Merge tag 'drm-misc-next-2021-10-06' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for v5.16:

UAPI Changes:
- Allow empty drm leases for creating separate GEM namespaces.

Cross-subsystem Changes:
- Slightly rework dma_buf_poll.
- Add dma_resv_for_each_fence_unlocked to iterate, and use it inside
  the lockless dma-resv functions.

Core Changes:
- Allow devm_drm_of_get_bridge to build without CONFIG_OF for compile testing.
- Add more DP2 headers.
- fix CONFIG_FB dependency in fb_helper.
- Add DRM_FORMAT_R8 to drm_format_info, and helpers for RGB332 and RGB888.
- Fix crash on a 0 or invalid EDID.

Driver Changes:
- Apply and revert DRM_MODESET_LOCK_ALL_BEGIN.
- Add mode_valid to ti-sn65dsi86 bridge.
- Support multiple syncobjs in v3d.
- Add R8, RGB332 and RGB888 pixel formats to GUD.
- Use devm_add_action_or_reset in dw-hdmi-cec.

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

# gpg: Signature made Wed 06 Oct 2021 20:48:12 AEST
# gpg:                using RSA key B97BD6A80CAC4981091AE547FE558C72A67013C3
# gpg: Good signature from "Maarten Lankhorst <maarten.lankhorst@linux.intel.com>" [expired]
# gpg:                 aka "Maarten Lankhorst <maarten@debian.org>" [expired]
# gpg:                 aka "Maarten Lankhorst <maarten.lankhorst@canonical.com>" [expired]
# gpg: Note: This key has expired!
# Primary key fingerprint: B97B D6A8 0CAC 4981 091A  E547 FE55 8C72 A670 13C3
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/2602f4e9-a8ac-83f8-6c2a-39fd9ca2e1ba@linux.intel.com

1 files changed, 58 insertions, 24 deletions

diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h
index 89b15d673b22..f20832139815 100644
--- a/include/drm/ttm/ttm_tt.h
+++ b/include/drm/ttm/ttm_tt.h
@@ -38,36 +38,70 @@ struct ttm_resource;
 struct ttm_buffer_object;
 struct ttm_operation_ctx;
 
