target/linux/bcm27xx/patches-5.15/950-0794-drm-mipi-dbi-Add-driver_private-member-to-struct-mip.patch

   1 From 9dae4a5ff13701f15f051e3911a83a1e497a4bc3 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
   3 Date: Sun, 27 Feb 2022 13:47:12 +0100
   4 Subject: [PATCH] drm/mipi-dbi: Add driver_private member to struct
   5  mipi_dbi_dev
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 commit 1e7e8e1 upstream.
  11
  12 devm_drm_dev_alloc() can't allocate structures that embed a structure
  13 which then again embeds drm_device. Workaround this by adding a
  14 driver_private pointer to struct mipi_dbi_dev which the driver can use for
  15 its additional state.
  16
  17 v3:
  18 - Add documentation
  19
  20 Acked-by: Maxime Ripard <maxime@cerno.tech>
  21 Acked-by: Sam Ravnborg <sam@ravnborg.org>
  22 Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
  23 Signed-off-by: Maxime Ripard <maxime@cerno.tech>
  24 Link: https://patchwork.freedesktop.org/patch/msgid/20220227124713.39766-5-noralf@tronnes.org
  25 ---
  26  include/drm/drm_mipi_dbi.h | 8 ++++++++
  27  1 file changed, 8 insertions(+)
  28
  29 --- a/include/drm/drm_mipi_dbi.h
  30 +++ b/include/drm/drm_mipi_dbi.h
  31 @@ -130,6 +130,14 @@ struct mipi_dbi_dev {
  32          * @dbi: MIPI DBI interface
  33          */
  34         struct mipi_dbi dbi;
  35 +
  36 +       /**
  37 +        * @driver_private: Driver private data.
  38 +        *                  Necessary for drivers with private data since devm_drm_dev_alloc()
  39 +        *                  can't allocate structures that embed a structure which then again
  40 +        *                  embeds drm_device.
  41 +        */
  42 +       void *driver_private;
  43  };
  44
  45  static inline struct mipi_dbi_dev *drm_to_mipi_dbi_dev(struct drm_device *drm)