From patchwork Wed Dec 27 06:03:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Q2h1bmZlbmcgWXVuICjkupHmmKXls7Ap?= X-Patchwork-Id: 13505145 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CC02363AA; Wed, 27 Dec 2023 06:03:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="NcxIVVNS" X-UUID: a24991aca47d11ee9e680517dc993faa-20231227 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=NGljdjksTJl7cSSu9XYy7FO8kYtRZge6sNRdb6feXL4=; b=NcxIVVNS0IdJpB5IsuQktbnvfJasN0mYmtFKHPu1rBiCeDvV3SiZytfUSH5h1xgy9sEI/DdeJPzUSwFLoqeYDjmGLqSiV383PR+fR6aXS6HSJEANYRpZIGDXQsCdGu7Z1ZH+3EU7/i3F4f3o/kLEht5lz+X2d0SIUsg1WelQyIg=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.35,REQID:59444eab-01a9-4c50-a5d2-b27ae2a07c76,IP:0,U RL:0,TC:0,Content:0,EDM:-30,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-30 X-CID-META: VersionHash:5d391d7,CLOUDID:e2489d8d-e2c0-40b0-a8fe-7c7e47299109,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:2,IP:nil,UR L:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:N O,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_ULN X-UUID: a24991aca47d11ee9e680517dc993faa-20231227 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 171561098; Wed, 27 Dec 2023 14:03:19 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 27 Dec 2023 14:03:17 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Wed, 27 Dec 2023 14:03:17 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman , Rob Herring , Krzysztof Kozlowski , AngeloGioacchino Del Regno CC: Chunfeng Yun , Conor Dooley , Matthias Brugger , "Mathias Nyman" , , , , , , Eddie Hung , Macpaul Lin Subject: [PATCH v4 1/3] dt-bindings: usb: mtk-xhci: add a property for Gen1 isoc-in transfer issue Date: Wed, 27 Dec 2023 14:03:14 +0800 Message-ID: <20231227060316.8539-1-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--6.698500-8.000000 X-TMASE-MatchedRID: G4NbPPbBCbo28LK855iUisp9Bgr5ONKhXxT5cg8K/td+YesuCgkiXKLs GdYIe0oEWB8Rur00SOpx/Hv6BudnAqB/4ZSHyd2lsyNb+yeIRApRnscLnNAC7BjQD3m2MCf7FWo Asts4LpWPqQJ9fQR1ziV2YP+J+E56aACC67qZQKpsG7r4Qh7N3DNzwULQwTBPVzOmd/bB9b6uoc zUog5jKJR0/TJZAy/xoJY+2TrDFLUdpD3DKTh+QJ4CIKY/Hg3AGdQnQSTrKGPEQdG7H66TyH4gK q42LRYkmKjeD7ZgQXRJ1fYQaQSqLhehi1q7el9sGHUWvrwT/1d+3BndfXUhXQ== X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--6.698500-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 9363BDB1CBB7952FF72435AEDE0989D1A860F3E2E01C0BACAFCA187C3CADDD0C2000:8 X-MTK: N For Gen1 isoc-in endpoint on controller before about SSUSB IPM v1.6.0, it still send out unexpected ACK after receiving a short packet in burst transfer, this will cause an exception on connected device, specially for a 4k camera. Add a quirk property "rx-fifo-depth" to work around this hardware issue, prefer to use 3k bytes; The side-effect is that may cause performance drop about 10%, including bulk transfer. Signed-off-by: Chunfeng Yun Reviewed-by: AngeloGioacchino Del Regno Acked-by: Krzysztof Kozlowski --- v4: change rx-fifo size in bytes v3: add fifo depth unit, change the value range from 0-3 to 1-4 v2: change 'mediatek,rxfifo-depth' to 'rx-fifo-depth' --- .../devicetree/bindings/usb/mediatek,mtk-xhci.yaml | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml index e9644e333d78..9f621f2209df 100644 --- a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml +++ b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml @@ -124,6 +124,17 @@ properties: defined in the xHCI spec on MTK's controller. default: 5000 + rx-fifo-depth: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + It is a quirk used to work around Gen1 isoc-in endpoint transfer issue + that still send out unexpected ACK after device finish the burst transfer + with a short packet and cause an exception, specially on a 4K camera + device, it happens on controller before about IPM v1.6.0; the side-effect + is that may cause performance drop about 10%, include bulk transfer, + prefer to use 3k here. The size is in bytes. + enum: [1024, 2048, 3072, 4096] + # the following properties are only used for case 1 wakeup-source: description: enable USB remote wakeup, see power/wakeup-source.txt