Attachment 126098 Details for Bug 97390 – Patch to make the HDMI output work

[patch] Patch to make the HDMI output work

0001-drm-i915-hack-PORTC-to-use-HDMI-i2C-gmbus-on-pin-5.patch (text/plain), 1.26 KB, created by Anisse Astier on 2016-08-29 10:43:15 UTC

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Creator: Anisse Astier

Created: 2016-08-29 10:43:15 UTC

Size: 1.26 KB

patch

obsolete

>From 760bc80adc1e5d3f7b35fd0ef06cf08fa6f501f5 Mon Sep 17 00:00:00 2001
>From: Anisse Astier <anisse@astier.eu>
>Date: Mon, 29 Aug 2016 12:02:40 +0200
>Subject: [PATCH] drm/i915: hack PORTC to use HDMI i2C gmbus on pin 5
>
>So on this Insyde board, the HDMI is on PORTC, but the i2c uses gmbus
>pin 5, which should be for PORTB. Which is why we can get the EDID if we
>force-enable PORTB, but not the output.
>
>With this patch PORTC will use gmbus pin 5, allowing the driver to get
>the EDID. It's obviously just a hack/PoC.
>
>Skylake has some information in the VBT to provide an alternate ddc pin,
>but I don't know if Braswell/Cherryview has the same information. To be
>continued...
>---
> drivers/gpu/drm/i915/intel_hdmi.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
>index 1a116a6..758f5f1 100644
>--- a/drivers/gpu/drm/i915/intel_hdmi.c
>+++ b/drivers/gpu/drm/i915/intel_hdmi.c
>@@ -1861,7 +1861,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
> 		if (IS_BROXTON(dev_priv))
> 			intel_hdmi->ddc_bus = GMBUS_PIN_2_BXT;
> 		else
>-			intel_hdmi->ddc_bus = GMBUS_PIN_DPC;
>+			intel_hdmi->ddc_bus = GMBUS_PIN_DPB;
> 		intel_encoder->hpd_pin = HPD_PORT_C;
> 		break;
> 	case PORT_D:
>-- 
>2.5.5
>

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Attachments on bug 97390: 125868 | 125869 | 125870 | 126098

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