From patchwork Fri Sep 25 12:13:35 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: 11799635 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 1B2DD6CB for ; Fri, 25 Sep 2020 12:21:15 +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 EAECF21D7A for ; Fri, 25 Sep 2020 12:21:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EAECF21D7A 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 07BCE6ECBB; Fri, 25 Sep 2020 12:21:06 +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 5D49E6ECB7; Fri, 25 Sep 2020 12:21:04 +0000 (UTC) IronPort-SDR: TKhyLo3PPXauUAbDDmh2+UqKwivSeSmIQIIaGyd2cyFzbhcTLn0kwmUnQL+G+SDNtdkAKFeHd4 MEX94ZX38WDg== X-IronPort-AV: E=McAfee;i="6000,8403,9754"; a="149163866" X-IronPort-AV: E=Sophos;i="5.77,301,1596524400"; d="scan'208";a="149163866" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Sep 2020 05:21:04 -0700 IronPort-SDR: g4kIww3VJVbx2OTPx4GhJo8k3lqhO3BqvsUJgsTixHej9BvINCKz9dJgLwMOoPXxPX7w43ScPU CJKRWRFCXaIw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,301,1596524400"; d="scan'208";a="383460370" Received: from unknown (HELO linux-akn.iind.intel.com) ([10.223.34.148]) by orsmga001.jf.intel.com with ESMTP; 25 Sep 2020 05:21:02 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org Subject: [RFC 2/7] drm/edid: Parse MAX_FRL field from HFVSDB block Date: Fri, 25 Sep 2020 17:43:35 +0530 Message-Id: <20200925121340.29497-3-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200925121340.29497-1-ankit.k.nautiyal@intel.com> References: <20200925121340.29497-1-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; }; /**