Commit babb24fe authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/dsi: Add uevent callback 



Implement a uevent callback for devices on the MIPI DSI bus. This
callback will append MODALIAS information to the uevent and allow
modules to be loaded when devices are added to the bus.

Reviewed-by: default avatarArchit Taneja <architt@codeaurora.org>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 2a927623

drivers/gpu/drm/drm_mipi_dsi.c

+16 −0
Original line number Diff line number Diff line
@@ -60,6 +60,21 @@ static int mipi_dsi_device_match(struct device *dev, struct device_driver *drv) 
	return 0;

}



static int mipi_dsi_uevent(struct device *dev, struct kobj_uevent_env *env)

{

	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);

	int err;



	err = of_device_uevent_modalias(dev, env);

	if (err != -ENODEV)

		return err;



	add_uevent_var(env, "MODALIAS=%s%s", MIPI_DSI_MODULE_PREFIX,

		       dsi->name);



	return 0;

}



static const struct dev_pm_ops mipi_dsi_device_pm_ops = {

	.runtime_suspend = pm_generic_runtime_suspend,

	.runtime_resume = pm_generic_runtime_resume,
@@ -74,6 +89,7 @@ static const struct dev_pm_ops mipi_dsi_device_pm_ops = { 
static struct bus_type mipi_dsi_bus_type = {

	.name = "mipi-dsi",

	.match = mipi_dsi_device_match,

	.uevent = mipi_dsi_uevent,

	.pm = &mipi_dsi_device_pm_ops,

};

include/drm/drm_mipi_dsi.h

+2 −0
Original line number Diff line number Diff line
@@ -180,6 +180,8 @@ struct mipi_dsi_device { 
	unsigned long mode_flags;

};



#define MIPI_DSI_MODULE_PREFIX "mipi-dsi:"



static inline struct mipi_dsi_device *to_mipi_dsi_device(struct device *dev)

{

	return container_of(dev, struct mipi_dsi_device, dev);

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