[PATCH 8/8] drm/i915: add a debugfs entry for power domain info

[Imre Deak <imre.deak@intel.com>]

Signed-off-by: Imre Deak <imre.deak@intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 68 +++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 5c45e9e..a32f3c4 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1760,6 +1760,73 @@ static int i915_pc8_status(struct seq_file *m, void *unused)
 	return 0;
 }
 
+static const char *power_domain_str(enum intel_display_power_domain domain)
+{
+#define PWRD(p)	{ POWER_DOMAIN_ ## p, # p }
+	static struct {
+		enum intel_display_power_domain domain;
+		const char *name;
+	} table[] = {
+		PWRD(PIPE_A),
+		PWRD(PIPE_B),
+		PWRD(PIPE_C),
+		PWRD(PIPE_A_PANEL_FITTER),
+		PWRD(PIPE_B_PANEL_FITTER),
+		PWRD(PIPE_C_PANEL_FITTER),
+		PWRD(TRANSCODER_A),
+		PWRD(TRANSCODER_B),
+		PWRD(TRANSCODER_C),
+		PWRD(TRANSCODER_EDP),
+		PWRD(VGA),
+		PWRD(AUDIO),
+		PWRD(INIT),
+	};
+#undef PWRD
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(table); i++)
+		if (table[i].domain == domain)
+			return table[i].name;
+
+	WARN_ON(1);
+
+	return "?";
+}
+
+static int i915_power_domain_info(struct seq_file *m, void *unused)
+{
+	struct drm_info_node *node = (struct drm_info_node *) m->private;
+	struct drm_device *dev = node->minor->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	int i;
+
+	mutex_lock(&power_domains->lock);
+
+	for (i = 0; i < power_domains->power_well_count; i++) {
+		struct i915_power_well *power_well;
+		enum intel_display_power_domain power_domain;
+
+		power_well = &power_domains->power_wells[i];
+		seq_printf(m, "Power well: %s\n", power_well->name);
+		seq_printf(m, "  Use count: %d\n", power_well->count);
+		seq_printf(m, "  Power domains:\n");
+
+		for (power_domain = 0; power_domain < POWER_DOMAIN_NUM;
+		     power_domain++) {
+			if (!(BIT(power_domain) & power_well->domains))
+				continue;
+
+			seq_printf(m, "    %s\n",
+				   power_domain_str(power_domain));
+		}
+	}
+
+	mutex_unlock(&power_domains->lock);
+
+	return 0;
+}
+
 struct pipe_crc_info {
 	const char *name;
 	struct drm_device *dev;
@@ -2820,6 +2887,7 @@ static struct drm_info_list i915_debugfs_list[] = {
 	{"i915_edp_psr_status", i915_edp_psr_status, 0},
 	{"i915_energy_uJ", i915_energy_uJ, 0},
 	{"i915_pc8_status", i915_pc8_status, 0},
+	{"i915_power_domain_info", i915_power_domain_info, 0},
 };
 #define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)
 
-- 
1.8.4