From: Alex Deucher Date: Thu, 11 Apr 2013 16:45:34 +0000 (-0400) Subject: drm/radeon/evergreen+: don't enable HPD interrupts on eDP/LVDS X-Git-Tag: v3.0.78~7 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=370112b115a3867b2ebf0ac6a2f44f11425fe818;p=thirdparty%2Fkernel%2Fstable.git drm/radeon/evergreen+: don't enable HPD interrupts on eDP/LVDS commit 2e97be73e5f74a317232740ae82eb8f95326a660 upstream. 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index a75d290b4f96b..d3264b9e3b6c8 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -330,6 +330,16 @@ 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);