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Date: Tue, 1 Jun 2021 01:48:28 +0000
From: Ming Qian <ming.qian@....com>
To: Nicolas Dufresne <nicolas@...fresne.ca>,
"mchehab@...nel.org" <mchehab@...nel.org>,
"shawnguo@...nel.org" <shawnguo@...nel.org>,
"robh+dt@...nel.org" <robh+dt@...nel.org>,
"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>
CC: "hverkuil-cisco@...all.nl" <hverkuil-cisco@...all.nl>,
"kernel@...gutronix.de" <kernel@...gutronix.de>,
"festevam@...il.com" <festevam@...il.com>,
dl-linux-imx <linux-imx@....com>,
Aisheng Dong <aisheng.dong@....com>,
"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>
Subject: RE: [EXT] Re: [PATCH 1/5] dt-bindings: media: imx8q: add imx video
codec bindings
> Le lundi 31 mai 2021 à 10:51 +0800, Ming Qian a écrit :
> > Add devicetree binding documentation for IMX8Q Video Processing Unit
> > IP
> >
> > Signed-off-by: Ming Qian <ming.qian@....com>
> > Signed-off-by: Shijie Qin <shijie.qin@....com>
> > Signed-off-by: Zhou Peng <eagle.zhou@....com>
> > ---
> > .../bindings/media/nxp,imx8q-vpu.yaml | 201
> ++++++++++++++++++
> > 1 file changed, 201 insertions(+)
> > create mode 100644
> > Documentation/devicetree/bindings/media/nxp,imx8q-vpu.yaml
> >
> > diff --git
> > a/Documentation/devicetree/bindings/media/nxp,imx8q-vpu.yaml
> > b/Documentation/devicetree/bindings/media/nxp,imx8q-vpu.yaml
> > new file mode 100644
> > index 000000000000..97e428dbfdbe
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/nxp,imx8q-vpu.yaml
> > @@ -0,0 +1,201 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +
> > +%YAML 1.2
> > +---
> > +$id:
> > +https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> >
> +cetree.org%2Fschemas%2Fmedia%2Fnxp%2Cimx8q-vpu.yaml%23&data
> =04%7C
> >
> +01%7Cming.qian%40nxp.com%7C8420b2323fb844ffb7ab08d924428216%7
> C686ea1d
> >
> +3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637580690330635265%7CUnk
> nown%7CTW
> >
> +FpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJX
> VCI
> >
> +6Mn0%3D%7C1000&sdata=5D8DWb4rqnARSlauGRZ838IHPH2mHJ6wG
> GKG4688gVM%
> > +3D&reserved=0
> > +$schema:
> > +https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> >
> +cetree.org%2Fmeta-schemas%2Fcore.yaml%23&data=04%7C01%7Cmin
> g.qian
> >
> +%40nxp.com%7C8420b2323fb844ffb7ab08d924428216%7C686ea1d3bc2b4
> c6fa92cd
> >
> +99c5c301635%7C0%7C0%7C637580690330635265%7CUnknown%7CTWFp
> bGZsb3d8eyJW
> >
> +IjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C
> 1000
> >
> +&sdata=E0eIlneiBMKtz2EA%2FgFESzElq2k57nLt7u36J2n51gw%3D&
> ;reser
> > +ved=0
> > +
> > +title: NXP i.MX8Q video encode and decode accelerators
> > +
> > +maintainers:
> > + - ming_qian <ming.qian@....com>
> > + - Shijie Qin <shijie.qin@....com>
> > +
> > +description: |-
> > + The Amphion MXC video encode and decode accelerators present on NXP
> i.MX8Q SoCs.
>
> Hi, thanks for this work. Do you think it would be possible to give a version for
> the Amphion design that is in used ? This is for the posterity and/or if some
> non-NXP vendor needs to use this driver because it picked the same design.
> Though form what I understood, Allegro acquired it, and might not be
> continuing that model, it remains that is nicer if we document as much as we
> can, to give maximum relevance to you rcontribution.
Hi Nicolas,
We will add the description of the version for the Amphion IP in the V2 patch, thank you for your advice
>
> > +
> > +allOf:
> > + - $ref: /schemas/simple-bus.yaml#
> > +
> > +properties:
> > + compatible:
> > + items:
> > + - enum:
> > + - nxp,imx8qxp-vpu
> > + - nxp,imx8qm-vpu
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + power-domains:
> > + maxItems: 1
> > +
> > + memory-region:
> > + description:
> > + Phandle to a node describing reserved memory used by VPU.
> > + (see bindings/reserved-memory/reserved-memory.txt)
> > +
> > + vpu_lpcg:
> > + description:
> > + This is vpu Low-Power Clock Gate (LPCG) module.
> > +
> > + mu_m0:
> > + description:
> > + Each vpu core correspond a MU node, which used for
> communication between
> > + driver and firmware. Implement via mailbox on driver.
> > +
> > + vpu_core:
> > + type: object
> > + additionalProperties: false
> > + description:
> > + Each core correspond a decoder or encoder, need to configure
> them
> > + separately.
