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Subject[PATCH] drm/rockchip: handle non-platform devices in rockchip_drm_endpoint_is_subdriver
Date
As discussed at [1] rockchip_drm_endpoint_is_subdriver will currently always
return -ENODEV for non-platform-devices (e.g. external i2c bridges), what
makes them never being considered in rockchip_rgb_init.

As suggested at [1] this additionally adds a of_device_is_available for
the node found, which will work for both platform and non-platform devices.
Also we can return early for non-platform-devices if they are enabled,
as rockchip_sub_drivers contains exclusively platform-devices.

[1] https://lore.kernel.org/all/20210316182753.GA25685@earth.li/

Suggested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Alex Bee <knaerzche@gmail.com>
---
drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index bfba9793d238..81a5ec30ef4f 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -275,10 +275,17 @@ int rockchip_drm_endpoint_is_subdriver(struct device_node *ep)
return -ENODEV;

/* status disabled will prevent creation of platform-devices */
+ if (!of_device_is_available(node)) {
+ of_node_put(node);
+ return -ENODEV;
+ }
+
pdev = of_find_device_by_node(node);
of_node_put(node);
+
+ /* enabled non-platform-devices can immediately return here */
if (!pdev)
- return -ENODEV;
+ return false;

/*
* All rockchip subdrivers have probed at this point, so
base-commit: 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f
--
2.30.2

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