On 2/21/24 1:12 PM, David E. Box wrote:
> To unblock Package C state entry, put the GNA device in D3 by default if no
> driver is loaded for it.
Can you add more details about the C state issue? If no driver is enumerated,
should it not follow the firmware default value? Why not fix this in firmware?
>
> 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>
> ---
> drivers/platform/x86/intel/pmc/arl.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/platform/x86/intel/pmc/arl.c b/drivers/platform/x86/intel/pmc/arl.c
> index 683ae828276b..34b4cd23bfe5 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)
--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer
