On Mon, 2009-06-01 at 17:20 +0200, Patch from Mauro Carvalho Chehab
wrote:
The patch number 11917 was added via Mauro Carvalho Chehab
mche...@redhat.com
to http://linuxtv.org/hg/v4l-dvb master development tree.
Kernel patches in this development tree may be modified to be backward
compatible with older kernels. Compatibility modifications will be
removed before inclusion into the mainstream Kernel
If anyone has any objections, please let us know by sending a message to:
Linux Media Mailing List linux-media@vger.kernel.org
--
From: Mauro Carvalho Chehab mche...@redhat.com
Fix firmware load for DVB-T @ 6MHz
bandwidth for xc3028/xc3028L
The only two countries that are known to use 6MHz bandwidth are Taiwan
and Uruguay. Both use QAM subcarriers at OFTM.
This patch fixes the firmware load for such countries, where the
required firmware is the QAM one.
This also confirms the previous tests where it was noticed that the 6MHz
QAM firmware doesn't work for cable. So, this patch also removes support
for DVB-C, instead of just printing a warning.
Thanks to Terry Wu terrywu2...@gmail.com for pointing this issue and
to Andy Walls awa...@radix.net for an initial patch for this fix.
Priority: normal
CC: Terry Wu terrywu2...@gmail.com
CC: Andy Walls awa...@radix.net
Signed-off-by: Mauro Carvalho Chehab mche...@redhat.com
Acked-by: Andy Walls awa...@radix.net
I looks like it accomplishes the 6 MHz DVB-T support in
xc2028_set_params() that Terry needed. I personally wouldn't have
disabled the FE_QAM stuff. However it doesn't matter as far as current
Linux driver use of the XC3028 is concerned - no driver currently sets
up the XC3028 with a DVB-C demod.
Regards,
Andy
---
linux/drivers/media/common/tuners/tuner-xc2028.c | 17 +++
1 file changed, 8 insertions(+), 9 deletions(-)
diff -r d55ec37bebfa -r c78c18fe3dc9
linux/drivers/media/common/tuners/tuner-xc2028.c
--- a/linux/drivers/media/common/tuners/tuner-xc2028.cMon Jun 01
05:22:37 2009 -0300
+++ b/linux/drivers/media/common/tuners/tuner-xc2028.cMon Jun 01
11:46:08 2009 -0300
@@ -1026,21 +1026,20 @@ static int xc2028_set_params(struct dvb_
switch(fe-ops.info.type) {
case FE_OFDM:
bw = p-u.ofdm.bandwidth;
- break;
- case FE_QAM:
- tuner_info(WARN: There are some reports that
-QAM 6 MHz doesn't work.\n
-If this works for you, please report by
-e-mail to: v4l-dvb-maintai...@linuxtv.org\n);
- bw = BANDWIDTH_6_MHZ;
- type |= QAM;
+ /*
+ * The only countries with 6MHz seem to be Taiwan/Uruguay.
+ * Both seem to require QAM firmware for OFDM decoding
+ * Tested in Taiwan by Terry Wu terrywu2...@gmail.com
+ */
+ if (bw == BANDWIDTH_6_MHZ)
+ type |= QAM;
break;
case FE_ATSC:
bw = BANDWIDTH_6_MHZ;
/* The only ATSC firmware (at least on v2.7) is D2633 */
type |= ATSC | D2633;
break;
- /* DVB-S is not supported */
+ /* DVB-S and pure QAM (FE_QAM) are not supported */
default:
return -EINVAL;
}
---
Patch is available at:
http://linuxtv.org/hg/v4l-dvb/rev/c78c18fe3dc9f1338a589130c4eeed14c1d90b44
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