From patchwork Tue Oct 21 10:52:34 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dheeraj Jamwal X-Patchwork-Id: 5118651 Return-Path: X-Original-To: patchwork-ltsi-dev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0563B9F349 for ; Tue, 21 Oct 2014 11:42:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 203B52010F for ; Tue, 21 Oct 2014 11:42:41 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id F0FE3200E8 for ; Tue, 21 Oct 2014 11:42:39 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id C33C3C67; Tue, 21 Oct 2014 11:07:52 +0000 (UTC) X-Original-To: ltsi-dev@lists.linuxfoundation.org Delivered-To: ltsi-dev@mail.linuxfoundation.org Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id D81771061 for ; Tue, 21 Oct 2014 11:07:50 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 8BDC0201F0 for ; Tue, 21 Oct 2014 11:07:49 +0000 (UTC) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP; 21 Oct 2014 04:07:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,761,1406617200"; d="scan'208";a="617797199" Received: from ubuntu-desktop.png.intel.com ([10.221.122.25]) by fmsmga002.fm.intel.com with ESMTP; 21 Oct 2014 04:07:48 -0700 From: Dheeraj Jamwal To: ltsi-dev@lists.linuxfoundation.org Date: Tue, 21 Oct 2014 18:52:34 +0800 Message-Id: <1413889294-31328-555-git-send-email-dheerajx.s.jamwal@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1413889294-31328-1-git-send-email-dheerajx.s.jamwal@intel.com> References: <1413889294-31328-1-git-send-email-dheerajx.s.jamwal@intel.com> X-Spam-Status: No, score=-5.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org Subject: [LTSI-dev] [PATCH 0554/1094] drm/i915: Don't check gmch state on inherited configs X-BeenThere: ltsi-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "A list to discuss patches, development, and other things related to the LTSI project" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: ltsi-dev-bounces@lists.linuxfoundation.org Errors-To: ltsi-dev-bounces@lists.linuxfoundation.org X-Virus-Scanned: ClamAV using ClamSMTP From: Daniel Vetter ... our current modeset code isn't good enough yet to handle this. The scenario is: 1. BIOS sets up a cloned config with lvds+external screen on the same pipe, e.g. pipe B. 2. We read out that state for pipe B and assign the gmch_pfit state to it. 3. The initial modeset switches the lvds to pipe A but due to lack of atomic modeset we don't recompute the config of pipe B. -> both pipes now claim (in the sw pipe config structure) to use the gmch_pfit, which just won't work. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=74081 Tested-by: max Cc: Alan Stern Cc: stable@vger.kernel.org Signed-off-by: Daniel Vetter Signed-off-by: Jani Nikula (cherry picked from commit 9953599bc02dbc1d3330e6a0bfc6c50e9dffcac6) Signed-off-by: Dheeraj Jamwal --- drivers/gpu/drm/i915/intel_display.c | 23 ++++++++++++++++++----- drivers/gpu/drm/i915/intel_drv.h | 3 ++- 2 files changed, 20 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 0cf6638..3abd491 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -9652,11 +9652,22 @@ intel_pipe_config_compare(struct drm_device *dev, PIPE_CONF_CHECK_I(pipe_src_w); PIPE_CONF_CHECK_I(pipe_src_h); - PIPE_CONF_CHECK_I(gmch_pfit.control); - /* pfit ratios are autocomputed by the hw on gen4+ */ - if (INTEL_INFO(dev)->gen < 4) - PIPE_CONF_CHECK_I(gmch_pfit.pgm_ratios); - PIPE_CONF_CHECK_I(gmch_pfit.lvds_border_bits); + /* + * FIXME: BIOS likes to set up a cloned config with lvds+external + * screen. Since we don't yet re-compute the pipe config when moving + * just the lvds port away to another pipe the sw tracking won't match. + * + * Proper atomic modesets with recomputed global state will fix this. + * Until then just don't check gmch state for inherited modes. + */ + if (!PIPE_CONF_QUIRK(PIPE_CONFIG_QUIRK_INHERITED_MODE)) { + PIPE_CONF_CHECK_I(gmch_pfit.control); + /* pfit ratios are autocomputed by the hw on gen4+ */ + if (INTEL_INFO(dev)->gen < 4) + PIPE_CONF_CHECK_I(gmch_pfit.pgm_ratios); + PIPE_CONF_CHECK_I(gmch_pfit.lvds_border_bits); + } + PIPE_CONF_CHECK_I(pch_pfit.enabled); if (current_config->pch_pfit.enabled) { PIPE_CONF_CHECK_I(pch_pfit.pos); @@ -11614,6 +11625,8 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev) base.head) { memset(&crtc->config, 0, sizeof(crtc->config)); + crtc->config.quirks |= PIPE_CONFIG_QUIRK_INHERITED_MODE; + crtc->active = dev_priv->display.get_pipe_config(crtc, &crtc->config); diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 0542de9..328b1a7 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -236,7 +236,8 @@ struct intel_crtc_config { * tracked with quirk flags so that fastboot and state checker can act * accordingly. */ -#define PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS (1<<0) /* unreliable sync mode.flags */ +#define PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS (1<<0) /* unreliable sync mode.flags */ +#define PIPE_CONFIG_QUIRK_INHERITED_MODE (1<<1) /* mode inherited from firmware */ unsigned long quirks; /* User requested mode, only valid as a starting point to