Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030372AbcJ2Nwh (ORCPT ); Sat, 29 Oct 2016 09:52:37 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:49706 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S943016AbcJ2NwX (ORCPT ); Sat, 29 Oct 2016 09:52:23 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alex Deucher Subject: [PATCH 4.8 008/125] drm/amdgpu/dce11: disable hpd on local panels Date: Sat, 29 Oct 2016 09:48:46 -0400 Message-Id: <20161029134947.568506152@linuxfoundation.org> X-Mailer: git-send-email 2.10.1 In-Reply-To: <20161029134947.232372651@linuxfoundation.org> References: <20161029134947.232372651@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2223 Lines: 62 4.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher commit 3a9d993ee9809c217f4322623a9b78c8d17fdd1f upstream. Otherwise we can get a hotplug interrupt storm when we turn the panel off if hpd interrupts were enabled by the bios. bug: https://bugs.freedesktop.org/show_bug.cgi?id=97471 Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/amdgpu/dce_v11_0.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) --- a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c +++ b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c @@ -443,16 +443,6 @@ static void dce_v11_0_hpd_init(struct am list_for_each_entry(connector, &dev->mode_config.connector_list, head) { struct amdgpu_connector *amdgpu_connector = to_amdgpu_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 (amdgpu_connector->hpd.hpd) { case AMDGPU_HPD_1: idx = 0; @@ -476,6 +466,19 @@ static void dce_v11_0_hpd_init(struct am continue; } + 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. + */ + tmp = RREG32(mmDC_HPD_INT_CONTROL + hpd_offsets[idx]); + tmp = REG_SET_FIELD(tmp, DC_HPD_INT_CONTROL, DC_HPD_INT_EN, 0); + WREG32(mmDC_HPD_INT_CONTROL + hpd_offsets[idx], tmp); + continue; + } + tmp = RREG32(mmDC_HPD_CONTROL + hpd_offsets[idx]); tmp = REG_SET_FIELD(tmp, DC_HPD_CONTROL, DC_HPD_EN, 1); WREG32(mmDC_HPD_CONTROL + hpd_offsets[idx], tmp);