From patchwork Fri Jun 30 12:57:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nautiyal, Ankit K" X-Patchwork-Id: 13298177 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 957DFEB64DD for ; Fri, 30 Jun 2023 13:02:20 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 923C010E181; Fri, 30 Jun 2023 13:02:18 +0000 (UTC) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id 33DA810E166 for ; Fri, 30 Jun 2023 13:02:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1688130136; x=1719666136; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yKtVegOY01YuxgrkprywN2GdF2WyiLhnhlKXPhQIkdI=; b=FNszeKmDqoEoGJ9UwggWPjs4Xl5Lmt5PgXSky04NTFDAkz10/CUt7JVr Q1IDvQ9CH0uQBTq0CUIWmgVZuk5I5mdofR4hYH8kUjcP5WsrBHEZwY0eb BGB82UrvCAKhLRyFFpilzV2eFvlN2p33gbsV3ramtfxvCY9qLuL6DKvLJ VJO5Tjaq4NQDN34AiIe+RC/FAmFA1t1WsRgTU2vUqekRXt2G8u9Y0Z+j/ e9g+jkPXvC+Q0NzW77Azg78nBDRSgCLFpKRaigCmSNiwkWG+tj378OYFg yLGHqW/CkZp8a9m1iA7YBHtg5Jh3xk4z5hAkOIOpYjJNAtNfah+vNtNcv w==; X-IronPort-AV: E=McAfee;i="6600,9927,10756"; a="341970864" X-IronPort-AV: E=Sophos;i="6.01,170,1684825200"; d="scan'208";a="341970864" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Jun 2023 06:01:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10756"; a="752987998" X-IronPort-AV: E=Sophos;i="6.01,170,1684825200"; d="scan'208";a="752987998" Received: from srr4-3-linux-103-aknautiy.iind.intel.com ([10.223.34.160]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Jun 2023 06:01:42 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org Date: Fri, 30 Jun 2023 18:27:47 +0530 Message-Id: <20230630125748.4141993-2-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230630125748.4141993-1-ankit.k.nautiyal@intel.com> References: <20230630125748.4141993-1-ankit.k.nautiyal@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 1/2] drm/i915/dp: Fix FRL BW check for HDMI2.1 DFP 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" During FRL bandwidth check for downstream HDMI2.1 sink, the min BPC supported is incorrectly taken for DP, and the check does not consider ybcr420 only modes. This patch fixes the bandwidth calculation similar to the TMDS case, by taking min 8Bpc and considering Ycbcr420 only modes. v2: Check for both Pcon and Sink FRL capabilities. Signed-off-by: Ankit Nautiyal --- drivers/gpu/drm/i915/display/intel_dp.c | 60 ++++++++++++++++++------- 1 file changed, 43 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 9f40da20e88d..0d938f430856 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -120,6 +120,7 @@ bool intel_dp_is_edp(struct intel_dp *intel_dp) } static void intel_dp_unset_edid(struct intel_dp *intel_dp); +static int intel_dp_hdmi_sink_max_frl(struct intel_dp *intel_dp); /* Is link rate UHBR and thus 128b/132b? */ bool intel_dp_is_uhbr(const struct intel_crtc_state *crtc_state) @@ -1037,6 +1038,33 @@ intel_dp_tmds_clock_valid(struct intel_dp *intel_dp, return MODE_OK; } +static enum drm_mode_status +intel_dp_frl_bw_valid(struct intel_dp *intel_dp, int target_clock, + int bpc, enum intel_output_format sink_format) +{ + int target_bw; + int max_frl_bw; + int bpp = bpc * 3; + + if (sink_format == INTEL_OUTPUT_FORMAT_YCBCR420) + target_clock /= 2; + + target_bw = bpp * target_clock; + + /* check for MAX FRL BW for both PCON and HDMI2.1 sink */ + max_frl_bw = min(intel_dp->dfp.pcon_max_frl_bw, + intel_dp_hdmi_sink_max_frl(intel_dp)); + + /* converting bw from Gbps to Kbps*/ + max_frl_bw = max_frl_bw * 1000000; + + /* #FIXME check bandwidth with DSC if both PCON and HDMI sink support DSC */ + if (target_bw > max_frl_bw) + return MODE_CLOCK_HIGH; + + return MODE_OK; +} + static enum drm_mode_status intel_dp_mode_valid_downstream(struct intel_connector *connector, const struct drm_display_mode *mode, @@ -1045,23 +1073,23 @@ intel_dp_mode_valid_downstream(struct intel_connector *connector, struct intel_dp *intel_dp = intel_attached_dp(connector); const struct drm_display_info *info = &connector->base.display_info; enum drm_mode_status status; - enum intel_output_format sink_format; + enum intel_output_format sink_format = intel_dp_sink_format(connector, mode); /* If PCON supports FRL MODE, check FRL bandwidth constraints */ - if (intel_dp->dfp.pcon_max_frl_bw) { - int target_bw; - int max_frl_bw; - int bpp = intel_dp_mode_min_output_bpp(connector, mode); - - target_bw = bpp * target_clock; - - max_frl_bw = intel_dp->dfp.pcon_max_frl_bw; - - /* converting bw from Gbps to Kbps*/ - max_frl_bw = max_frl_bw * 1000000; - - if (target_bw > max_frl_bw) - return MODE_CLOCK_HIGH; + if (intel_dp->dfp.pcon_max_frl_bw && intel_dp_hdmi_sink_max_frl(intel_dp)) { + /* Assume 8bpc for the HDMI2.1 FRL BW check */ + status = intel_dp_frl_bw_valid(intel_dp, target_clock, 8, sink_format); + if (status != MODE_OK) { + if (sink_format == INTEL_OUTPUT_FORMAT_YCBCR420 || + !connector->base.ycbcr_420_allowed || + !drm_mode_is_420_also(info, mode)) + return status; + + sink_format = INTEL_OUTPUT_FORMAT_YCBCR420; + status = intel_dp_frl_bw_valid(intel_dp, target_clock, 8, sink_format); + if (status != MODE_OK) + return status; + } return MODE_OK; } @@ -1070,8 +1098,6 @@ intel_dp_mode_valid_downstream(struct intel_connector *connector, target_clock > intel_dp->dfp.max_dotclock) return MODE_CLOCK_HIGH; - sink_format = intel_dp_sink_format(connector, mode); - /* Assume 8bpc for the DP++/HDMI/DVI TMDS clock check */ status = intel_dp_tmds_clock_valid(intel_dp, target_clock, 8, sink_format, true);