drm/amd/powerplay: make power limit retrieval as asic specific

The power limit retrieval should be done per asic. Since we may
need to lookup in the pptable and that's really asic specific.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 51 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c b/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
index c67a9914ce7b..9360f5a25b69 100644
--- a/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
@@ -1323,6 +1323,56 @@ arcturus_get_profiling_clk_mask(struct smu_context *smu,
 	return 0;
 }
 
+static int arcturus_get_power_limit(struct smu_context *smu,
+				     uint32_t *limit,
+				     bool asic_default)
+{
+	PPTable_t *pptable = smu->smu_table.driver_pptable;
+	uint32_t asic_default_power_limit;
+	int ret = 0;
+	int power_src;
+
+	if (!smu->default_power_limit ||
+	    !smu->power_limit) {
+		if (smu_feature_is_enabled(smu, SMU_FEATURE_PPT_BIT)) {
+			power_src = smu_power_get_index(smu, SMU_POWER_SOURCE_AC);
+			if (power_src < 0)
+				return -EINVAL;
+
+			ret = smu_send_smc_msg_with_param(smu, SMU_MSG_GetPptLimit,
+				power_src << 16);
+			if (ret) {
+				pr_err("[%s] get PPT limit failed!", __func__);
+				return ret;
+			}
+			smu_read_smc_arg(smu, &asic_default_power_limit);
+		} else {
+			/* the last hope to figure out the ppt limit */
+			if (!pptable) {
+				pr_err("Cannot get PPT limit due to pptable missing!");
+				return -EINVAL;
+			}
+			asic_default_power_limit =
+				pptable->SocketPowerLimitAc[PPT_THROTTLER_PPT0];
+		}
+
+		if (smu->od_enabled) {
+			asic_default_power_limit *= (100 + smu->smu_table.TDPODLimit);
+			asic_default_power_limit /= 100;
+		}
+
+		smu->default_power_limit = asic_default_power_limit;
+		smu->power_limit = asic_default_power_limit;
+	}
+
+	if (asic_default)
+		*limit = smu->default_power_limit;
+	else
+		*limit = smu->power_limit;
+
+	return 0;
+}
+
 static void arcturus_dump_pptable(struct smu_context *smu)
 {
 	struct smu_table_context *table_context = &smu->smu_table;
@@ -1788,6 +1838,7 @@ static const struct pptable_funcs arcturus_ppt_funcs = {
 	.get_profiling_clk_mask = arcturus_get_profiling_clk_mask,
 	/* debug (internal used) */
 	.dump_pptable = arcturus_dump_pptable,
+	.get_power_limit = arcturus_get_power_limit,
 };
 
 void arcturus_set_ppt_funcs(struct smu_context *smu)