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amdgpu/dc: convert dc_gamma to kref reference counting.

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Rolling your own reference counting is frowned upon.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Dave Airlie 2017-10-03 12:38:58 +10:00 committed by Alex Deucher
parent 9305213256
commit 5c58ab0bd6
2 changed files with 10 additions and 13 deletions
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19
drivers/gpu/drm/amd/display/dc/core/dc_surface.c
View File

@ -129,18 +129,18 @@ void dc_plane_state_release(struct dc_plane_state *plane_state)
void dc_gamma_retain(struct dc_gamma *gamma)
{
ASSERT(atomic_read(&gamma->ref_count) > 0);
atomic_inc(&gamma->ref_count);
kref_get(&gamma->refcount);
}
static void dc_gamma_free(struct kref *kref)
{
struct dc_gamma *gamma = container_of(kref, struct dc_gamma, refcount);
kfree(gamma);
}
void dc_gamma_release(struct dc_gamma **gamma)
{
ASSERT(atomic_read(&(*gamma)->ref_count) > 0);
atomic_dec(&(*gamma)->ref_count);
if (atomic_read(&(*gamma)->ref_count) == 0)
kfree((*gamma));
kref_put(&(*gamma)->refcount, dc_gamma_free);
*gamma = NULL;
}
@ -151,8 +151,7 @@ struct dc_gamma *dc_create_gamma()
if (gamma == NULL)
goto alloc_fail;
atomic_inc(&gamma->ref_count);
kref_init(&gamma->refcount);
return gamma;
alloc_fail:

4
drivers/gpu/drm/amd/display/dc/dc_hw_types.h
View File

@ -420,6 +420,7 @@ enum dc_gamma_type {
};
struct dc_gamma {
struct kref refcount;
enum dc_gamma_type type;
unsigned int num_entries;
@ -431,9 +432,6 @@ struct dc_gamma {
/* private to DC core */
struct dc_context *ctx;
/* private to dc_surface.c */
atomic_t ref_count;
};
/* Used by both ipp amd opp functions*/