-#define TTM_PAGE_FLAG_SWAPPED         (1 << 4)
-#define TTM_PAGE_FLAG_ZERO_ALLOC      (1 << 6)
-#define TTM_PAGE_FLAG_SG              (1 << 8)
-#define TTM_PAGE_FLAG_NO_RETRY	      (1 << 9)
-
-#define TTM_PAGE_FLAG_PRIV_POPULATED  (1 << 31)
-
 /**
- * struct ttm_tt
- *
- * @pages: Array of pages backing the data.
- * @page_flags: see TTM_PAGE_FLAG_*
- * @num_pages: Number of pages in the page array.
- * @sg: for SG objects via dma-buf
- * @dma_address: The DMA (bus) addresses of the pages
- * @swap_storage: Pointer to shmem struct file for swap storage.
- * @pages_list: used by some page allocation backend
- * @caching: The current caching state of the pages, see enum ttm_caching.
- *
- * This is a structure holding the pages, caching- and aperture binding
- * status for a buffer object that isn't backed by fixed (VRAM / AGP)
+ * struct ttm_tt - This is a structure holding the pages, caching- and aperture
+ * binding status for a buffer object that isn't backed by fixed (VRAM / AGP)
  * memory.
  */
 struct ttm_tt {
+	/** @pages: Array of pages backing the data. */
 	struct page **pages;
+	/**
+	 * @page_flags: The page flags.
+	 *
+	 * Supported values:
+	 *
+	 * TTM_TT_FLAG_SWAPPED: Set by TTM when the pages have been unpopulated
+	 * and swapped out by TTM.  Calling ttm_tt_populate() will then swap the
+	 * pages back in, and unset the flag. Drivers should in general never
+	 * need to touch this.
+	 *
+	 * TTM_TT_FLAG_ZERO_ALLOC: Set if the pages will be zeroed on
+	 * allocation.
+	 *
+	 * TTM_TT_FLAG_EXTERNAL: Set if the underlying pages were allocated
+	 * externally, like with dma-buf or userptr. This effectively disables
+	 * TTM swapping out such pages.  Also important is to prevent TTM from
+	 * ever directly mapping these pages.
+	 *
+	 * Note that enum ttm_bo_type.ttm_bo_type_sg objects will always enable
+	 * this flag.
+	 *
+	 * TTM_TT_FLAG_EXTERNAL_MAPPABLE: Same behaviour as
+	 * TTM_TT_FLAG_EXTERNAL, but with the reduced restriction that it is
+	 * still valid to use TTM to map the pages directly. This is useful when
+	 * implementing a ttm_tt backend which still allocates driver owned
+	 * pages underneath(say with shmem).
+	 *
+	 * Note that since this also implies TTM_TT_FLAG_EXTERNAL, the usage
+	 * here should always be:
+	 *
+	 *   page_flags = TTM_TT_FLAG_EXTERNAL |
+	 *		  TTM_TT_FLAG_EXTERNAL_MAPPABLE;
+	 *
+	 * TTM_TT_FLAG_PRIV_POPULATED: TTM internal only. DO NOT USE. This is
+	 * set by TTM after ttm_tt_populate() has successfully returned, and is
+	 * then unset when TTM calls ttm_tt_unpopulate().
+	 */
+#define TTM_TT_FLAG_SWAPPED		(1 << 0)
+#define TTM_TT_FLAG_ZERO_ALLOC		(1 << 1)
+#define TTM_TT_FLAG_EXTERNAL		(1 << 2)
+#define TTM_TT_FLAG_EXTERNAL_MAPPABLE	(1 << 3)
+
+#define TTM_TT_FLAG_PRIV_POPULATED  (1 << 31)
 	uint32_t page_flags;
+	/** @num_pages: Number of pages in the page array. */
 	uint32_t num_pages;
+	/** @sg: for SG objects via dma-buf. */
 	struct sg_table *sg;
+	/** @dma_address: The DMA (bus) addresses of the pages. */
 	dma_addr_t *dma_address;
+	/** @swap_storage: Pointer to shmem struct file for swap storage. */
 	struct file *swap_storage;
+	/**
+	 * @caching: The current caching state of the pages, see enum
+	 * ttm_caching.
+	 */
 	enum ttm_caching caching;
 };
 
@@ -85,7 +119,7 @@ struct ttm_kmap_iter_tt {
 
 static inline bool ttm_tt_is_populated(struct ttm_tt *tt)
 {
-	return tt->page_flags & TTM_PAGE_FLAG_PRIV_POPULATED;
+	return tt->page_flags & TTM_TT_FLAG_PRIV_POPULATED;
 }
 
 /**
@@ -104,7 +138,7 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc);
  *
  * @ttm: The struct ttm_tt.
  * @bo: The buffer object we create the ttm for.
- * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+ * @page_flags: Page flags as identified by TTM_TT_FLAG_XX flags.
  * @caching: the desired caching state of the pages
  *
  * Create a struct ttm_tt to back data with system memory pages.
@@ -179,7 +213,7 @@ void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm);
  */
 static inline void ttm_tt_mark_for_clear(struct ttm_tt *ttm)
 {
-	ttm->page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
+	ttm->page_flags |= TTM_TT_FLAG_ZERO_ALLOC;
 }
 
 void ttm_tt_mgr_init(unsigned long num_pages, unsigned long num_dma32_pages);
@@ -195,7 +229,7 @@ struct ttm_kmap_iter *ttm_kmap_iter_tt_init(struct ttm_kmap_iter_tt *iter_tt,
  *
  * @bo: Buffer object we allocate the ttm for.
  * @bridge: The agp bridge this device is sitting on.
- * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+ * @page_flags: Page flags as identified by TTM_TT_FLAG_XX flags.
  *
  *
  * Create a TTM backend that uses the indicated AGP bridge as an aperture