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authorAndy Walls <awalls@radix.net>2009-12-24 13:06:08 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-02-26 15:10:41 -0300
commit3ccc646b56a3f03029a259c6a8affd9cecc6020e (patch)
tree28acf2a154c4792a1af091d778ab39385d56f9de /drivers/media/video/pvrusb2
parentb6e436b263b35476da4be06e0719cb1d5c8f8eed (diff)
downloadlinux-2.6.38-lt-ux500-3ccc646b56a3f03029a259c6a8affd9cecc6020e.tar.gz
V4L/DVB: cx25840, v4l2-subdev, ivtv, pvrusb2: Fix ivtv/cx25840 tinny audio
This change attempts to fix the ivtv tinny audio problem by keeping digitizer to encoder audio clocks running, while disabling the video clocks as needed to avoid unpredictable PCI bus hangs. To accomplish this, for the cx25840 module enabling of audio streaming had to be separated from enabling video streaming, requiring an additional v4l2_subdev_audio_op and calls to this new op in the pvrusb2 and ivtv drivers. The cx231xx and cx23885 driver use the cx25840 module for affecting only video on s_stream calls, so those drivers needed no change. The CX23418 hardware does not exhibit either the tinny audio problem nor the PCI bus hang, so the cx18 driver did not need corresponding changes. CX2341[56] based cards that are not using the CX2584x family of chips do not seem to be affected by the tinny audio problem, and this change should not affect how they are configured. It will delay their first capture by starting by another 300 msec though. Many thanks go to Argus <pthorn-ivtvd@styx2002.no-ip.org> and Martin Dauskardt <martin.dauskardt@gmx.de> whose persistent testing and investigation of this problem will hopefully fix this problem once and for all for many ivtv users. Reported-by: Martin Dauskardt <martin.dauskardt@gmx.de> Reported-by: Argus <pthorn-ivtvd@styx2002.no-ip.org> Signed-off-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/pvrusb2')
-rw-r--r--drivers/media/video/pvrusb2/pvrusb2-hdw.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index 1bbdab08fe0..ad9ed51f7b9 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -1705,6 +1705,7 @@ static int pvr2_decoder_enable(struct pvr2_hdw *hdw,int enablefl)
pvr2_trace(PVR2_TRACE_CHIPS, "subdev v4l2 stream=%s",
(enablefl ? "on" : "off"));
v4l2_device_call_all(&hdw->v4l2_dev, 0, video, s_stream, enablefl);
+ v4l2_device_call_all(&hdw->v4l2_dev, 0, audio, s_stream, enablefl);
if (hdw->decoder_client_id) {
/* We get here if the encoder has been noticed. Otherwise
we'll issue a warning to the user (which should