From patchwork Thu Feb 29 16:39:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Golani, Mitulkumar Ajitkumar" X-Patchwork-Id: 13577388 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id A09F2C54E49 for ; Thu, 29 Feb 2024 16:47:01 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7579010E4F4; Thu, 29 Feb 2024 16:46:55 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="CJNhq2dt"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id B5A0410E3F1; Thu, 29 Feb 2024 16:46:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1709225213; x=1740761213; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=5d+o6AveLfPDEtNEaODUT4IpiLyrgC/RqRd1WpkzX6I=; b=CJNhq2dtAGoa8KV4K2yZZN4B1RJaLhk7SaH7jcFFgjgq8HyMmpa4zHDw PqcPFOqaRQ6kfLt1zzZapOObrW0dbreEzITdjel5ntl83RV1NXlT0gxWv 1+mz3hxhisCB7GRF6uFPooVd8Wq8gxF7P/EiWGeEBRTzsA1zWihv0a2id /uPjlD0jGr6w21p+qPpmSHbs3bmB1yZdWZbdaHLFACKEVt9nICCl+G/sr TwacXF1lcYu6WiS9u/+jzb3PSyR/LBCQzzW2EUsFjViUaI/RQYCepVYb5 dH6E2wxCciw53Yd4mJlFxE2lReY0FfJsIjxiRPfN3IX1gCfQHsz6DMC86 Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10999"; a="3877564" X-IronPort-AV: E=Sophos;i="6.06,194,1705392000"; d="scan'208";a="3877564" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Feb 2024 08:46:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,194,1705392000"; d="scan'208";a="7811539" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by orviesa010.jf.intel.com with ESMTP; 29 Feb 2024 08:46:45 -0800 From: Mitul Golani To: intel-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org, jani.nikula@intel.com, ankit.k.nautiyal@intel.com, Mitul Golani Subject: [PATCH v14 1/9] drm/dp: Add support to indicate if sink supports AS SDP Date: Thu, 29 Feb 2024 22:09:49 +0530 Message-Id: <20240229163957.2948182-2-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240229163957.2948182-1-mitulkumar.ajitkumar.golani@intel.com> References: <20240229163957.2948182-1-mitulkumar.ajitkumar.golani@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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add an API that indicates support for Adaptive Sync SDP in the sink, which can be utilized by the rest of the DP programming. --v1: - Format commit message properly. Signed-off-by: Mitul Golani --- drivers/gpu/drm/display/drm_dp_helper.c | 25 +++++++++++++++++++++++++ include/drm/display/drm_dp_helper.h | 1 + 2 files changed, 26 insertions(+) diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index 9ac52cf5d4d8..f94c04db7187 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -2913,6 +2913,31 @@ void drm_dp_vsc_sdp_log(struct drm_printer *p, const struct drm_dp_vsc_sdp *vsc) } EXPORT_SYMBOL(drm_dp_vsc_sdp_log); +/** + * drm_dp_as_sdp_supported() - check if adaptive sync sdp is supported + * @aux: DisplayPort AUX channel + * @dpcd: DisplayPort configuration data + * + * Returns true if adaptive sync sdp is supported, else returns false + */ +bool drm_dp_as_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]) +{ + u8 rx_feature; + + if (dpcd[DP_DPCD_REV] < DP_DPCD_REV_13) + return false; + + if (drm_dp_dpcd_readb(aux, DP_DPRX_FEATURE_ENUMERATION_LIST_CONT_1, + &rx_feature) != 1) { + drm_dbg_dp(aux->drm_dev, + "Failed to read DP_DPRX_FEATURE_ENUMERATION_LIST_CONT_1\n"); + return false; + } + + return (rx_feature & DP_ADAPTIVE_SYNC_SDP_SUPPORTED); +} +EXPORT_SYMBOL(drm_dp_as_sdp_supported); + /** * drm_dp_vsc_sdp_supported() - check if vsc sdp is supported * @aux: DisplayPort AUX channel diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h index 0c1a4021e098..7c1aa3a703c8 100644 --- a/include/drm/display/drm_dp_helper.h +++ b/include/drm/display/drm_dp_helper.h @@ -101,6 +101,7 @@ struct drm_dp_vsc_sdp { void drm_dp_vsc_sdp_log(struct drm_printer *p, const struct drm_dp_vsc_sdp *vsc); bool drm_dp_vsc_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]); +bool drm_dp_as_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]); int drm_dp_psr_setup_time(const u8 psr_cap[EDP_PSR_RECEIVER_CAP_SIZE]);