[Intel-gfx] Second HDMI port not visible

[Jesse Barnes]

Chris's machine would be a good regression test for this.  If it works
for him too, I think we should push it.

Thanks,
Jesse

On Wed, 7 Aug 2013 19:15:10 +0000
"Matsumura, Ryan" <ryan.matsumura at intel.com> wrote:

> Awesome, that worked thanks Jesse!  Will this be just a hack or will  you push this as a fix in future releases?
> 
> -Ryan
> -----Original Message-----
> From: Jesse Barnes [mailto:jbarnes at virtuousgeek.org] 
> Sent: Wednesday, August 07, 2013 8:49 AM
> To: Daniel Vetter
> Cc: Matsumura, Ryan; intel-gfx at lists.freedesktop.org
> Subject: Re: [Intel-gfx] Second HDMI port not visible
> 
> 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