[PATCH 05/12] of: graph: Allow disabled endpoints
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: 2021-11-17 14:34:24
Also in:
dri-devel, linux-devicetree, linux-rockchip
Subsystem:
drm drivers, drm drivers and misc gpu patches, open firmware and flattened device tree, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Rob Herring, Saravana Kannan, Linus Torvalds
There are cases in which a SoC allows many different routes between components, but not all of them make sense for a board. With this patch we allow standard status = "disabled" properties for ports. With this a SoC level dtsi file can describe all possible ports and only the ones that make sense for the given hardware are enabled at board level. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> --- drivers/gpu/drm/drm_of.c | 6 ++---- drivers/of/property.c | 3 +++ 2 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c
index 37c34146eea83..c2fd9fe505767 100644
--- a/drivers/gpu/drm/drm_of.c
+++ b/drivers/gpu/drm/drm_of.c@@ -67,10 +67,8 @@ uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, for_each_endpoint_of_node(port, ep) { remote_port = of_graph_get_remote_port(ep); - if (!remote_port) { - of_node_put(ep); - return 0; - } + if (!remote_port) + continue; possible_crtcs |= drm_of_crtc_port_mask(dev, remote_port);
diff --git a/drivers/of/property.c b/drivers/of/property.c
index a3483484a5a2a..40f8da7baa0a9 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c@@ -730,6 +730,9 @@ EXPORT_SYMBOL(of_graph_get_endpoint_by_regs); */ struct device_node *of_graph_get_remote_endpoint(const struct device_node *node) { + if (!of_device_is_available(node)) + return NULL; + /* Get remote endpoint node. */ return of_parse_phandle(node, "remote-endpoint", 0); }
--
2.30.2
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