From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 36DA510D14A4 for ; Mon, 30 Mar 2026 11:51:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Reply-To:Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date :Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=MVmn2Dh+bO7BiuLYmdHIndaiIBAjux5Q91KQ+/MBtdE=; b=WCGwxFi4B3JxXUgSuBznMTddj5 22KiEWMQ9bZxNeEFlK7okVILp0+Kzzg20g9Mt2ikSZiwMDlHawvu6HXjIGlH3b3fWI9QXucMBWM+9 2iWv5tbUaPXdV0Ilh6wVZlNNkHM+j1GBO3SF54fsy4Dl5ovrXZVxHEl6tYtNrraQZXhYIBBPsTUuS 8eyIfQg6ePfFxnNc190svrEebXUFiGd5rAn23hg7Hx9MA3o/f7b8n04JleP19v7QEC2emdJXK//ZA Hp50fcwvNCsB9x7jms8D+u7+E0wGOh4yqzprFWM5yhB11QZgddwGP5V8ml/RhsX1uLw8ZO3R4p2mo mdy3uO0w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7B9S-0000000BByY-1r8e; Mon, 30 Mar 2026 11:51:26 +0000 Received: from sender4-pp-f112.zoho.com ([136.143.188.112]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7B9Q-0000000BByB-3LJX for linux-rockchip@lists.infradead.org; Mon, 30 Mar 2026 11:51:25 +0000 ARC-Seal: i=1; a=rsa-sha256; t=1774871452; cv=none; d=zohomail.com; s=zohoarc; b=j1Hk0CJjKXW9sdMYJFRvns9c4GgmWAHXiggeVrANYvF1e1WO5eno+KkVL6B3B1XSTfyss1tCOavcuBwFIA39wg2XoZLFeMOQ6R2yDX7HYiNuWpylmiTAgzRH4D8+fgYBr/8ObKoPMMmWx4+z6QrCHts093ivdZnRJbkEo+KAVhU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1774871452; h=Content-Type:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=15SW2UZmj9L14ZbmYWu+YmNSkGcYxzsZ3KRbJg87q3I=; b=ltr1S2zrc13lTBv79d17gVoPxYOG6eJXRBaiLa1zWFHbAnGVcQEmQ4p3QKG+rGmdUQni931HC3MDEKPrf0zJRqITZWb78MdG5j3/VHL+UCqU9lR5uKiA4GzDojCdTddugbLRVv9Xi/GXFHhPvv3DdtNI/q1ICckzOeJ+b7FR2gk= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=sebastian.reichel@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1774871452; s=zohomail; d=collabora.com; i=sebastian.reichel@collabora.com; h=Date:Date:From:From:To:To:Cc:Cc:Subject:Subject:Message-ID:References:MIME-Version:Content-Type:In-Reply-To:Message-Id:Reply-To; bh=15SW2UZmj9L14ZbmYWu+YmNSkGcYxzsZ3KRbJg87q3I=; b=bAXQbXc3kLCDPaMQ3hzqjOzdOkJZb9WfT560GF++gIgBEHo3aq1lRXSRAUiqxx9D iq2LwXzZa7mcVfod2M2LkAVYifPtpmFB45xa48FhAizJ/wxDiuTmBgg+sdjYx5EtGKI wPDruAutV0u+McDWdI4kKzSyXoZtK8gR45M/DTDU= Received: by mx.zohomail.com with SMTPS id 177487144983591.88336926880925; Mon, 30 Mar 2026 04:50:49 -0700 (PDT) Received: by venus (Postfix, from userid 1000) id B8AC91804F1; Mon, 30 Mar 2026 13:50:43 +0200 (CEST) Date: Mon, 30 Mar 2026 13:50:43 +0200 From: Sebastian Reichel To: Chaoyi Chen Cc: Sandy Huang , Heiko =?utf-8?Q?St=C3=BCbner?= , 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 , 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 Subject: Re: [PATCH 00/10] Synopsys DisplayPort Controller improvements for Rockchip platforms Message-ID: References: <20260326-synopsys-dw-dp-improvements-v1-0-501849162290@collabora.com> MIME-Version: 1.0 In-Reply-To: X-Zoho-Virus-Status: 1 X-Zoho-AV-Stamp: zmail-av-0.2.2.1.5.2/274.861.95 X-ZohoMailClient: External X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260330_045124_921152_4565A80B X-CRM114-Status: GOOD ( 15.73 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============3746882275462251648==" Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org --===============3746882275462251648== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="ez6uvywry5y7oix6" Content-Disposition: inline --ez6uvywry5y7oix6 Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH 00/10] Synopsys DisplayPort Controller improvements for Rockchip platforms MIME-Version: 1.0 Hello Chaoyi, On Mon, Mar 30, 2026 at 09:34:15AM +0800, Chaoyi Chen wrote: > > There are two parts, which possibly need some discussion: > >=20 > > 1. I added a dedicated bridge callback for out-of-band hotplug events, > > which is separate from the hotplug_notify. I have a feeling, that > > there might be a better solution, but haven't found it. >=20 > Could you explain what an out-of-band hotplug event is? >=20 > Can't the drivers/usb/typec/altmodes/displayport.c respond to these > hot-plug events? Thank you. That is what generates the out-of-band hotplug event in the first place via drm_connector_oob_hotplug_event(). The oob in that call means out of band. If you look at that function it calls oob_hotplug_event() callback on the DRM connector, which is then implemented by drm_bridge_connector_oob_hotplug_event(). This function calls uses the normal hpd handling (shared by in-band and out-of-band) and I'm patching it, so that the bridges are aware of hpd explicitly being provided out-of-band. Greetings, -- Sebastian --ez6uvywry5y7oix6 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE72YNB0Y/i3JqeVQT2O7X88g7+poFAmnKY5AACgkQ2O7X88g7 +ppCWQ/9FPgpYzVbuIaK1W4l+x0qPYHV6vLjMwbbsc0KleVql8OJlXxjkvOCyN/f l1VW8NiYtCsRcwffTey5PgDjwPCscQT9y9L4w2kRbJhGsCe/zwaYIvuQfp6hPrkY OLDnBG3FoxxDxwR0wSK1buk+joq6UcLX8ZvB96C99j4MifkarRROr6UEzU6f7rIO 47KouuDZLCCd2hujJ2dVOmAhWoZrI9tGworvDdQYFWrpEkehDubrg15cbNJ3ob7W KuagSE2REZF2KDM1wgzEcA3VzrYVvz1p4vpsffgR1uqZ4ds7F8+0TB61EURI1rJV wXR7En0dBIRgRjebfw5gRq6kt+MCZLAuPn0LBCtRAotK0JsdGlhuM3MMJKay5Bx5 NUZ4obzJob04VqWMrlcN1PoTs/la+1ZMg32TO3vhyhAdpGIBDXS3mfyXKNzcDcsy i41OK3i7GwRlpeqv7XiGCLTVGjkqf3D+qxzkuS6yejaP4AuMyFwgUfL1ePfEHU1X +7spbpwiVijXY3Fb7gyTU3KggqStX43D7wHkXNTIRKtrWAXXJ3FrKT+RTzjDUPYm MLwfdEzLxXpC0kJ/7O+D128J5BIRLzM1kaN8RD+UtMSEjyA0lYfP6tGXfjMEQrxP xMfJpD5qcTvl2ktQYOa8+V6NJzVOyo6BWxH73GQpe3t9w+0zU0I= =wqPq -----END PGP SIGNATURE----- --ez6uvywry5y7oix6-- --===============3746882275462251648== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip --===============3746882275462251648==--