From mboxrd@z Thu Jan 1 00:00:00 1970 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=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 0CF99C433FE for ; Tue, 8 Dec 2020 10:33:35 +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 A9F4D23A9D for ; Tue, 8 Dec 2020 10:33:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A9F4D23A9D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 390BA6E0BF; Tue, 8 Dec 2020 10:33:30 +0000 (UTC) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id CF0D46E0BE; Tue, 8 Dec 2020 10:33:28 +0000 (UTC) IronPort-SDR: LEose4KbvIOt/UNuuEs1O3knvaZebS5LrGw2lhyPig0uDMsocVCwDuvkdxwLikW9Fch3sbyrz9 tFlQaZRVPnWg== X-IronPort-AV: E=McAfee;i="6000,8403,9828"; a="258576513" X-IronPort-AV: E=Sophos;i="5.78,402,1599548400"; d="scan'208";a="258576513" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Dec 2020 02:33:26 -0800 IronPort-SDR: cACYdinbxwL7OyT6e2bbk3UfFRP09uka5HcEub/UX5XyGz/LFq3LfXWl92ONECeEhy0ej0fEV5 jjn6HYVJYrsA== X-IronPort-AV: E=Sophos;i="5.78,402,1599548400"; d="scan'208";a="317739141" Received: from mjgleeso-mobl.ger.corp.intel.com (HELO localhost) ([10.213.246.199]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Dec 2020 02:33:23 -0800 From: Jani Nikula To: Ankit Nautiyal , intel-gfx@lists.freedesktop.org In-Reply-To: <20201208075145.17389-1-ankit.k.nautiyal@intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20201208075145.17389-1-ankit.k.nautiyal@intel.com> Date: Tue, 08 Dec 2020 12:33:20 +0200 Message-ID: <87tuswa8pb.fsf@intel.com> MIME-Version: 1.0 Subject: Re: [Intel-gfx] [PATCH v4 00/16] Add support for DP-HDMI2.1 PCON 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: airlied@linux.ie, Daniel Vetter , dri-devel@lists.freedesktop.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Tue, 08 Dec 2020, Ankit Nautiyal wrote: > This patch series attempts to add support for a DP-HDMI2.1 Protocol > Convertor. The VESA spec for the HDMI2.1 PCON are proposed in Errata > E5 to DisplayPort_v2.0: > https://vesa.org/join-vesamemberships/member-downloads/?action=stamp&fileid=42299 > The details are mentioned in: > VESA DP-to-HDMI PCON Specification Standalone Document > https://groups.vesa.org/wg/DP/document/15651 > > This series starts with adding support for FRL (Fixed Rate Link) > Training between the PCON and HDMI2.1 sink. > As per HDMI2.1 specification, a new data-channel or lane is added in > FRL mode, by repurposing the TMDS clock Channel. Through FRL, higher > bit-rate can be supported, ie. up to 12 Gbps/lane (48 Gbps over 4 > lanes). > > With these patches, the HDMI2.1 PCON can be configured to achieve FRL > training based on the maximum FRL rate supported by the panel, source > and the PCON. > The approach is to add the support for FRL training between PCON and > HDMI2.1 sink and gradually add other blocks for supporting higher > resolutions and other HDMI2.1 features, that can be supported by pcon > for the sources that do not natively support HDMI2.1. > > This is done before the DP Link training between the source and PCON > is started. In case of FRL training is not achieved, the PCON will > work in the regular TMDS mode, without HDMI2.1 feature support. > Any interruption in FRL training between the PCON and HDMI2.1 sink is > notified through IRQ_HPD. On receiving the IRQ_HPD the concerned DPCD > registers are read and FRL training is re-attempted. > > Currently, we have tested the FRL training and are able to enable 4K > display with TGL Platform + Realtek PCON RTD2173 with HDMI2.1 supporting > panel. Per IRC chat with Maarten and Daniel, once all the reviews are in, I'll add a topic branch and apply the patches there, so we can merge the branch to both drm-misc-next and drm-intel-next. BR, Jani. -- Jani Nikula, Intel Open Source Graphics Center _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx From mboxrd@z Thu Jan 1 00:00:00 1970 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=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 DD19EC4361B for ; Tue, 8 Dec 2020 10:33:30 +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 9D54723A9D for ; Tue, 8 Dec 2020 10:33:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9D54723A9D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.