Hi Takashi, Am So den 8. Dez 2019 um 9:45 schrieb Takashi Iwai: > On Sat, 07 Dec 2019 21:06:43 +0100, > > Find attached the perf output of the relevant event handler. > > Thanks. So it seems wasting in the busy loop for waiting for the > response from the codec. > > How about a patch below? It's untested, might break things, but at > least avoiding a busy loop. I'll give it a try. Kernel is compiling right now. It might be hard to see if the patch is working but I suppose that it do when I don't have that trouble within a week or so. > BTW, if your machine is Coffeelake or Cannonlake, this patch wont' > work on the old branch because of forced polling mode. It was removed > in 5.5-rc1, so please test with Linus tree at best. I hardly have such new Architectures on that laptop. It is a lenovo x61s so it is from latest 2009. It has a Intel Core 2 Duo LV (Merom). :-) I actually check it with gentoo kernel source 5.4.2. Regards Klaus -- Klaus Ethgen http://www.ethgen.ch/ pub 4096R/4E20AF1C 2011-05-16 Klaus Ethgen <Klaus@xxxxxxxxx> Fingerprint: 85D4 CA42 952C 949B 1753 62B3 79D0 B06F 4E20 AF1C
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