From patchwork Thu Oct 15 10:52:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ankit Nautiyal X-Patchwork-Id: 11839633 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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 711BCC433DF for ; Thu, 15 Oct 2020 11:00:15 +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 0290C212CC for ; Thu, 15 Oct 2020 11:00:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0290C212CC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 436FF89B48; Thu, 15 Oct 2020 11:00:08 +0000 (UTC) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 42EE689AA7; Thu, 15 Oct 2020 11:00:06 +0000 (UTC) IronPort-SDR: KI8eqGPr+19bp4lOHb2Mck4Ez9T0RjRRgLF7hEyGAGUSlS+U0/EPF0bysrOKVPsIfcWdpGBFRn t1UP1rTdHB8A== X-IronPort-AV: E=McAfee;i="6000,8403,9774"; a="163686065" X-IronPort-AV: E=Sophos;i="5.77,378,1596524400"; d="scan'208";a="163686065" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Oct 2020 04:00:06 -0700 IronPort-SDR: p2C2lGaEWnVNXM7O/1zATvtg0/0iPv+5yJiQX3hWwMg7Rp5h5/ys2X3ErXlru8pcBx+Z/pxYHM 2oJ30OU7QM4Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,378,1596524400"; d="scan'208";a="356949612" Received: from linux-akn.iind.intel.com ([10.223.34.148]) by FMSMGA003.fm.intel.com with ESMTP; 15 Oct 2020 04:00:04 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org Subject: [RFC 02/13] drm/edid: Parse MAX_FRL field from HFVSDB block Date: Thu, 15 Oct 2020 16:22:48 +0530 Message-Id: <20201015105259.27934-3-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201015105259.27934-1-ankit.k.nautiyal@intel.com> References: <20201015105259.27934-1-ankit.k.nautiyal@intel.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: vandita.kulkarni@intel.com, uma.shankar@intel.com, dri-devel@lists.freedesktop.org, swati2.sharma@intel.com MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Swati Sharma This patch parses MAX_FRL field to get the MAX rate in Gbps that the HDMI 2.1 panel can support in FRL mode. Source need this field to determine the optimal rate between the source and sink during FRL training. Signed-off-by: Sharma, Swati2 Signed-off-by: Ankit Nautiyal --- drivers/gpu/drm/drm_edid.c | 51 +++++++++++++++++++++++++++++++++++++ include/drm/drm_connector.h | 6 +++++ 2 files changed, 57 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 631125b46e04..8afb136e73f5 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4849,6 +4849,52 @@ static void drm_parse_vcdb(struct drm_connector *connector, const u8 *db) info->rgb_quant_range_selectable = true; } +static +void drm_get_max_frl_rate(int max_frl_rate, u8 *max_lanes, u8 *max_rate_per_lane) +{ + switch(max_frl_rate) { + case 1: + *max_lanes = 3; + *max_rate_per_lane = 3; + break; + case 2: + *max_lanes = 3; + *max_rate_per_lane = 6; + break; + case 3: + *max_lanes = 4; + *max_rate_per_lane = 6; + break; + case 4: + *max_lanes = 4; + *max_rate_per_lane = 8; + break; + case 5: + *max_lanes = 4; + *max_rate_per_lane = 10; + break; + case 6: + *max_lanes = 4; + *max_rate_per_lane = 12; + break; + case 0: + default: + *max_lanes = 0; + *max_rate_per_lane = 0; + } +} + +static void drm_parse_hdmi_21_additional_fields(struct drm_connector *connector, + const u8 *db) +{ + struct drm_hdmi_info *hdmi = &connector->display_info.hdmi; + u8 max_frl_rate; + + max_frl_rate = db[7] & DRM_EDID_MAX_FRL_RATE_MASK; + drm_get_max_frl_rate(max_frl_rate, &hdmi->max_lanes, + &hdmi->max_frl_rate_per_lane); +} + static void drm_parse_ycbcr420_deep_color_info(struct drm_connector *connector, const u8 *db) { @@ -4902,6 +4948,11 @@ static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector, } } + if (hf_vsdb[7]) { + DRM_DEBUG_KMS("hdmi_21 sink detected. parsing edid\n"); + drm_parse_hdmi_21_additional_fields(connector, hf_vsdb); + } + drm_parse_ycbcr420_deep_color_info(connector, hf_vsdb); } diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 928136556174..f351bf10c076 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -207,6 +207,12 @@ struct drm_hdmi_info { /** @y420_dc_modes: bitmap of deep color support index */ u8 y420_dc_modes; + + /** @max_frl_rate_per_lane: support fixed rate link */ + u8 max_frl_rate_per_lane; + + /** @max_lanes: supported by sink */ + u8 max_lanes; }; /**