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ALSA: x86: Don't enable runtime PM as default

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Unlike HSW and newer, BYT/CHT devices have no fine control of audio
power domain in i915 side.  Since there is little gain by runtime PM
on BYT/CHT, so far, this commit removes the pm_runtime_enable() call
as default.

User who still wants the runtime PM may adjust the corresponding
sysfs files (power/control and power/autosuspend_delay_ms)
appropriately, of course.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2017-02-21 22:18:57 +01:00
parent 3002b9fb7c
commit 0b6b524f39
1 changed files with 4 additions and 2 deletions
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6
sound/x86/intel_hdmi_audio.c
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@ -1809,11 +1809,13 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev)
pdata->notify_pending = false;
spin_unlock_irq(&pdata->lpe_audio_slock);
/* runtime PM isn't enabled as default, since it won't save much on
* BYT/CHT devices; user who want the runtime PM should adjust the
* power/ontrol and power/autosuspend_delay_ms sysfs entries instead
*/
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_mark_last_busy(&pdev->dev);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
dev_dbg(&pdev->dev, "%s: handle pending notification\n", __func__);
schedule_work(&ctx->hdmi_audio_wq);