From patchwork Tue Oct 21 10:54:33 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dheeraj Jamwal X-Patchwork-Id: 5119861 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 389A09F349 for ; Tue, 21 Oct 2014 11:51:55 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6F2D12010F for ; Tue, 21 Oct 2014 11:51:54 +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 95ECA200F4 for ; Tue, 21 Oct 2014 11:51:52 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 0943B11AD; Tue, 21 Oct 2014 11:10:15 +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 002B31127 for ; Tue, 21 Oct 2014 11:10:01 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id AD8861F9D0 for ; Tue, 21 Oct 2014 11:10:00 +0000 (UTC) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 21 Oct 2014 04:10:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,761,1406617200"; d="scan'208";a="617798465" Received: from ubuntu-desktop.png.intel.com ([10.221.122.25]) by fmsmga002.fm.intel.com with ESMTP; 21 Oct 2014 04:09:59 -0700 From: Dheeraj Jamwal To: ltsi-dev@lists.linuxfoundation.org Date: Tue, 21 Oct 2014 18:54:33 +0800 Message-Id: <1413889294-31328-674-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 0673/1094] drm/i915: Program Rcomp and band gap reset everytime we resume from power gate 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: Shobhit Kumar Signed-off-by: Shobhit Kumar Reviewed-by: Jani Nikula Signed-off-by: Daniel Vetter (cherry picked from commit 2095f9fc06f2222dd81866306f777cc5f52659ab) Signed-off-by: Dheeraj Jamwal --- drivers/gpu/drm/i915/intel_dsi.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c index 3365664..7ceb8c6 100644 --- a/drivers/gpu/drm/i915/intel_dsi.c +++ b/drivers/gpu/drm/i915/intel_dsi.c @@ -110,6 +110,15 @@ static void intel_dsi_device_ready(struct intel_encoder *encoder) DRM_DEBUG_KMS("\n"); + mutex_lock(&dev_priv->dpio_lock); + /* program rcomp for compliance, reduce from 50 ohms to 45 ohms + * needed everytime after power gate */ + vlv_flisdsi_write(dev_priv, 0x04, 0x0004); + mutex_unlock(&dev_priv->dpio_lock); + + /* bandgap reset is needed after everytime we do power gate */ + band_gap_reset(dev_priv); + val = I915_READ(MIPI_PORT_CTRL(pipe)); I915_WRITE(MIPI_PORT_CTRL(pipe), val | LP_OUTPUT_HOLD); usleep_range(1000, 1500); @@ -379,9 +388,6 @@ static void intel_dsi_mode_set(struct intel_encoder *intel_encoder) DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe)); - /* XXX: Location of the call */ - band_gap_reset(dev_priv); - /* escape clock divider, 20MHz, shared for A and C. device ready must be * off when doing this! txclkesc? */ tmp = I915_READ(MIPI_CTRL(0));