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 C12A4C5AC9F for ; Fri, 7 Aug 2026 04:31:34 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 39B9010F342; Fri, 7 Aug 2026 04:31:31 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Q8RywNL7"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.19]) by gabe.freedesktop.org (Postfix) with ESMTPS id C2AD910F342; Fri, 7 Aug 2026 04:31:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1786077090; x=1817613090; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=e0P7AKuUX1LvMAIFwgeEgC2jXHbS9qzRUOL0AFOOdfA=; b=Q8RywNL7gqI2d+fM+J1xz3UWNtmKcDmFluyH73flTTLlvYKQ4CdVdPzE dyLIoMMHhgC9nxXGz8+ewYAFnK1zUWOxZEnkxamL7277+RP8OtPhIyIdc Dukyaq9Bgs5yGt5JD9e/4cRztqfEFtUvp+YA3gF0Q7ryr/oXyrFPIhEzN Z+nl3hAA0D+ouXLfNbJ+drDJL6TCLXfq2840ZywdGFtWVRAzIRUecCFct m9Ibk75rSZj3Zpd8bzYmWYjakvd4BEFCQTGhIZdaiuTA6DO2M2SBBCxeL iysmV4dzh8wwsNXWw5sVW+0Wlavo4P6s8Df7z4V5BkLd7Wns5WUrrY2Bk w==; X-CSE-ConnectionGUID: X2opfasBR1+rUtjykrmS4Q== X-CSE-MsgGUID: jXpHX9GmQIqTHdlxpfnMww== X-IronPort-AV: E=McAfee;i="6800,10657,11867"; a="86619233" X-IronPort-AV: E=Sophos;i="6.25,209,1779174000"; d="scan'208";a="86619233" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Aug 2026 21:31:29 -0700 X-CSE-ConnectionGUID: 7g0v9c7MSTmqbW5ZB8JoTw== X-CSE-MsgGUID: jNCFWTleQOiZEkNxJN1wCQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,209,1779174000"; d="scan'208";a="285666026" Received: from srr4-3-linux-103-aknautiy.iind.intel.com ([10.223.34.160]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Aug 2026 21:31:27 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org, jani.nikula@linux.intel.com, uma.shankar@intel.com, ville.syrjala@linux.intel.com, suraj.kandpal@intel.com Subject: [PATCH 01/44] drm/i915/hdmi: Parse frl max link rate from vbt Date: Fri, 7 Aug 2026 09:43:46 +0530 Message-ID: <20260807041430.229038-2-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260807041430.229038-1-ankit.k.nautiyal@intel.com> References: <20260807041430.229038-1-ankit.k.nautiyal@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" From: Vandita Kulkarni Parse the maximum FRL link rate from VBT and store it for use during FRL mode selection and link training. Signed-off-by: Vandita Kulkarni Signed-off-by: Ankit Nautiyal --- drivers/gpu/drm/i915/display/intel_bios.c | 53 +++++++++++++++++++ drivers/gpu/drm/i915/display/intel_bios.h | 1 + drivers/gpu/drm/i915/display/intel_vbt_defs.h | 7 +++ 3 files changed, 61 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index 97cbae2e547e..6354fa4041dc 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -2734,6 +2734,43 @@ static bool is_port_valid(struct intel_display *display, enum port port) return true; } +static int _intel_bios_hdmi_max_frl_rate(const struct intel_bios_encoder_data *devdata) +{ + struct intel_display *display = devdata->display; + + if (display->vbt.version >= 237 && + devdata->child.hdmi_max_frl_rate_valid) { + switch (devdata->child.hdmi_max_frl_rate) { + default: + case HDMI_MAX_FRL_RATE_PLATFORM: + drm_dbg_kms(display->drm, + "HDMI limited to support only TMDS modes\n"); + return 0; + case HDMI_MAX_FRL_RATE_3G: + return 3000000; + case HDMI_MAX_FRL_RATE_6G: + return 