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| author | Lee, Shawn C <shawn.c.lee@intel.com> | 2017-09-13 13:19:20 +0800 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2017-09-13 10:57:05 +0300 |
| commit | f44e354f857f207cd361269c5e38e1f96e0b616c (patch) | |
| tree | bee6e96df94171d7ff6269c7350f970c69aec7b9 | |
| parent | 33c8d8870c67faf3161898a56af98ac3c1c71450 (diff) | |
| download | linux-stable-f44e354f857f207cd361269c5e38e1f96e0b616c.tar.gz linux-stable-f44e354f857f207cd361269c5e38e1f96e0b616c.tar.bz2 linux-stable-f44e354f857f207cd361269c5e38e1f96e0b616c.zip | |
drm/i915/cnp: set min brightness from VBT
Min brightness value from vbt was missing for CNP platform.
This setting have to refer backlight ic spec to restrict
min backlight output. Without this restriction, driver would
allow to configure lower brightness value and violate
backlight ic requirement.
Fixes: 4c9f7086ac6d ("drm/i915/cnp: Backlight support for CNP.")
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Shawn Lee <shawn.c.lee@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1505279961-16140-1-git-send-email-shawn.c.lee@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/intel_panel.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index d4dd248ac9a8..3b1c5d783ee7 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -1737,6 +1737,8 @@ cnp_setup_backlight(struct intel_connector *connector, enum pipe unused) if (!panel->backlight.max) return -ENODEV; + panel->backlight.min = get_backlight_min_vbt(connector); + val = bxt_get_backlight(connector); val = intel_panel_compute_brightness(connector, val); panel->backlight.level = clamp(val, panel->backlight.min, |