Patchwork [3/3,Precise] UBUNTU: (pre-stable): drm/radeon/kms: disable output polling when suspended

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Submitter Seth Forshee
Date Feb. 2, 2012, 9:05 p.m.
Message ID <1328216755-12268-4-git-send-email-seth.forshee@canonical.com>
Download mbox | patch
Permalink /patch/139221/
State New
Headers show

Comments

Seth Forshee - Feb. 2, 2012, 9:05 p.m.
Polling the outputs when the device is suspended can result in erroneous
status updates. Disable output polling during suspend to prevent this
from happening.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit 86698c20f71d488b32c49ed4687fb3cf8a88a5ca)
BugLink: http://bugs.launchpad.net/bugs/925570
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
---
 drivers/gpu/drm/radeon/radeon_device.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

Patch

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 9b39145..9231564 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -864,6 +864,8 @@  int radeon_suspend_kms(struct drm_device *dev, pm_message_t state)
 	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 		return 0;
 
+	drm_kms_helper_poll_disable(dev);
+
 	/* turn off display hw */
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
@@ -950,6 +952,8 @@  int radeon_resume_kms(struct drm_device *dev)
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
 	}
+
+	drm_kms_helper_poll_enable(dev);
 	return 0;
 }