V4L: pvrusb2: Keep MPEG PTSs from drifting away

cherry picked from commit 3f93d1adca658201c64251c43a147cc79d468c3f

V4L: pvrusb2: Keep MPEG PTSs from drifting away

This change was empirically figured out by Boris Dores after
empirically comparing against behavior in the Windows driver.

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/media/video/pvrusb2/pvrusb2-encoder.c b/drivers/media/video/pvrusb2/pvrusb2-encoder.c
index a1252d673b411331e36811dac8cdea5d65e052f4..273d2a1aa220f0b8a42ad41ae9722dd3c299de5c 100644 (file)
--- a/drivers/media/video/pvrusb2/pvrusb2-encoder.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-encoder.c
@@ -402,6 +402,10 @@ static int pvr2_encoder_prep_config(struct pvr2_hdw *hdw)
        ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 0,3,0,0);
        ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4,15,0,0,0);
 
+       /* prevent the PTSs from slowly drifting away in the generated
+          MPEG stream */
+       ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC, 2, 4, 1);
+
        return ret;
 }