linux-kernel - Re: [PATCH v6] clk: qcom: dispcc-sm8750: Fix setting rate byte and pixel clocks

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: <ipdt2r25de4zi7zovntb7vopah23on4dr7l2ui3ieevapzdveq@3dtvuhtrdlww>
Date: Wed, 21 May 2025 00:27:04 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, Abhinav Kumar <quic_abhinavk@...cinc.com>
Subject: Re: [PATCH v6] clk: qcom: dispcc-sm8750: Fix setting rate byte and
 pixel clocks

On Tue, May 20, 2025 at 11:07:42AM +0200, Krzysztof Kozlowski wrote:
> On SM8750 the setting rate of pixel and byte clocks, while the parent
> DSI PHY PLL, fails with:
> 
>   disp_cc_mdss_byte0_clk_src: rcg didn't update its configuration.
> 
> DSI PHY PLL has to be unprepared and its "PLL Power Down" bits in
> CMN_CTRL_0 asserted.
> 
> Mark these clocks with CLK_OPS_PARENT_ENABLE to ensure the parent is
> enabled during rate changes.
> 
> Cc: <stable@...r.kernel.org>
> Fixes: f1080d8dab0f ("clk: qcom: dispcc-sm8750: Add SM8750 Display clock controller")
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> 
> ---
> 
> Changes in v6:
> 1. Add CLK_OPS_PARENT_ENABLE also to pclk1, pclk2 and byte1.
> 2. Add Fixes tag and cc-stable
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>

-- 
With best wishes
Dmitry