This is a note to let you know that I've just added the patch titled
platform/x86/intel/pmc/arl: Put GNA device in D3
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
platform-x86-intel-pmc-arl-put-gna-device-in-d3.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 0d7f245c296e7e67067db19e5499398b8a8eb49d
Author: David E. Box <david.e.box@xxxxxxxxxxxxxxx>
Date: Tue Feb 27 11:01:34 2024 -0800
platform/x86/intel/pmc/arl: Put GNA device in D3
[ Upstream commit ac2d1fd9688fcdfba5acc815fb2b13fec83e5dad ]
As is the case on Meteor Lake, the Gaussian & Neural Accelerator (GNA)
device is powered by BIOS to D0 by default. If no driver is loaded, this
will cause the Package C state to be limited to PC2, leading to
significant power consumption and decrease in batter life. Put the GNA
device in D3 by default if no driver is loaded for it.
Fixes: 83f168a1a437 ("platform/x86/intel/pmc: Add Arrow Lake S support to intel_pmc_core driver")
Signed-off-by: "David E. Box" <david.e.box@xxxxxxxxxxxxxxx>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240227190134.1592072-3-david.e.box@xxxxxxxxxxxxxxx
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/platform/x86/intel/pmc/arl.c b/drivers/platform/x86/intel/pmc/arl.c
index 683ae828276b8..34b4cd23bfe59 100644
--- a/drivers/platform/x86/intel/pmc/arl.c
+++ b/drivers/platform/x86/intel/pmc/arl.c
@@ -673,6 +673,7 @@ static struct pmc_info arl_pmc_info_list[] = {
};
#define ARL_NPU_PCI_DEV 0xad1d
+#define ARL_GNA_PCI_DEV 0xae4c
/*
* Set power state of select devices that do not have drivers to D3
* so that they do not block Package C entry.
@@ -680,6 +681,7 @@ static struct pmc_info arl_pmc_info_list[] = {
static void arl_d3_fixup(void)
{
pmc_core_set_device_d3(ARL_NPU_PCI_DEV);
+ pmc_core_set_device_d3(ARL_GNA_PCI_DEV);
}
static int arl_resume(struct pmc_dev *pmcdev)
