From patchwork Mon Jan 22 22:43:10 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Navare, Manasi" X-Patchwork-Id: 10179405 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 58AC760224 for ; Mon, 22 Jan 2018 22:40:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4A622285A3 for ; Mon, 22 Jan 2018 22:40:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3E3A8285A6; Mon, 22 Jan 2018 22:40:12 +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=unavailable 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 0ABB1285A3 for ; Mon, 22 Jan 2018 22:40:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B3C876E2DF; Mon, 22 Jan 2018 22:40:08 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTPS id 537E36E2DB; Mon, 22 Jan 2018 22:40:07 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 22 Jan 2018 14:40:06 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,398,1511856000"; d="scan'208";a="21461511" Received: from labuser-z97x-ud5h.jf.intel.com ([10.54.75.151]) by orsmga003.jf.intel.com with ESMTP; 22 Jan 2018 14:40:06 -0800 From: Manasi Navare To: intel-gfx@lists.freedesktop.org Subject: [PATCH 1/2] drm/dp: Add HBR3 support in existing DRM DP helpers Date: Mon, 22 Jan 2018 14:43:10 -0800 Message-Id: <1516660991-20697-1-git-send-email-manasi.d.navare@intel.com> X-Mailer: git-send-email 2.7.4 Cc: Manasi Navare , dri-devel@lists.freedesktop.org, Rodrigo Vivi X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Existing helpers add support upto HBR2. This patch adds support for HBR3 rate (8.1 Gbps) introduced as part of DP 1.4 specification. Cc: Rodrigo Vivi Cc: Jani Nikula Cc: dri-devel@lists.freedesktop.org Signed-off-by: Manasi Navare Reviewed-by: Harry Wentland --- drivers/gpu/drm/drm_dp_helper.c | 4 ++++ drivers/gpu/drm/drm_dp_mst_topology.c | 3 +++ include/drm/drm_dp_helper.h | 1 + 3 files changed, 8 insertions(+) diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index adf79be..ffe14ec 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -146,6 +146,8 @@ u8 drm_dp_link_rate_to_bw_code(int link_rate) return DP_LINK_BW_2_7; case 540000: return DP_LINK_BW_5_4; + case 810000: + return DP_LINK_BW_8_1; } } EXPORT_SYMBOL(drm_dp_link_rate_to_bw_code); @@ -161,6 +163,8 @@ int drm_dp_bw_code_to_link_rate(u8 link_bw) return 270000; case DP_LINK_BW_5_4: return 540000; + case DP_LINK_BW_8_1: + return 810000; } } EXPORT_SYMBOL(drm_dp_bw_code_to_link_rate); diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 70dcfa5..36df7df 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -2087,6 +2087,9 @@ static bool drm_dp_get_vc_payload_bw(int dp_link_bw, case DP_LINK_BW_5_4: *out = 10 * dp_link_count; break; + case DP_LINK_BW_8_1: + *out = 15 * dp_link_count; + break; } return true; } diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 9d3ce3b..c80fa92 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -334,6 +334,7 @@ # define DP_LINK_BW_1_62 0x06 # define DP_LINK_BW_2_7 0x0a # define DP_LINK_BW_5_4 0x14 /* 1.2 */ +# define DP_LINK_BW_8_1 0x1e /* 1.4 */ #define DP_LANE_COUNT_SET 0x101 # define DP_LANE_COUNT_MASK 0x0f