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drm/i915: Set backlight mode before enable backlight 

We should set backlight mode register before set register to
enable the backlight.

Signed-off-by: Puthikorn Voravootivat <puthik@chromium.org>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170511230225.142870-6-puthik@chromium.org
This commit is contained in:
Puthikorn Voravootivat 2017-05-11 16:02:21 -07:00 committed by Jani Nikula
parent 73ab484c90
commit e9c9e5ae8b
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/intel_dp_aux_backlight.c
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@ -99,8 +99,6 @@ static void intel_dp_aux_enable_backlight(struct intel_connector *connector)
uint8_t dpcd_buf = 0;
uint8_t edp_backlight_mode = 0;
set_aux_backlight_enable(intel_dp, true);
if (drm_dp_dpcd_readb(&intel_dp->aux,
DP_EDP_BACKLIGHT_MODE_SET_REGISTER, &dpcd_buf) != 1) {
DRM_DEBUG_KMS("Failed to read DPCD register 0x%x\n",
@ -127,6 +125,8 @@ static void intel_dp_aux_enable_backlight(struct intel_connector *connector)
default:
break;
}
set_aux_backlight_enable(intel_dp, true);
}
static void intel_dp_aux_disable_backlight(struct intel_connector *connector)