Hi Takashi, > -----Original Message----- > From: Takashi Iwai [mailto:tiwai at suse.de] > Sent: Thursday, May 23, 2013 2:03 PM > To: Wang Xingchao > Cc: daniel at ffwll.ch; alsa-devel at alsa-project.org; > intel-gfx at lists.freedesktop.org; david.henningsson at canonical.com; Girdwood, > Liam R; Li, Jocelyn; Wang, Xingchao > Subject: Re: [PATCH 3/4] ALSA: hda - Fix runtime PM check > > At Thu, 23 May 2013 01:04:15 +0800, > Wang Xingchao wrote: > > > > The device can support runtime PM no matter whether it support signal > > wakeup or not. For some chips like Haswell which doesnot support PME > > by default, this patch let haswell Display HD-A controller enter > > runtime suspend, and bring more power saving whith power-well feature > > enabled. > > Signed-off-by: Wang Xingchao <xingchao.wang at linux.intel.com> > > This change has nothing to do with the power well fix, thus no reason to put in > the series. But power-well feature depends on HD-A controller's power-save enabling, without this patch, Power-well would not be shutdown automatically, thus cause more power. So I thought it should be part of the patchset. Anyway it's a more general fix not only for Haswell, so better to leave it alone. I will split it from the patchset in next version. Thanks --xingchao > > > Takashi > > > --- > > sound/pci/hda/hda_intel.c | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c > > index 54c7c22..f20a88c 100644 > > --- a/sound/pci/hda/hda_intel.c > > +++ b/sound/pci/hda/hda_intel.c > > @@ -3755,7 +3755,7 @@ static int azx_probe(struct pci_dev *pci, > > goto out_free_power; > > } > > > > - if (pci_dev_run_wake(pci)) > > + if (chip->driver_caps & AZX_DCAPS_PM_RUNTIME) > > pm_runtime_put_noidle(&pci->dev); > > > > dev++; > > @@ -3834,7 +3834,7 @@ static void azx_remove(struct pci_dev *pci) > > struct snd_card *card = pci_get_drvdata(pci); > > struct azx *chip = card->private_data; > > > > - if (pci_dev_run_wake(pci)) > > + if (chip->driver_caps & AZX_DCAPS_PM_RUNTIME) > > pm_runtime_get_noresume(&pci->dev); > > > > if (card) > > -- > > 1.8.1.2 > >
