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Date: Thu, 8 Jun 2023 18:29:05 +0530
From: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
<agross@...nel.org>, <andersson@...nel.org>,
<konrad.dybcio@...aro.org>, <robh+dt@...nel.org>,
<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
<jassisinghbrar@...il.com>, <mathieu.poirier@...aro.org>,
<mturquette@...libre.com>, <sboyd@...nel.org>,
<quic_eberman@...cinc.com>, <quic_mojha@...cinc.com>,
<kvalo@...nel.org>, <loic.poulain@...aro.org>,
<linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-remoteproc@...r.kernel.org>,
<linux-clk@...r.kernel.org>
CC: <quic_srichara@...cinc.com>, <quic_sjaganat@...cinc.com>,
<quic_kathirav@...cinc.com>, <quic_anusha@...cinc.com>,
<quic_poovendh@...cinc.com>, <quic_varada@...cinc.com>,
<quic_devipriy@...cinc.com>
Subject: Re: [PATCH V2 01/13] dt-bindings: remoteproc: qcom: Add support for
multipd model
On 5/30/2023 4:28 PM, Krzysztof Kozlowski wrote:
> On 22/05/2023 00:28, Manikanta Mylavarapu wrote:
>> Add new binding document for multipd model remoteproc.
>> IPQ5018, IPQ9574 follows multipd model.
>>
>> Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
>> ---
>> Changes in V2:
>> - Fixed all comments and rebased for TOT.
>> - Changed to BSD-3-Clause based on internal open source team
>> suggestion.
>> - Added firmware-name.
>>
>> .../bindings/remoteproc/qcom,multipd-pil.yaml | 265 ++++++++++++++++++
>> 1 file changed, 265 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/remoteproc/qcom,multipd-pil.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,multipd-pil.yaml b/Documentation/devicetree/bindings/remoteproc/qcom,multipd-pil.yaml
>> new file mode 100644
>> index 000000000000..3257f27dc569
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/remoteproc/qcom,multipd-pil.yaml
>> @@ -0,0 +1,265 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/remoteproc/qcom,multipd-pil.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm Multipd Secure Peripheral Image Loader
>> +
>> +maintainers:
>> + - Bjorn Andersson <andersson@...nel.org>
>> + - Mathieu Poirier <mathieu.poirier@...aro.org>
>> +
>> +description:
>> + Multipd Peripheral Image Loader loads firmware and boots Q6 pd, WCSS pd
>
> ... boots Q6 Protection Domain (PD), WCSS PD ...
>
>> + remoteproc's on the Qualcomm IPQ5018, IPQ9574 SoC.
>
>> Pd means protection
>> + domain.
>
> so you can skip this sentence as it is explained already.
>
>> It's similar to process in Linux. Here QDSP6 processor runs each
>> + wifi radio functionality on a separate process. One process can't access
>> + other process resources, so this is termed as PD i.e protection domain.
>> +
>> +properties:
>> + compatible:
>> + enum:
>> + - qcom,ipq5018-q6-mpd
>> + - qcom,ipq9574-q6-mpd
>> +
>> + reg:
>> + maxItems: 1
>> +
>> + firmware-name:
>> + $ref: /schemas/types.yaml#/definitions/string-array
>> + description: Firmware name of the Hexagon core
>
> No need for ref and description. Instead maxItems.
>
>> +
>> + interrupts-extended:
>> + items:
>> + - description: Watchdog interrupt
>> + - description: Fatal interrupt
>> + - description: Ready interrupt
>> + - description: Handover interrupt
>> + - description: Stop acknowledge interrupt
>> +
>> + interrupt-names:
>> + items:
>> + - const: wdog
>> + - const: fatal
>> + - const: ready
>> + - const: handover
>> + - const: stop-ack
>> +
>> + qcom,smem-states:
>> + $ref: /schemas/types.yaml#/definitions/phandle-array
>> + description: States used by the AP to signal the remote processor
>> + items:
>> + - description: Shutdown Q6
>> + - description: Stop Q6
>> +
>> + qcom,smem-state-names:
>> + description:
>> + Names of the states used by the AP to signal the remote processor
>> + items:
>> + - const: shutdown
>> + - const: stop
>> +
>> + memory-region:
>> + items:
>> + - description: Q6 pd reserved region
>> +
>> + glink-edge:
>> + $ref: /schemas/remoteproc/qcom,glink-edge.yaml#
>> + description:
>> + Qualcomm G-Link subnode which represents communication edge, channels
>> + and devices related to the Modem.
