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@linux.intel.com --- sound/pci/hda/hda_intel.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 418bfc0..cf3d36c 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -3091,8 +3091,13 @@ static int register_vga_switcheroo(struct azx *chip) */ static int azx_free(struct azx *chip) { + struct pci_dev *pci = chip->pci; int i;
+ if ((chip->driver_caps & AZX_DCAPS_PM_RUNTIME) + && chip->running) + pm_runtime_get_noresume(&pci->dev); + azx_del_card_list(chip);
azx_notifier_unregister(chip); @@ -3726,9 +3731,6 @@ static int azx_probe(struct pci_dev *pci, goto out_free; }
- if (pci_dev_run_wake(pci)) - pm_runtime_put_noidle(&pci->dev); - dev++; complete_all(&chip->probe_wait); return 0; @@ -3741,6 +3743,7 @@ out_free:
static int azx_probe_continue(struct azx *chip) { + struct pci_dev *pci = chip->pci; int dev = chip->dev_index; int err;
@@ -3788,6 +3791,8 @@ static int azx_probe_continue(struct azx *chip) power_down_all_codecs(chip); azx_notifier_register(chip); azx_add_card_list(chip); + if (chip->driver_caps & AZX_DCAPS_PM_RUNTIME) + pm_runtime_put_noidle(&pci->dev);
return 0;
@@ -3800,9 +3805,6 @@ static void azx_remove(struct pci_dev *pci) { struct snd_card *card = pci_get_drvdata(pci);
- if (pci_dev_run_wake(pci)) - pm_runtime_get_noresume(&pci->dev); - if (card) snd_card_free(card); pci_set_drvdata(pci, NULL);