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gpu: host1x: Export host1x_syncpt_read() 

This function is used to read the current value of the syncpt and is
useful in situations where drivers don't schedule work and wait for the
syncpoint to increment. One particular use-case is using the syncpoint
as a VBLANK counter.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2015-01-28 14:29:02 +01:00
parent dab163366a
commit b4a20144e0
2 changed files with 7 additions and 0 deletions
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6
drivers/gpu/host1x/syncpt.c
View File

@ -425,6 +425,12 @@ u32 host1x_syncpt_read_min(struct host1x_syncpt *sp)
}
EXPORT_SYMBOL(host1x_syncpt_read_min);
u32 host1x_syncpt_read(struct host1x_syncpt *sp)
{
return host1x_syncpt_load(sp);
}
EXPORT_SYMBOL(host1x_syncpt_read);
int host1x_syncpt_nb_pts(struct host1x *host)
{
return host->info->nb_pts;

1
include/linux/host1x.h
View File

@ -135,6 +135,7 @@ struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, u32 id);
u32 host1x_syncpt_id(struct host1x_syncpt *sp);
u32 host1x_syncpt_read_min(struct host1x_syncpt *sp);
u32 host1x_syncpt_read_max(struct host1x_syncpt *sp);
u32 host1x_syncpt_read(struct host1x_syncpt *sp);
int host1x_syncpt_incr(struct host1x_syncpt *sp);
u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs);
int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,