linux-kernel - Re: [PATCH v3 1/1] clk: sunxi-ng: h616: Reparent GPU clock during frequency changes

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Message-Id: <174033020559.3257225.10440748576870743856.b4-ty@csie.org>
Date: Mon, 24 Feb 2025 01:03:25 +0800
From: Chen-Yu Tsai <wens@...e.org>
To: Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Samuel Holland <samuel@...lland.org>, linux-clk@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev, 
 linux-kernel@...r.kernel.org, Philippe Simons <simons.philippe@...il.com>
Cc: Andre Przywara <andre.przywara@....com>
Subject: Re: [PATCH v3 1/1] clk: sunxi-ng: h616: Reparent GPU clock during
 frequency changes

On Thu, 20 Feb 2025 12:38:08 +0100, Philippe Simons wrote:
> The H616 manual does not state that the GPU PLL supports
> dynamic frequency configuration, so we must take extra care when changing
> the frequency. Currently any attempt to do device DVFS on the GPU lead
> to panfrost various ooops, and GPU hangs.
> 
> The manual describes the algorithm for changing the PLL
> frequency, which the CPU PLL notifier code already support, so we reuse
> that to reparent the GPU clock to GPU1 clock during frequency
> changes.
> 
> [...]

Applied to clk-for-6.15 in git@...hub.com:linux-sunxi/linux-sunxi.git, thanks!

[1/1] clk: sunxi-ng: h616: Reparent GPU clock during frequency changes
      commit: eb963d7948ce6571939c6875424b557b25f16610

Best regards,
-- 
Chen-Yu Tsai <wens@...e.org>