From patchwork Fri Feb 16 14:20:19 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: 13560092 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 17567C48260 for ; Fri, 16 Feb 2024 14:27:27 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6256710EAF6; Fri, 16 Feb 2024 14:27:26 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="EsmG+cpK"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.19]) by gabe.freedesktop.org (Postfix) with ESMTPS id 50A4610EA34; Fri, 16 Feb 2024 14:27:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1708093644; x=1739629644; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=L7MRLdu+l2NlLRdf3eGQNzk4v2hfFYWYieoywhJY6lo=; b=EsmG+cpKQuWNO2lY9Dh+QmEeZk8a3UeinsptqgIAjfninKISYbLqy8Yt to5HoZCyLF92zqtcKOkEUuAVgDKXU0QJVKYMfalwFwwLNzTrdCT6VvWsi +Uy3E4w3XqFL/9RHOumUB+DtKH8TVLN5sCgo3XBPgAJiGLlvEPRE9pc0Y YDhELSxJ8UK749746hwZ/fsKQ6D3riurCVyqyVx7beJnyLRJytwhsdSYh AvyJehFgGEuar1pm+1VDOdN+K9bmNH4E6UpKTWz4M4xa4u4P/6VCd5a3k xEql2PkZzA2wjeo7kmL2sHUs3xKg7LArwnfwfZVPYtAACJbWt1VNhv8oF w==; X-IronPort-AV: E=McAfee;i="6600,9927,10985"; a="2076808" X-IronPort-AV: E=Sophos;i="6.06,164,1705392000"; d="scan'208";a="2076808" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Feb 2024 06:27:23 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,164,1705392000"; d="scan'208";a="3818335" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by fmviesa010.fm.intel.com with ESMTP; 16 Feb 2024 06:27:22 -0800 From: Mitul Golani To: intel-gfx@lists.freedesktop.org Cc: ankit.k.nautiyal@intel.com, dri-devel@lists.freedesktop.org, Mitul Golani Subject: [PATCH 1/6] drm/dp: Add an support to indicate if sink supports AS SDP Date: Fri, 16 Feb 2024 19:50:19 +0530 Message-Id: <20240216142024.1884258-2-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240216142024.1884258-1-mitulkumar.ajitkumar.golani@intel.com> References: <20240216142024.1884258-1-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 which indicates the sink support Adaptive Sync SDP, which can be used by the rest of the DP programming. Signed-off-by: Mitul Golani --- drivers/gpu/drm/display/drm_dp_helper.c | 25 +++++++++++++++++++++++++ include/drm/display/drm_dp_helper.h | 2 ++ 2 files changed, 27 insertions(+) diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index 8d6ce46471ae..81c5507928f5 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_get_pcon_max_frl_bw() - maximum frl supported by PCON * @dpcd: DisplayPort configuration data diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h index d02014a87f12..a0356721de0f 100644 --- a/include/drm/display/drm_dp_helper.h +++ b/include/drm/display/drm_dp_helper.h @@ -100,6 +100,8 @@ 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_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]); static inline int