From: Lee, Shawn C Date: Wed, 13 Sep 2017 05:19:20 +0000 (+0800) Subject: drm/i915/cnp: set min brightness from VBT X-Git-Tag: v5.15~6763^2~28^2~2807 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f44e354f857f207cd361269c5e38e1f96e0b616c;p=platform%2Fkernel%2Flinux-starfive.git 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 Signed-off-by: Shawn Lee Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/1505279961-16140-1-git-send-email-shawn.c.lee@intel.com --- diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index d4dd248..3b1c5d7 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,