Merge tag 'drm-misc-next-2022-05-05' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 5.19:

UAPI Changes:

Cross-subsystem Changes:

Core Changes:
  - Add DRM-managed mutex initialisation
  - edid: Doc improvements
  - fbdev: deferred io improvements
  - format-helper: consolidate format conversion helpers
  - gem: Rework fence handling in drm_gem_plane_helper_prepare_fb

Driver Changes:
  - ast: DisplayPort support, locking improvements
  - exynos: Revert conversion to devm_drm_of_get_bridge for DSI
  - mgag200: locking improvements
  - mxsfb: LCDIF CRC support
  - nouveau: switch to drm_gem_plane_helper_prepare_fb
  - rockchip: Refactor IOMMU initialisation, make some structures
              static, replace drm_detect_hdmi_monitor with
              drm_display_info.is_hdmi, support swapped YUV formats,
              clock improvements, rk3568 support, VOP2 support
  - bridge:
    - adv7511: Enable CEC for ADV7535
    - it6505: Send DPCD SET_POWER to monitor at disable
    - mcde_dsi: Revert conversion to devm_drm_of_get_bridge
    - tc358767: Fix for eDP and DP DT endpoint parsing
    - new bridge: i.MX8MP LDB
  - panel:
    - new panel: Startek KD070WVFPA043-C069A

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220505131127.lcqvsywo7qt3eywk@houat

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_managed.c b/drivers/gpu/drm/drm_managed.c
index 37d7db6223be..4cf214de50c4 100644
--- a/drivers/gpu/drm/drm_managed.c
+++ b/drivers/gpu/drm/drm_managed.c
@@ -8,6 +8,7 @@
 #include <drm/drm_managed.h>
 
 #include <linux/list.h>
+#include <linux/mutex.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 
@@ -262,3 +263,29 @@ void drmm_kfree(struct drm_device *dev, void *data)
 	free_dr(dr_match);
 }
 EXPORT_SYMBOL(drmm_kfree);
+
+static void drmm_mutex_release(struct drm_device *dev, void *res)
+{
+	struct mutex *lock = res;
+
+	mutex_destroy(lock);
+}
+
+/**
+ * drmm_mutex_init - &drm_device-managed mutex_init()
+ * @dev: DRM device
+ * @lock: lock to be initialized
+ *
+ * Returns:
+ * 0 on success, or a negative errno code otherwise.
+ *
+ * This is a &drm_device-managed version of mutex_init(). The initialized
+ * lock is automatically destroyed on the final drm_dev_put().
+ */
+int drmm_mutex_init(struct drm_device *dev, struct mutex *lock)
+{
+	mutex_init(lock);
+
+	return drmm_add_action_or_reset(dev, drmm_mutex_release, lock);
+}
+EXPORT_SYMBOL(drmm_mutex_init);