linux-kernel - [PATCH] ALSA: hda: Add AZX_DCAPS_PM

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Message-Id: <20180628072824.12507-1-kai.heng.feng@canonical.com>
Date:   Thu, 28 Jun 2018 15:28:24 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     tiwai@...e.com
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Vijendar Mukunda <Vijendar.Mukunda@....com>
Subject: [PATCH] ALSA: hda: Add AZX_DCAPS_PM_RUNTIME for AMD Raven Ridge

This patch can make audio controller in AMD Raven Ridge gets runtime
suspended to D3, to save ~1W power when it's not in use.

Cc: Vijendar Mukunda <Vijendar.Mukunda@....com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
---
 sound/pci/hda/hda_intel.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 1ae1850b3bfd..a9b55d65f2bd 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2535,7 +2535,8 @@ static const struct pci_device_id azx_ids[] = {
 	  .driver_data = AZX_DRIVER_GENERIC | AZX_DCAPS_PRESET_ATI_SB },
 	/* AMD Raven */
 	{ PCI_DEVICE(0x1022, 0x15e3),
-	  .driver_data = AZX_DRIVER_GENERIC | AZX_DCAPS_PRESET_ATI_SB },
+	  .driver_data = AZX_DRIVER_GENERIC | AZX_DCAPS_PRESET_ATI_SB |
+			 AZX_DCAPS_PM_RUNTIME },
 	/* ATI HDMI */
 	{ PCI_DEVICE(0x1002, 0x0002),
 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
-- 
2.17.1