Date:   Thu, 12 May 2022 12:41:13 +0530
From:   Sibi Sankar <quic_sibis@...cinc.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <bjorn.andersson@...aro.org>, <robh+dt@...nel.org>,
        Sireesh Kodali <sireeshkodali1@...il.com>
CC:     <ohad@...ery.com>, <agross@...nel.org>,
        <mathieu.poirier@...aro.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-remoteproc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <swboyd@...omium.org>,
        <mka@...omium.org>, <krzysztof.kozlowski+dt@...aro.org>
Subject: Re: [PATCH v3 2/2] dt-bindings: remoteproc: qcom: Add SC7280 MSS
 bindings

Hey Krzysztof,

Thanks for taking time to review the patch series.

On 5/11/22 11:40 PM, Krzysztof Kozlowski wrote:
> On 11/05/2022 10:19, Sibi Sankar wrote:
>> Add MSS PIL loading bindings for SC7280 SoCs.
> 
> Why not converting existing bindings? The compatible is already there,
> so you duplicated its binding.

I'll make sure that all references to the sc7280 mss gets deleted from
the main binding doc in the next-respin.


https://lore.kernel.org/lkml/CAE-0n51KBYjZvwGNy06_okmEWjEfRLQO54CYaY6-JnbBk6kOhA@mail.gmail.com/

https://lore.kernel.org/lkml/YUps1JfGtf6JdbCx@ripper/

Bjorn/Stephen gave the above comments when the wpss bindings was in the 
process of being merged. It was agreed that a single big clunky binding
with a lot of if/else would be confusing and Bjorn wanted a separate
file for it specifically because it overrides a pas compatible. SC7280 
mss satisfies both the requirements.

> 
>>
>> Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
>> ---
>>
>> v3:
>>   * Re-ordered clock list, fixed pdc_sync typo [Rob/Matthias]
>>
>>   .../bindings/remoteproc/qcom,sc7280-mss-pil.yaml   | 261 +++++++++++++++++++++
>>   1 file changed, 261 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/remoteproc/qcom,sc7280-mss-pil.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,sc7280-mss-pil.yaml b/Documentation/devicetree/bindings/remoteproc/qcom,sc7280-mss-pil.yaml
>> new file mode 100644
>> index 000000000000..2f95bfd7b3eb
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/remoteproc/qcom,sc7280-mss-pil.yaml
>> @@ -0,0 +1,261 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/remoteproc/qcom,sc7280-mss-pil.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm SC7280 MSS Peripheral Image Loader
>> +
>> +maintainers:
>> +  - Sibi Sankar <quic_sibis@...cinc.com>
>> +
>> +description:
>> +  This document defines the binding for a component that loads and boots firmware
>> +  on the Qualcomm Technology Inc. SC7280 Modem Hexagon Core.
> 
> s/This document defines the binding for//
> Instead describe the hardware.

ack

> 
> 
> Anyway, similar patch was already sent:
> https://lore.kernel.org/all/20220511161602.117772-7-sireeshkodali1@gmail.com/
> Except its several issues, it is much more complete and specific.

same reason as detailed above.

> 
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - qcom,sc7280-mss-pil
>> +
>> +  reg:
>> +    items:
>> +      - description: MSS QDSP6 registers
>> +      - description: RMB registers
>> +
>> +  reg-names:
>> +    items:
>> +      - const: qdsp6
>> +      - const: rmb
>> +
>> +  iommus:
>> +    items:
>> +      - description: MSA Stream 1
>> +      - description: MSA Stream 2
>> +
>> +  interconnects:
>> +    items:
>> +      - description: Path leading to system memory
>> +
>> +  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: GCC MSS IFACE clock
>> +      - description: GCC MSS OFFLINE clock
>> +      - description: GCC MSS SNOC_AXI clock
>> +      - description: RPMH PKA clock
>> +      - description: RPMH XO clock
>> +
>> +  clock-names:
>> +    items:
>> +      - const: iface
>> +      - const: offline
>> +      - const: snoc_axi
>> +      - const: pka
>> +      - const: xo
>> +
>> +  power-domains:
>> +    items:
>> +      - description: CX power domain
>> +      - description: MSS power domain
>> +
>> +  power-domain-names:
>> +    items:
>> +      - const: cx
>> +      - const: mss
>> +
>> +  resets:
>> +    items:
>> +      - description: AOSS restart
>> +      - description: PDC reset
>> +
>> +  reset-names:
>> +    items:
>> +      - const: mss_restart
>> +      - const: pdc_reset
>> +
>> +  memory-region:
>> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> 
> This should be defined by core schema and ref should not be needed.
> 
>> +    description: Phandle reference to the reserved-memory for the MBA region followed
>> +                 by the modem region.
> 
> maxItems

ack

> 
>> +
>> +  firmware-name:
>> +    $ref: /schemas/types.yaml#/definitions/string
>> +    description:
>> +      The name of the firmware which should be loaded for this remote
>> +      processor.
>> +
>> +  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, modem, nc and vq6 halt registers.
>> +
>> +  qcom,ext-regs:
>> +    $ref: /schemas/types.yaml#/definitions/phandle-array
>> +    description:
>> +      Two phandle references to syscons representing TCSR_REG and TCSR register
>> +      space followed by the two offsets within the syscon to force_clk_en/rscc_disable
>> +      and axim1_clk_off/crypto_clk_off registers respectively.
>> +
>> +  qcom,qaccept-regs:
>> +    $ref: /schemas/types.yaml#/definitions/phandle-array
>> +    description:
>> +      Phandle reference to a syscon representing TCSR followed by the
>> +      three offsets within syscon for mdm, cx and axi qaccept registers.
>> +
>> +  qcom,qmp:
>> +    $ref: /schemas/types.yaml#/definitions/phandle
>> +    description: Reference to the AOSS side-channel message RAM.
>> +
>> +  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:
>> +    $ref: /schemas/types.yaml#/definitions/string
> 
> For some reason you decided to make the same mistakes as the
> https://lore.kernel.org/all/20220511161602.117772-7-sireeshkodali1@gmail.com/
> 
> even though all other bindings with this property looks correct.
> 
> Please, re-use existing bindings, do not reinvent things in incorrect way.
> 
> I'll stop the review, you need to align first.
> 
> What is weird, your v2 was before Sireesh's patch, and you both made the
> same mistakes which do not exist in current bindings.

I guess he used the qcom,sc7280-wpss-pil.yaml for reference as well lol.
Sure I'll allign with him and who gets to post what.

> 
> All comments from his set apply here. It seems that his patchset came
> after yours and copied stuff from your bindings, so yours would be FIFO,
> if you made proper binding conversion.
> 
> Best regards,
> Krzysztof
> 

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