Merge tag 'drm-misc-next-2024-03-28' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

Two misc-next in one.

drm-misc-next for v6.10-rc1:

The deal of a lifetime! You get ALL of the previous
drm-misc-next-2024-03-21-1 tag!!

But WAIT, there's MORE!

Cross-subsystem Changes:
- Assorted DT binding updates.

Core Changes:
- Clarify how optional wait_hpd_asserted is.
- Shuffle Kconfig names around.

Driver Changes:
- Assorted build fixes for panthor, imagination,
- Add AUO B120XAN01.0 panels.
- Assorted small fixes to panthor, panfrost.

drm-misc-next for v6.10:
UAPI Changes:
- Move some nouveau magic constants to uapi.

Cross-subsystem Changes:
- Move drm-misc to gitlab and freedesktop hosting.
- Add entries for panfrost.

Core Changes:
- Improve placement for TTM bo's in idle/busy handling.
- Improve drm/bridge init ordering.
- Add CONFIG_DRM_WERROR, and use W=1 for drm.
- Assorted documentation updates.
- Make more (drm and driver) headers self-contained and add header
  guards.
- Grab reservation lock in pin/unpin callbacks.
- Fix reservation lock handling for vmap.
- Add edp and edid panel matching, use it to fix a nearly identical
  panel.

Driver Changes:
- Add drm/panthor driver and assorted fixes.
- Assorted small fixes to xlnx, panel-edp, tidss, ci, nouveau,
  panel and bridge drivers.
- Add Samsung s6e3fa7, BOE NT116WHM-N44, CMN N116BCA-EA1,
  CrystalClear CMT430B19N00, Startek KD050HDFIA020-C020A,
  powertip PH128800T006-ZHC01 panels.
- Fix console for omapdrm.

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

From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/bea310a6-6ff6-477e-9363-f9f053cfd12a@linux.intel.com

1 files changed, 81 insertions, 11 deletions

diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
index 9403b3f576f7..77fe217aeaf3 100644
--- a/drivers/gpu/drm/drm_client.c
+++ b/drivers/gpu/drm/drm_client.c
@@ -305,6 +305,66 @@ err_delete:
 }
 
 /**
+ * drm_client_buffer_vmap_local - Map DRM client buffer into address space
+ * @buffer: DRM client buffer
+ * @map_copy: Returns the mapped memory's address
+ *
+ * This function maps a client buffer into kernel address space. If the
+ * buffer is already mapped, it returns the existing mapping's address.
+ *
+ * Client buffer mappings are not ref'counted. Each call to
+ * drm_client_buffer_vmap_local() should be closely followed by a call to
+ * drm_client_buffer_vunmap_local(). See drm_client_buffer_vmap() for
+ * long-term mappings.
+ *
+ * The returned address is a copy of the internal value. In contrast to
+ * other vmap interfaces, you don't need it for the client's vunmap
+ * function. So you can modify it at will during blit and draw operations.
+ *
+ * Returns:
+ *	0 on success, or a negative errno code otherwise.
+ */
+int drm_client_buffer_vmap_local(struct drm_client_buffer *buffer,
+				 struct iosys_map *map_copy)
+{
+	struct drm_gem_object *gem = buffer->gem;
+	struct iosys_map *map = &buffer->map;
+	int ret;
+
+	drm_gem_lock(gem);
+
+	ret = drm_gem_vmap(gem, map);
+	if (ret)
+		goto err_drm_gem_vmap_unlocked;
+	*map_copy = *map;
+
+	return 0;
+
+err_drm_gem_vmap_unlocked:
+	drm_gem_unlock(gem);
+	return 0;
+}
+EXPORT_SYMBOL(drm_client_buffer_vmap_local);
+
+/**
+ * drm_client_buffer_vunmap_local - Unmap DRM client buffer
+ * @buffer: DRM client buffer
+ *
+ * This function removes a client buffer's memory mapping established
+ * with drm_client_buffer_vunmap_local(). Calling this function is only
+ * required by clients that manage their buffer mappings by themselves.
+ */
+void drm_client_buffer_vunmap_local(struct drm_client_buffer *buffer)
+{
+	struct drm_gem_object *gem = buffer->gem;
+	struct iosys_map *map = &buffer->map;
+
+	drm_gem_vunmap(gem, map);
+	drm_gem_unlock(gem);
+}
+EXPORT_SYMBOL(drm_client_buffer_vunmap_local);
+
+/**
  * drm_client_buffer_vmap - Map DRM client buffer into address space
  * @buffer: DRM client buffer
  * @map_copy: Returns the mapped memory's address
@@ -328,24 +388,30 @@ int
 drm_client_buffer_vmap(struct drm_client_buffer *buffer,
 		       struct iosys_map *map_copy)
 {
+	struct drm_gem_object *gem = buffer->gem;
 	struct iosys_map *map = &buffer->map;
 	int ret;
 
-	/*
-	 * FIXME: The dependency on GEM here isn't required, we could
-	 * convert the driver handle to a dma-buf instead and use the
-	 * backend-agnostic dma-buf vmap support instead. This would
-	 * require that the handle2fd prime ioctl is reworked to pull the
-	 * fd_install step out of the driver backend hooks, to make that
-	 * final step optional for internal users.
-	 */
-	ret = drm_gem_vmap_unlocked(buffer->gem, map);
+	drm_gem_lock(gem);
+
+	ret = drm_gem_pin_locked(gem);
 	if (ret)
-		return ret;
+		goto err_drm_gem_pin_locked;
+	ret = drm_gem_vmap(gem, map);
+	if (ret)
+		goto err_drm_gem_vmap;
+
+	drm_gem_unlock(gem);
 
 	*map_copy = *map;
 
 	return 0;
+
+err_drm_gem_vmap:
+	drm_gem_unpin_locked(buffer->gem);
+err_drm_gem_pin_locked:
+	drm_gem_unlock(gem);
+	return ret;
 }
 EXPORT_SYMBOL(drm_client_buffer_vmap);
 
@@ -359,9 +425,13 @@ EXPORT_SYMBOL(drm_client_buffer_vmap);
  */
 void drm_client_buffer_vunmap(struct drm_client_buffer *buffer)
 {
+	struct drm_gem_object *gem = buffer->gem;
 	struct iosys_map *map = &buffer->map;
 
-	drm_gem_vunmap_unlocked(buffer->gem, map);
+	drm_gem_lock(gem);
+	drm_gem_vunmap(gem, map);
+	drm_gem_unpin_locked(gem);
+	drm_gem_unlock(gem);
 }
 EXPORT_SYMBOL(drm_client_buffer_vunmap);