From: Stephen Boyd <sboyd@kernel.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>,
Michael Turquette <mturquette@baylibre.com>,
Taniya Das <tdas@codeaurora.org>, Vinod Koul <vkoul@kernel.org>
Cc: Robert Foss <robert.foss@linaro.org>,
linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] clk: qcom: clk-alpha-pll: Don't reconfigure running Trion
Date: Thu, 02 Dec 2021 16:59:27 -0800 [thread overview]
Message-ID: <20211203005928.52BEDC00446@smtp.kernel.org> (raw)
In-Reply-To: <20211123162508.153711-1-bjorn.andersson@linaro.org>
Quoting Bjorn Andersson (2021-11-23 08:25:08)
> In the event that the bootloader has configured the Trion PLL as source
> for the display clocks, e.g. for the continuous splashscreen, then there
> will also be RCGs that are clocked by this instance.
>
> Reconfiguring, and in particular disabling the output of, the PLL will
> cause issues for these downstream RCGs and has been shown to prevent
> them from being re-parented.
>
> Follow downstream and skip configuration if it's determined that the PLL
> is already running.
>
> Fixes: 59128c20a6a9 ("clk: qcom: clk-alpha-pll: Add support for controlling Lucid PLLs")
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
Applied to clk-fixes
next prev parent reply other threads:[~2021-12-03 0:59 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-23 16:16 [PATCH] clk: qcom: clk-alpha-pll: Don't reconfigure running Trion Bjorn Andersson
2021-11-23 16:25 ` [PATCH v2] " Bjorn Andersson
2021-11-23 17:02 ` Robert Foss
2021-11-24 4:23 ` Vinod Koul
2021-12-03 0:59 ` Stephen Boyd [this message]
2021-11-24 1:45 ` [PATCH] " kernel test robot
2021-11-24 1:45 ` kernel test robot
2021-11-24 10:46 ` kernel test robot
2021-11-24 10:46 ` kernel test robot
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