From: Felipe Balbi <balbi@kernel.org>
To: Roger Quadros <rogerq@ti.com>
Cc: nsekhar@ti.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] usb: dwc3: gadget: Fix ISO transfer performance
Date: Wed, 17 May 2017 10:48:44 +0300 [thread overview]
Message-ID: <87fug3x6sj.fsf@linux.intel.com> (raw)
In-Reply-To: <0b5968b0-0451-b892-4798-4df33e2aac33@ti.com>
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Hi,
Roger Quadros <rogerq@ti.com> writes:
> On 21/04/17 15:58, Roger Quadros wrote:
>> Commit 08a36b543803 ("usb: dwc3: gadget: simplify __dwc3_gadget_ep_queue()")
>> caused a small change in the way ISO transfer is handled in the case
>> when XferInProgress event happens on Isoc EP with an active transfer.
>> This caused a performance degradation of 50%. e.g. using g_webcam on DUT
>> and luvcview on host the video frame rate dropped from 16fps to 8fps
>> @high-speed.
>>
>> Make the ISO transfer handling equivalent to that prior to that commit
>> to get back the original ISO performance numbers.
>>
>> Fixes: 08a36b543803 ("usb: dwc3: gadget: simplify __dwc3_gadget_ep_queue()")
>> Signed-off-by: Roger Quadros <rogerq@ti.com>
>
> Any comments?
pull request coming shortly ;-)
--
balbi
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prev parent reply other threads:[~2017-05-17 7:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-21 12:58 [PATCH] usb: dwc3: gadget: Fix ISO transfer performance Roger Quadros
2017-05-17 7:44 ` Roger Quadros
2017-05-17 7:48 ` Felipe Balbi [this message]
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