Re: [PATCH] clk: mediatek: mt8183: Only enable runtime PM on mt8183-mfgcfg

[Stephen Boyd <sboyd@kernel.org>]

Quoting Pin-yen Lin (2024-06-13 05:02:28)
> Commit 2f7b1d8b5505 ("clk: mediatek: Do a runtime PM get on controllers
> during probe") enabled runtime PM for all mediatek clock controllers,
> but this introduced an issue on the resume path.
> 
> If a device resumes earlier than the clock controller and calls
> clk_prepare() when runtime PM is enabled on the controller, it will end
> up calling clk_pm_runtime_get(). But the subsequent
> pm_runtime_resume_and_get() call will fail because the runtime PM is
> temporarily disabled during suspend.
> 
> To workaround this, introduce a need_runtime_pm flag and only enable it
> on mt8183-mfgcfg, which is the driver that observed deadlock previously.
> Hopefully mt8183-cfgcfg won't run into the issue at the resume stage
> because the GPU should have stopped rendering before the system calls
> suspend.
> 
> Fixes: 2f7b1d8b5505 ("clk: mediatek: Do a runtime PM get on controllers during probe")
> Signed-off-by: Pin-yen Lin <treapking@chromium.org>
> 
> ---

Applied to clk-fixes