From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Mathias Nyman <mathias.nyman@intel.com>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
<linux-usb@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, Ikjoon Jang <ikjn@chromium.org>,
Eddie Hung <eddie.hung@mediatek.com>,
Sergei Shtylyov <sergei.shtylyov@gmail.com>
Subject: [PATCH v3 4/4] usb: xhci-mtk: use first-fit for LS/FS
Date: Fri, 7 May 2021 10:11:27 +0800 [thread overview]
Message-ID: <20210507021127.54717-4-chunfeng.yun@mediatek.com> (raw)
In-Reply-To: <20210507021127.54717-1-chunfeng.yun@mediatek.com>
Use first-fit instead of best-fit for LS/FS devices under TT,
we found that best-fit will consume more bandwidth for some
cases.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v3: no changes
---
drivers/usb/host/xhci-mtk-sch.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c
index 9fb75085e40f..c07411d9b16f 100644
--- a/drivers/usb/host/xhci-mtk-sch.c
+++ b/drivers/usb/host/xhci-mtk-sch.c
@@ -634,6 +634,11 @@ static int check_sch_bw(struct mu3h_sch_bw_info *sch_bw,
min_bw = worst_bw;
min_index = offset;
}
+
+ /* use first-fit for LS/FS */
+ if (sch_ep->sch_tt && min_index >= 0)
+ break;
+
if (min_bw == 0)
break;
}
--
2.18.0
next prev parent reply other threads:[~2021-05-07 2:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-07 2:11 [PATCH v3 1/4] usb: xhci-mtk: use bitfield instead of bool Chunfeng Yun
2021-05-07 2:11 ` [PATCH v3 2/4] usb: xhci-mtk: remove unnecessary setting of has_ippc Chunfeng Yun
2021-06-10 3:32 ` Ikjoon Jang
2021-05-07 2:11 ` [PATCH v3 3/4] usb: xhci-mtk: remove unnecessary assignments in periodic TT scheduler Chunfeng Yun
2021-05-07 2:11 ` Chunfeng Yun [this message]
2021-06-10 3:40 ` [PATCH v3 4/4] usb: xhci-mtk: use first-fit for LS/FS Ikjoon Jang
2021-06-10 3:31 ` [PATCH v3 1/4] usb: xhci-mtk: use bitfield instead of bool Ikjoon Jang
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