From patchwork Thu Jul 30 06:49:31 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Kahola X-Patchwork-Id: 6898801 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 6BF219F358 for ; Thu, 30 Jul 2015 06:47:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A50422052A for ; Thu, 30 Jul 2015 06:47:42 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id AB20E20527 for ; Thu, 30 Jul 2015 06:47:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 154F36E161; Wed, 29 Jul 2015 23:47:41 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTP id 1D0226E161 for ; Wed, 29 Jul 2015 23:47:39 -0700 (PDT) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP; 29 Jul 2015 23:47:39 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,575,1432623600"; d="scan'208";a="758182974" Received: from sorvi.fi.intel.com ([10.237.72.58]) by fmsmga001.fm.intel.com with ESMTP; 29 Jul 2015 23:47:37 -0700 From: Mika Kahola To: intel-gfx@lists.freedesktop.org Date: Thu, 30 Jul 2015 09:49:31 +0300 Message-Id: <1438238978-10638-5-git-send-email-mika.kahola@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1438238978-10638-1-git-send-email-mika.kahola@intel.com> References: <1438238978-10638-1-git-send-email-mika.kahola@intel.com> Subject: [Intel-gfx] [PATCH v2 04/11] drm/i915: LVDS pixel clock check 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: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" 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 X-Virus-Scanned: ClamAV using ClamSMTP It is possible the we request to have a mode that has higher pixel clock than our HW can support. This patch checks if requested pixel clock is lower than the one supported by the HW. The requested mode is discarded if we cannot support the requested pixel clock. This patch applies to LVDS. V2: - removed computation for max pixel clock Signed-off-by: Mika Kahola --- drivers/gpu/drm/i915/intel_lvds.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index cb634f4..5648295 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -289,11 +289,15 @@ intel_lvds_mode_valid(struct drm_connector *connector, { struct intel_connector *intel_connector = to_intel_connector(connector); struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode; + struct drm_i915_private *dev_priv = to_i915(connector->dev); + int max_pixclk = dev_priv->max_dotclk; if (mode->hdisplay > fixed_mode->hdisplay) return MODE_PANEL; if (mode->vdisplay > fixed_mode->vdisplay) return MODE_PANEL; + if (mode->clock > max_pixclk) + return MODE_CLOCK_HIGH; return MODE_OK; }