On Jan 27, 2008 7:58 AM, Timothy E. Krantz <[EMAIL PROTECTED]> wrote:
> > Hi, all, > > > > This patch improves the performance of the xc5000 tuner driver. > > > > 1. Now, only one xc5000_priv struct is used for each physical tuner > > instead of one for each attach (analog/digital). This > > avoids potential > > inconsistence such as the status of the firmware loading changed by > > one instance of the driver and the other instance not > > being aware of it. > > It is based on the tuner-xc2028.c code. > > > > 2. Removed a layer of function call for xc_reset(). > > > > 3. Replaced all calls to xc_wait() by a direct msleep() call > > (which is all > > xc_wait does). > > > > 4. Changed the xc_wait(100) in xc_write_reg() to msleep(5). > > The comment > > says wait 5 ms, was the 100 a typo? In any case, this improved the > > tuner performace greatly (much faster lock). > > > > 5. Added a module parameter "allow_shutdown", which is defaulted to 0. > > If enabled, the xc5000_sleep() function will indeed shutdown the > > tuner device. On the 800i, this is fine with analog, but digital > > still cannot get a lock after shutdown and reinitialized, with no > > apparent error message. Please test this on other cards. > > > > 6. Some minor clean up. > > > > The patch is tested on the Pinnacle 800i. Before the patch, > > tvtime and azap works with analog/digital tv, but with very > > slow tuning and locking. Mythtv had problems with analog tv > > frequently (with the "errors are encountered during video > > play back" message). Most likely, that was due to the slow > > tuning of the xc5000. > > > > After the patch, both analog and digital tv saw great improvements. > > Mythtv can consistently lock in both analog and digital > > channels. I haven't run into the video play back errors yet > > so far after torturing mythtv with channel changing and > > switching between different input source/multiple cards > > several dozen times. > > > > I still could not get audio (analog) in mythtv, but I suspect > > that is a problem with my mythtv setup rather than the driver. > > > > Comments are welcome and please test and post your experience. Thanks! > > Sir, > Prior to your patch when using my 800i each time I tried to go from an > analog to a digital station or vice versa using mythtv I got the "errors > encountered during video playback" issue. > > With this patch installed going from analog to digital works fine for me > but > switching from digital to analog still results in the same error. > > Channel lock is MUCH faster. > > Thanks for your efforts! > > Tim > > I apologize for being a newbie, but how does one apply a patch like this? It seems like you are supposed to run a patch command, but I can't figure out how to get it to run correctly. Thanks John
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