diff options
| author | Takashi Iwai <tiwai@suse.de> | 2011-11-16 10:58:03 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 08:54:08 -0800 |
| commit | d02f594b5287e6b8a0274991b6b6e645cef79b33 (patch) | |
| tree | 62a11455666a3b69be4405ca50ebfe861b3590c5 /drivers/gpu | |
| parent | 8f9940d1bf1d7dface90977031e327ee237408ca (diff) | |
drm/i915: Fix inconsistent backlight level during disabled
commit 04b38670cf46c096705f24e92a8747d1ab89e53c upstream.
When the brightness property is inquired while the backlight is disabled,
the driver returns a wrong value (zero) because it probes the value after
the backlight was turned off. This caused a black screen even after the
backlight is enabled again. It should return the internal backlight_level
instead, so that it won't be influenced by the backlight-enable state.
BugLink: https://bugs.freedesktop.org/show_bug.cgi?id=41926
BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/872652
Tested-by: Kamal Mostafa <kamal@canonical.com>
Cc: Alex Davis <alex14641@yahoo.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_panel.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index af08ff328dd0..007f6ca309d3 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -326,7 +326,8 @@ static int intel_panel_update_status(struct backlight_device *bd) static int intel_panel_get_brightness(struct backlight_device *bd) { struct drm_device *dev = bl_get_data(bd); - return intel_panel_get_backlight(dev); + struct drm_i915_private *dev_priv = dev->dev_private; + return dev_priv->backlight_level; } static const struct backlight_ops intel_panel_bl_ops = { |