Re: [PATCH v6 02/13] dt-bindings: media: nxp,imx8mq-vpu: Update the bindings for G2 support

Philipp Zabel
2021-03-26T14:13:20Z

On Thu, Mar 18, 2021 at 09:20:35AM +0100, Benjamin Gaignard wrote:
> Introducing G2 hevc video decoder lead to modify the bindings to allow
> to get one node per VPUs.
> VPUs share one hardware control block which is provided as a phandle on
> an syscon.
> Each node got now one reg and one interrupt.
> Add a compatible for G2 hardware block: nxp,imx8mq-vpu-g2.
>
> To be compatible with older DT the driver is still capable to use 'ctrl'
> reg-name even if it is deprecated now.
>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
> ---
> version 5:
> - This version doesn't break the backward compatibilty between kernel
> and DT.
>
> .../bindings/media/nxp,imx8mq-vpu.yaml | 53 ++++++++++++-------
> 1 file changed, 34 insertions(+), 19 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml b/Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml
> index 762be3f96ce9..79502fc8bde5 100644
> --- a/Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml
> +++ b/Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml
> @@ -15,22 +15,18 @@ description:
>
> properties:
> compatible:
> - const: nxp,imx8mq-vpu
> + oneOf:
> + - const: nxp,imx8mq-vpu
> + - const: nxp,imx8mq-vpu-g2
>
> reg:
> - maxItems: 3
> -
> - reg-names:
> - items:
> - - const: g1
> - - const: g2
> - - const: ctrl
> + maxItems: 1
>
> interrupts:
> - maxItems: 2
> + maxItems: 1
>
> interrupt-names:
> - items:
> + oneOf:
> - const: g1
> - const: g2
>
> @@ -46,14 +42,18 @@ properties:
> power-domains:
> maxItems: 1
>
> + nxp,imx8mq-vpu-ctrl:
> + description: Specifies a phandle to syscon VPU hardware control block
> + $ref: "/schemas/types.yaml#/definitions/phandle"
> +

Should we drop the 'q' here, i.e. nxp,imx8m-vpu-ctrl so we can use the same
binding for i.MX8MM later?

> required:
> - compatible
> - reg
> - - reg-names
> - interrupts
> - interrupt-names
> - clocks
> - clock-names
> + - nxp,imx8mq-vpu-ctrl
>
> additionalProperties: false
>
> @@ -62,18 +62,33 @@ examples:
> #include <dt-bindings/clock/imx8mq-clock.h>
> #include <dt-bindings/interrupt-controller/arm-gic.h>
>
> - vpu: video-codec@38300000 {
> + vpu_ctrl: syscon@38320000 {
> + compatible = "nxp,imx8mq-vpu-ctrl", "syscon";
> + reg = <0x38320000 0x10000>;
> + };
> +
> + vpu_g1: video-codec@38300000 {
> compatible = "nxp,imx8mq-vpu";
> - reg = <0x38300000 0x10000>,
> - <0x38310000 0x10000>,
> - <0x38320000 0x10000>;
> - reg-names = "g1", "g2", "ctrl";
> - interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
> - <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
> - interrupt-names = "g1", "g2";
> + reg = <0x38300000 0x10000>;
> + interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "g1";
> + clocks = <&clk IMX8MQ_CLK_VPU_G1_ROOT>,
> + <&clk IMX8MQ_CLK_VPU_G2_ROOT>,

Does the G1 VPU require the G2 clock and vice versa?

regards
Philipp