linux-kernel - Re: [PATCH RESEND v3 4/5] clk: qcom: Use HW_CTRL_TRIGGER flag to switch video GDSC to HW mode

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Date:   Wed, 1 Nov 2023 23:31:23 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Abel Vesa <abel.vesa@...aro.org>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Kevin Hilman <khilman@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Stanimir Varbanov <stanimir.k.varbanov@...il.com>,
        Vikash Garodia <quic_vgarodia@...cinc.com>,
        "Bryan O'Donoghue" <bryan.odonoghue@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Taniya Das <tdas@....qualcomm.com>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-media@...r.kernel.org,
        Jagadeesh Kona <quic_jkona@...cinc.com>
Subject: Re: [PATCH RESEND v3 4/5] clk: qcom: Use HW_CTRL_TRIGGER flag to
 switch video GDSC to HW mode

On Wed, 1 Nov 2023 at 11:06, Abel Vesa <abel.vesa@...aro.org> wrote:
>
> From: Jagadeesh Kona <quic_jkona@...cinc.com>
>
> The current HW_CTRL flag switches the video GDSC to HW control mode as
> part of GDSC enable itself, instead of that use HW_CTRL_TRIGGER flag to
> give consumer drivers more control and switch the GDSC mode as and when
> required.
>
> HW_CTRL_TRIGGER flag allows consumer drivers to switch the video GDSC to
> HW/SW control modes at runtime using dev_pm_genpd_set_hwmode API.

Will existing venus driver continue to work with this patch being applied?

>
> Signed-off-by: Jagadeesh Kona <quic_jkona@...cinc.com>
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> ---
>  drivers/clk/qcom/videocc-sc7180.c | 2 +-
>  drivers/clk/qcom/videocc-sc7280.c | 2 +-
>  drivers/clk/qcom/videocc-sdm845.c | 4 ++--
>  drivers/clk/qcom/videocc-sm8250.c | 4 ++--
>  drivers/clk/qcom/videocc-sm8550.c | 4 ++--
>  5 files changed, 8 insertions(+), 8 deletions(-)


-- 
With best wishes
Dmitry