From nobody Thu Oct 2 07:45:15 2025 Received: from smtpbgjp3.qq.com (smtpbgjp3.qq.com [54.92.39.34]) (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 04B7A17332C; Mon, 22 Sep 2025 01:21:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.92.39.34 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758504096; cv=none; b=d7o2cLb4cs+K/kn9l3YhoBZM28iCH/f3v2DNRsT2hva7Jz67EwinCQ21ARC4MQCYdGDeA1ZP9NJwFi60H5GTycTFL+QK8ZA1wEBWEdzfNExY+0ZYCZfblRuR9DJr2xVr8bUDQ0z0u2HwS+IUn4wPE2MwPfO9QSNralGWdCB34so= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758504096; c=relaxed/simple; bh=u8Zr+mWZOjLQIv8KovRN/165RoC4n1Ipx2xQvrNpJpc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=RQhzld6FdtUh6eEaBRZHaqYbgA/pl8Pfakk8dQyJopFef5atOrGkTwni4HagefklspkfHTFdYUc018eaPqWjD4K44jE9tpbGmdKlRKqSp49OMvXIojClcBeMDvc4ySC+C2EuRSyxfsTFAWZlrio+EQ0r+WB8IYqRtsHBra1+A/Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=airkyi.com; spf=pass smtp.mailfrom=airkyi.com; dkim=pass (1024-bit key) header.d=airkyi.com header.i=@airkyi.com header.b=hp5OAXZn; arc=none smtp.client-ip=54.92.39.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=airkyi.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=airkyi.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=airkyi.com header.i=@airkyi.com header.b="hp5OAXZn" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=airkyi.com; s=altu2504; t=1758504065; bh=bU2sAmzXCR713CrWSoUTQXsce2x0+sMC5yQVrxIUCRM=; h=From:To:Subject:Date:Message-Id; b=hp5OAXZnfvcYiEOnalIQqkanqol5thjeWSEc3caa+ilFkfSMFi0r4Wp8j8gh5mfAj +N9MeNwucQMVlA8zwkoVM+RzUQiXFd7zcVD0V1xyQjq+7cml19YrZuycIPHrvTCCC3 5UBnR9m6YilgTP3jNOFU5kmh5WSmYkDt73284U7M= X-QQ-mid: zesmtpgz1t1758504063t10fb6b9b X-QQ-Originating-IP: DDHFghLsHmSB71st719yB2ojgwG4K8hbUJVFjP+vjd8= Received: from DESKTOP-8BT1A2O.localdomain ( [58.22.7.114]) by bizesmtp.qq.com (ESMTP) with id ; Mon, 22 Sep 2025 09:21:01 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 17509678942044025662 From: Chaoyi Chen To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Vinod Koul , Kishon Vijay Abraham I , Heiko Stuebner , Sandy Huang , Andy Yan , Yubing Zhang , Frank Wang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Amit Sunil Dhamne , Heikki Krogerus , Greg Kroah-Hartman , Chaoyi Chen , Dragan Simic , Johan Jonker , Diederik de Haas , Dmitry Baryshkov , Peter Robinson Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, dri-devel@lists.freedesktop.org Subject: [PATCH v4 4/7] drm/rockchip: cdn-dp: Support handle lane info without extcon Date: Mon, 22 Sep 2025 09:20:36 +0800 Message-Id: <20250922012039.323-5-kernel@airkyi.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20250922012039.323-1-kernel@airkyi.com> References: <20250922012039.323-1-kernel@airkyi.com> X-QQ-SENDSIZE: 520 Feedback-ID: zesmtpgz:airkyi.com:qybglogicsvrsz:qybglogicsvrsz4a-0 X-QQ-XMAILINFO: OB07sFyS3L6p+Qvod07WZ2wWVQ3R2+r1sYbsl6Xuc1dBkdjKARRQs5S0 msulJV0mEe4uDQL0gRbm/EKE9W14yHcdfCA35KiEzPcbv4kFjLpXIO5kRRvrLtX3+QaB6Do TH7IwhbE01khFAH9IUGFDMpKGPBDfgACbDQHGfCIEHxHKDGdZKc+8zeD0AVhA/GmAxqwDd0 Poq9+cwa+ZRm/vuOh7CV+JkKFVoy1ilas+5ZaXJ9YSlSfe8YPUT+btUXTrxPBeNQGB/7bti ifxgStCaxnsZTmgxwYnlzdBefr4umCQuA60tUgxYG+rJiyoW5hiJRpC8pNSSIqXtf5kvP5z HPB/eqfQa+yH1FgejL52ypUTf0jGLuWoa4M9sOmDhCiYjSjxTZo84dODDbBVefIGgo8eOTr /cap6RCNyokuoKSs8tC9YBUPHS+k05FzvJ9ag+n4eyx082OKboEmSFjEvO56V67AuPN4tRt wkgco8VyH/8N3XEyXnh7pVwpY+vNBkM1u/I/TYGj5RVATxtZZRLwNWk25anFlgjG8CFcxP3 