linux-kernel - Re: [PATCH v3 0/3] Polling for MHI ready

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Date:   Wed, 24 Feb 2021 14:57:29 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Bhaumik Bhatt <bbhatt@...eaurora.org>
Cc:     linux-arm-msm@...r.kernel.org, hemantk@...eaurora.org,
        jhugo@...eaurora.org, linux-kernel@...r.kernel.org,
        loic.poulain@...aro.org, carl.yin@...ctel.com,
        naveen.kumar@...ctel.com
Subject: Re: [PATCH v3 0/3] Polling for MHI ready

On Tue, Feb 23, 2021 at 07:44:27PM -0800, Bhaumik Bhatt wrote:
> v3:
> -Removed config changes that crept in in the first patch
> 
> v2:
> -Addressed review comments
> -Introduce new patch for to use controller defined read_reg() for polling
> -Add usage in RDDM download panic path as well
> 
> Use polling instead of interrupt driven approach to wait for MHI ready state.
> 
> In certain devices, it is likely that there is no incoming MHI
> interrupt for a transition to MHI READY state. One such example
> is the move from Pass Through to an SBL or AMSS execution
> environment. In order to facilitate faster bootup times as there
> is no need to wait until timeout_ms completes, MHI host can poll
> every 25 milliseconds to check if device has entered MHI READY
> until a maximum timeout of twice the timeout_ms is reached.
> 
> This patch series has been tested on an arm64 device.
> 

So this is a spinoff from "Execution environment updates from MHI"?
Please mention it in the cover letter and which one is the latest.

Thanks,
Mani

> Bhaumik Bhatt (3):
>   bus: mhi: core: Introduce internal register poll helper function
>   bus: mhi: core: Move to polling method to wait for MHI ready
>   bus: mhi: core: Use poll register read API for RDDM download
> 
>  drivers/bus/mhi/core/boot.c     | 20 ++++++--------------
>  drivers/bus/mhi/core/internal.h |  3 +++
>  drivers/bus/mhi/core/main.c     | 23 +++++++++++++++++++++++
>  drivers/bus/mhi/core/pm.c       | 31 ++++++++++++++-----------------
>  4 files changed, 46 insertions(+), 31 deletions(-)
> 
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>