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authorArchit Taneja <archit@ti.com>2014-04-11 12:53:31 +0530
committerTomi Valkeinen <tomi.valkeinen@ti.com>2014-04-15 13:35:28 +0300
commitf2cff0f34ff2c51f703880a2b883ea0c9de4a5ac (patch)
tree2144c9cbb81a5b60746632763a67ba9f6dd0238f /drivers/gpu
parent15ec2ca964d7a52e7e0a452fe0f9c409d2f3eec6 (diff)
downloadop-kernel-dev-f2cff0f34ff2c51f703880a2b883ea0c9de4a5ac.zip
op-kernel-dev-f2cff0f34ff2c51f703880a2b883ea0c9de4a5ac.tar.gz
drm/omap: gem sync: wait on correct events
A waiter of the type OMAP_GEM_READ should wait for a buffer to be completely written, and only then proceed with reading it. A similar logic applies for waiters with OMAP_GEM_WRITE flag. Currently the function is_waiting() waits on the read_complete/read_target counts in the sync object. This should be the other way round, as a reader should wait for users who are 'writing' to this buffer, and vice versa. Make readers of the buffer(OMAP_GEM_READ) wait on the write counters, and writers to the buffer(OMAP_GEM_WRITE) wait on the read counters in is_waiting() Signed-off-by: Archit Taneja <archit@ti.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/omapdrm/omap_gem.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c
index 9a68e9a2..95dbce2 100644
--- a/drivers/gpu/drm/omapdrm/omap_gem.c
+++ b/drivers/gpu/drm/omapdrm/omap_gem.c
@@ -1047,10 +1047,10 @@ static inline bool is_waiting(struct omap_gem_sync_waiter *waiter)
{
struct omap_gem_object *omap_obj = waiter->omap_obj;
if ((waiter->op & OMAP_GEM_READ) &&
- (omap_obj->sync->read_complete < waiter->read_target))
+ (omap_obj->sync->write_complete < waiter->write_target))
return true;
if ((waiter->op & OMAP_GEM_WRITE) &&
- (omap_obj->sync->write_complete < waiter->write_target))
+ (omap_obj->sync->read_complete < waiter->read_target))
return true;
return false;
}
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