V4L/DVB (7938): pvrusb2: Increase enforced encoder wait delay to improve reliability

The driver enforces a "quiet period" on the encoder in certain
situations before attempting to operate it.  This seems to help avoid
video encoding errors / corruption.  The quiet period was 50msec, but
through experimentation it has been observed to improve further if the
interval is increased to 100msec.

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index d4d57951cca2..f30e13f6ee74 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -44,8 +44,10 @@
 #define TIME_MSEC_DECODER_WAIT 50
 
 /* This defines a minimum interval that the encoder must remain quiet
-   before we are allowed to configure it. */
-#define TIME_MSEC_ENCODER_WAIT 50
+   before we are allowed to configure it.  I had this originally set to
+   50msec, but Martin Dauskardt <martin.dauskardt@gmx.de> reports that
+   things work better when it's set to 100msec. */
+#define TIME_MSEC_ENCODER_WAIT 100
 
 /* This defines the minimum interval that the encoder must successfully run
    before we consider that the encoder has run at least once since its