6000000; + case HDMI_MAX_FRL_RATE_8G: + return 8000000; + case HDMI_MAX_FRL_RATE_10G: + return 10000000; + case HDMI_MAX_FRL_RATE_12G: + return 12000000; + } + } + + /* + * When hdmi_max_frl_rate_valid is 0 + * Don't consider the hdmi_max_frl_rate for + * limiting the FRL Rates on FRL-capable displays + */ + if (display->vbt.version >= 237 && + display->platform.meteorlake) + return 12000000; + + return 0; +} + static void print_ddi_port(const struct intel_bios_encoder_data *devdata) { struct intel_display *display = devdata->display; @@ -2741,6 +2778,7 @@ static void print_ddi_port(const struct intel_bios_encoder_data *devdata) bool is_dvi, is_hdmi, is_dp, is_edp, is_dsi, is_crt, supports_typec_usb, supports_tbt; int dp_boost_level, dp_max_link_rate, hdmi_boost_level, hdmi_level_shift, max_tmds_clock; enum port port; + int hdmi_max_frl_rate; port = intel_bios_encoder_port(devdata); if (port == PORT_NONE) @@ -2806,6 +2844,12 @@ static void print_ddi_port(const struct intel_bios_encoder_data *devdata) "Port %c VBT DP max link rate: %d\n", port_name(port), dp_max_link_rate); + hdmi_max_frl_rate = _intel_bios_hdmi_max_frl_rate(devdata); + if (hdmi_max_frl_rate) + drm_dbg_kms(display->drm, + "VBT HDMI max frl rate for port %c: %d\n", + port_name(port), hdmi_max_frl_rate); + /* * FIXME need to implement support for VBT * vswing/preemph tables should this ever trigger. @@ -3879,3 +3923,12 @@ void intel_bios_debugfs_register(struct intel_display *display) debugfs_create_file("i915_vbt", 0444, display->drm->debugfs_root, display, &intel_bios_vbt_fops); } + +int intel_bios_hdmi_max_frl_rate(struct intel_encoder *encoder) +{ + struct intel_display *display = to_intel_display(encoder); + const struct intel_bios_encoder_data *devdata; + + devdata = intel_bios_encoder_data_lookup(display, encoder->port); + return _intel_bios_hdmi_max_frl_rate(devdata); +} diff --git a/drivers/gpu/drm/i915/display/intel_bios.h b/drivers/gpu/drm/i915/display/intel_bios.h index 75dff27b4228..53d46c9fa6e1 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.h +++ b/drivers/gpu/drm/i915/display/intel_bios.h @@ -102,6 +102,7 @@ int intel_bios_hdmi_max_tmds_clock(const struct intel_bios_encoder_data *devdata void intel_bios_for_each_encoder(struct intel_display *display, void (*func)(struct intel_display *display, const struct intel_bios_encoder_data *devdata)); +int intel_bios_hdmi_max_frl_rate(struct intel_encoder *encoder); void intel_bios_debugfs_register(struct intel_display *display); diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h index 0dc13d080e8a..db7484542dc0 100644 --- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h +++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h @@ -381,6 +381,13 @@ struct bdb_general_features { #define HDMI_MAX_DATA_RATE_340 4 /* 249+ */ #define HDMI_MAX_DATA_RATE_300 5 /* 249+ */ +#define HDMI_MAX_FRL_RATE_PLATFORM 0 /* 237 */ +#define HDMI_MAX_FRL_RATE_3G 1 /* 237 */ +#define HDMI_MAX_FRL_RATE_6G 2 /* 237 */ +#define HDMI_MAX_FRL_RATE_8G 3 /* 237 */ +#define HDMI_MAX_FRL_RATE_10G 4 /* 237 */ +#define HDMI_MAX_FRL_RATE_12G 5 /* 237 */ + #define LEGACY_CHILD_DEVICE_CONFIG_SIZE 33 /* DDC Bus DDI Type 155+ */ -- 2.50.1