diff options
| author | Jani Nikula <jani.nikula@intel.com> | 2013-04-12 16:18:38 +0400 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-04-18 11:43:23 +0400 |
| commit | dc652f90e088798bfa31f496ba994ddadd5d5680 (patch) | |
| tree | be9e4f7816a2316033e7dd5782ecd537ba8ccf2b /drivers/gpu | |
| parent | f7708f78bd51a46abf00ae22ebb1b7deb594fc62 (diff) | |
| download | linux-dc652f90e088798bfa31f496ba994ddadd5d5680.tar.xz | |
drm/i915: ensure single initialization and cleanup of backlight device
Backlight cleanup in the eDP connector destroy callback caused the
backlight device to be removed on some systems that first initialized LVDS
and then attempted to initialize eDP. Prevent multiple backlight
initializations, and ensure backlight cleanup is only done once by moving
it to modeset cleanup.
A small wrinkle is the introduced asymmetry in backlight
setup/cleanup. This could be solved by adding refcounting, but it seems
overkill considering that there should only ever be one backlight device.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=55701
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Tested-by: Peter Verthez <peter.verthez@skynet.be>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lvds.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_panel.c | 7 |
4 files changed, 10 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 51871c248d6d..7672f3e49df1 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -9423,6 +9423,9 @@ void intel_modeset_cleanup(struct drm_device *dev) /* flush any delayed tasks or pending work */ flush_scheduled_work(); + /* destroy backlight, if any, before the connectors */ + intel_panel_destroy_backlight(dev); + drm_mode_config_cleanup(dev); intel_cleanup_overlay(dev); diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 173add1d819e..8845e82ec9ed 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2474,17 +2474,14 @@ done: static void intel_dp_destroy(struct drm_connector *connector) { - struct drm_device *dev = connector->dev; struct intel_dp *intel_dp = intel_attached_dp(connector); struct intel_connector *intel_connector = to_intel_connector(connector); if (!IS_ERR_OR_NULL(intel_connector->edid)) kfree(intel_connector->edid); - if (is_edp(intel_dp)) { - intel_panel_destroy_backlight(dev); + if (is_edp(intel_dp)) intel_panel_fini(&intel_connector->panel); - } drm_sysfs_connector_remove(connector); drm_connector_cleanup(connector); diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index ca2d903c19bb..f36f1baabd5a 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -631,7 +631,6 @@ static void intel_lvds_destroy(struct drm_connector *connector) if (!IS_ERR_OR_NULL(lvds_connector->base.edid)) kfree(lvds_connector->base.edid); - intel_panel_destroy_backlight(connector->dev); intel_panel_fini(&lvds_connector->base.panel); drm_sysfs_connector_remove(connector); diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index 7874cecc2863..eb5e6e95f3c7 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -428,6 +428,9 @@ int intel_panel_setup_backlight(struct drm_connector *connector) intel_panel_init_backlight(dev); + if (WARN_ON(dev_priv->backlight.device)) + return -ENODEV; + memset(&props, 0, sizeof(props)); props.type = BACKLIGHT_RAW; props.brightness = dev_priv->backlight.level; @@ -453,8 +456,10 @@ int intel_panel_setup_backlight(struct drm_connector *connector) void intel_panel_destroy_backlight(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; - if (dev_priv->backlight.device) + if (dev_priv->backlight.device) { backlight_device_unregister(dev_priv->backlight.device); + dev_priv->backlight.device = NULL; + } } #else int intel_panel_setup_backlight(struct drm_connector *connector) |