From 7b334fcb45b757ffb093696ca3de1b0c8b4a33f1 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 9 Sep 2010 23:51:02 +0100 Subject: drm: Use a nondestructive mode for output detect when polling MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Destructive load-detection is very expensive and due to failings elsewhere can trigger system wide stalls of up to 600ms. A simple first step to correcting this is not to invoke such an expensive and destructive load-detection operation automatically. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29536 Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=16265 Reported-by: Bruno Prémont Tested-by: Sitsofe Wheeler Signed-off-by: Chris Wilson Cc: stable@kernel.org Signed-off-by: Dave Airlie --- drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c') diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c index 2ff5cf78235f..a527c91c0ba6 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c @@ -335,7 +335,8 @@ static void vmw_ldu_connector_restore(struct drm_connector *connector) } static enum drm_connector_status - vmw_ldu_connector_detect(struct drm_connector *connector) + vmw_ldu_connector_detect(struct drm_connector *connector, + bool nondestructive) { if (vmw_connector_to_ldu(connector)->pref_active) return connector_status_connected; -- cgit v1.2.3