> > +
> > + properties:
> > + compatible:
> > + oneOf:
> > + - const: nxp,imx8q-vpu-decoder
> > + - const: nxp,imx8q-vpu-encoder
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + power-domains:
> > + maxItems: 1
> > +
> > + mbox-names:
> > + - const: tx0
> > + - const: tx1
> > + - const: rx
> > +
> > + mboxes:
> > + maxItems: 3
> > + description:
> > + List of phandle of 2 MU channels for tx, 1 MU channel for rx.
> > +
> > + boot-region:
> > + description:
> > + Phandle to a node describing reserved memory used by
> firmware
> > + loading.
> > +
> > + rpc-region:
> > + description:
> > + Phandle to a node describing reserved memory used by RPC
> shared
> > + memory between firmware and driver.
> > +
> > + print-offset:
> > + description:
> > + The memory offset from RPC address, used by reserve
> firmware log.
> > +
> > + id:
> > + description: Index of vpu core.
> > +
> > + required:
> > + - compatible
> > + - reg
> > + - power-domains
> > + - mbox-names
> > + - mboxes
> > + - boot-region
> > + - rpc-region
> > + - print-offset
> > + - id
> > +
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - power-domains
> > + - memory-region
> > + - vpu_lpcg
> > + - mu_m0
> > + - vpu_core
> > +
> > +examples:
> > + # Device node example for i.MX8QM platform:
> > + - |
> > + #include <dt-bindings/firmware/imx/rsrc.h>
> > +
> > + vpu: vpu-bus@...00000 {
> > + compatible = "nxp,imx8qm-vpu", "simple-bus";
> > + ranges = <0x2c000000 0x2c000000 0x2000000>;
> > + reg = <0x2c000000 0x1000000>;
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + power-domains = <&pd IMX_SC_R_VPU>;
> > + memory-region = <&vpu_reserved>;
> > +
> > + vpu_lpcg: clock-controller@...00000 {
> > + compatible = "fsl,imx8qxp-lpcg-vpu";
> > + reg = <0x2c000000 0x2000000>;
> > + #clock-cells = <1>;
> > + status = "disabled";
> > + };
> > +
> > + mu_m0: mailbox@...00000 {
> > + compatible = "fsl,imx6sx-mu";
> > + reg = <0x2d000000 0x20000>;
> > + interrupts = <0 472 4>;
> > + #mbox-cells = <2>;
> > + power-domains = <&pd IMX_SC_R_VPU_MU_0>;
> > + };
> > +
> > + mu1_m0: mailbox@...20000 {
> > + compatible = "fsl,imx6sx-mu";
> > + reg = <0x2d020000 0x20000>;
> > + interrupts = <0 473 4>;
> > + #mbox-cells = <2>;
> > + power-domains = <&pd IMX_SC_R_VPU_MU_1>;
> > + };
> > +
> > + mu2_m0: mailbox@...40000 {
> > + compatible = "fsl,imx6sx-mu";
> > + reg = <0x2d040000 0x20000>;
> > + interrupts = <0 474 4>;
> > + #mbox-cells = <2>;
> > + power-domains = <&pd IMX_SC_R_VPU_MU_2>;
> > + };
> > +
> > + vpu_core0: vpu_decoder@...80000 {
> > + compatible = "nxp,imx8q-vpu-decoder";
> > + reg = <0x2d080000 0x10000>;
> > + power-domains = <&pd IMX_SC_R_VPU_DEC_0>;
> > + mbox-names = "tx0", "tx1", "rx";
> > + mboxes = <&mu_m0 0 0
> > + &mu_m0 0 1
> > + &mu_m0 1 0>;
> > + boot-region = <&decoder_boot>;
> > + rpc-region = <&decoder_rpc>;
> > + print-offset = <0x180000>;
> > + id = <0>;
> > + };
> > +
> > + vpu_core1: vpu_encoder@...90000 {
> > + compatible = "nxp,imx8q-vpu-encoder";
> > + reg = <0x2d090000 0x10000>;
> > + power-domains = <&pd IMX_SC_R_VPU_ENC_0>;
> > + mbox-names = "tx0", "tx1", "rx";
> > + mboxes = <&mu1_m0 0 0
> > + &mu1_m0 0 1
> > + &mu1_m0 1 0>;
> > + boot-region = <&encoder1_boot>;
> > + rpc-region = <&encoder1_rpc>;
> > + print-offset = <0x80000>;
> > + id = <1>;
> > + };
> > +
> > + vpu_core2: vpu_encoder@...a0000 {
> > + reg = <0x2d0a0000 0x10000>;
> > + compatible = "nxp,imx8q-vpu-encoder";
> > + power-domains = <&pd IMX_SC_R_VPU_ENC_1>;
> > + mbox-names = "tx0", "tx1", "rx";
> > + mboxes = <&mu2_m0 0 0
> > + &mu2_m0 0 1
> > + &mu2_m0 1 0>;
> > + boot-region = <&encoder2_boot>;
> > + rpc-region = <&encoder2_rpc>;
> > + id = <2>;
> > + };
> > + };
> > +
> > +...
>
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