From: Puthikorn Voravootivat Date: Thu, 11 May 2017 23:02:21 +0000 (-0700) Subject: drm/i915: Set backlight mode before enable backlight X-Git-Tag: v4.13-rc1~73^2~28^2~67 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e9c9e5ae8b57a6f29aecc303b36173e0be7fdd60;p=karo-tx-linux.git 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 Reviewed-by: Dhinakaran Pandiyan Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/20170511230225.142870-6-puthik@chromium.org --- diff --git a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c index 870c03fc0f3a..5f945e05efe2 100644 --- a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c @@ -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)