linux-kernel - Re: [PATCH] clk: qcom: Update the force mem core bit for GPU clocks

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Message-ID: <21cd992c-334e-3a28-f3ac-68a49a4ef00b@quicinc.com>
Date:   Mon, 7 Nov 2022 11:08:03 +0530
From:   "Satya Priya Kakitapalli (Temp)" <quic_c_skakit@...cinc.com>
To:     Stephen Boyd <swboyd@...omium.org>, Andy Gross <agross@...nel.org>,
        "Bjorn Andersson" <andersson@...nel.org>
CC:     Douglas Anderson <dianders@...omium.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <quic_tdas@...cinc.com>, <linux-clk@...r.kernel.org>
Subject: Re: [PATCH] clk: qcom: Update the force mem core bit for GPU clocks


On 10/28/2022 5:54 AM, Stephen Boyd wrote:
> Quoting Satya Priya (2022-10-18 23:05:35)
>> From: Taniya Das <quic_tdas@...cinc.com>
>>
>> There are few GPU clocks which are powering up the memories
>> and thus enable the FORCE_MEM_PERIPH always for these clocks
>> to force the periph_on signal to remain active during halt
>> state of the clock.
> I take it that missing this causes GPU to lose state when it suspends
> and that confuses the driver?


It is more related to GPU SMMU states and the stability issues that are 
encountered.