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drm/i915/panel: Track temporary rpm wakeref

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Keep track of the temporary rpm wakeref used for panel backlight access,
so that we can cancel it immediately upon release and so more clearly
identify leaks.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190114142129.24398-13-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-01-14 14:21:21 +00:00
parent 6a712a20bf
commit 2cb2cb5ff4
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/i915/intel_panel.c
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@ -1203,17 +1203,18 @@ static int intel_backlight_device_get_brightness(struct backlight_device *bd)
struct intel_connector *connector = bl_get_data(bd);
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
intel_wakeref_t wakeref;
u32 hw_level;
int ret;
intel_runtime_pm_get(dev_priv);
wakeref = intel_runtime_pm_get(dev_priv);
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
hw_level = intel_panel_get_backlight(connector);
ret = scale_hw_to_user(connector, hw_level, bd->props.max_brightness);
drm_modeset_unlock(&dev->mode_config.connection_mutex);
intel_runtime_pm_put_unchecked(dev_priv);
intel_runtime_pm_put(dev_priv, wakeref);
return ret;
}