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Sun, 06 Sep 2026 01:20:18 -0700 (PDT) From: Mehmet Fide To: Ping-Ke Shih Cc: Bitterblue Smith , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Mehmet Fide Subject: Re: [PATCH rtw-next v3] wifi: rtw88: usb: route bmc frames via the high queue only for DTIM delivery Date: Sun, 6 Sep 2026 10:20:17 +0200 Message-ID: <20260906082017.909554-1-mehmet.fide@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <070f9724ca4a42a0b64bbf63724d8cdc@realtek.com> References: <070f9724ca4a42a0b64bbf63724d8cdc@realtek.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi Ping-Ke, > FYI. I checked vendor driver. Normally REG_ATIMWND sets 0xa or 0xc in AP mode > for chips. Thanks, that matches what I measured: 0x04 already drained the storm, so 0xa leaves comfortable headroom. If you agree I will add a small third patch to the series that programs REG_ATIMWND to 0xa when the interface goes into AP mode, as a complement to the bound and the filter (each covers a different failure mode: the window adds drain capacity, the bound protects the pool if the window is not enough, the filter keeps the ordinary chatter off the beacon-paced path altogether). > As you saw it is for TDLS channel switching (timeslot sharing), I > don't think it can work in AP mode... > I will ask USB experts internally to see if there is an interrupt > to notify driver about TBTT (or beacon early). Understood, and thank you for asking. If such a notification exists I would be glad to prototype IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING on top of it as the long-term solution; the bound and filter series does not depend on it. Mehmet