Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2e97be73 authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/radeon/evergreen+: don't enable HPD interrupts on eDP/LVDS 

Avoids potential interrupt storms when the display is disabled.

May fix:
https://bugzilla.kernel.org/show_bug.cgi?id=56041



Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent 64d7b8be

drivers/gpu/drm/radeon/evergreen.c

+10 −0
Original line number Diff line number Diff line
@@ -819,6 +819,16 @@ 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);