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Subject: media: cx231xx: Increase USB bridge bandwidth
Author: Brad Love <b...@nextdimension.cc>
Date: Mon Apr 2 15:59:01 2018 -0400
The cx231xx USB bridge has issue streaming QAM256 DVB-C channels.
QAM64 channels were fine, but QAM256 channels produced corrupted
transport streams.
cx231xx alt mode 4 does not provide enough bandwidth to acommodate
QAM256 DVB-C channels, most likely DVB-T2 channels would break up
as well. Alt mode 5 increases bridge bandwidth to 90Mbps, and
fixes QAM256 DVB-C streaming.
Signed-off-by: Brad Love <b...@nextdimension.cc>
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
drivers/media/usb/cx231xx/cx231xx-dvb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/drivers/media/usb/cx231xx/cx231xx-dvb.c
b/drivers/media/usb/cx231xx/cx231xx-dvb.c
index 713029420fcf..67ed66712d05 100644
--- a/drivers/media/usb/cx231xx/cx231xx-dvb.c
+++ b/drivers/media/usb/cx231xx/cx231xx-dvb.c
@@ -276,7 +276,7 @@ static int start_streaming(struct cx231xx_dvb *dvb)
if (dev->USE_ISO) {
dev_dbg(dev->dev, "DVB transfer mode is ISO.\n");
- cx231xx_set_alt_setting(dev, INDEX_TS1, 4);
+ cx231xx_set_alt_setting(dev, INDEX_TS1, 5);
rc = cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
if (rc < 0)
return rc;
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