.yaml         | 71 +++++++++++++++++++
> > >  1 file changed, 71 insertions(+)
> > >  create mode 100644 Documentation/devicetree/bindings/media/rockchip,vdec.yaml
> > >
> > > diff --git a/Documentation/devicetree/bindings/media/rockchip,vdec.yaml b/Documentation/devicetree/bindings/media/rockchip,vdec.yaml
> > > new file mode 100644
> > > index 000000000000..7167c3d6a389
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/media/rockchip,vdec.yaml
> > > @@ -0,0 +1,71 @@
> > > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/media/rockchip,vdec.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Rockchip Video Decoder (VDec) Device Tree Bindings
> > > +
> > > +maintainers:
> > > +  - Heiko Stuebner <heiko@xxxxxxxxx>
> > > +
> > > +description: |-
> > > +  The Rockchip rk3399 has a stateless Video Decoder that can decodes H.264,
> > > +  HEVC an VP9 streams.
> > > +
> > > +properties:
> > > +  compatible:
> > > +    const: rockchip,rk3399-vdec
> > > +
> > > +  reg:
> > > +    maxItems: 1
> > > +
> > > +  interrupts:
> > > +    maxItems: 1
> > > +
> > > +  clocks:
> > > +    items:
> > > +      - description: The Video Decoder AXI interface clock
> > > +      - description: The Video Decoder AHB interface clock
> > > +      - description: The Video Decoded CABAC clock
> > > +      - description: The Video Decoder core clock
> > > +
> > > +  clock-names:
> > > +    items:
> > > +      - const: aclk
> >
> > How about calling it "axi" ? None of the other clock names have "clk".
> >
> > > +      - const: iface
> >
> > And "ahb" here, as the AXI interface clock is also an interface clock ?
>
> Sure, I can do that.

Another possibility: "master" for the AXI clock, and "slave" for the AHB clock.
The AXI interface is likely the DMA master, while the AHB interface is a slave
interface for the control registers.

This is mostly based on hints from the crypto block.

ChenYu

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