From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Thu, 16 Oct 2014 18:27:27 +0000 (+0300)
Subject: drm/i915: Warn if trying to register eDP on port != B/C on vlv/chv
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c17ed5b5a46ec715620b0548a187d3ed98f4cf0b;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

drm/i915: Warn if trying to register eDP on port != B/C on vlv/chv

Only ports B and C have the power sequencer and backlight controls,
so complain if we ever try to register an eDP connector on some other
port.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index b474a29d00d5..3f1858065a1c 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5203,6 +5203,11 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
 	if (type == DRM_MODE_CONNECTOR_eDP)
 		intel_encoder->type = INTEL_OUTPUT_EDP;
 
+	/* eDP only on port B and/or C on vlv/chv */
+	if (WARN_ON(IS_VALLEYVIEW(dev) && is_edp(intel_dp) &&
+		    port != PORT_B && port != PORT_C))
+		return false;
+
 	DRM_DEBUG_KMS("Adding %s connector on port %c\n",
 			type == DRM_MODE_CONNECTOR_eDP ? "eDP" : "DP",
 			port_name(port));