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drm/dsi: Add uevent callback

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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: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2016-06-03 14:23:00 +02:00
parent 2a927623e8
commit babb24fec1
2 changed files with 18 additions and 0 deletions
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16
drivers/gpu/drm/drm_mipi_dsi.c
View File

@ -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,
};

2
include/drm/drm_mipi_dsi.h
View File

@ -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);