From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from gloria.sntech.de (gloria.sntech.de [185.11.138.130]) (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 693373BBFCB; Mon, 10 Aug 2026 11:49:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.11.138.130 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786362600; cv=none; b=C4QcF6Ztst2JP6K/NY7qeeQ0Tc4WS47jHzeNIRyiwTUDtNStFSO/ibOCnKD/Cb59+xc3n0pJQCyEMsUCtzqvyx/1MW1AOd7//w4FXL21ajJ6oJSWQ0VeJUycIpnq1Ng0ZyBLY5UzGp3gL0wTLLrEMzROg3qLSopwC1kUrnTsAFU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786362600; c=relaxed/simple; bh=a1vAUQ0oZCfDv+F/ZsykLBoNNtP/kUxc5PYwf7YQeDU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=CrzQgDNADX2epmpPPd/qfzPK8KrliqAqys3DFDOKSUU2J6Qe2G6cKHstzTvifprzdCSAMItcq2z7zP926QN5NLlQuIuN7SJIMCNi38vJajshrf5GkroA55N5yEIlPlygoFeBAsXbg3wZrQtaALoLNLAGiJ+vl4/mlnBTz8AWMnU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=sntech.de; spf=pass smtp.mailfrom=sntech.de; dkim=pass (2048-bit key) header.d=sntech.de header.i=@sntech.de header.b=VlgLFv1H; arc=none smtp.client-ip=185.11.138.130 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=sntech.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sntech.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sntech.de header.i=@sntech.de header.b="VlgLFv1H" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sntech.de; s=gloria202408; h=Content-Type:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Reply-To; bh=hLx85hewkyxE/kVi+opsqCCSjOrk34BsgxZUq/J+Tec=; b=VlgLFv1HJy9KpUpxtx8HVTdDQh EzLNQ5HB1410XGH7tieiL7/zobeis5a3IW2J/s8nIbc6cjM+lsArleju+u4udEJifH1z6Q36fvMhq QijgSXgKg08oNOnUD+XFLMCqeHfYrlfoHENbhglgTwK8u4v+Dym2hHUl2P0V4j2411odIODAlAj7A f4CdduXpzfdrXZXT9YlhQU8XVBBS7eun6VNc6sfu1/ql1qjzjkrO92O0hbB8Cv/wz3p54MXDuRjVo eu9wqFGx8ktUEsDB/BS1CxgpAmN51sordisHJRU+0EPLr8KPIF+dkGmAvMgFuX/zW7X1fvDjDiUn2 3DTxeT2A==; From: Heiko =?UTF-8?B?U3TDvGJuZXI=?= To: Sandy Huang , Andy Yan , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Rob Herring , Krzysztof Kozlowski , Conor Dooley , David Airlie , Simona Vetter , Dmitry Baryshkov , Luca Ceresoli , Philipp Zabel , Sebastian Reichel Cc: Cristian Ciocaltea , Damon Ding , Dmitry Baryshkov , Alexey Charkov , dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, kernel@collabora.com, linux-arm-kernel@lists.infradead.org, Sebastian Reichel , Sashiko , Krzysztof Kozlowski Subject: Re: [PATCH v11 00/21] Synopsys DisplayPort Controller improvements for Rockchip platforms Date: Mon, 10 Aug 2026 13:48:58 +0200 Message-ID: <20767137.geO5KgaWL5@diego> In-Reply-To: <20260806-synopsys-dw-dp-improvements-v11-0-0d508505f383@collabora.com> References: <20260806-synopsys-dw-dp-improvements-v11-0-0d508505f383@collabora.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Hi Sebastian, Am Donnerstag, 6. August 2026, 19:02:06 Mitteleurop=C3=A4ische Sommerzeit s= chrieb Sebastian Reichel: > This patch series updates the Synopsys Designware DisplayPort bridge > together with the only existing user: The Rockchip RK3576/RK3588: >=20 > 1. Follow-up bridges (PHY, USB-C connector) > This is needed to get USB-C DP AltMode working; I've followed > the Qualcomm driver as reference >=20 > 2. Runtime PM > The initial driver has been upstreamed without RPM; add it to > avoid wasting power when nothing is plugged >=20 > 3. Audio > The initial driver has been upstreamed without audio support; > this adds all missing bits for audio with single stream transport >=20 > To properly make use of the bridge code the following USBDP PHY series > is also needed: >=20 > https://lore.kernel.org/all/20260714-rockchip-usbdp-cleanup-v13-0-6cb3e76= 9d4c5@collabora.com/ I've now had time to test both series (dw-dp + usbdp) :-) =2D On my 1080p display I get nice output =2D On my 4K display I get "some" output