From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Mon, 19 Jan 2026 14:31:13 +0000 (+0100)
Subject: pmdomain: core: Restructure domain idle states data for genpd in debugfs
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=32d731611a6e9d1456f9fa2c1ec7742f25190c61;p=thirdparty%2Fkernel%2Flinux.git

pmdomain: core: Restructure domain idle states data for genpd in debugfs

To prepare for additional information to be added for the domain idle
states in genpd's debugfs, let's make the existing information denser. To
allow that, let's move the static information of the domain idle states
into a separate debugfs file.

Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index 52ea84e548ff6..3b2e152dfd35c 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -3772,11 +3772,11 @@ static int idle_states_show(struct seq_file *s, void *data)
 	if (ret)
 		return -ERESTARTSYS;
 
-	seq_puts(s, "State          Time Spent(ms) Usage      Rejected   Above      Below\n");
+	seq_puts(s, "State  Time(ms)       Usage      Rejected   Above      Below\n");
 
 	for (i = 0; i < genpd->state_count; i++) {
 		struct genpd_power_state *state = &genpd->states[i];
-		char state_name[15];
+		char state_name[7];
 
 		idle_time += state->idle_time;
 
@@ -3788,14 +3788,36 @@ static int idle_states_show(struct seq_file *s, void *data)
 			}
 		}
 
-		if (!state->name)
-			snprintf(state_name, ARRAY_SIZE(state_name), "S%-13d", i);
-
+		snprintf(state_name, ARRAY_SIZE(state_name), "S%-5d", i);
 		do_div(idle_time, NSEC_PER_MSEC);
-		seq_printf(s, "%-14s %-14llu %-10llu %-10llu %-10llu %llu\n",
-			   state->name ?: state_name, idle_time,
-			   state->usage, state->rejected, state->above,
-			   state->below);
+		seq_printf(s, "%-6s %-14llu %-10llu %-10llu %-10llu %llu\n",
+			   state_name, idle_time, state->usage, state->rejected,
+			   state->above, state->below);
+	}
+
+	genpd_unlock(genpd);
+	return ret;
+}
+
+static int idle_states_desc_show(struct seq_file *s, void *data)
+{
+	struct generic_pm_domain *genpd = s->private;
+	unsigned int i;
+	int ret = 0;
+
+	ret = genpd_lock_interruptible(genpd);
+	if (ret)
+		return -ERESTARTSYS;
+
+	seq_puts(s, "State  Name\n");
+
+	for (i = 0; i < genpd->state_count; i++) {
+		struct genpd_power_state *state = &genpd->states[i];
+		char state_name[7];
+
+		snprintf(state_name, ARRAY_SIZE(state_name), "S%-5d", i);
+		seq_printf(s, "%-6s %s\n",
+			   state_name, state->name ?: "N/A");
 	}
 
 	genpd_unlock(genpd);
@@ -3891,6 +3913,7 @@ DEFINE_SHOW_ATTRIBUTE(summary);
 DEFINE_SHOW_ATTRIBUTE(status);
 DEFINE_SHOW_ATTRIBUTE(sub_domains);
 DEFINE_SHOW_ATTRIBUTE(idle_states);
+DEFINE_SHOW_ATTRIBUTE(idle_states_desc);
 DEFINE_SHOW_ATTRIBUTE(active_time);
 DEFINE_SHOW_ATTRIBUTE(total_idle_time);
 DEFINE_SHOW_ATTRIBUTE(devices);
@@ -3911,6 +3934,8 @@ static void genpd_debug_add(struct generic_pm_domain *genpd)
 			    d, genpd, &sub_domains_fops);
 	debugfs_create_file("idle_states", 0444,
 			    d, genpd, &idle_states_fops);
+	debugfs_create_file("idle_states_desc", 0444,
+			    d, genpd, &idle_states_desc_fops);
 	debugfs_create_file("active_time", 0444,
 			    d, genpd, &active_time_fops);
 	debugfs_create_file("total_idle_time", 0444,