From patchwork Fri Jun 15 17:44:06 2018 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: 10467171 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C5EA1601C2 for ; Fri, 15 Jun 2018 17:44:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B53EA28DEE for ; Fri, 15 Jun 2018 17:44:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AA0FA28E18; Fri, 15 Jun 2018 17:44:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6BA7C28DEE for ; Fri, 15 Jun 2018 17:44:17 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 967756EBE5; Fri, 15 Jun 2018 17:44:16 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1A5656EBE2 for ; Fri, 15 Jun 2018 17:44:15 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Jun 2018 10:44:14 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,228,1526367600"; d="scan'208";a="47407097" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.174]) by fmsmga007.fm.intel.com with SMTP; 15 Jun 2018 10:44:12 -0700 Received: by stinkbox (sSMTP sendmail emulation); Fri, 15 Jun 2018 20:44:12 +0300 From: Ville Syrjala To: intel-gfx@lists.freedesktop.org Date: Fri, 15 Jun 2018 20:44:06 +0300 Message-Id: <20180615174406.12258-3-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20180615174406.12258-1-ville.syrjala@linux.intel.com> References: <20180615174406.12258-1-ville.syrjala@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 3/3] drm/i915: Enforce max hdisplay/hblank_start limits on HSW/BDW FDI X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 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-Virus-Scanned: ClamAV using ClamSMTP From: Ville Syrjälä The PCH transcoder registers are only 12 bits wide for the hdisplay and hblank_start values. On HSW/BDW the CPU side registers are 13 bits wide. intel_mode_valid() only checks against the higher limit (since we don't know where the mode is to be used), so an extra check is required against the FDI limits. Signed-off-by: Ville Syrjälä Reviewed-by: Paulo Zanoni --- drivers/gpu/drm/i915/intel_crt.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index 95aa29cf2d9c..457b1a2d05b8 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -333,6 +333,10 @@ intel_crt_mode_valid(struct drm_connector *connector, (ironlake_get_lanes_required(mode->clock, 270000, 24) > 2)) return MODE_CLOCK_HIGH; + /* HSW/BDW FDI limited to 4k */ + if (mode->hdisplay > 4096) + return MODE_H_ILLEGAL; + return MODE_OK; } @@ -375,6 +379,11 @@ static bool hsw_crt_compute_config(struct intel_encoder *encoder, if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) return false; + /* HSW/BDW FDI limited to 4k */ + if (adjusted_mode->crtc_hdisplay > 4096 || + adjusted_mode->crtc_hblank_start > 4096) + return false; + pipe_config->has_pch_encoder = true; /* LPT FDI RX only supports 8bpc. */