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Subject: Re: [PATCH] rtw88: coex: Fix ACL Tx pause during BT inquiry/page.
From:   Kalle Valo <kvalo@codeaurora.org>
In-Reply-To: <20200715023324.8600-1-yhchuang@realtek.com>
References: <20200715023324.8600-1-yhchuang@realtek.com>
To:     <yhchuang@realtek.com>
Cc:     <linux-wireless@vger.kernel.org>, <briannorris@chromium.org>
User-Agent: pwcli/0.1.0-git (https://github.com/kvalo/pwcli/) Python/3.5.2
Message-Id: <20200715091425.714A0C433CB@smtp.codeaurora.org>
Date:   Wed, 15 Jul 2020 09:14:25 +0000 (UTC)
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<yhchuang@realtek.com> wrote:

> From: Zong-Zhe Yang <kevin_yang@realtek.com>
> 
> Add a set of logic with corresponding coexistence parameters to
> handle the situation under BT inquiry/page.
> 
> We will set PSTDMA while WL-Busy + BT inquiry/page to separate
> WL/BT slots. PSTDMA can protect WL data rate and BT performance.
> 
> If WL-Busy + BT inquiry/page and there was BT device paired,
> We will set the mechanism to 4Slot PSTDMA.
> In 4Slot PSTDMA, the paired devices can perform more smoothly
> and prevent some issues trigger from insufficient data.
> 
> And to avoid A2DP glitch or disconnection, we will adjust ACL
> data priority higher than inquiry/page.
> 
> In addition, we found sometimes BT inquiry/page still working
> last for seconds after BT had notified inquiry/page finished.
> It will lead to A2DP glitch cause of ACL data, inquiry/page
> priority toggled. To fix the corner, we add a timer to remain
> the inquiry/page status.
> 
> And we found WL busy/idle threshold is too sensitive,
> it will keep switching in some weak network environment and
> coexistence mechanism will switch between TDMA and PSTDMA.
> 
> The very frequently switching may destroyed not only the
> handshake with AP, but BT performance. And it will trigger
> some unexpected error.
> 
> To prevent the frequently switching, we add a timer to delay
> the status change while WL busy switch to idle.
> 
> Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
> Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>

Patch applied to wireless-drivers-next.git, thanks.

001a3c902f6f rtw88: coex: Fix ACL Tx pause during BT inquiry/page.

-- 
https://patchwork.kernel.org/patch/11664065/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches