[Intel-gfx] Second HDMI port not visible

[Jesse Barnes]

On Wed, 7 Aug 2013 09:41:39 +0200
Daniel Vetter <daniel at ffwll.ch> wrote:

> On Wed, Aug 7, 2013 at 5:10 AM, Matsumura, Ryan
> <ryan.matsumura at intel.com> wrote:
> > I have a BayTrail board with two HDMI ports and running the default Tizen 3.0M1 release.  The first HDMI shows up just fine but I can't get the second screen to display anything.  I tried enabling the second screen through the kernel command line parameters (video=HDMI-1:e video=HDMI-2:e) and running xrandr.  This is my output from xrandr -q
> 
> Iirc Baytrail still has a bunch of hardcoded ports ... Jesse?

I don't know of any boards with two HDMI ports, but if they're wired up
correctly something like this might work:

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_d
index 468dbc9..81e86af 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9304,8 +9304,13 @@ static void intel_setup_outputs(struct drm_device *dev)
                        intel_dp_init(dev, PCH_DP_D, PORT_D);
        } else if (IS_VALLEYVIEW(dev)) {
                /* Check for built-in panel first. Shares lanes with HDMI on SDV
-               if (I915_READ(VLV_DISPLAY_BASE + DP_C) & DP_DETECTED)
-                       intel_dp_init(dev, VLV_DISPLAY_BASE + DP_C, PORT_C);
+               if (I915_READ(VLV_DISPLAY_BASE + GEN4_HDMIC) & SDVO_DETECTED) {
+                       intel_hdmi_init(dev, VLV_DISPLAY_BASE + GEN4_HDMIC,
+                                       PORT_C);
+                       if (I915_READ(VLV_DISPLAY_BASE + DP_C) & DP_DETECTED)
+                               intel_dp_init(dev, VLV_DISPLAY_BASE + DP_C,
+                                             PORT_C);
+               }
 
                if (I915_READ(VLV_DISPLAY_BASE + GEN4_HDMIB) & SDVO_DETECTED) {
                        intel_hdmi_init(dev, VLV_DISPLAY_BASE + GEN4_HDMIB,

-- 
Jesse Barnes, Intel Open Source Technology Center