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Commit a644ca9b authored by Puthikorn Voravootivat's avatar Puthikorn Voravootivat Committed by Jani Nikula
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drm/i915: Fix cap check for intel_dp_aux_backlight driver 



intel_dp_aux_backlight driver should check for the
DP_EDP_BACKLIGHT_BRIGHTNESS_AUX_SET_CAP before enable the driver.

Signed-off-by: default avatarPuthikorn Voravootivat <puthik@chromium.org>
Reviewed-by: default avatarDhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170511230225.142870-2-puthik@chromium.org
parent 1f23475c

drivers/gpu/drm/i915/intel_dp_aux_backlight.c

+1 −0
Original line number Diff line number Diff line
@@ -144,6 +144,7 @@ intel_dp_aux_display_control_capable(struct intel_connector *connector) 
	 */

	if (intel_dp->edp_dpcd[1] & DP_EDP_TCON_BACKLIGHT_ADJUSTMENT_CAP &&

	    (intel_dp->edp_dpcd[1] & DP_EDP_BACKLIGHT_AUX_ENABLE_CAP) &&

	    (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_AUX_SET_CAP) &&

	    !((intel_dp->edp_dpcd[1] & DP_EDP_BACKLIGHT_PIN_ENABLE_CAP) ||

	      (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_PWM_PIN_CAP))) {

		DRM_DEBUG_KMS("AUX Backlight Control Supported!\n");