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 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 C08C2C54E68 for ; Thu, 21 Mar 2024 15:45:01 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EF92510EE2D; Thu, 21 Mar 2024 15:45:00 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="B2DdfddZ"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) by gabe.freedesktop.org (Postfix) with ESMTPS id E634010EE08 for ; Thu, 21 Mar 2024 15:44:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1711035898; x=1742571898; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ELSmPRdpPHCWUf5t6+NNpogsoWYWWGjRdMnplQDfl70=; b=B2DdfddZ7eA+hSZ7k/viTGmAuV98PDTqHoEVz4zVaT0uqF/s2Ng0Dwax uLCMSklD/DCaw4NCjEDIxr6oUMLh+dorrl20MBB1jGqhuqnySpjhgoN1m 7O/90UN1qjfbbVMtDcRIMICbce6oldmvR/6xmey8ONQ+/6zP/B3ZQk1rB fOSWFLuA6u63X8eOz9mKQLYAi1U1GsvDf2lvWSKvo6TkCOB972ItliFrl 89TMZQJfKVxGezTeWoLuXGAvsF0YMLGfSWgO9a1ZpgKn6EI+DH7cT6vY+ mNcStqpRtJLBc2CoqZ89snSKUvtuO+NMDp1itIFev88mVi1phWgk/LNnk g==; X-IronPort-AV: E=McAfee;i="6600,9927,11020"; a="5867555" X-IronPort-AV: E=Sophos;i="6.07,143,1708416000"; d="scan'208";a="5867555" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Mar 2024 08:44:58 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,143,1708416000"; d="scan'208";a="19018745" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by fmviesa005.fm.intel.com with ESMTP; 21 Mar 2024 08:44:56 -0700 From: Mitul Golani To: intel-gfx@lists.freedesktop.org Cc: Mitul Golani , Ankit Nautiyal Subject: [PATCH v18 1/9] drm/dp: Add support to indicate if sink supports AS SDP Date: Thu, 21 Mar 2024 21:08:15 +0530 Message-Id: <20240321153828.3815870-2-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240311094238.3320888-2-mitulkumar.ajitkumar.golani@intel.com> References: <20240311094238.3320888-2-mitulkumar.ajitkumar.golani@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" 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 Reviewed-by: Ankit Nautiyal --- 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 f5d4be897866..5d7c6bab8e33 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -2948,6 +2948,31 @@ 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 a62fcd051d4d..7df19acdc790 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]); -- 2.25.1