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Commit 94477bff authored by Sinclair Yeh's avatar Sinclair Yeh
Browse files

drm/ttm: Make ttm_bo_mem_compat available 



There are cases where it is desired to see if a proposed placement
is compatible with a buffer object before calling ttm_bo_validate().

Signed-off-by: default avatarSinclair Yeh <syeh@vmware.com>
Reviewed-by: default avatarThomas Hellstrom <thellstrom@vmware.com>
Cc: <stable@vger.kernel.org>
---
This is the first of a 3-patch series to fix a black screen
issue observed on Ubuntu 16.04 server.
parent 04319d89

drivers/gpu/drm/ttm/ttm_bo.c

+4 −3
Original line number Diff line number Diff line
@@ -1034,7 +1034,7 @@ static int ttm_bo_move_buffer(struct ttm_buffer_object *bo, 
	return ret;

}



static bool ttm_bo_mem_compat(struct ttm_placement *placement,

bool ttm_bo_mem_compat(struct ttm_placement *placement,

		       struct ttm_mem_reg *mem,

		       uint32_t *new_flags)

{
@@ -1068,6 +1068,7 @@ static bool ttm_bo_mem_compat(struct ttm_placement *placement, 


	return false;

}

EXPORT_SYMBOL(ttm_bo_mem_compat);



int ttm_bo_validate(struct ttm_buffer_object *bo,

			struct ttm_placement *placement,

include/drm/ttm/ttm_bo_api.h

+14 −0
Original line number Diff line number Diff line
@@ -316,6 +316,20 @@ ttm_bo_reference(struct ttm_buffer_object *bo) 
 */

extern int ttm_bo_wait(struct ttm_buffer_object *bo,

		       bool interruptible, bool no_wait);



/**

 * ttm_bo_mem_compat - Check if proposed placement is compatible with a bo

 *

 * @placement:  Return immediately if buffer is busy.

 * @mem:  The struct ttm_mem_reg indicating the region where the bo resides

 * @new_flags: Describes compatible placement found

 *

 * Returns true if the placement is compatible

 */

extern bool ttm_bo_mem_compat(struct ttm_placement *placement,

			      struct ttm_mem_reg *mem,

			      uint32_t *new_flags);



/**

 * ttm_bo_validate

 *