linux-kernel - Re: [PATCH 1/2] usb: xhci-mtk: add a bandwidth budget table

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Message-ID: <712ab5f3-eb61-f7e5-fc67-c6c175beaac0@collabora.com>
Date:   Thu, 14 Sep 2023 12:14:03 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        linux-usb@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] usb: xhci-mtk: add a bandwidth budget table

Il 30/08/23 14:28, Chunfeng Yun ha scritto:
> In order to estimate when fs/ls transactions appear on a downstream bus,
> the host must calculate a best case full-speed budget, use a table to
> track how many bytes occure in each microframe.
> This patch is prepared for introducing an improved bandwidth scheduling.
> 

Hello Chunfeng,

it would be helpful if you add a cover letter with some test results for
the BW improvements that you're seeing here.

Thanks,
Angelo

> Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> ---
>   drivers/usb/host/xhci-mtk-sch.c | 113 +++++++++++++++++++++++---------
>   drivers/usb/host/xhci-mtk.h     |   4 +-
>   2 files changed, 85 insertions(+), 32 deletions(-)
>