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SubjectRe: [External] [PATCH] platform/x86: thinkpad_acpi: Explicitly set to balanced mode on startup
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On 8/19/2022 11:57, Mark Pearson wrote:
>
>
> On 2022-08-19 10:01, Mario Limonciello wrote:
>> It was observed that on a Thinkpad T14 Gen1 (AMD) that the platform
>> profile is starting up in 'low-power' mode after refreshing what the
>> firmware had. This is most likely a firmware bug, but as a harmless
>> workaround set the default profile to 'balanced' at thinkpad_acpi startup.
>>
>> Reported-and-tested-by: madcatx@atlas.cz
>> Link: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.kernel.org%2Fshow_bug.cgi%3Fid%3D216347&amp;data=05%7C01%7Cmario.limonciello%40amd.com%7C7f33822a8c2c428fdb0b08da8203f783%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637965250825035615%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=ua0qRTvx6MmngRCYI8TxgaTjLrd2fnRNtUhA0%2BRS6S8%3D&amp;reserved=0>> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
>> ---
>> drivers/platform/x86/thinkpad_acpi.c | 7 +------
>> 1 file changed, 1 insertion(+), 6 deletions(-)
>>
>> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
>> index 22d4e8633e30..e7e86c0b9ad7 100644
>> --- a/drivers/platform/x86/thinkpad_acpi.c
>> +++ b/drivers/platform/x86/thinkpad_acpi.c
>> @@ -10590,12 +10590,7 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
>> return -ENODEV;
>>
>> /* Ensure initial values are correct */
>> - dytc_profile_refresh();
>> -
>> - /* Set AMT correctly now we know current profile */
>> - if ((dytc_capabilities & BIT(DYTC_FC_PSC)) &&
>> - (dytc_capabilities & BIT(DYTC_FC_AMT)))
>> - dytc_control_amt(dytc_current_profile == PLATFORM_PROFILE_BALANCED);
>> + dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
>>
>> return 0;
>> }
> I'm hesitant on this and would like some time to dig into it first.
>
> I worry that this would be overriding the setting in the BIOS. On the
> Intel platforms (at least on the mobile workstations) we can set the
> default power setting in the BIOS. I don't see this on the T14 AMD G1 -
> and haven't had a chance to check other platforms so its less of a
> concern there.

Ah wasn't aware you stored it for some systems.

>
> As a compromise I'd want to force the profile to balanced on the PSC
> modes only.
>
> Ideally, if this is a FW bug we should get it fixed in FW. I know our FW
> team can be a bit slow, but I'd rather hold off a few more days until I
> have a better idea where the issue is. I don't really understand why the
> person with the original issue is seeing the behaviour that they are.
>
> Mark

Sure; I'll send out a v2 to that effect.

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