>> +
>> +patternProperties:
>> + "^pd-1|pd-2|pd-3":
>> + type: object
>> + description:
>> + In Multipd model, WCSS pd depends on Q6 pd i.e Q6 pd should be up before
>> + WCSS. It can be achieved by keeping wcss pd node as subnode of Q6
>> + device node.
>
> That's not enough. Your description does not say what is this, why you
> have two protection domains for same compatible. What's more, it a bit
> deviates from hardware description.
>
>> +
>> + properties:
>> + compatible:
>> + enum:
>> + - qcom,ipq5018-wcss-ahb-mpd
>> + - qcom,ipq9574-wcss-ahb-mpd
>> + - qcom,ipq5018-wcss-pcie-mpd
>
> Keep rather alphabetical order (so both 5018 together).
>
> I also do not understand these at all. Why adding bus type to
> compatible? This rarely is allowed (unless it is PCIe controller within
> soc).
>
>> +
>> + firmware-name:
>> + $ref: /schemas/types.yaml#/definitions/string-array
>> + items:
>> + - description: Firmware name of the Hexagon core
>
> same comments
>
>> +
>> + interrupts-extended:
>> + items:
>> + - description: Fatal interrupt
>> + - description: Ready interrupt
>> + - description: Spawn acknowledge interrupt
>> + - description: Stop acknowledge interrupt
>
> ditto
>
>> +
>> + interrupt-names:
>> + items:
>> + - const: fatal
>> + - const: ready
>> + - const: spawn-ack
>> + - const: stop-ack
>> +
>> + qcom,smem-states:
>> + $ref: /schemas/types.yaml#/definitions/phandle-array
>> + description: States used by the AP to signal the remote processor
>> + items:
>> + - description: Shutdown WCSS pd
>> + - description: Stop WCSS pd
>> + - description: Spawn WCSS pd
>> +
>> + qcom,smem-state-names:
>> + description:
>> + Names of the states used by the AP to signal the remote processor
>> + items:
>> + - const: shutdown
>> + - const: stop
>> + - const: spawn
>> +
>> + required:
>> + - compatible
>> + - firmware-name
>> + - interrupts-extended
>> + - interrupt-names
>> + - qcom,smem-states
>> + - qcom,smem-state-names
>> +
>> + unevaluatedProperties: false
>> +
>> +required:
>> + - compatible
>> + - firmware-name
>> + - reg
>> + - interrupts-extended
>> + - interrupt-names
>> + - qcom,smem-states
>> + - qcom,smem-state-names
>> + - memory-region
>> +
>> +allOf:
>> + - if:
>> + properties:
>> + compatible:
>> + contains:
>> + enum:
>> + - qcom,ipq5018-q6-mpd
>> + then:
>> + properties:
>> + firmware-name:
>> + items:
>> + - const: IPQ5018/q6_fw.mdt
>> + - const: IPQ5018/m3_fw.mdt
>> + - const: qcn6122/m3_fw.mdt
>
> No, names are not part of bindings. Also paths do not look correct. Open
> linux-firmware package and verify these are good...
>
I will remove names from bindings and use firmware path as per
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/ath11k/IPQ5018/hw1.0
>> +
>> + - if:
>> + properties:
>> + compatible:
>> + contains:
>> + enum:
>> + - qcom,ipq9574-q6-mpd
>> + then:
>> + properties:
>> + firmware-name:
>> + items:
>> + - const: IPQ9574/q6_fw.mdt
>> + - const: IPQ9574/m3_fw.mdt
>
> Drop.
>
I will drop.
Thanks & Regards,
Manikanta.
>> +
>> +unevaluatedProperties: false
>
> This changed... why?
>
>
> Best regards,
> Krzysztof
>
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