From patchwork Mon Feb 20 11:12:31 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: 13146301 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 D3CBBC05027 for ; Mon, 20 Feb 2023 11:15:48 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 164BA10E68B; Mon, 20 Feb 2023 11:15:48 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 09BC510E696 for ; Mon, 20 Feb 2023 11:15:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1676891741; x=1708427741; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yydH+dN+HzpeamYEUZUF0giyy3/pAVtFVmTkDZ0tUhk=; b=HA5V9ek1VpU9iAO26Wm5poo6VGh9t6EtQj2djHEsdhW4PYJd/mbfv7M8 WV1b8XLrrCAHUXdjorP8Q1K6QFTVW8SqCkrXU4L0F4cbjAAD/HfLUZT80 66xt8ZXAlUrhGICv7sZrRz8dJJtNf7+JjgYVo39fBNy2fZ/6GXVFMQbGt 7JUDq2aziql+TvUP4y+CPZO+IigwdOg79GnOh5HR/9AdzBgLws0+4KFW3 +9W16hRQHeIkfmkbetIPAnnRpybs5tUaC0tGokzLxblBt08T/yKeKbET+ hOG2Gygta98RXUcrBsYL74h2mOD/reILsmVXs1PKdsjRBM2CveYJasfva g==; X-IronPort-AV: E=McAfee;i="6500,9779,10626"; a="397061818" X-IronPort-AV: E=Sophos;i="5.97,312,1669104000"; d="scan'208";a="397061818" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Feb 2023 03:15:40 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10626"; a="740013166" X-IronPort-AV: E=Sophos;i="5.97,312,1669104000"; d="scan'208";a="740013166" Received: from srr4-3-linux-103-aknautiy.iind.intel.com ([10.223.34.160]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Feb 2023 03:15:39 -0800 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org Date: Mon, 20 Feb 2023 16:42:31 +0530 Message-Id: <20230220111232.3383820-14-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230220111232.3383820-1-ankit.k.nautiyal@intel.com> References: <20230220111232.3383820-1-ankit.k.nautiyal@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 13/14] 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: Rebase Signed-off-by: Ankit Nautiyal --- drivers/gpu/drm/i915/display/intel_dp.c | 64 +++++++++++++++++-------- 1 file changed, 45 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 517bfedcdb53..1dcf33c75e75 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 bool intel_dp_is_hdmi_2_1_sink(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) @@ -1029,6 +1030,32 @@ 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; + + 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, @@ -1037,24 +1064,30 @@ 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); enum intel_output_format sink_format; + 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; - - /* converting bw from Gbps to Kbps*/ - max_frl_bw = max_frl_bw * 1000000; + if (ycbcr_420_only && connector->base.ycbcr_420_allowed) + sink_format = INTEL_OUTPUT_FORMAT_YCBCR420; + else + sink_format = INTEL_OUTPUT_FORMAT_RGB; - if (target_bw > max_frl_bw) - return MODE_CLOCK_HIGH; + /* 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 || + !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; } @@ -1063,13 +1096,6 @@ 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); - - if (ycbcr_420_only && connector->base.ycbcr_420_allowed) - sink_format = INTEL_OUTPUT_FORMAT_YCBCR420; - else - sink_format = INTEL_OUTPUT_FORMAT_RGB; - /* Assume 8bpc for the DP++/HDMI/DVI TMDS clock check */ status = intel_dp_tmds_clock_valid(intel_dp, target_clock, 8, sink_format, true);