linux-kernel - Re: [PATCH v6 0/9] soundwire: qcom: various improvements

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Date:   Tue, 30 Mar 2021 22:55:33 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     yung-chuan.liao@...ux.intel.com,
        pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        robh@...nel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v6 0/9] soundwire: qcom: various improvements

On 30-03-21, 15:47, Srinivas Kandagatla wrote:
> Thanks for reviewing v5 of this patchset!
> 
> During testing SoundWire controller on SM8250 MTP, we found
> few issues like all the interrupts are not handled,
> all transport parameters are not read from device tree.
> Patch to add Auto Enumeration supported by the controller
> is also part of this series.
> 
> Other major issue was register read/writes which was interrupt based
> was an overhead and puts lot of limitation on context it can be used from.
> 
> With previous approach number of interrupts generated
> after enumeration are around 130:
> $ cat /proc/interrupts  | grep soundwire
> 21: 130 0 0 0 0 0 0 0 GICv3 234 Edge      soundwire
>     
> after this patch they are just 3 interrupts
> $ cat /proc/interrupts  | grep soundwire
> 21: 3 0 0 0 0 0 0 0 GICv3 234 Edge      soundwire
> 
> So this patchset add various improvements to the existing driver
> to address above issues.
> 
> Tested it on SM8250 MTP with 2x WSA881x speakers, HeadPhones on
> WCD938x via lpass-rx-macro and Analog MICs via lpass-tx-macro.
> Also tested on DragonBoard DB845c with 2xWSA881x speakers.

Applied, thanks

-- 
~Vinod