From: Johan Hovold <johan@kernel.org>
To: Ikjoon Jang <ikjn@chromium.org>
Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org,
GregKroah-Hartman <gregkh@linuxfoundation.org>,
RobHerring <robh+dt@kernel.org>,
MarkRutland <mark.rutland@arm.com>,
AlanStern <stern@rowland.harvard.edu>,
SuwanKim <suwan.kim027@gmail.com>,
"GustavoA . R . Silva" <gustavo@embeddedor.com>,
JohanHovold <johan@kernel.org>,
linux-kernel@vger.kernel.org, drinkcat@chromium.org
Subject: Re: [PATCH v4 0/2] usb: override hub device bInterval with device
Date: Tue, 3 Dec 2019 17:40:10 +0100 [thread overview]
Message-ID: <20191203164010.GG10631@localhost> (raw)
In-Reply-To: <20191203101521.198914-1-ikjn@chromium.org>
On Tue, Dec 03, 2019 at 06:15:21PM +0800, Ikjoon Jang wrote:
> This patchset enables hard wired hub device to use different bInterval
> from its descriptor when the hub has a combined device node.
>
> When we know reducing autosuspend delay for built-in HIDs is better for
> power saving, we can reduce it to the optimal value. But if a parent hub
> has a long bInterval, mouse lags a lot from more frequent autosuspend.
> So this enables overriding bInterval for a hard wired hub device only
> when we know that reduces the power consumption.
>
> Changes in v4
> - use of_property_read_u32() instead of of_property_read_u8()
What changed in the previous versions?
Johan
next prev parent reply other threads:[~2019-12-03 16:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-03 10:15 [PATCH v4 0/2] usb: override hub device bInterval with device Ikjoon Jang
2019-12-03 16:40 ` Johan Hovold [this message]
2019-12-04 2:46 ` Ikjoon Jang
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