On Tue, 19 May 2009 09:46:40 +0300 Peter Ujfalusi peter.ujfalusi@nokia.com wrote:
On Monday 18 May 2009 18:28:52 ext Aggarwal, Anuj wrote:
[Aggarwal, Anuj] I tried this on OMAP3 EVM. Ramp delay values 0-3 produces minor glitches in the beginning & end, value 4 gave me the best result so far on my EVM, I will try with some other EVMs as well before finalizing it. 5 and others produce a beep in the beginning and end. Just one question, is there any side-effect of choosing a large ramp delay? For e.g. in my case, it could be 437ms (19.2MHz clock).
It is less than half a second ;) I'm not sure, but we could try later to add a timer to finish up the ramp- down. There could be (not foreseen) side effects... At this point I think this (series) is a good start and it is better than what we had.
For my Beagle the power-up/-down low-frequency pop goes more silent as the ramp time increases. Sharp power-down snap is there with '27/20/14 ms' and '55/40/27 ms' but not times above.
Beep sound is here when ramp is '109/81/55 ms' and above. As ramp time increases, the beep sound frequency goes down. Codec HW issue?
I don't have any objections to these two patches and as the music still plays fine so probably these can be pushed in safely.