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From: rojay@codeaurora.org
To: Greg KH <gregkh@linuxfoundation.org>
Cc: agross@kernel.org, bjorn.andersson@linaro.org, mka@chromium.org,
	robh+dt@kernel.org, linux-serial@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Rajendra Nayak <rnayak@codeaurora.org>,
	akashast@codeaurora.org, msavaliy@qti.qualcomm.com
Subject: Re: [PATCH V3 1/2] soc: qcom-geni-se: Cleanup the code to remove proxy votes
Date: Wed, 24 Mar 2021 15:42:46 +0530	[thread overview]
Message-ID: <f61210c135fdaa742cc4abdfcdebd8ab@codeaurora.org> (raw)
In-Reply-To: <YFm1Qvo3SuwJOino@kroah.com>

On 2021-03-23 15:00, Greg KH wrote:
> On Mon, Mar 22, 2021 at 04:34:28PM +0530, Roja Rani Yarubandi wrote:
>> This reverts commit 048eb908a1f2 ("soc: qcom-geni-se: Add interconnect
>> support to fix earlycon crash")
>> 
>> ICC core and platforms drivers supports sync_state feature with
>> commit 7d3b0b0d8184 ("interconnect: qcom: Use icc_sync_state") which
>> ensures that the default ICC BW votes from the bootloader is not
>> removed until all it's consumers are probes.
>> 
>> The proxy votes were needed in case other QUP child drivers
>> I2C, SPI probes before UART, they can turn off the QUP-CORE clock
>> which is shared resources for all QUP driver, this causes unclocked
>> access to HW from earlycon.
>> 
>> Given above support from ICC there is no longer need to maintain
>> proxy votes on QUP-CORE ICC node from QUP wrapper driver for early
>> console usecase, the default votes won't be removed until real
>> console is probed.
>> 
>> Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org>
>> Signed-off-by: Akash Asthana <akashast@codeaurora.org>
>> Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
> 
> Should this have a "Fixes:" tag, and also be cc: stable@vger.kernel.org
> so that it will be properly backported?
> 
> If so, please add and resend.
> 

Okay, will add and resend.

> thanks,
> 
> greg k-h

  reply	other threads:[~2021-03-24 10:13 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-22 11:04 [PATCH V3 0/2] Separate out earlycon Roja Rani Yarubandi
2021-03-22 11:04 ` [PATCH V3 1/2] soc: qcom-geni-se: Cleanup the code to remove proxy votes Roja Rani Yarubandi
2021-03-23  9:30   ` Greg KH
2021-03-24 10:12     ` rojay [this message]
2021-03-22 11:04 ` [PATCH V3 2/2] arm64: dts: qcom: sc7180: Remove QUP-CORE ICC path Roja Rani Yarubandi

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