Commit c3b40930 authored by Shyam Sundar S K's avatar Shyam Sundar S K Committed by Hans de Goede
Browse files

platform/x86/amd/pmf: Add support update p3t limit 



P3T (Peak Package Power Limit) is a metric within the SMU controller
that can influence the power limits. Add support from the driver
to update P3T limits accordingly.

Reviewed-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Signed-off-by: default avatarShyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20231212014705.2017474-8-Shyam-sundar.S-k@amd.com


Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent f4627dfd

drivers/platform/x86/amd/pmf/pmf.h

+3 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ 
#define GET_STT_MIN_LIMIT	0x1F

#define GET_STT_LIMIT_APU	0x20

#define GET_STT_LIMIT_HS2	0x21

#define SET_P3T				0x23 /* P3T: Peak Package Power Limit */



/* OS slider update notification */

#define DC_BEST_PERF		0
@@ -72,6 +73,7 @@ 
#define PMF_POLICY_STT_MIN					6

#define PMF_POLICY_STT_SKINTEMP_APU				7

#define PMF_POLICY_STT_SKINTEMP_HS2				8

#define PMF_POLICY_P3T						38



/* TA macros */

#define PMF_TA_IF_VERSION_MAJOR				1
@@ -481,6 +483,7 @@ struct pmf_action_table { 
	u32 stt_minlimit;	/* in mW */

	u32 stt_skintemp_apu;	/* in C */

	u32 stt_skintemp_hs2;	/* in C */

	u32 p3t_limit;		/* in mW */

};



/* Input conditions */

drivers/platform/x86/amd/pmf/tee-if.c

+8 −0
Original line number Diff line number Diff line
@@ -105,6 +105,14 @@ static void amd_pmf_apply_policies(struct amd_pmf_dev *dev, struct ta_pmf_enact_ 
				dev->prev_data->stt_skintemp_hs2 = val;

			}

			break;



		case PMF_POLICY_P3T:

			if (dev->prev_data->p3t_limit != val) {

				amd_pmf_send_cmd(dev, SET_P3T, false, val, NULL);

				dev_dbg(dev->dev, "update P3T: %u\n", val);

				dev->prev_data->p3t_limit = val;

			}

			break;

		}

	}

}