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From e46450e232a96665344b825557bacf1d37842174 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Tue, 9 Aug 2016 15:13:33 -0700
Subject: [PATCH] drm: Emit modalias uevents for the DSI devices we create.
This gets the Raspberry Pi panel module to automatically load at boot
time.
Signed-off-by: Eric Anholt <eric@anholt.net>
---
drivers/gpu/drm/drm_mipi_dsi.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -50,6 +50,24 @@ static int mipi_dsi_device_match(struct
return of_driver_match_device(dev, drv);
}
+/**
+ * Send modalias events when devices are created on the bus, so that
+ * modules can load automatically.
+ */
+static int mipi_dsi_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ int rc;
+
+ /* Just do the OF uevent, which emits the compatible string so
+ * that a MODULE_DEVICE_TABLE(of, ...) works.
+ */
+ rc = of_device_uevent_modalias(dev, env);
+ if (rc != -ENODEV)
+ return rc;
+
+ 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,
@@ -65,6 +83,7 @@ static struct bus_type mipi_dsi_bus_type
.name = "mipi-dsi",
.match = mipi_dsi_device_match,
.pm = &mipi_dsi_device_pm_ops,
+ .uevent = mipi_dsi_uevent,
};
static int of_device_match(struct device *dev, void *data)
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