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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: Mo8ayuSLF3j9OU6X1X94tpisK5yJqIjLovmg0uqQHW5buohGOUnXGJr3 lteM3XNIu+4T3hQYuETSLYr4pV4ZJOSUjbxKerkb8MRLf5YorQemNLumi0FNj6S6pQ5htYl n4/6KGRnOFpKwSDNee52KlkAueR8z6R9G8ZkugtaakdbgXhT1FgDknN3ZS0uLXqdIc7HJw1 aC7/mknGa8j3UNqgnDSF0vxllmQ6DQqkYigEdIEOtrf0dfpgTCpY5s/f8GxL71rcnseSUK2 RPuil8XgzcvtvyGZqHhBPaqnnHKsmoHaeDlB92GgRoS5A4BRO9IGPRMZUpHNNkvR+vKEoBW xospj+TG32te1dx7h3ob4HiGLKX/qmlTcJfKqN6WduC1iYC5KbpKHz4nqUY2wRlvVEdHAaE 1p/dbCO9/VdZ7ErWJa2/L0R04GL1gL/7F1EtbWBRROSMvkhGEefJFxV0VwEccipP2PB8XYB +DNh4CVonmqfdGzEyup7aoxJviLPLX62BDEdm9Xcxx0E7L0TGpxSBBQGKpr/vTKLrAv/pWI KXE+5jc6dVeWHvlKOjXRVGcXQqqlVkput4zM31JwGkJspKVzOnJfU1Xz/mcX8vtSDjIGwiY zhUZODc9RpuXP3QNFlACkYObc/MHzwKXI1yKb7EIEdlwteVNiyrz4Lz3Umsezy2HENhTqpQ 43rGohlGSocStdWiW4YwVftDJFJ1I802ogG9f5h2QwPGXtlQm0qrlqZUOClxTHMXST8bBXF 9GyJ9iO+E97LXppGIYg+fsoKnSqhLszpB7/DqdWHFbYq+sBT/UGmaO1YGHmXRhadUhR+SaI B5krZajV9hJ6AyZFqAZMh4HTzmpmfhXqKWSwNdVsv4FKRXka3CApbEawmch/mVYB91jKFNQ Bd+7wEFhiBpo06v8fLF9D7DO5tItK1eJBrlr/uApdXjJY5NroOd3BDEJNKsmSrUgkgSd2HJ j9E7GiESMoiXmEUtu88huymB8mTL3Jq5RsBXDTZ4OoF9SmucCCtjucfCXLlQzXzidQQF4Dd 9Ustlk5WQO+1bmSddo X-QQ-XMRINFO: Nq+8W0+stu50tPAe92KXseR0ZZmBTk3gLg== X-QQ-RECHKSPAM: 0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261020_003025_996245_7FC232F1 X-CRM114-Status: GOOD ( 15.50 ) X-Spam-Score: -2.1 (--) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Archive: List-Post: List-Help: List-Subscribe: , X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" X-Spam-Status: No, score=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 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 _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip