From patchwork Tue Dec 1 13:08:33 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= X-Patchwork-Id: 7736981 Return-Path: X-Original-To: patchwork-intel-gfx@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 0CAB9BEEE1 for ; Tue, 1 Dec 2015 13:08:54 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 449CC206B0 for ; Tue, 1 Dec 2015 13:08:53 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 857062063B for ; Tue, 1 Dec 2015 13:08:52 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DF14772122; Tue, 1 Dec 2015 05:08:51 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id 3D2DE72122 for ; Tue, 1 Dec 2015 05:08:51 -0800 (PST) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP; 01 Dec 2015 05:08:50 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,369,1444719600"; d="scan'208";a="851394923" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.174]) by fmsmga001.fm.intel.com with SMTP; 01 Dec 2015 05:08:48 -0800 Received: by stinkbox (sSMTP sendmail emulation); Tue, 01 Dec 2015 15:08:47 +0200 From: ville.syrjala@linux.intel.com To: intel-gfx@lists.freedesktop.org Date: Tue, 1 Dec 2015 15:08:33 +0200 Message-Id: <1448975321-20192-3-git-send-email-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.4.10 In-Reply-To: <1448975321-20192-1-git-send-email-ville.syrjala@linux.intel.com> References: <1448975321-20192-1-git-send-email-ville.syrjala@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 02/10] drm/i915: Don't register CRT connectro when DDI E can't be used X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_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 X-Virus-Scanned: ClamAV using ClamSMTP From: Ville Syrjälä On HSW/BDW DDI A and E share 2 lanes, so when DDI A requires the shared lanes DDI E can't be used. The lanes are not suppsoed to be dynamically switched between the two uses, so there's no point in registering the CRT connector when DDI E has no lanes. Signed-off-by: Ville Syrjälä Reviewed-by: Paulo Zanoni --- drivers/gpu/drm/i915/intel_display.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index c3d5a7319ef4..e80387dd6582 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -14259,6 +14259,10 @@ static bool intel_crt_present(struct drm_device *dev) if (HAS_PCH_LPT(dev) && I915_READ(SFUSE_STRAP) & SFUSE_STRAP_CRT_DISABLED) return false; + /* DDI E can't be used if DDI A requires 4 lanes */ + if (HAS_DDI(dev) && I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_A_4_LANES) + return false; + if (IS_VALLEYVIEW(dev) && !dev_priv->vbt.int_crt_support) return false;