From patchwork Tue Oct 6 09:47:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nautiyal, Ankit K" X-Patchwork-Id: 11818401 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 78592139A for ; Tue, 6 Oct 2020 09:54:42 +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 5203120674 for ; Tue, 6 Oct 2020 09:54:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5203120674 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 C51B489CF7; Tue, 6 Oct 2020 09:54:37 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id EC8B089CF7; Tue, 6 Oct 2020 09:54:36 +0000 (UTC) IronPort-SDR: 12GgTqTpPLmo8KcE08o5ij2Zv06jkQN1yb0oyAZpt8O93B/kSDwoDQYVCf0BKmDW0XQ0T2KcHr BooAsHht+2tg== X-IronPort-AV: E=McAfee;i="6000,8403,9765"; a="151361682" X-IronPort-AV: E=Sophos;i="5.77,342,1596524400"; d="scan'208";a="151361682" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Oct 2020 02:54:35 -0700 IronPort-SDR: BE5aHcqEaZ+6B3WLFk51PLIrmA0MzcW0RGgPRSzAXd2KsM82chtogmG2kwy+U6p61LYFG2CGJl adZTYaPxF1Xw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,342,1596524400"; d="scan'208";a="342171719" Received: from unknown (HELO linux-akn.iind.intel.com) ([10.223.34.148]) by fmsmga004.fm.intel.com with ESMTP; 06 Oct 2020 02:54:32 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org Subject: [RFC 2/8] drm/edid: Parse MAX_FRL field from HFVSDB block Date: Tue, 6 Oct 2020 15:17:13 +0530 Message-Id: <20201006094719.24119-3-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201006094719.24119-1-ankit.k.nautiyal@intel.com> References: <20201006094719.24119-1-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 | 50 +++++++++++++++++++++++++++++++++++++ include/drm/drm_connector.h | 6 +++++ 2 files changed, 56 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 631125b46e04..d468ac91abb6 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4849,6 +4849,51 @@ static void drm_parse_vcdb(struct drm_connector *connector, const u8 *db) info->rgb_quant_range_selectable = true; } +static void drm_parse_hdmi_21_additional_fields(struct drm_connector *connector, + const u8 *db) +{ + /* hf_vsdb 7:14 support needs to be added */ + + u8 max_frl_rate_per_lane; + struct drm_hdmi_info *hdmi = &connector->display_info.hdmi; + + max_frl_rate_per_lane = (db[7] & DRM_EDID_MAX_FRL_RATE_MASK) >> 4; + + switch(max_frl_rate_per_lane) { + case 0: + hdmi->max_lane = 0; + hdmi->max_frl_rate_per_lane = 0; + break; + case 1: + hdmi->max_lane = 3; + hdmi->max_frl_rate_per_lane = 3; + break; + case 2: + hdmi->max_lane = 3; + hdmi->max_frl_rate_per_lane = 6; + break; + case 3: + hdmi->max_lane = 4; + hdmi->max_frl_rate_per_lane = 6; + break; + case 4: + hdmi->max_lane = 4; + hdmi->max_frl_rate_per_lane = 8; + break; + case 5: + hdmi->max_lane = 4; + hdmi->max_frl_rate_per_lane = 10; + break; + case 6: + hdmi->max_lane = 4; + hdmi->max_frl_rate_per_lane = 12; + break; + default: + DRM_DEBUG_KMS("max frl rate per lane 0x%x, reserved\n", max_frl_rate_per_lane); + break; + } +} + static void drm_parse_ycbcr420_deep_color_info(struct drm_connector *connector, const u8 *db) { @@ -4902,6 +4947,11 @@ 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..aa6ae9c17ca4 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_lane: supported by sink */ + u8 max_lane; }; /**