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| author | Takashi Iwai <tiwai@suse.de> | 2011-11-16 10:58:03 +0100 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-11-17 12:59:58 -0800 |
| commit | 04b38670cf46c096705f24e92a8747d1ab89e53c (patch) | |
| tree | 2aa34cbb1e725f2f2c50bee3d1da76d5cc1e14d5 | |
| parent | 457eafce618cf89125da9d79751d81241bd3fa34 (diff) | |
| download | blackbird-op-linux-04b38670cf46c096705f24e92a8747d1ab89e53c.tar.gz blackbird-op-linux-04b38670cf46c096705f24e92a8747d1ab89e53c.zip | |
drm/i915: Fix inconsistent backlight level during disabled
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>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Keith Packard <keithp@keithp.com>
| -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 499d4c0dbeeb..21f60b7d69a3 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 = { |
