[systemd-devel] [PATCH 1/3] rules: Enable runtime device power management on Intel HDA controllers

[Matthew Garrett]

From: Matthew Garrett <mjg59 at coreos.com>

PCI power management seems to work fine on Intel HDA controllers, so let's
turn that on. We can expand this to other vendors based on user feedback.
---
 Makefile.am                      | 3 ++-
 rules/90-hda-controller-pm.rules | 3 +++
 2 files changed, 5 insertions(+), 1 deletion(-)
 create mode 100644 rules/90-hda-controller-pm.rules

diff --git a/Makefile.am b/Makefile.am
index 68d8252..d23c428 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3752,7 +3752,8 @@ dist_udevrules_DATA += \
 	rules/70-touchpad.rules \
 	rules/75-net-description.rules \
 	rules/78-sound-card.rules \
-	rules/80-net-setup-link.rules
+	rules/80-net-setup-link.rules \
+	rules/90-hda-controller-pm.rules
 
 nodist_udevrules_DATA += \
 	rules/99-systemd.rules
diff --git a/rules/90-hda-controller-pm.rules b/rules/90-hda-controller-pm.rules
new file mode 100644
index 0000000..2f915be
--- /dev/null
+++ b/rules/90-hda-controller-pm.rules
@@ -0,0 +1,3 @@
+# Enable autosuspend for some HDA interfaces
+
+ACTION=="add", SUBSYSTEM=="pci", ATTR{class}=="0x040300", ATTR{vendor}=="0x8086", ATTR{power/control}="auto"
-- 
2.3.5