Attachment 120493 Details for Bug 91393 – Disable fast link training when resuming

[patch] Disable fast link training when resuming

v2-0002-drm-i915-Disable-DP-fast-link-training-when-resum.patch (text/plain), 1.49 KB, created by Mika Kahola on 2015-12-14 11:39:10 UTC

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Creator: Mika Kahola

Created: 2015-12-14 11:39:10 UTC

Size: 1.49 KB

patch

obsolete

>From dde1cfd83207405d91469a2a6023616edc79dcfd Mon Sep 17 00:00:00 2001
>From: Mika Kahola <mika.kahola@intel.com>
>Date: Mon, 14 Dec 2015 13:29:55 +0200
>Subject: [PATCH v2 2/2] drm/i915: Disable DP fast link training when resuming
>
>Disable DisplayPort fast link training feature when resuming
>back from the suspend state. This fixes a reported screen
>flickering issue reported in
>
>Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91393
>
>Signed-off-by: Mika Kahola <mika.kahola@intel.com>
>---
> drivers/gpu/drm/i915/intel_display.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
>diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
>index 7dd7200..256e625 100644
>--- a/drivers/gpu/drm/i915/intel_display.c
>+++ b/drivers/gpu/drm/i915/intel_display.c
>@@ -15733,6 +15733,7 @@ void intel_display_resume(struct drm_device *dev)
> 	struct intel_connector *conn;
> 	struct intel_plane *plane;
> 	struct drm_crtc *crtc;
>+	struct intel_dp *intel_dp;
> 	int ret;
> 
> 	if (!state)
>@@ -15762,6 +15763,13 @@ void intel_display_resume(struct drm_device *dev)
> 	}
> 
> 	for_each_intel_connector(dev, conn) {
>+		if (conn->base.connector_type == DRM_MODE_CONNECTOR_eDP ||
>+		    conn->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
>+			intel_dp = enc_to_intel_dp(&conn->encoder->base);
>+			intel_dp->train_set_valid = false;
>+			DRM_DEBUG_KMS("DP fast link training disabled\n");
>+		}
>+
> 		ret = PTR_ERR_OR_ZERO(drm_atomic_get_connector_state(state, &conn->base));
> 		if (ret)
> 			goto err;
>-- 
>1.9.1
>

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