linux-kernel - [PATCH 3/3] platform/x86/intel/pmc: Enable substate residencies for multiple PMCs

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Message-ID: <20251217002343.2289577-4-xi.pardee@linux.intel.com>
Date: Tue, 16 Dec 2025 16:23:40 -0800
From: Xi Pardee <xi.pardee@...ux.intel.com>
To: xi.pardee@...ux.intel.com,
	irenic.rajneesh@...il.com,
	david.e.box@...ux.intel.com,
	hdegoede@...hat.com,
	ilpo.jarvinen@...ux.intel.com,
	platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org
Subject: [PATCH 3/3] platform/x86/intel/pmc: Enable substate residencies for multiple PMCs

Enable substate residencies support for multiple PMCs. Previously
substate residencies were shown only for the primary PMC. This
change enables substate residencies for all available PMCs.

Signed-off-by: Xi Pardee <xi.pardee@...ux.intel.com>
---
 drivers/platform/x86/intel/pmc/core.c | 26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index 25f77a9dc42c5..1f84d5ef47458 100644
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -776,16 +776,26 @@ static inline u64 adjust_lpm_residency(struct pmc *pmc, u32 offset,
 static int pmc_core_substate_res_show(struct seq_file *s, void *unused)
 {
 	struct pmc_dev *pmcdev = s->private;
-	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
-	const int lpm_adj_x2 = pmc->map->lpm_res_counter_step_x2;
-	u32 offset = pmc->map->lpm_residency_offset;
-	u8 mode;
+	unsigned int pmc_idx;
+
+	for (pmc_idx = 0; pmc_idx < ARRAY_SIZE(pmcdev->pmcs); ++pmc_idx) {
+		int lpm_adj_x2;
+		struct pmc *pmc;
+		u32 offset;
+		u8 mode;
 
-	seq_printf(s, "%-10s %-15s\n", "Substate", "Residency");
+		pmc = pmcdev->pmcs[pmc_idx];
+		if (!pmc)
+			continue;
 
-	pmc_for_each_mode(mode, pmc) {
-		seq_printf(s, "%-10s %-15llu\n", pmc_lpm_modes[mode],
-			   adjust_lpm_residency(pmc, offset + (4 * mode), lpm_adj_x2));
+		lpm_adj_x2 = pmc->map->lpm_res_counter_step_x2;
+		offset = pmc->map->lpm_residency_offset;
+
+		seq_printf(s, "pmc%u %10s %15s\n", pmc_idx, "Substate", "Residency");
+		pmc_for_each_mode(mode, pmc) {
+			seq_printf(s, "%15s %15llu\n", pmc_lpm_modes[mode],
+				   adjust_lpm_residency(pmc, offset + (4 * mode), lpm_adj_x2));
+		}
 	}
 
 	return 0;
-- 
2.43.0