>-----Original Message----- >From: alsa-devel-bounces@xxxxxxxxxxxxxxxx [mailto:alsa-devel-bounces@alsa- >project.org] On Behalf Of Takashi Iwai >Sent: Wednesday, March 21, 2018 2:45 PM >To: alsa-devel@xxxxxxxxxxxxxxxx >Cc: Hui Wang <hui.wang@xxxxxxxxxxxxx> >Subject: [PATCH] ALSA: hda - Force polling mode on CFL for fixing >codec communication > >We've observed too long probe time with Coffee Lake machines, and the >likely cause is some communication problem between the HD-audio >controller and the codec chips. While the controller expects an IRQ >wakeup for each codec response, it seems sometimes missing, and it >takes one second for the controller driver to time out and read the >response in the polling mode. > I think I faced similar problem while doing the HDA ASoC work. I don't have any way to reproduce and test this. Can we increase the delay after the link is powered ON. The present delay is 100usec, can we make it 521 uSec ? Possibly the codec is not ready after the link is powered on and so it's not responding. File: hda_intel.c /* 4. turn link up: set SPA to 1 and wait CPA to 1 */ intel_ml_lctl_set_power(chip, 1); udelay(100); --> change this to 521. Regards, Rakesh _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
