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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: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas 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.
hifive-unleashed-5.1
Sinclair Yeh 2016-06-29 12:58:49 -07:00
parent 04319d89fb
commit 94477bff39
2 changed files with 18 additions and 3 deletions
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7
drivers/gpu/drm/ttm/ttm_bo.c
View File

@ -1034,9 +1034,9 @@ out_unlock:
return ret;
}
static bool ttm_bo_mem_compat(struct ttm_placement *placement,
struct ttm_mem_reg *mem,
uint32_t *new_flags)
bool ttm_bo_mem_compat(struct ttm_placement *placement,
struct ttm_mem_reg *mem,
uint32_t *new_flags)
{
int i;
@ -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,

14
include/drm/ttm/ttm_bo_api.h
View File

@ -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
*