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c=relaxed/relaxed; d=airkyi.com; s=altu2504; t=1792481357; bh=6sfgVQRfPeZB9Hqtz18Dzql0K28fc/y+GbntbfCgIfE=; h=From:To:Subject:Date:Message-Id; b=WT6M/EEsTu+08B7cJ5zQbVxVyWnWuSfe9WH43N0wEmglhPh0ttjJ7HahuSjrfIzEo NgUKkIVnZQ0vZV+lHBUcrp/glzqZ2UJ6kYMydbzo6p5hNspsrBD9dONQ9MAJzkMG8G 44M1tI/U4WdKJc2PqHxO6mNrZdNL36oxH4cX3BQQ= X-QQ-mid: zesmtpsz4t1792481356t7b55ba3e X-QQ-Originating-IP: PoqMp8+AGb8p9Ii/rbgBGbxueQB7iyGiD+n5xnkg/z8= Received: from DESKTOP-8BT1A2O.localdomain ( [61.154.14.86]) by bizesmtp.qq.com (ESMTP) with id ; Tue, 20 Oct 2026 15:29:10 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 9572358570521721433 From: Chaoyi Chen To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sandy Huang , =?UTF-8?q?Heiko=20St=C3=BCbner?= , Andy Yan , Vinod Koul , Sebastian Reichel , Nicolas Frattaroli , Heikki Krogerus Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-phy@lists.infradead.org, Chaoyi Chen Subject: [PATCH v8 6/7] drm/rockchip: cdn-dp: Support handle lane info without extcon Date: Tue, 20 Oct 2026 15:28:15 +0800 Message-Id: <20261020072816.180-7-kernel@airkyi.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20261020072816.180-1-kernel@airkyi.com> References: <20261020072816.180-1-kernel@airkyi.com> X-QQ-SENDSIZE: 520 Feedback-ID: zesmtpsz:airkyi.com:qybglogicsvrgz:qybglogicsvrgz6b-0 X-QQ-XMAILINFO: MJ6jNhKcfW6R3v6PMslEjS4Ucgmtk3fxIbs0sX9Fh0AEvgILYysUQUa4 SOFUOQ4izeEqXR7uSHS1LaO1aR9AynQzg7hflkwTr7Xxo8QE1OFyjFLCxjOiruqxAp0lU36 9fX5BClBOxUb/Wh+65gQz65b4GcZesEBQQc+pp7WJy0hRamqf5ePiSwTfJB2mOCKwTseabB XMgOxRZBaj8pUbzDYUi9KMMC3yBA55h8B2b01Qors2MUZZErL2tgE39El6H9/1+310LFXgY RpLs9uxK+13j7Fcg+njLlfrTQCSblgf1l8o2tvLE/X+9g9jxjz4TiV9Nlxx9CCcFfz7DK0j Iz1c6pUiMznMJ7UQgAbmFeIRCWd4tuOPEP2Nu6V9XwbxKMoybCada55gp5Xgpb61v+K5FlE LJme9+4xHy0o5Kaw1qVkf+NgzdHBywPAgA0z3vmU6l7LooV+cha8/SuACG9l/d5aFHEooDA mii60NtJZu1vpJKuGiQafIcqZYwVNEaewC7xSXWtlP13jZiEfcD3JPQ/tqpC3UVis0lC08P iJkOhI1uriGVEvUIkLXC4ni5TYurvzL65kU2ldy73PAW72dQEhLiPS2QW111q+PWB6PhuOE kwTeGzWGdWQDWEKhlZO+u+lbA1UiYqjve/XJw4Xr9jP86EtwbeQZcslSzNnAvyuWyWqqVG4 FKLCLbTU67Cfs94enQPT3NwWt7wcUde+1M5MyuQT8RX3oLPjTvcGtKNSHPZQcYWSI5uDLWj kd0ZIJ2FKbmIY++bN3/btEvzsbuHIFcbLS1RxU5hduAaNwADBGFEqP0wXf5Z4LxNg8JdGIq HNg2EO8GxAVYsezJYJceNTVY4pQEj1NZMRz9dOaRSE/MZa4AXAaZ+ClKTTHrYzjJ20mx5de d4vC9WPxQ3TYxEDYMCeSCACkfHtBBGJWXZ2za30WxcT/SmHG9yxldKJa4BEuss9MjqrzLss 4hYD41d0y5zGwCMT9sdimQ6OteJ7lVb2e/p5vMv+vfSw5NKUizb1KRZKfvJZD/Q5+8aL7hU UYlo09iP0xs1GWnjDA X-QQ-XMRINFO: OD9hHCdaPRBwH5bRRRw8tsiH4UAatJqXfg== X-QQ-RECHKSPAM: 0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list 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 Reviewed-by: Heiko Stuebner --- (no changes since v1) --- 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/rockchip/cdn-dp-core.c index 68aa66915e8a..1c1c1116b5eb 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 *port) int dptx; u8 lanes; + if (!edev) + return phy_get_bus_width(port->phy); + dptx = 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; 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; } - ret = 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 = 0; + if (port->extcon) { + ret = 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; + } } port->lanes = cdn_dp_get_port_lanes(port); @@ -1030,6 +1036,9 @@ static int cdn_dp_bind(struct device *dev, struct device *master, void *data) for (i = 0; i < dp->ports; i++) { port = dp->port[i]; + if (!port->extcon) + continue; + port->event_nb.notifier_call = cdn_dp_pd_event; ret = devm_extcon_register_notifier(dp->dev, port->extcon, EXTCON_DISP_DP, @@ -1122,14 +1131,14 @@ static int cdn_dp_probe(struct platform_device *pdev) PTR_ERR(phy) == -EPROBE_DEFER) return -EPROBE_DEFER; - if (IS_ERR(extcon) || IS_ERR(phy)) + if (IS_ERR(phy) || PTR_ERR(extcon) != -ENODEV) continue; port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); if (!port) return -ENOMEM; - port->extcon = extcon; + port->extcon = IS_ERR(extcon) ? NULL : extcon; port->phy = phy; port->dp = dp; port->id = i; -- 2.53.0