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(unknown [58.22.7.114]) by smtp.qiye.163.com (Hmail) with ESMTP id 396d58c9f; Fri, 3 Apr 2026 15:00:42 +0800 (GMT+08:00) From: Damon Ding To: andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, hjc@rock-chips.com, heiko@sntech.de, andy.yan@rock-chips.com, wens@kernel.org, samuel@sholland.org, luca.ceresoli@bootlin.com Cc: Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, victor.liu@nxp.com, dmitry.baryshkov@oss.qualcomm.com, shengjiu.wang@nxp.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-sunxi@lists.linux.dev, Damon Ding Subject: [PATCH v1 4/4] drm/rockchip: dw_hdmi: Support to find the next bridge Date: Fri, 3 Apr 2026 15:00:32 +0800 Message-Id: <20260403070032.447102-5-damon.ding@rock-chips.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260403070032.447102-1-damon.ding@rock-chips.com> References: <20260403070032.447102-1-damon.ding@rock-chips.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-HM-Tid: 0a9d5224e24f03a3kunm1d6b6bc811ded4 X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFDSUNOT01LS0k3V1ktWUFJV1kPCRoVCBIfWUFZGhkeTFZIQ09NQ0hKSktLHR5WFRQJFh oXVRMBExYaEhckFA4PWVdZGBILWUFZTkNVSUlVTFVKSk9ZV1kWGg8SFR0UWUFZT0tIVUpLSU9PT0 hVSktLVUpCS0tZBg++ DKIM-Signature: a=rsa-sha256; b=aFs31TTZtr+bCfSkmGEJmc0xRV7zEwxDbZrhSC+mQNg0U67RwMRuJMxl4yptVlC6kZi5QRfl2dSs3ey2cwYI+2sXDp6VJgBZEO9JDJITLh/JRY5CKD1HhV4l/ODhISn/XFR3t4jpqT9q9y/19yiV87id2R+hDfWQw9s+LbJU9AY=; s=default; c=relaxed/relaxed; d=rock-chips.com; v=1; bh=qhMDeS5MJsqMangPhhuZJQL2DTnTsaxRf2SE3asViXM=; h=date:mime-version:subject:message-id:from; If there is a remote node connected to the HDMI output (port@1), the &dw_hdmi_plat_data.output_port should be set to 1. This patch allows Rockchip dw-hdmi to support the hdmi-connector and the next bridge. Signed-off-by: Damon Ding --- drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c index b5cfcb936078..014ac09fd733 100644 --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c @@ -544,6 +544,8 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master, struct drm_encoder *encoder; struct rockchip_hdmi *hdmi; struct drm_connector *connector; + struct device_node *remote; + struct drm_bridge *next_bridge; int ret; if (!pdev->dev.of_node) @@ -610,6 +612,18 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master, platform_set_drvdata(pdev, hdmi); + remote = of_graph_get_remote_node(hdmi->dev->of_node, 1, -1); + if (remote) { + of_node_put(remote); + + ret = drm_of_find_panel_or_bridge(hdmi->dev->of_node, 1, 0, + NULL, &next_bridge); + if (ret && ret != -ENODEV) + goto err_cleanup_encoder; + + plat_data->output_port = 1; + } + hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data, DRM_BRIDGE_ATTACH_NO_CONNECTOR); /* -- 2.34.1