linux-kernel - [265/272] drm: Only set DPMS ON when actually configuring a mode

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Message-Id: <20110216001451.576800857@clark.kroah.org>
Date:	Tue, 15 Feb 2011 16:15:22 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Keith Packard <keithp@...thp.com>
Subject: [265/272] drm: Only set DPMS ON when actually configuring a mode

2.6.37-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Keith Packard <keithp@...thp.com>

commit 811aaa55ba21ab37407018cfc01770d6b037d3fb upstream.

In drm_crtc_helper_set_config, instead of always forcing all outputs
to DRM_MODE_DPMS_ON, only set them if the CRTC is actually getting a
mode set, as any mode set will turn all outputs on.

This fixes https://lkml.org/lkml/2011/1/24/457

Signed-off-by: Keith Packard <keithp@...thp.com>
Reported-and-tested-by: Carlos R. Mafra <crmafra2@...il.com>
Tested-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/gpu/drm/drm_crtc_helper.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -654,6 +654,12 @@ int drm_crtc_helper_set_config(struct dr
 				ret = -EINVAL;
 				goto fail;
 			}
+			DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
+			for (i = 0; i < set->num_connectors; i++) {
+				DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
+					      drm_get_connector_name(set->connectors[i]));
+				set->connectors[i]->dpms = DRM_MODE_DPMS_ON;
+			}
 		}
 		drm_helper_disable_unused_functions(dev);
 	} else if (fb_changed) {
@@ -670,12 +676,6 @@ int drm_crtc_helper_set_config(struct dr
 			goto fail;
 		}
 	}
-	DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
-	for (i = 0; i < set->num_connectors; i++) {
-		DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
-			      drm_get_connector_name(set->connectors[i]));
-		set->connectors[i]->dpms = DRM_MODE_DPMS_ON;
-	}
 
 	kfree(save_connectors);
 	kfree(save_encoders);


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