From patchwork Fri Jul 23 07:05:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lee Shawn C X-Patchwork-Id: 12395369 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C8D1AC432BE for ; Fri, 23 Jul 2021 06:58:45 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8FE9B60EAF for ; Fri, 23 Jul 2021 06:58:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 8FE9B60EAF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 27CA96FA4E; Fri, 23 Jul 2021 06:58:45 +0000 (UTC) Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2F5F06FA4C for ; Fri, 23 Jul 2021 06:58:38 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10053"; a="211829770" X-IronPort-AV: E=Sophos;i="5.84,263,1620716400"; d="scan'208";a="211829770" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jul 2021 23:58:37 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,263,1620716400"; d="scan'208";a="502405594" Received: from shawnle1-build-machine.itwn.intel.com ([10.5.253.12]) by FMSMGA003.fm.intel.com with ESMTP; 22 Jul 2021 23:58:36 -0700 From: Lee Shawn C To: intel-gfx@lists.freedesktop.org Date: Fri, 23 Jul 2021 15:05:45 +0800 Message-Id: <20210723070548.29315-5-shawn.c.lee@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210723070548.29315-1-shawn.c.lee@intel.com> References: <20210723070548.29315-1-shawn.c.lee@intel.com> Subject: [Intel-gfx] [V3 4/7] drm/i915/dsi: refine send MIPI DCS command sequence X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: cooper.chiou@intel.com, william.tseng@intel.com, jani.nikula@intel.com MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" According to chapter "Sending Commands to the Panel" in bspec #29738 and #49188. If driver try to send DCS long pakcet, we have to program TX payload register at first. And configure TX header HW register later. DSC long packet would not be sent properly if we don't follow this sequence. Cc: Ville Syrjala Cc: Jani Nikula Cc: Vandita Kulkarni Cc: Cooper Chiou Cc: William Tseng Signed-off-by: Lee Shawn C --- drivers/gpu/drm/i915/display/icl_dsi.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c index 1780830d9909..60413bbf565f 100644 --- a/drivers/gpu/drm/i915/display/icl_dsi.c +++ b/drivers/gpu/drm/i915/display/icl_dsi.c @@ -1807,11 +1807,6 @@ static ssize_t gen11_dsi_host_transfer(struct mipi_dsi_host *host, if (msg->flags & MIPI_DSI_MSG_USE_LPM) enable_lpdt = true; - /* send packet header */ - ret = dsi_send_pkt_hdr(intel_dsi_host, dsi_pkt, enable_lpdt); - if (ret < 0) - return ret; - /* only long packet contains payload */ if (mipi_dsi_packet_format_is_long(msg->type)) { ret = dsi_send_pkt_payld(intel_dsi_host, dsi_pkt); @@ -1819,6 +1814,11 @@ static ssize_t gen11_dsi_host_transfer(struct mipi_dsi_host *host, return ret; } + /* send packet header */ + ret = dsi_send_pkt_hdr(intel_dsi_host, dsi_pkt, enable_lpdt); + if (ret < 0) + return ret; + //TODO: add payload receive code if needed ret = sizeof(dsi_pkt.header) + dsi_pkt.payload_length;