target/linux/brcm2708/patches-4.4/0448-drm-Emit-modalias-uevents-for-the-DSI-devices-we-cre.patch

   1 From e46450e232a96665344b825557bacf1d37842174 Mon Sep 17 00:00:00 2001
   2 From: Eric Anholt <eric@anholt.net>
   3 Date: Tue, 9 Aug 2016 15:13:33 -0700
   4 Subject: [PATCH] drm: Emit modalias uevents for the DSI devices we create.
   5
   6 This gets the Raspberry Pi panel module to automatically load at boot
   7 time.
   8
   9 Signed-off-by: Eric Anholt <eric@anholt.net>
  10 ---
  11  drivers/gpu/drm/drm_mipi_dsi.c | 19 +++++++++++++++++++
  12  1 file changed, 19 insertions(+)
  13
  14 --- a/drivers/gpu/drm/drm_mipi_dsi.c
  15 +++ b/drivers/gpu/drm/drm_mipi_dsi.c
  16 @@ -50,6 +50,24 @@ static int mipi_dsi_device_match(struct
  17         return of_driver_match_device(dev, drv);
  18  }
  19
  20 +/**
  21 + * Send modalias events when devices are created on the bus, so that
  22 + * modules can load automatically.
  23 + */
  24 +static int mipi_dsi_uevent(struct device *dev, struct kobj_uevent_env *env)
  25 +{
  26 +       int rc;
  27 +
  28 +       /* Just do the OF uevent, which emits the compatible string so
  29 +        * that a MODULE_DEVICE_TABLE(of, ...) works.
  30 +        */
  31 +       rc = of_device_uevent_modalias(dev, env);
  32 +       if (rc != -ENODEV)
  33 +               return rc;
  34 +
  35 +       return 0;
  36 +}
  37 +
  38  static const struct dev_pm_ops mipi_dsi_device_pm_ops = {
  39         .runtime_suspend = pm_generic_runtime_suspend,
  40         .runtime_resume = pm_generic_runtime_resume,
  41 @@ -65,6 +83,7 @@ static struct bus_type mipi_dsi_bus_type
  42         .name = "mipi-dsi",
  43         .match = mipi_dsi_device_match,
  44         .pm = &mipi_dsi_device_pm_ops,
  45 +       .uevent = mipi_dsi_uevent,
  46  };
  47
  48  static int of_device_match(struct device *dev, void *data)