From patchwork Mon Jan 9 09:15:45 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Srinivas, Vidya" X-Patchwork-Id: 9504211 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 1C8A260710 for ; Mon, 9 Jan 2017 09:08:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1148A28442 for ; Mon, 9 Jan 2017 09:08:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 05F7328462; Mon, 9 Jan 2017 09:08:19 +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=-4.2 required=2.0 tests=BAYES_00, 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 BBD4B28442 for ; Mon, 9 Jan 2017 09:08:18 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 463C76E19D; Mon, 9 Jan 2017 09:08:16 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3DA1A6E19D for ; Mon, 9 Jan 2017 09:08:13 +0000 (UTC) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 09 Jan 2017 01:08:12 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos; i="5.33,339,1477983600"; d="scan'208"; a="1080804472" Received: from vsrini4-ubuntu-intel.iind.intel.com ([10.223.26.91]) by orsmga001.jf.intel.com with ESMTP; 09 Jan 2017 01:08:10 -0800 From: Vidya Srinivas To: intel-gfx@lists.freedesktop.org Date: Mon, 9 Jan 2017 14:45:45 +0530 Message-Id: <1483953345-26244-1-git-send-email-vidya.srinivas@intel.com> X-Mailer: git-send-email 1.9.1 Subject: [Intel-gfx] [PATCH 03/14] drm/i915: Fix PLL 8x/3 divider for MIPI video mode 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-Virus-Scanned: ClamAV using ClamSMTP From: Uma Shankar MIPI Video Mode for high res panels (requiring dual link), need a 8X/3 divider to be programmed as 0x2. Modifying the same in this patch. Signed-off-by: Uma Shankar --- drivers/gpu/drm/i915/intel_dsi_pll.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dsi_pll.c b/drivers/gpu/drm/i915/intel_dsi_pll.c index 61440e5..8b4fcc2 100644 --- a/drivers/gpu/drm/i915/intel_dsi_pll.c +++ b/drivers/gpu/drm/i915/intel_dsi_pll.c @@ -416,11 +416,13 @@ static void bxt_dsi_program_clocks(struct drm_device *dev, enum port port, rx_div_lower = rx_div & RX_DIVIDER_BIT_1_2; rx_div_upper = (rx_div & RX_DIVIDER_BIT_3_4) >> 2; - /* As per bpsec program the 8/3X clock divider to the below value */ - if (dev_priv->vbt.dsi.config->is_cmd_mode) - mipi_8by3_divider = 0x2; - else - mipi_8by3_divider = 0x3; + /* + * As per bpsec program the 8/3X clock divider to the below value + * The Value of 0x2 only, works for dual link Video Mode. 0x3 mentioned + * in bspec causes garbage screen and corrupted display. Programming it + * as 0x2 for both video and command mode. + */ + mipi_8by3_divider = 0x2; tmp |= BXT_MIPI_8X_BY3_DIVIDER(port, mipi_8by3_divider); tmp |= BXT_MIPI_TX_ESCLK_DIVIDER(port, tx_div);