From patchwork Tue Oct 11 06:34:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nautiyal, Ankit K" X-Patchwork-Id: 13003698 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 02E7FC433FE for ; Tue, 11 Oct 2022 06:35:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7A48F10E7BA; Tue, 11 Oct 2022 06:34:52 +0000 (UTC) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTPS id E9FEE10E7B5 for ; Tue, 11 Oct 2022 06:34:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1665470090; x=1697006090; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=cBaw+LzPIprtnVq70tYBsL3BWYAwm3JVEKd7Vtx2Suk=; b=FkIpPzPLPxEqDLphG3hM+RtrrBGoBq+9s7StqXsjEKjWmfW2kFROgayh CUfptdfhaEJgf1Yrs8eTxCPN0aKLvayHdBV3P0nsdejJ36WdrtVNzF83E 0QCuw/49eCZNvbBgc39e7jOiW/WKoh4mys4BiohyBr/0xGB4I6Pwg758r xD2s1rwh/wfCnUU6So7dP8rjCvQTnUtYylal3epdDDgu35TCc6zEO5vV5 pMnb4etpi9j+9jcGirBalUk4550SLwU3pJ6cNYq6FMuF0Ykgffb7UjWGh +iReXBfr5Rrq9ku2qNq/vrchV01MkQ3PVsvejB7yf5dC1Uw0a9P9XdkS3 g==; X-IronPort-AV: E=McAfee;i="6500,9779,10496"; a="302031877" X-IronPort-AV: E=Sophos;i="5.95,175,1661842800"; d="scan'208";a="302031877" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Oct 2022 23:34:50 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10496"; a="768680377" X-IronPort-AV: E=Sophos;i="5.95,175,1661842800"; d="scan'208";a="768680377" Received: from srr4-3-linux-103-aknautiy.iind.intel.com ([10.223.34.160]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Oct 2022 23:34:48 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org Date: Tue, 11 Oct 2022 12:04:47 +0530 Message-Id: <20221011063447.904649-9-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221011063447.904649-1-ankit.k.nautiyal@intel.com> References: <20221011063447.904649-1-ankit.k.nautiyal@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v3 8/8] 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. Signed-off-by: Ankit Nautiyal --- drivers/gpu/drm/i915/display/intel_dp.c | 52 ++++++++++++++++++------- 1 file changed, 39 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index af985c91f692..a7e4a71445d9 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -118,6 +118,7 @@ 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_dsc_compute_bpp(struct intel_dp *intel_dp, u8 dsc_max_bpc); static bool intel_dp_is_hdmi_2_1_sink(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) @@ -898,6 +899,32 @@ intel_dp_tmds_clock_valid(struct intel_dp *intel_dp, return MODE_OK; } +static int +intel_dp_frl_bw_valid(struct intel_dp *intel_dp, int target_clock, + int bpc, bool ycbcr_420_only) +{ + int target_bw; + int max_frl_bw; + int bpp = bpc * 3; + + if (ycbcr_420_only) + 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; + + 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, @@ -906,23 +933,24 @@ 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; - bool ycbcr_420_only; + bool ycbcr_420_only = drm_mode_is_420_only(info, 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; + /* Assume 8bpc for the HDMI2.1 FRL BW check */ + status = intel_dp_frl_bw_valid(intel_dp, target_clock, 8, ycbcr_420_only); - /* converting bw from Gbps to Kbps*/ - max_frl_bw = max_frl_bw * 1000000; + if (status != MODE_OK) { + if (ycbcr_420_only || + !connector->base.ycbcr_420_allowed || + !drm_mode_is_420_also(info, mode)) + return status; - if (target_bw > max_frl_bw) - return MODE_CLOCK_HIGH; + status = intel_dp_frl_bw_valid(intel_dp, target_clock, 8, true); + if (status != MODE_OK) + return status; + } return MODE_OK; } @@ -931,8 +959,6 @@ intel_dp_mode_valid_downstream(struct intel_connector *connector, target_clock > intel_dp->dfp.max_dotclock) return MODE_CLOCK_HIGH; - ycbcr_420_only = drm_mode_is_420_only(info, mode); - /* Assume 8bpc for the DP++/HDMI/DVI TMDS clock check */ status = intel_dp_tmds_clock_valid(intel_dp, target_clock, 8, ycbcr_420_only, true);