From 1da51581b00b3fc3ac72156e2a69c6bab71f7794 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Mon, 25 Nov 2013 17:15:35 +0200 Subject: drm/i915: add a debugfs entry for power domain info Add a debugfs entry showing the use-count for all power domains of each power well. v3: address comments from Paulo: - simplify power_domain_str() by using a switch table - move power_well::domain_count to power_domains - WARN_ON decrementing a 0 refcount Signed-off-by: Imre Deak Reviewed-by: Paulo Zanoni Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_pm.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/gpu/drm/i915/intel_pm.c') diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 6b4f91ee486..2f8399c347e 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5754,8 +5754,13 @@ void intel_display_power_get(struct drm_device *dev, power_domains = &dev_priv->power_domains; mutex_lock(&power_domains->lock); + +#if IS_ENABLED(CONFIG_DEBUG_FS) + power_domains->domain_use_count[domain]++; +#endif for_each_power_well(i, power_well, BIT(domain), power_domains) __intel_power_well_get(dev, power_well); + mutex_unlock(&power_domains->lock); } @@ -5770,8 +5775,15 @@ void intel_display_power_put(struct drm_device *dev, power_domains = &dev_priv->power_domains; mutex_lock(&power_domains->lock); + for_each_power_well_rev(i, power_well, BIT(domain), power_domains) __intel_power_well_put(dev, power_well); + +#if IS_ENABLED(CONFIG_DEBUG_FS) + WARN_ON(!power_domains->domain_use_count[domain]); + power_domains->domain_use_count[domain]--; +#endif + mutex_unlock(&power_domains->lock); } -- cgit v1.2.3