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Message-ID: <d441fbdebcf2576bd08b2ad032b4bc4d184fdccc.camel@mediatek.com>
Subject: Re: [PATCH] mt76: mt7921: fix aggregation subframes setting to HE
 max
From:   Deren Wu <deren.wu@mediatek.com>
To:     Felix Fietkau <nbd@nbd.name>, Lorenzo Bianconi <lorenzo@kernel.org>
CC:     Sean Wang <sean.wang@mediatek.com>,
        Soul Huang <Soul.Huang@mediatek.com>,
        YN Chen <YN.Chen@mediatek.com>,
        Leon Yen <Leon.Yen@mediatek.com>,
        "Eric-SY Chang" <Eric-SY.Chang@mediatek.com>,
        KM Lin <km.lin@mediatek.com>,
        Robin Chiu <robin.chiu@mediatek.com>,
        CH Yeh <ch.yeh@mediatek.com>, Posh Sun <posh.sun@mediatek.com>,
        Eric Liang <Eric.Liang@mediatek.com>,
        Stella Chang <Stella.Chang@mediatek.com>,
        Evelyn Tsai <evelyn.tsai@mediatek.com>,
        "Ryder Lee" <ryder.lee@mediatek.com>,
        Shayne Chen <shayne.chen@mediatek.com>,
        linux-wireless <linux-wireless@vger.kernel.org>,
        linux-mediatek <linux-mediatek@lists.infradead.org>
Date:   Fri, 17 Jun 2022 17:29:52 +0800
In-Reply-To: <b7e3006a-03a9-fad6-3f57-10aed678f211@nbd.name>
References: <7f5145276d732cb4aebcbffd6fc4a5eb852dd3be.1655393246.git.deren.wu@mediatek.com>
         <b7e3006a-03a9-fad6-3f57-10aed678f211@nbd.name>
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Hi Felix,

On Fri, 2022-06-17 at 10:39 +0200, Felix Fietkau wrote:
> On 16.06.22 17:57, Deren Wu wrote:
> > From: Deren Wu <deren.wu@mediatek.com>
> > 
> > mt7921/mt7922 support HE max aggregation subframes 256 for both
> > tx/rx.
> > Get better throughput then before.
> > 
> > Fixes: 94bb18b03d43 ("mt76: mt7921: fix max aggregation subframes
> > setting")
> > Tested-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
> > Reviewed-by: Sean Wang <sean.wang@mediatek.com>
> > Signed-off-by: Deren Wu <deren.wu@mediatek.com>
> 
> When I made the change that you're reverting here, I used the values 
> from the reference SDK that I got, and the change actually seemed to 
> improve performance in my tests.
> Did something change in the firmware, or is there a related chipset 
> difference between 7921 and 7922?
> 
> - Felix
> 


Yes, there was some fw changes ready in 2021 and the SDK was updated as
well. After some performance re-check, the test result is much better
with the new patch. We think the max-size-256 can be applied in
mt7921/mt7922 driver now. 

PS: mt7921/mt7922 are the same. Both of them can support this size.

Thanks,
Deren