Attachment 87955 Details for Bug 70507 – sanitze ppt bifurcate state

[patch] sanitze ppt bifurcate state

0001-drm-i915-Sanitize-the-PPT-fdi-lane-bifurcate-state-o.patch (text/plain), 1.27 KB, created by Daniel Vetter on 2013-10-21 19:55:05 UTC

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Creator: Daniel Vetter

Created: 2013-10-21 19:55:05 UTC

Size: 1.27 KB

patch

obsolete

>From 7e4e4c696b1686f6460f1e57962164f302cf6ee7 Mon Sep 17 00:00:00 2001
>From: Daniel Vetter <daniel.vetter@ffwll.ch>
>Date: Mon, 21 Oct 2013 21:53:19 +0200
>Subject: [PATCH] drm/i915: Sanitize the PPT fdi lane bifurcate state on ivb
>
>We expect this bit to be always set when possible, but some BIOSes are
>lazy and don't do this. The result is a pile of WARNs and unhappy fdi
>link training code ...
>
>Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70507
>Cc: stable@vger.kernel.org
>Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
>---
> drivers/gpu/drm/i915/intel_display.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
>diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
>index cfe9e709..69c406c 100644
>--- a/drivers/gpu/drm/i915/intel_display.c
>+++ b/drivers/gpu/drm/i915/intel_display.c
>@@ -10700,6 +10700,11 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc)
> 		intel_enable_pipe_a(dev);
> 	}
> 
>+	/* Some BIOS don't always set this when it's possible ... */
>+	if (IS_IVYBRIDGE(dev) && crtc->pipe == PIPE_B &&
>+	    crtc->config.fdi_lanes < 2)
>+		cpt_enable_fdi_bc_bifurcation(dev);
>+
> 	/* Adjust the state of the output pipe according to whether we
> 	 * have active connectors/encoders. */
> 	intel_crtc_update_dpms(&crtc->base);
>-- 
>1.8.4.rc3
>

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Attachments on bug 70507: 87690 | 87739 | 87955 | 87969 | 87974 | 88220 | 88279 | 88282

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