[PATCH] drm/i915: don't always do full mode sets when infoframes are enabled

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Partial revert of

commit 206645910b9796bff13fcdb67bdca166b724ba62
Author: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Date:   Wed Nov 5 14:26:09 2014 -0800

    drm/i915: check for audio and infoframe changes across mode sets v2

References: https://bugs.freedesktop.org/show_bug.cgi?id=86683
Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/i915/intel_display.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 42bcbea..fe27a2c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11601,10 +11601,12 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
 		    to_intel_crtc(set->crtc)->config.has_audio)
 			config->mode_changed = true;
 
-		/* Force mode sets for any infoframe stuff */
-		if (pipe_config->has_infoframe ||
-		    to_intel_crtc(set->crtc)->config.has_infoframe)
-			config->mode_changed = true;
+		/*
+		 * Note we have an issue here with infoframes: current code
+		 * only updates them on the full mode set path per hw
+		 * requirements.  So here we should be checking for any
+		 * required changes and forcing a mode set.
+		 */
 	}
 
 	/* set_mode will free it in the mode_changed case */
-- 
1.9.1

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