linux-kernel - Re: [v2 1/2] clk: qcom: gdsc: Add support to update GDSC transition delay

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Date:   Thu, 24 Feb 2022 13:55:05 -0800
From:   Stephen Boyd <sboyd@...nel.org>
To:     Michael Turquette <mturquette@...libre.com>,
        Taniya Das <tdas@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Rajendra Nayak <rnayak@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Taniya Das <tdas@...eaurora.org>
Subject: Re: [v2 1/2] clk: qcom: gdsc: Add support to update GDSC transition delay

Quoting Taniya Das (2022-02-23 10:56:05)
> GDSCs have multiple transition delays which are used for the GDSC FSM
> states. Older targets/designs required these values to be updated from
> gdsc code to certain default values for the FSM state to work as
> expected. But on the newer targets/designs the values updated from the
> GDSC driver can hamper the FSM state to not work as expected.
> 
> On SC7180 we observe black screens because the gdsc is being
> enabled/disabled very rapidly and the GDSC FSM state does not work as
> expected. This is due to the fact that the GDSC reset value is being
> updated from SW.
> 
> Thus add support to update the transition delay from the clock
> controller gdscs as required.
> 
> Fixes: 45dd0e55317cc ("clk: qcom: Add support for GDSCs)
> Signed-off-by: Taniya Das <tdas@...eaurora.org>
> ---

Looks like I need to apply this for clk-fixes. Please keep Bjorn on Cc
next time for awareness.