drm: Only set DPMS ON when actually configuring a mode

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@keithp.com>
Cc: stable@kernel.org (2.6.37)
Reported-and-tested-by: Carlos R. Mafra <crmafra2@gmail.com>
Tested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 952b3d4..17459ee 100644 (file)
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -665,6 +665,12 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
                                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) {
@@ -681,12 +687,6 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
                        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);