Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758822Ab3EIWlQ (ORCPT ); Thu, 9 May 2013 18:41:16 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:46371 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758436Ab3EIWe5 (ORCPT ); Thu, 9 May 2013 18:34:57 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alex Deucher Subject: [ 19/26] drm/radeon/evergreen+: dont enable HPD interrupts on eDP/LVDS Date: Thu, 9 May 2013 15:34:33 -0700 Message-Id: <20130509223424.448977523@linuxfoundation.org> X-Mailer: git-send-email 1.8.3.rc0.20.gb99dd2e In-Reply-To: <20130509223422.368544659@linuxfoundation.org> References: <20130509223422.368544659@linuxfoundation.org> User-Agent: quilt/0.60-5.1.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1574 Lines: 46 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher 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 --- drivers/gpu/drm/radeon/evergreen.c | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -445,6 +445,16 @@ void evergreen_hpd_init(struct radeon_de 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/