From patchwork Mon Jan 11 19:09:20 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukas Wunner X-Patchwork-Id: 8008731 Return-Path: X-Original-To: patchwork-platform-driver-x86@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D3EF6BEEE5 for ; Mon, 11 Jan 2016 19:18:17 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E7DEE2024D for ; Mon, 11 Jan 2016 19:18:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F361D20279 for ; Mon, 11 Jan 2016 19:18:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932303AbcAKTSP (ORCPT ); Mon, 11 Jan 2016 14:18:15 -0500 Received: from mailout3.hostsharing.net ([176.9.242.54]:56807 "EHLO mailout3.hostsharing.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759277AbcAKTSO (ORCPT ); Mon, 11 Jan 2016 14:18:14 -0500 Received: from h08.hostsharing.net (h08.hostsharing.net [83.223.95.28]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mailout3.hostsharing.net (Postfix) with ESMTPS id C887A101C08DD; Mon, 11 Jan 2016 20:11:11 +0100 (CET) Received: from localhost (6-38-90-81.adsl.cmo.de [81.90.38.6]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by h08.hostsharing.net (Postfix) with ESMTPSA id E874F60F06FF; Mon, 11 Jan 2016 20:11:09 +0100 (CET) X-Mailbox-Line: From e9466eb3d66b5b30f1e93c3b3da79d8b9ad0830f Mon Sep 17 00:00:00 2001 Message-Id: In-Reply-To: References: From: Lukas Wunner Date: Mon, 11 Jan 2016 20:09:20 +0100 Subject: [PATCH v5 07/12] drm/nouveau: Switch DDC when reading the EDID To: dri-devel@lists.freedesktop.org, platform-driver-x86@vger.kernel.org Cc: nouveau@lists.freedesktop.org, Ben Skeggs Sender: platform-driver-x86-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The pre-retina MacBook Pro uses an LVDS panel and a gmux controller to switch the panel between its two GPUs. The panel mode in VBIOS is notoriously bogus on these machines. Use drm_get_edid_switcheroo() in lieu of drm_get_edid() on LVDS if the vga_switcheroo handler is capable of temporarily switching the panel's DDC lines to the discrete GPU. This allows us to retrieve the EDID if the panel is currently muxed to the integrated GPU. Likewise, ask vga_switcheroo to switch DDC before probing LVDS connectors. This only enables EDID probing on the pre-retina MBP (2008 - 2013). The retina MBP (2012 - present) uses eDP and gmux is not capable of switching AUX separately from the main link on these models. This will be addressed in later patches. List of pre-retina MBPs with dual GPUs, either or both Nvidia: [MBP 5,1 2008 nvidia MCP79 + G96 pre-retina 15"] [MBP 5,2 2009 nvidia MCP79 + G96 pre-retina 17"] [MBP 5,3 2009 nvidia MCP79 + G96 pre-retina 15"] [MBP 6,2 2010 intel ILK + nvidia GT216 pre-retina 15"] [MBP 6,1 2010 intel ILK + nvidia GT216 pre-retina 17"] [MBP 9,1 2012 intel IVB + nvidia GK107 pre-retina 15"] v3: Commit newly added due to introduction of drm_get_edid_switcheroo() wrapper which drivers need to opt-in to. v5: Rebase on "vga_switcheroo: Add handler flags infrastructure", i.e. call drm_get_edid_switcheroo() only if the handler indicates that DDC is switchable. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=88861 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=61115 Tested-by: Lukas Wunner [MBP 9,1 2012 intel IVB + nvidia GK107 pre-retina 15"] Signed-off-by: Lukas Wunner --- drivers/gpu/drm/nouveau/nouveau_connector.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index fcebfae..ae96ebc 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -27,6 +27,7 @@ #include #include +#include #include #include @@ -153,6 +154,17 @@ nouveau_connector_ddc_detect(struct drm_connector *connector) if (ret == 0) break; } else + if ((vga_switcheroo_handler_flags() & + VGA_SWITCHEROO_CAN_SWITCH_DDC) && + nv_encoder->dcb->type == DCB_OUTPUT_LVDS && + nv_encoder->i2c) { + int ret; + vga_switcheroo_lock_ddc(dev->pdev); + ret = nvkm_probe_i2c(nv_encoder->i2c, 0x50); + vga_switcheroo_unlock_ddc(dev->pdev); + if (ret) + break; + } else if (nv_encoder->i2c) { if (nvkm_probe_i2c(nv_encoder->i2c, 0x50)) break; @@ -265,7 +277,14 @@ nouveau_connector_detect(struct drm_connector *connector, bool force) nv_encoder = nouveau_connector_ddc_detect(connector); if (nv_encoder && (i2c = nv_encoder->i2c) != NULL) { - nv_connector->edid = drm_get_edid(connector, i2c); + if ((vga_switcheroo_handler_flags() & + VGA_SWITCHEROO_CAN_SWITCH_DDC) && + nv_connector->type == DCB_CONNECTOR_LVDS) + nv_connector->edid = drm_get_edid_switcheroo(connector, + i2c); + else + nv_connector->edid = drm_get_edid(connector, i2c); + drm_mode_connector_update_edid_property(connector, nv_connector->edid); if (!nv_connector->edid) {