after increasing the ACLK_VOP to 750MHz - although the output itself is garbled. Before there was no output at all =2D hotplug works correctly, typec-display altmode gets correctly set up and the drm driver enables output [0] =2D cable being plugged in on boot does not work completely. The usb-side gets detected correctly, but the drm-side stays at disconnected The usb+typec-related kernel messages look the same though. [1] Unplugging and replugging then produces display output. Heiko [0] [ 221.536599] platform xhci-hcd.4.auto: bus: 'platform': __driver_probe_de= vice: matched device with driver xhci-hcd [ 221.548102] platform xhci-hcd.4.auto: bus: 'platform': really_probe: pro= bing driver xhci-hcd with device [ 221.558836] xhci-hcd xhci-hcd.4.auto: xHCI Host Controller [ 221.564990] xhci-hcd xhci-hcd.4.auto: new USB bus registered, assigned b= us number 5 [ 221.573652] xhci-hcd xhci-hcd.4.auto: hcc params 0x0220fe64 hci version = 0x110 quirks 0x0000808002000010 [ 221.584184] xhci-hcd xhci-hcd.4.auto: irq 108, io mem 0xfc000000 [ 221.591002] xhci-hcd xhci-hcd.4.auto: xHCI Host Controller [ 221.597149] xhci-hcd xhci-hcd.4.auto: new USB bus registered, assigned b= us number 6 [ 221.605724] xhci-hcd xhci-hcd.4.auto: Host supports USB 3.0 SuperSpeed [ 221.613368] usb usb5: bus: 'usb': __driver_probe_device: matched device = with driver usb [ 221.622335] usb usb5: bus: 'usb': really_probe: probing driver usb with = device [ 221.630503] usb 5-0:1.0: bus: 'usb': __driver_probe_device: matched devi= ce with driver hub [ 221.639776] usb 5-0:1.0: bus: 'usb': really_probe: probing driver hub wi= th device [ 221.648171] hub 5-0:1.0: USB hub found [ 221.652396] hub 5-0:1.0: 1 port detected [ 221.656891] hub 5-0:1.0: driver: 'hub': driver_bound: bound to device [ 221.664125] hub 5-0:1.0: bus: 'usb': really_probe: bound device to drive= r hub [ 221.672155] usb usb5: driver: 'usb': driver_bound: bound to device [ 221.679099] usb usb5: bus: 'usb': really_probe: bound device to driver u= sb [ 221.686864] usb usb6: We don't know the algorithms for LPM for this host= , disabling LPM. [ 221.696175] usb usb6: bus: 'usb': __driver_probe_device: matched device = with driver usb [ 221.705143] usb usb6: bus: 'usb': really_probe: probing driver usb with = device [ 221.713323] usb 6-0:1.0: bus: 'usb': __driver_probe_device: matched devi= ce with driver hub [ 221.722578] usb 6-0:1.0: bus: 'usb': really_probe: probing driver hub wi= th device [ 221.730961] hub 6-0:1.0: USB hub found [ 221.735170] hub 6-0:1.0: 1 port detected [ 221.739647] hub 6-0:1.0: driver: 'hub': driver_bound: bound to device [ 221.746889] hub 6-0:1.0: bus: 'usb': really_probe: bound device to drive= r hub [ 221.754920] usb usb6: driver: 'usb': driver_bound: bound to device [ 221.761867] usb usb6: bus: 'usb': really_probe: bound device to driver u= sb [ 221.769602] xhci-hcd xhci-hcd.4.auto: driver: 'xhci-hcd': driver_bound: = bound to device [ 221.778585] xhci-hcd xhci-hcd.4.auto: bus: 'platform': really_probe: bou= nd device to driver xhci-hcd [ 222.032051] typec port0-partner.0: bus: 'typec': __driver_probe_device: = matched device with driver typec_displayport [ 222.043845] typec port0-partner.0: bus: 'typec': really_probe: probing d= river typec_displayport with device [ 222.054819] typec_displayport port0-partner.0: driver: 'typec_displaypor= t': driver_bound: bound to device [ 222.065547] typec_displayport port0-partner.0: bus: 'typec': really_prob= e: bound device to driver typec_displayport [ 222.336513] usb 5-1: new full-speed USB device number 2 using xhci-hcd [ 222.493299] usb 5-1: not running at top speed; connect to a high speed h= ub [ 222.512188] usb 5-1: bus: 'usb': __driver_probe_device: matched device w= ith driver usb [ 222.521057] usb 5-1: bus: 'usb': really_probe: