[PATCH 07/15] platform/x86/amd/pmf: Add support update p3t limit

[Shyam Sundar S K]

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: Mario Limonciello <mario.limonciello at amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k at amd.com>
---
 drivers/platform/x86/amd/pmf/pmf.h    | 3 +++
 drivers/platform/x86/amd/pmf/tee-if.c | 8 ++++++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h
index e64b4d285624..897f61b75e2f 100644
--- a/drivers/platform/x86/amd/pmf/pmf.h
+++ b/drivers/platform/x86/amd/pmf/pmf.h
@@ -46,6 +46,7 @@
 #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
@@ -69,6 +70,7 @@
 #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
@@ -472,6 +474,7 @@ struct pmf_action_table {
 	unsigned long stt_minlimit; /* in mW */
 	unsigned long stt_skintemp_apu; /* in C */
 	unsigned long stt_skintemp_hs2; /* in C */
+	unsigned long p3t_limit; /* in mW */
 };
 
 /* Input conditions */
diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c
index eb25d5ce3a9a..883dd143375a 100644
--- a/drivers/platform/x86/amd/pmf/tee-if.c
+++ b/drivers/platform/x86/amd/pmf/tee-if.c
@@ -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 : %d\n", val);
+				dev->prev_data->p3t_limit = val;
+			}
+			break;
 		}
 	}
 }
-- 
2.25.1