[PATCH] drm/i915/ddi: Fix default eDP detection on port A

From: Thomas Preston <thomas.preston@codethink.co.uk>
To: jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com,
	rodrigo.vivi@intel.com, airlied@linux.ie,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
	linux-kernel@vger.kernel.org
Cc: Thomas Preston <thomas.preston@codethink.co.uk>
Subject: [PATCH] drm/i915/ddi: Fix default eDP detection on port A
Date: Wed,  6 Mar 2019 20:06:18 +0000	[thread overview]
Message-ID: <20190306200618.17405-1-thomas.preston@codethink.co.uk> (raw)

We rely on VBT DDI port info for eDP detection on GEN9 platforms and
above. This breaks GEN9 platforms which don't have VBT because port A
eDP now defaults to false. Fix this by defaulting to true when VBT is
missing.

Fixes: commit a98d9c1d7e9b ("drm/i915/ddi: Rely on VBT DDI port info for eDP detection")
Signed-off-by: Thomas Preston <thomas.preston@codethink.co.uk>
---
 drivers/gpu/drm/i915/intel_bios.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 1faa494e2bc9..efbbfb64b55f 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -1629,6 +1629,7 @@ init_vbt_missing_defaults(struct drm_i915_private *dev_priv)
 		info->supports_dvi = (port != PORT_A && port != PORT_E);
 		info->supports_hdmi = info->supports_dvi;
 		info->supports_dp = (port != PORT_E);
+		info->supports_edp = (port == PORT_A);
 	}
 }
 
-- 
2.11.0