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 4CAAA6E0BE; Tue, 8 Dec 2020 10:33:29 +0000 (UTC) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id CF0D46E0BE; Tue, 8 Dec 2020 10:33:28 +0000 (UTC) IronPort-SDR: LEose4KbvIOt/UNuuEs1O3knvaZebS5LrGw2lhyPig0uDMsocVCwDuvkdxwLikW9Fch3sbyrz9 tFlQaZRVPnWg== X-IronPort-AV: E=McAfee;i="6000,8403,9828"; a="258576513" X-IronPort-AV: E=Sophos;i="5.78,402,1599548400"; d="scan'208";a="258576513" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Dec 2020 02:33:26 -0800 IronPort-SDR: cACYdinbxwL7OyT6e2bbk3UfFRP09uka5HcEub/UX5XyGz/LFq3LfXWl92ONECeEhy0ej0fEV5 jjn6HYVJYrsA== X-IronPort-AV: E=Sophos;i="5.78,402,1599548400"; d="scan'208";a="317739141" Received: from mjgleeso-mobl.ger.corp.intel.com (HELO localhost) ([10.213.246.199]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Dec 2020 02:33:23 -0800 From: Jani Nikula To: Ankit Nautiyal , intel-gfx@lists.freedesktop.org Subject: Re: [PATCH v4 00/16] Add support for DP-HDMI2.1 PCON In-Reply-To: <20201208075145.17389-1-ankit.k.nautiyal@intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20201208075145.17389-1-ankit.k.nautiyal@intel.com> Date: Tue, 08 Dec 2020 12:33:20 +0200 Message-ID: <87tuswa8pb.fsf@intel.com> MIME-Version: 1.0 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: airlied@linux.ie, Daniel Vetter , dri-devel@lists.freedesktop.org, vandita.kulkarni@intel.com, uma.shankar@intel.com, swati2.sharma@intel.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Tue, 08 Dec 2020, Ankit Nautiyal wrote: > This patch series attempts to add support for a DP-HDMI2.1 Protocol > Convertor. The VESA spec for the HDMI2.1 PCON are proposed in Errata > E5 to DisplayPort_v2.0: > https://vesa.org/join-vesamemberships/member-downloads/?action=stamp&fileid=42299 > The details are mentioned in: > VESA DP-to-HDMI PCON Specification Standalone Document > https://groups.vesa.org/wg/DP/document/15651 > > This series starts with adding support for FRL (Fixed Rate Link) > Training between the PCON and HDMI2.1 sink. > As per HDMI2.1 specification, a new data-channel or lane is added in > FRL mode, by repurposing the TMDS clock Channel. Through FRL, higher > bit-rate can be supported, ie. up to 12 Gbps/lane (48 Gbps over 4 > lanes). > > With these patches, the HDMI2.1 PCON can be configured to achieve FRL > training based on the maximum FRL rate supported by the panel, source > and the PCON. > The approach is to add the support for FRL training between PCON and > HDMI2.1 sink and gradually add other blocks for supporting higher > resolutions and other HDMI2.1 features, that can be supported by pcon > for the sources that do not natively support HDMI2.1. > > This is done before the DP Link training between the source and PCON > is started. In case of FRL training is not achieved, the PCON will > work in the regular TMDS mode, without HDMI2.1 feature support. > Any interruption in FRL training between the PCON and HDMI2.1 sink is > notified through IRQ_HPD. On receiving the IRQ_HPD the concerned DPCD > registers are read and FRL training is re-attempted. > > Currently, we have tested the FRL training and are able to enable 4K > display with TGL Platform + Realtek PCON RTD2173 with HDMI2.1 supporting > panel. Per IRC chat with Maarten and Daniel, once all the reviews are in, I'll add a topic branch and apply the patches there, so we can merge the branch to both drm-misc-next and drm-intel-next. BR, Jani. -- Jani Nikula, Intel Open Source Graphics Center _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel