linux-kernel - Re: [PATCH] clk: qcom: videocc-sm8350: use HW_CTRL

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Message-ID: <Zw9txV7gmWE5D8BE@hovoldconsulting.com>
Date: Wed, 16 Oct 2024 09:39:49 +0200
From: Johan Hovold <johan@...nel.org>
To: Bjorn Andersson <andersson@...nel.org>
Cc: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Ulf Hansson <ulf.hansson@...aro.org>, linux-arm-msm@...r.kernel.org,
	linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jagadeesh Kona <quic_jkona@...cinc.com>,
	Taniya Das <quic_tdas@...cinc.com>,
	Abel Vesa <abel.vesa@...aro.org>,
	Konrad Dybcio <konradybcio@...nel.org>
Subject: Re: [PATCH] clk: qcom: videocc-sm8350: use HW_CTRL_TRIGGER for
 vcodec GDSCs

On Sun, Sep 01, 2024 at 11:30:24AM +0200, Johan Hovold wrote:
> A recent change in the venus driver results in a stuck clock on the
> Lenovo ThinkPad X13s, for example, when streaming video in firefox:
> 
> 	video_cc_mvs0_clk status stuck at 'off'
> 	WARNING: CPU: 6 PID: 2885 at drivers/clk/qcom/clk-branch.c:87 clk_branch_wait+0x144/0x15c
> 	...
> 	Call trace:
> 	 clk_branch_wait+0x144/0x15c
> 	 clk_branch2_enable+0x30/0x40
> 	 clk_core_enable+0xd8/0x29c
> 	 clk_enable+0x2c/0x4c
> 	 vcodec_clks_enable.isra.0+0x94/0xd8 [venus_core]
> 	 coreid_power_v4+0x464/0x628 [venus_core]
> 	 vdec_start_streaming+0xc4/0x510 [venus_dec]
> 	 vb2_start_streaming+0x6c/0x180 [videobuf2_common]
> 	 vb2_core_streamon+0x120/0x1dc [videobuf2_common]
> 	 vb2_streamon+0x1c/0x6c [videobuf2_v4l2]
> 	 v4l2_m2m_ioctl_streamon+0x30/0x80 [v4l2_mem2mem]
> 	 v4l_streamon+0x24/0x30 [videodev]
> 
> using the out-of-tree sm8350/sc8280xp venus support. [1]
> 
> Update also the sm8350/sc8280xp GDSC definitions so that the hw control
> mode can be changed at runtime as the venus driver now requires.
> 
> Fixes: ec9a652e5149 ("venus: pm_helpers: Use dev_pm_genpd_set_hwmode to switch GDSC mode on V6")
> Link: https://lore.kernel.org/lkml/20230731-topic-8280_venus-v1-0-8c8bbe1983a5@linaro.org/ # [1]
> Cc: Jagadeesh Kona <quic_jkona@...cinc.com>
> Cc: Taniya Das <quic_tdas@...cinc.com>
> Cc: Abel Vesa <abel.vesa@...aro.org>
> Cc: Konrad Dybcio <konradybcio@...nel.org>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

This one did not make it into 6.11 and should now be backported as well:

Cc: stable@...r.kernel.org	# 6.11

Bjorn, can you pick it up for 6.12-rc?

Johan