linux-kernel - Re: [PATCH v7 0/6] clk/qcom: Support gdsc collapse polling using 'reset' interface

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Date:   Mon, 7 Nov 2022 22:24:49 +0530
From:   Akhil P Oommen <quic_akhilpo@...cinc.com>
To:     freedreno <freedreno@...ts.freedesktop.org>,
        <dri-devel@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        Rob Clark <robdclark@...il.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
CC:     Douglas Anderson <dianders@...omium.org>,
        <krzysztof.kozlowski@...aro.org>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>, Sean Paul <sean@...rly.run>,
        Stephen Boyd <sboyd@...nel.org>, <devicetree@...r.kernel.org>,
        <linux-clk@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v7 0/6] clk/qcom: Support gdsc collapse polling using
 'reset' interface

On 10/5/2022 2:36 PM, Akhil P Oommen wrote:
> Some clients like adreno gpu driver would like to ensure that its gdsc
> is collapsed at hardware during a gpu reset sequence. This is because it
> has a votable gdsc which could be ON due to a vote from another subsystem
> like tz, hyp etc or due to an internal hardware signal. To allow
> this, gpucc driver can expose an interface to the client driver using
> reset framework. Using this the client driver can trigger a polling within
> the gdsc driver.
>
> This series is rebased on top of qcom/linux:for-next branch.
>
> Related discussion: https://patchwork.freedesktop.org/patch/493144/
>
> Changes in v7:
> - Update commit message (Bjorn)
> - Rebased on top of qcom/linux:for-next branch.
>
> Changes in v6:
> - No code changes in this version. Just captured the Acked-by tags
>
> Changes in v5:
> - Nit: Remove a duplicate blank line (Krzysztof)
>
> Changes in v4:
> - Update gpu dt-binding schema
> - Typo fix in commit text
>
> Changes in v3:
> - Use pointer to const for "struct qcom_reset_ops" in qcom_reset_map (Krzysztof)
>
> Changes in v2:
> - Return error when a particular custom reset op is not implemented. (Dmitry)
>
> Akhil P Oommen (6):
>    dt-bindings: clk: qcom: Support gpu cx gdsc reset
>    clk: qcom: Allow custom reset ops
>    clk: qcom: gdsc: Add a reset op to poll gdsc collapse
>    clk: qcom: gpucc-sc7280: Add cx collapse reset support
>    dt-bindings: drm/msm/gpu: Add optional resets
>    arm64: dts: qcom: sc7280: Add Reset support for gpu
>
>   .../devicetree/bindings/display/msm/gpu.yaml       |  6 +++++
>   arch/arm64/boot/dts/qcom/sc7280.dtsi               |  3 +++
>   drivers/clk/qcom/gdsc.c                            | 23 ++++++++++++++----
>   drivers/clk/qcom/gdsc.h                            |  7 ++++++
>   drivers/clk/qcom/gpucc-sc7280.c                    | 10 ++++++++
>   drivers/clk/qcom/reset.c                           | 27 +++++++++++++++++++++-
>   drivers/clk/qcom/reset.h                           |  8 +++++++
>   include/dt-bindings/clock/qcom,gpucc-sc7280.h      |  3 +++
>   8 files changed, 82 insertions(+), 5 deletions(-)
>
Bjorn,

The latest patchset has been in the mailing list for over a month now. 
Could you please share how soon we can pick this? That will give me some 
confidence to pull these patches into our chromeos kernel tree ASAP.

-Akhil.