2017-02-06 16:12:09 +00:00
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From 4f0506089cef66d8138da5f611e621a24b9d7296 Mon Sep 17 00:00:00 2001
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2016-09-10 12:54:26 +00:00
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From: Eric Anholt <eric@anholt.net>
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Date: Tue, 9 Aug 2016 15:13:33 -0700
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Subject: [PATCH] drm: Emit modalias uevents for the DSI devices we create.
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This gets the Raspberry Pi panel module to automatically load at boot
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time.
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Signed-off-by: Eric Anholt <eric@anholt.net>
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---
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drivers/gpu/drm/drm_mipi_dsi.c | 19 +++++++++++++++++++
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1 file changed, 19 insertions(+)
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--- a/drivers/gpu/drm/drm_mipi_dsi.c
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+++ b/drivers/gpu/drm/drm_mipi_dsi.c
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@@ -50,6 +50,24 @@ static int mipi_dsi_device_match(struct
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return of_driver_match_device(dev, drv);
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}
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+/**
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+ * Send modalias events when devices are created on the bus, so that
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+ * modules can load automatically.
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+ */
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+static int mipi_dsi_uevent(struct device *dev, struct kobj_uevent_env *env)
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+{
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+ int rc;
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+
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+ /* Just do the OF uevent, which emits the compatible string so
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+ * that a MODULE_DEVICE_TABLE(of, ...) works.
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+ */
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+ rc = of_device_uevent_modalias(dev, env);
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+ if (rc != -ENODEV)
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+ return rc;
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+
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+ return 0;
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+}
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+
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static const struct dev_pm_ops mipi_dsi_device_pm_ops = {
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.runtime_suspend = pm_generic_runtime_suspend,
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.runtime_resume = pm_generic_runtime_resume,
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@@ -65,6 +83,7 @@ static struct bus_type mipi_dsi_bus_type
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.name = "mipi-dsi",
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.match = mipi_dsi_device_match,
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.pm = &mipi_dsi_device_pm_ops,
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+ .uevent = mipi_dsi_uevent,
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};
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static int of_device_match(struct device *dev, void *data)
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