lkml.org 
[lkml]   [2018]   [Mar]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3.18 44/47] drm/omap: DMM: Check for DMM readiness after successful transaction commit
Date
3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Peter Ujfalusi <peter.ujfalusi@ti.com>


[ Upstream commit b7ea6b286c4051e043f691781785e3c4672f014a ]

Check the status of the DMM engine after it is reported that the
transaction was completed as in rare cases the engine might not reached a
working state.

The wait_status() will print information in case the DMM is not reached the
expected state and the dmm_txn_commit() will return with an error code to
make sure that we are not continuing with a broken setup.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/omapdrm/omap_dmm_tiler.c | 5 +++++
1 file changed, 5 insertions(+)

--- a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
+++ b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
@@ -280,7 +280,12 @@ static int dmm_txn_commit(struct dmm_txn
msecs_to_jiffies(1)) <= 0) {
dev_err(dmm->dev, "timed out waiting for done\n");
ret = -ETIMEDOUT;
+ goto cleanup;
}
+
+ /* Check the engine status before continue */
+ ret = wait_status(engine, DMM_PATSTATUS_READY |
+ DMM_PATSTATUS_VALID | DMM_PATSTATUS_DONE);
}

cleanup:

\
 
 \ /
  Last update: 2018-03-23 11:24    [W:0.115 / U:4.656 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site