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Message-Id: <1464066155-22777-1-git-send-email-ykk@rock-chips.com> Date: Tue, 24 May 2016 13:02:35 +0800 From: Yakir Yang <ykk@...k-chips.com> To: David Airlie <airlied@...ux.ie>, Inki Dae <inki.dae@...sung.com>, Mark Yao <yzq@...k-chips.com>, Thierry Reding <treding@...dia.com>, Jingoo Han <jingoohan1@...il.com>, Rob Herring <robh+dt@...nel.org> Cc: Krzysztof Kozlowski <k.kozlowski@...sung.com>, Heiko Stuebner <heiko@...ech.de>, Douglas Anderson <dianders@...omium.org>, Daniel Vetter <daniel.vetter@...ll.ch>, Javier Martinez Canillas <javier@....samsung.com>, emil.l.velikov@...il.com, Dan Carpenter <dan.carpenter@...cle.com>, linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org, linux-samsung-soc@...r.kernel.org, linux-rockchip@...ts.infradead.org, Yakir Yang <ykk@...k-chips.com> Subject: [PATCH v2 06/10] drm/rockchip: analogix_dp: make panel detect to an optional action Some boards don't need to declare a panel device node, like the display interface is DP monitors, so it's necessary to make the panel detect to an optional action. Signed-off-by: Yakir Yang <ykk@...k-chips.com> --- Changes in v2: None drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 48 ++++++++++++------------- 1 file changed, 22 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c index d684c97..f29ca3d 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -325,38 +325,34 @@ static int rockchip_dp_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct device_node *panel_node, *port, *endpoint; + struct drm_panel *panel = NULL; struct rockchip_dp_device *dp; - struct drm_panel *panel; port = of_graph_get_port_by_id(dev->of_node, 1); - if (!port) { - dev_err(dev, "can't find output port\n"); - return -EINVAL; - } - - endpoint = of_get_child_by_name(port, "endpoint"); - of_node_put(port); - if (!endpoint) { - dev_err(dev, "no output endpoint found\n"); - return -EINVAL; - } - - panel_node = of_graph_get_remote_port_parent(endpoint); - of_node_put(endpoint); - if (!panel_node) { - dev_err(dev, "no output node found\n"); - return -EINVAL; - } - - panel = of_drm_find_panel(panel_node); - if (!panel) { - DRM_ERROR("failed to find panel\n"); + if (port) { + endpoint = of_get_child_by_name(port, "endpoint"); + of_node_put(port); + if (!endpoint) { + dev_err(dev, "no output endpoint found\n"); + return -EINVAL; + } + + panel_node = of_graph_get_remote_port_parent(endpoint); + of_node_put(endpoint); + if (!panel_node) { + dev_err(dev, "no output node found\n"); + return -EINVAL; + } + + panel = of_drm_find_panel(panel_node); + if (!panel) { + DRM_ERROR("failed to find panel\n"); + of_node_put(panel_node); + return -EPROBE_DEFER; + } of_node_put(panel_node); - return -EPROBE_DEFER; } - of_node_put(panel_node); - dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); if (!dp) return -ENOMEM; -- 1.9.1
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