From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20130518021701.495292393@goodmis.org> Date: Fri, 17 May 2013 22:18:01 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Alex Deucher Subject: [ 124/136 ] drm/radeon/evergreen+: dont enable HPD interrupts on eDP/LVDS References: <20130518021557.139113314@goodmis.org> Content-Disposition: inline; filename=0124-drm-radeon-evergreen-don-t-enable-HPD-interrupts-on-.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.6.11.4 stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher [ Upstream commit 2e97be73e5f74a317232740ae82eb8f95326a660 ] Avoids potential interrupt storms when the display is disabled. May fix: https://bugzilla.kernel.org/show_bug.cgi?id=56041 Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org Signed-off-by: Steven Rostedt --- drivers/gpu/drm/radeon/evergreen.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index cbbaaf6..5c23991 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -569,6 +569,16 @@ void evergreen_hpd_init(struct radeon_device *rdev) list_for_each_entry(connector, &dev->mode_config.connector_list, head) { struct radeon_connector *radeon_connector = to_radeon_connector(connector); + + if (connector->connector_type == DRM_MODE_CONNECTOR_eDP || + connector->connector_type == DRM_MODE_CONNECTOR_LVDS) { + /* don't try to enable hpd on eDP or LVDS avoid breaking the + * aux dp channel on imac and help (but not completely fix) + * https://bugzilla.redhat.com/show_bug.cgi?id=726143 + * also avoid interrupt storms during dpms. + */ + continue; + } switch (radeon_connector->hpd.hpd) { case RADEON_HPD_1: WREG32(DC_HPD1_CONTROL, tmp); -- 1.7.10.4