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Mon, 19 Jan 2026 15:31:50 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 924543254067491200 From: Chaoyi Chen To: Heikki Krogerus , Greg Kroah-Hartman , Dmitry Baryshkov , Peter Chen , Luca Ceresoli , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Vinod Koul , Kishon Vijay Abraham I , Heiko Stuebner , Sandy Huang , Andy Yan , Yubing Zhang , Frank Wang , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Amit Sunil Dhamne , Chaoyi Chen , Dragan Simic , Johan Jonker , Diederik de Haas , 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 v14 6/9] drm/rockchip: cdn-dp: Support handle lane info without extcon Date: Mon, 19 Jan 2026 15:30:57 +0800 Message-Id: <20260119073100.143-7-kernel@airkyi.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20260119073100.143-1-kernel@airkyi.com> References: <20260119073100.143-1-kernel@airkyi.com> X-QQ-SENDSIZE: 520 Feedback-ID: esmtpsz:airkyi.com:qybglogicsvrgz:qybglogicsvrgz6b-0 X-QQ-XMAILINFO: MVbvI5amSZ2YcLIzxUIrBzKbeXwSVSMKxiEzsA6dGvNwUwuJDMNr1eU+ DWQuZfTvsix0NTXcGPJArZvsHaL7KBUuZ07hGQTsHNjHrSWRJpac+SX7DHRsrAt8RjIkC59 QVtfqPBBf1F264Wpiq0s0PNj3by2s4jRaib7uCCLOLykI1Gz8iwUiauZJP7PwxFZOBvhZGr PfkObAI7rID0WtVu2YNlKdch95+6eHT6tZjLbbfb3N+AQ/ISrtDGzLQpdKygzKYszeXUsLa Y0aIh8TLo/JouIE+5UNHkZVeQbDpb8JIvulSmf9TVkgKMRc5Yq0wJCLDg2iA1wjXC+mUKaX zvYkQPmRA6fqiSe2WJBAS3U31BDd6WaqPX2B8xbZPri+Vma1czTRFgeV5aDMxY8foG6hMZA oMnxJoCVginxyYQoQSnCpyQJoVga4K9rI24vTsObwBKOZT+ZtzGw9+4XJn2yqEoPMSjKTKQ G2fftZw+lekbbpWTSCwPAC+4t+P1lgYQC82j4SzcMjPnkIUYZgeRdC2bDDUIWxIycr4EAIe GNRF3tlhEmOPL7hebv6s7YV9f/6zytFUyGslAcDJAX1r5jyGh0uEnrw6CPpBt1kO/7Zeula 62cdogRS+bTukEHtw9DHw1QfpvRkJOYVDtqnjXL6pc3Qmn0sb6honr22gySTqE42aN59eYJ hkJX8i9pxTrTM2FvPZqWDUcFy1AAwJ8++UjPRTCK0MsodZpJX/QMQ9fU1YEDudya+QnXsHn EV5E+vlULzl6abLOcR2979fB5mM2j7UiG1TJoKsZMLtiOl5jIH71Biwys8V5geJ0rfvlLuJ DLxqds7nC9c66IdmyKiE5W2BVAZbkTwIWmYC/Clkgel6PZWf8/1ut/2yGkK0/Cyasko0oCy kShze33ojXIGZZRlD/SFmy2qQGhcPtbWTlMFIC/4k1gpElainQjs/cW/w+txsi/qEVjbbEv 81Ap9hg97/1mc7Xib+294EmNie8gP0CzrckuFmqGOgSWRcLtXvN2fwtd+MINw8qKb+Ohu3d 5bGOKGKynNAzQ+1LU0z6Jk/sU/nlhbAy8HpfzlPR3ECpawJt6MJBr9Eg1RoZA= X-QQ-XMRINFO: NyFYKkN4Ny6FuXrnB5Ye7Aabb3ujjtK+gg== 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 --- (no changes since v5) 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 2.51.1