linux-kernel - Re: [PATCH v2 1/2] clk: qcom: gcc-sc7180: Keep the USB GDSC always on

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220826024003.qpqtdmdohdmpcskt@baldur>
Date:   Thu, 25 Aug 2022 21:40:03 -0500
From:   Bjorn Andersson <andersson@...nel.org>
To:     Matthias Kaehlcke <mka@...omium.org>,
        Rajendra Nayak <quic_rjendra@...cinc.com>
Cc:     Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Johan Hovold <johan+linaro@...nel.org>,
        linux-clk@...r.kernel.org,
        Krishna Kurapati <quic_kriskura@...cinc.com>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Douglas Anderson <dianders@...omium.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: Re: [PATCH v2 1/2] clk: qcom: gcc-sc7180: Keep the USB GDSC always on

On Thu, Aug 25, 2022 at 06:21:58PM -0700, Matthias Kaehlcke wrote:
> When the GDSC is disabled during system suspend USB is broken on
> sc7180 when the system resumes. Mark the GDSC as always on to
> make sure USB still works after system suspend.
> 
> Signed-off-by: Matthias Kaehlcke <mka@...omium.org>

Rajendra, where you able to find some time to look into take the GDSC
into retention state? Do you suggest that I merge these two patches for
now?

Thanks,
Bjorn

> ---
> I'm not entirely sure that this is the correct solution. What makes
> me doubt is that only msm8953 sets ALWAYS_ON for the USB GDSC. Is USB
> broken after suspend on all the other QC platforms?
> 
> Changes in v2:
> - set the flags of the GDSC not of the GDSC power domain
> - updated commit message
> 
>  drivers/clk/qcom/gcc-sc7180.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/clk/qcom/gcc-sc7180.c b/drivers/clk/qcom/gcc-sc7180.c
> index c2ea09945c47..c0d7509a782e 100644
> --- a/drivers/clk/qcom/gcc-sc7180.c
> +++ b/drivers/clk/qcom/gcc-sc7180.c
> @@ -2225,6 +2225,7 @@ static struct gdsc usb30_prim_gdsc = {
>  		.name = "usb30_prim_gdsc",
>  	},
>  	.pwrsts = PWRSTS_OFF_ON,
> +	.flags = ALWAYS_ON,
>  };
>  
>  static struct gdsc hlos1_vote_mmnoc_mmu_tbu_hf0_gdsc = {
> -- 
> 2.37.2.672.g94769d06f0-goog
>