linux-kernel - Re: [PATCH v8 1/7] dt-bindings: remoteproc: qcom: Add SC7280 ADSP support

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Date:   Fri, 23 Sep 2022 19:23:26 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>,
        linux-remoteproc@...r.kernel.org, agross@...nel.org,
        andersson@...nel.org, lgirdwood@...il.com, broonie@...nel.org,
        robh+dt@...nel.org, quic_plai@...cinc.com, bgoswami@...cinc.com,
        perex@...ex.cz, tiwai@...e.com, srinivas.kandagatla@...aro.org,
        quic_rohkumar@...cinc.com, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, swboyd@...omium.org,
        judyhsiao@...omium.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v8 1/7] dt-bindings: remoteproc: qcom: Add SC7280 ADSP
 support

On 23/09/2022 15:05, Srinivasa Rao Mandadapu wrote:
> Add ADSP PIL loading support for SC7280 SoCs.
> 
> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
> Reviewed-by: Rob Herring <robh@...nel.org>
> Reviewed-by: Stephen Boyd <swboyd@...omium.org>
> ---
> Changes since V7:
> 	-- Remove redundant clocks in dt bindings.
> 	-- Fix dt compilation error in dt bindings.
> Changes since V6:
> 	-- Update glink-edge property.
> 	-- Add qcom,qmp property.
> Changes since V5:
> 	-- Remove qcom,adsp-memory-regions property.
> Changes since V4:
> 	-- Update halt registers description in dt bindings.
> 
>  .../bindings/remoteproc/qcom,sc7280-adsp-pil.yaml  | 207 +++++++++++++++++++++
>  1 file changed, 207 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/qcom,sc7280-adsp-pil.yaml
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,sc7280-adsp-pil.yaml b/Documentation/devicetree/bindings/remoteproc/qcom,sc7280-adsp-pil.yaml
> new file mode 100644
> index 0000000..79ef3c0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/qcom,sc7280-adsp-pil.yaml
> @@ -0,0 +1,207 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/remoteproc/qcom,sc7280-adsp-pil.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm SC7280 ADSP Peripheral Image Loader
> +
> +maintainers:
> +  - Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
> +
> +description:
> +  This document describes the hardware for a component that loads and boots firmware
> +  on the Qualcomm Technology Inc. ADSP.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,sc7280-adsp-pil
> +
> +  reg:
> +    minItems: 1
> +    items:
> +      - description: qdsp6ss register
> +      - description: efuse q6ss register

Why second IO address space is optional?

> +
> +  interrupts:
> +    items:
> +      - description: Watchdog interrupt
> +      - description: Fatal interrupt
> +      - description: Ready interrupt
> +      - description: Handover interrupt
> +      - description: Stop acknowledge interrupt
> +      - description: Shutdown acknowledge interrupt
> +
> +  interrupt-names:
> +    items:
> +      - const: wdog
> +      - const: fatal
> +      - const: ready
> +      - const: handover
> +      - const: stop-ack
> +      - const: shutdown-ack
> +
> +  clocks:
> +    items:
> +      - description: XO clock
> +      - description: GCC CFG NOC LPASS clock
> +
> +  clock-names:
> +    items:
> +      - const: xo
> +      - const: gcc_cfg_noc_lpass
> +
> +  power-domains:
> +    items:
> +      - description: LCX power domain
> +
> +  resets:
> +    items:
> +      - description: PDC AUDIO SYNC RESET
> +      - description: CC LPASS restart
> +
> +  reset-names:
> +    items:
> +      - const: pdc_sync
> +      - const: cc_lpass
> +
> +  memory-region:
> +    maxItems: 1
> +    description: Reference to the reserved-memory for the Hexagon core
> +
> +  qcom,halt-regs:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description:
> +      Phandle reference to a syscon representing TCSR followed by the
> +      four offsets within syscon for q6, CE, AXI and qv6 halt registers.
> +    items:
> +      items:

This has to be strictly defined, IOW, the second items must be already
an item of previous list. Look at the other mss-pil.

> +        - description: phandle to TCSR MUTEX
> +        - description: offset to q6 halt registers
> +        - description: offset to CE halt registers
> +        - description: offset to AXI halt registers
> +        - description: offset to qv6 halt registers
> +
> +  qcom,smem-states:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description: States used by the AP to signal the Hexagon core
> +    items:
> +      - description: Stop the modem
> +
> +  qcom,smem-state-names:
> +    description: The names of the state bits used for SMP2P output
> +    const: stop
> +
> +  qcom,qmp:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: Reference to the AOSS side-channel message RAM.
> +
> +  glink-edge:
> +    type: object

Missing ref to glink-edge and unevaluatedProperties:false. Please take a
look at recent
Documentation/devicetree/bindings/remoteproc/qcom,sc7180-mss-pil.yaml

> +    description: |
> +      Qualcomm G-Link subnode which represents communication edge, channels
> +      and devices related to the ADSP.
> +
> +    properties:
> +      interrupts:
> +        items:
> +          - description: IRQ from ADSP to GLINK

Skip interrupts and mboxes - both are coming from glink-edge.

> +
> +      mboxes:
> +        items:
> +          - description: Mailbox for communication between APPS and ADSP
> +
> +      label:
> +        description: The names of the state bits used for SMP2P output

Skip description

> +        items:
> +          - const: lpass

No items, just const: lpass

> +
> +      qcom,remote-pid:
> +        $ref: /schemas/types.yaml#/definitions/uint32
> +        description: ID of the shared memory used by GLINK for communication with ADSP

This can be dropped.

> +
> +      gpr: true
> +      apr: false
> +      fastrpc: false


BTW, all these three do not make sense without ref to glink-edge. After
adding ref, these seem reasonable.

> +
> +    required:
> +      - interrupts
> +      - mboxes
> +      - label
> +      - qcom,remote-pid
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - interrupt-names
> +  - clocks
> +  - clock-names
> +  - power-domains
> +  - resets
> +  - reset-names
> +  - qcom,halt-regs
> +  - memory-region
> +  - qcom,smem-states
> +  - qcom,smem-state-names
> +  - qcom,qmp
> +
> +additionalProperties: false

Best regards,
Krzysztof