Re: [RFC PATCH V1 3/6] dt-bindings: mt8183: Added FD dt-bindings

Jerry-ch Chen
2019-05-07T13:53:30Z

Hi Rob,

Thank you for your comments.

On Wed, 2019-05-01 at 17:46 -0500, Rob Herring wrote:
> On Tue, Apr 23, 2019 at 06:45:02PM +0800, Jerry-ch Chen wrote:
> > From: Jerry-ch Chen <jerry-ch.chen@mediatek.com>
> >
> > This patch adds DT binding documentation for the Face Detection (FD)
> > unit of the camera system on Mediatek's SoCs.
> >
> > Signed-off-by: Jerry-ch Chen <jerry-ch.chen@mediatek.com>
> > ---
> > .../bindings/media/mediatek,mt8183-fd.txt | 34 +++++++++++++++++++
> > 1 file changed, 34 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/media/mediatek,mt8183-fd.txt
> >
> > diff --git a/Documentation/devicetree/bindings/media/mediatek,mt8183-fd.txt b/Documentation/devicetree/bindings/media/mediatek,mt8183-fd.txt
> > new file mode 100644
> > index 000000000000..97c12fd93e7e
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/mediatek,mt8183-fd.txt
> > @@ -0,0 +1,34 @@
> > +* Mediatek Face Detection Unit (FD)
> > +
> > +Face Detection (FD) unit is a typical memory-to-memory HW device.
> > +It provides hardware accelerated face detection function, and it
> > +is able to detect different poses of faces. FD will writre result
> > +of detected face into memory as output.
> > +
> > +Required properties:
> > +- compatible: "mediatek,mt8183-fd"
> > +- reg: Physical base address and length of the function block register space
> > +- interrupts: interrupt number to the cpu.
> > +- iommus: should point to the respective IOMMU block with master port as
> > + argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
> > + for details.
>
> How many entries? Looks like 3 from the example.
>

Yes, we have 3 entries. I would like to update this part as
following:

iommus: should point to the 3 entries: M4U_PORT_CAM_FDVT_RP,
M4U_PORT_CAM_FDVT_WR and M4U_PORT_CAM_FDVT_RB. (Please see
Documentation/devicetree/bindings/iommu/mediatek,iommu.txt for details.)

> > +- mediatek,larb: must contain the local arbiters in the current Socs, see
> > + Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt
> > + for details.
> > +- clocks : must contain the FDVT clock
> > +- clock-names: must contain FD_CLK_IMG_FD
> > +
> > +Example:
> > + fd:fd@1502b000 {
> ^ space needed
>

We will fix it in next version of the patch.

> > + compatible = "mediatek,mt8183-fd";
> > + mediatek,larb = <&larb5>;
> > + mediatek,scp = <&scp>;
> > + iommus = <&iommu M4U_PORT_CAM_FDVT_RP>,
> > + <&iommu M4U_PORT_CAM_FDVT_WR>,
> > + <&iommu M4U_PORT_CAM_FDVT_RB>;
> > + reg = <0 0x1502b000 0 0x1000>;
> > + interrupts = <GIC_SPI 269 IRQ_TYPE_LEVEL_LOW>;
> > + clocks = <&imgsys CLK_IMG_FDVT>;
> > + clock-names = "FD_CLK_IMG_FD";
> > + };
> > +
> > --
> > 2.18.0
> >

Sincerely,

Jerry