zMIF8MYY93pNR5GQ2/iB+SDclBO/1DciPzLS32efSLIb8IRguT0H0R0b9DXyounZ2+qCOx4 z1Ck/+bJzEktryq74U8wrtIMgqPq1rWzduDyXcWBafHEPT1Mwhd6rbGgKhrtNifS9M7dXBm F2BVvCeraVi/oH4MWWptTqhLSo4UnYeq0h5LpYqN/lPqifW4/BpkWAWZPblfURwQL0z2SFZ ueMRuluV7L4m2x62xLudSf8p58qMx+Sve4774lf2+s9pXhPZa/gfKA/9FXmRX4+QJHPK+7+ xlk1U9/gd1ZpO5BkrveycDc/PL61qmQ1f3/PCq3TekzWtUJU7hjgYuY0zXrZh3xXO8gAZc4 SxvV7tyJdEb3GdBI59w2q74L8wFBCDq/wRHSt3pcEIzsVWs28Ir5mfivebln5J4OPSz95MJ wKtUIOTc8eOFUC+XOb6P2AHAi/5X7NQjEgJvPz/8jcZl0DkHGLIDGZhAe X-QQ-XMRINFO: OD9hHCdaPRBwq3WW+NvGbIU= X-QQ-RECHKSPAM: 0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Chaoyi Chen This patch add support for get PHY lane info without help of extcon. There is no extcon needed if the Type-C controller is present. In this case, the lane info can be get from PHY instead of extcon. The extcon device should still be supported if Type-C controller is not present. Signed-off-by: Chaoyi Chen --- Changes in v4: - Remove cdn_dp_hpd_notify(). (no changes since v3) Changes in v2: - Ignore duplicate HPD events. drivers/gpu/drm/rockchip/cdn-dp-core.c | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c b/drivers/gpu/drm/rockc= hip/cdn-dp-core.c index b7e3f5dcf8d5..1e27301584a4 100644 --- a/drivers/gpu/drm/rockchip/cdn-dp-core.c +++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c @@ -156,6 +156,9 @@ static int cdn_dp_get_port_lanes(struct cdn_dp_port *po= rt) int dptx; u8 lanes; =20 + if (!edev) + return phy_get_bus_width(port->phy); + dptx =3D extcon_get_state(edev, EXTCON_DISP_DP); if (dptx > 0) { extcon_get_property(edev, EXTCON_DISP_DP, @@ -219,7 +222,7 @@ static bool cdn_dp_check_sink_connection(struct cdn_dp_= device *dp) * some docks need more time to power up. */ while (time_before(jiffies, timeout)) { - if (!extcon_get_state(port->extcon, EXTCON_DISP_DP)) + if (port->extcon && !extcon_get_state(port->extcon, EXTCON_DISP_DP)) return false; =20 if (!cdn_dp_get_sink_count(dp, &sink_count)) @@ -385,11 +388,14 @@ static int cdn_dp_enable_phy(struct cdn_dp_device *dp= , struct cdn_dp_port *port) goto err_power_on; } =20 - ret =3D extcon_get_property(port->extcon, EXTCON_DISP_DP, - EXTCON_PROP_USB_TYPEC_POLARITY, &property); - if (ret) { - DRM_DEV_ERROR(dp->dev, "get property failed\n"); - goto err_power_on; + property.intval =3D 0; + if (port->extcon) { + ret =3D extcon_get_property(port->extcon, EXTCON_DISP_DP, + EXTCON_PROP_USB_TYPEC_POLARITY, &property); + if (ret) { + DRM_DEV_ERROR(dp->dev, "get property failed\n"); + goto err_power_on; + } } =20 port->lanes =3D cdn_dp_get_port_lanes(port); @@ -1028,6 +1034,9 @@ static int cdn_dp_bind(struct device *dev, struct dev= ice *master, void *data) for (i =3D 0; i < dp->ports; i++) { port =3D dp->port[i]; =20 + if (!port->extcon) + continue; + port->event_nb.notifier_call =3D cdn_dp_pd_event; ret =3D devm_extcon_register_notifier(dp->dev, port->extcon, EXTCON_DISP_DP, @@ -1120,14 +1129,14 @@ static int cdn_dp_probe(struct platform_device *pde= v) PTR_ERR(phy) =3D=3D -EPROBE_DEFER) return -EPROBE_DEFER; =20 - if (IS_ERR(extcon) || IS_ERR(phy)) + if (IS_ERR(phy) || PTR_ERR(extcon) !=3D -ENODEV) continue; =20 port =3D devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); if (!port) return -ENOMEM; =20 - port->extcon =3D extcon; + port->extcon =3D IS_ERR(extcon) ? NULL : extcon; port->phy =3D phy; port->dp =3D dp; port->id =3D i; --=20 2.49.0