Bug in HVR1300. Found part of a patch, if reverted bug seems to be gone

[Frank Sagurna <frank@sagurna.de>]

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Hi list,

there seems to be a bug in cx88 (HVR1300) that is responsible for not
switching channels, and not being able to scan.
Complete description can be found on launchpad:

https://bugs.launchpad.net/mythtv/+bug/439163 (starting from comment #16)

Anyway, i digged it down to this patch:
http://www.mail-archive.com/linuxtv-commits@linuxtv.org/msg02195.html

When reverting the following part of the patch it starts working again:

snip----------

diff -r 576096447a45 -r d2eedb425718
linux/drivers/media/video/cx88/cx88-dvb.c
- --- a/linux/drivers/media/video/cx88/cx88-dvb.c Thu Dec 18 07:28:18 2008
- -0200
+++ b/linux/drivers/media/video/cx88/cx88-dvb.c Thu Dec 18 07:28:35 2008
- -0200
@@ -1135,40 +1135,44 @@ static int cx8802_dvb_advise_acquire(str
                 * on the bus. Take the bus from the cx23416 and enable the
                 * cx22702 demod
                 */
- - cx_set(MO_GP0_IO, 0x00000080); /* cx22702 out of reset and
enable */
+ /* Toggle reset on cx22702 leaving i2c active */
+ cx_set(MO_GP0_IO, 0x00000080);
+ udelay(1000);
+ cx_clear(MO_GP0_IO, 0x00000080);
+ udelay(50);
+ cx_set(MO_GP0_IO, 0x00000080);
+ udelay(1000);
+ /* enable the cx22702 pins */
                cx_clear(MO_GP0_IO, 0x00000004);
                udelay(1000);
                break;
- ---------snip

Regards

Frank Sagurna


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