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[5/5] drm/i915: Store brightness level in aux backlight driver

Message ID 20170308213053.194062-6-puthik@chromium.org (mailing list archive)
State New, archived
Headers show

Commit Message

Puthikorn Voravootivat March 8, 2017, 9:30 p.m. UTC 
Some panel will default to zero brightness when turning the
panel off and on again. This patch stores last brightness level
before turning off and set them back when panel is turning on.

Signed-off-by: Puthikorn Voravootivat <puthik@chromium.org>
---
 drivers/gpu/drm/i915/intel_dp_aux_backlight.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
index 32b426006a6a..fd7258715c88 100644
--- a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
@@ -95,6 +95,7 @@  intel_dp_aux_set_backlight(struct intel_connector *connector, u32 level)
 		DRM_DEBUG_KMS("Failed to write aux backlight level\n");
 		return;
 	}
+	connector->panel.backlight.level = level;
 }
 
 /*
@@ -161,6 +162,7 @@  static void intel_dp_aux_enable_backlight(struct intel_connector *connector)
 		drm_dp_dpcd_writeb(&intel_dp->aux, DP_EDP_BACKLIGHT_FREQ_SET,
 			0xff);
 	}
+	intel_dp_aux_set_backlight(connector, connector->panel.backlight.level);
 }
 
 static void intel_dp_aux_disable_backlight(struct intel_connector *connector)