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

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

[Frank Sagurna]

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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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Re: Bug in HVR1300. Found part of a patch, if reverted bug seems to be gone [spam-bayes][heur][spf]

[Steven Toth]

On Mon, Oct 12, 2009 at 4:48 PM, Frank Sagurna <frank@sagurna.de> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> 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----------

Thanks Frank. I'll pick up this patch and start the merge process.

Regards,

- Steve

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

[Steven Toth]

> 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:

Noted.

Thanks

-- 
Steven Toth - Kernel Labs
http://www.kernellabs.com