From a644ca9bcdac3b9e9f0fd2726c9198e85cecfbee Mon Sep 17 00:00:00 2001 From: Puthikorn Voravootivat Date: Thu, 11 May 2017 16:02:17 -0700 Subject: [PATCH] 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: Puthikorn Voravootivat Reviewed-by: Dhinakaran Pandiyan Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/20170511230225.142870-2-puthik@chromium.org --- drivers/gpu/drm/i915/intel_dp_aux_backlight.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c index 6532e226db29..341bf2cb0c25 100644 --- a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c @@ -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"); -- 2.30.2