probing driver usb with d= evice [ 222.535340] usb 5-1: driver: 'usb': driver_bound: bound to device [ 222.542185] usb 5-1: bus: 'usb': really_probe: bound device to driver usb [ 224.327221] Console: switching to colour frame buffer device 240x67 [ 224.353443] rockchip-drm display-subsystem: [drm] fb0: rockchipdrmfb fra= me buffer device [1] ----------- [ 23.452524] platform xhci-hcd.4.auto: bus: 'platform': __driver_probe_de= vice: matched device with driver xhci-hcd [ 23.464004] platform xhci-hcd.4.auto: bus: 'platform': really_probe: pro= bing driver xhci-hcd with device [ 23.474654] xhci-hcd xhci-hcd.4.auto: xHCI Host Controller [ 23.480783] xhci-hcd xhci-hcd.4.auto: new USB bus registered, assigned b= us number 5 [ 23.489401] xhci-hcd xhci-hcd.4.auto: hcc params 0x0220fe64 hci version = 0x110 quirks 0x0000808002000010 [ 23.499910] xhci-hcd xhci-hcd.4.auto: irq 108, io mem 0xfc000000 [ 23.506671] xhci-hcd xhci-hcd.4.auto: xHCI Host Controller [ 23.512790] xhci-hcd xhci-hcd.4.auto: new USB bus registered, assigned b= us number 6 [ 23.521346] xhci-hcd xhci-hcd.4.auto: Host supports USB 3.0 SuperSpeed [ 23.528805] usb usb5: bus: 'usb': __driver_probe_device: matched device = with driver usb [ 23.537771] usb usb5: bus: 'usb': really_probe: probing driver usb with = device [ 23.545879] usb 5-0:1.0: bus: 'usb': __driver_probe_device: matched devi= ce with driver hub [ 23.555120] usb 5-0:1.0: bus: 'usb': really_probe: probing driver hub wi= th device [ 23.563486] hub 5-0:1.0: USB hub found [ 23.567675] hub 5-0:1.0: 1 port detected [ 23.572138] hub 5-0:1.0: driver: 'hub': driver_bound: bound to device [ 23.579343] hub 5-0:1.0: bus: 'usb': really_probe: bound device to drive= r hub [ 23.587327] usb usb5: driver: 'usb': driver_bound: bound to device [ 23.594240] usb usb5: bus: 'usb': really_probe: bound device to driver u= sb [ 23.601942] usb usb6: We don't know the algorithms for LPM for this host= , disabling LPM. [ 23.618552] usb usb6: bus: 'usb': __driver_probe_device: matched device = with driver usb [ 23.627501] usb usb6: bus: 'usb': really_probe: probing driver usb with = device [ 23.635604] usb 6-0:1.0: bus: 'usb': __driver_probe_device: matched devi= ce with driver hub [ 23.644841] usb 6-0:1.0: bus: 'usb': really_probe: probing driver hub wi= th device [ 23.653203] hub 6-0:1.0: USB hub found [ 23.657389] hub 6-0:1.0: 1 port detected [ 23.661798] hub 6-0:1.0: driver: 'hub': driver_bound: bound to device [ 23.668998] hub 6-0:1.0: bus: 'usb': really_probe: bound device to drive= r hub [ 23.676979] usb usb6: driver: 'usb': driver_bound: bound to device [ 23.683886] usb usb6: bus: 'usb': really_probe: bound device to driver u= sb [ 23.691574] xhci-hcd xhci-hcd.4.auto: driver: 'xhci-hcd': driver_bound: = bound to device [ 23.700524] xhci-hcd xhci-hcd.4.auto: bus: 'platform': really_probe: bou= nd device to driver xhci-hcd [ 23.951857] typec port0-partner.0: bus: 'typec': __driver_probe_device: = matched device with driver typec_displayport [ 23.963628] typec port0-partner.0: bus: 'typec': really_probe: probing d= river typec_displayport with device [ 23.974547] typec_displayport port0-partner.0: driver: 'typec_displaypor= t': driver_bound: bound to device [ 23.985243] typec_displayport port0-partner.0: bus: 'typec': really_prob= e: bound device to driver typec_displayport [ 24.252358] usb 5-1: new full-speed USB device number 2 using xhci-hcd [ 24.408085] usb 5-1: not running at top speed; connect to a high speed h= ub [ 24.427935] usb 5-1: bus: 'usb': __driver_probe_device: matched device w= ith driver usb [ 24.441732] usb 5-1: bus: 'usb': really_probe: probing driver usb with d= evice [ 24.462931] usb 5-1: driver: 'usb': driver_bound: bound to device [ 24.475569] usb 5-1: bus: 'usb': really_probe: bound device to driver usb