linux-kernel - Re: (subset) [Patch v2 0/2] Fix hang due to CPU BW request as BPMP suspended

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Message-ID: <169719989291.3880029.32092032379655248.b4-ty@nvidia.com>
Date:   Fri, 13 Oct 2023 14:25:12 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     jonathanh@...dia.com, krzysztof.kozlowski@...aro.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sumit Gupta <sumitg@...dia.com>
Cc:     bbasu@...dia.com
Subject: Re: (subset) [Patch v2 0/2] Fix hang due to CPU BW request as BPMP suspended

From: Thierry Reding <treding@...dia.com>


On Mon, 09 Oct 2023 15:35:55 +0530, Sumit Gupta wrote:
> This patch set fixes hang during system resume which started coming
> after adding Memory Interconnect and OPP support to the Tegra194 CPUFREQ
> in below change:
>  f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth").
> 
> Tegra194 CPUFREQ driver uses 'CPUFREQ_NEED_INITIAL_FREQ_CHECK' flag
> which causes a CPU frequency set request from the 'cpuhp_cpufreq_online'
> hotplug notifier during resume. The CPU frequency set call also triggers
> a DRAM bandwidth set request but the BPMP driver hasn't resumed yet
> which results in hang during resume.
> 
> [...]

Applied, thanks!

[2/2] memory: tegra: set BPMP msg flags to reset IPC channels
      (no commit info)

Best regards,
-- 
Thierry Reding <treding@...dia.com>