From patchwork Thu Oct 12 12:34:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanislav Lisovskiy X-Patchwork-Id: 13419222 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 F2165CDB46E for ; Thu, 12 Oct 2023 12:34:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7047310E03A; Thu, 12 Oct 2023 12:34:19 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id C365810E03A for ; Thu, 12 Oct 2023 12:34:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697114056; x=1728650056; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=2oqmdMR3Fh+DxQibuDFKDFDaqGpwXra6hSuIRi25eIk=; b=V3ard5Ws//G93PVvWsbhGgtfQ4HitK2ynWm4OkXs5Max52t7JO+Oa5/j URlO/zlOJTfSQG0o/7p55zwHnmtn8tSwI20sQ+ffSaBY2ZivXQ1PiOaw8 tGJlegZeZEHAL8F8eN2sDDkAt+NDUsAxJiKBZJ5txYZ3bPwq2LoBRvfHl Ygm/DfITkos28hGk8ZifrwNdBDQ0437Jy4kq2lzsS2NlDRc9COvfrhbm9 pkTG97uk5ka6o3eXD+r3M12HWIh8Fdvhc4bCxCGq+2hUJZwsz2VHxLBAU 8CSACZdQxbB1S+yKg3b+UpssQxuRJ1IQPAZzVY4PCrw+0FDz48dg9mDE5 Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10861"; a="384755534" X-IronPort-AV: E=Sophos;i="6.03,218,1694761200"; d="scan'208";a="384755534" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2023 05:34:14 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10861"; a="757993945" X-IronPort-AV: E=Sophos;i="6.03,218,1694761200"; d="scan'208";a="757993945" Received: from unknown (HELO slisovsk-Lenovo-ideapad-720S-13IKB.fi.intel.com) ([10.237.72.65]) by fmsmga007.fm.intel.com with ESMTP; 12 Oct 2023 05:34:11 -0700 From: Stanislav Lisovskiy To: intel-gfx@lists.freedesktop.org Date: Thu, 12 Oct 2023 15:34:11 +0300 Message-Id: <20231012123411.17241-1-stanislav.lisovskiy@intel.com> X-Mailer: git-send-email 2.37.3 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH] drm/i915: Add bigjoiner force enable option to debugfs 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: , Cc: jani.nikula@intel.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" For validation purposes, it might be useful to be able to force Bigjoiner mode, even if current dotclock/resolution do not require that. Lets add such to option to debugfs. v2: - Apparently intel_dp_need_bigjoiner can't be used, when debugfs entry is created so lets just check manually the DISPLAY_VER. v3: - Switch to intel_connector from drm_connector(Jani Nikula) - Remove redundant modeset lock(Jani Nikula) - Use kstrtobool_from_user for boolean value(Jani Nikula) Signed-off-by: Stanislav Lisovskiy --- .../drm/i915/display/intel_display_debugfs.c | 72 ++++++++++++++++++- .../drm/i915/display/intel_display_types.h | 2 + drivers/gpu/drm/i915/display/intel_dp.c | 6 +- 3 files changed, 76 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c index fbe75d47a165..dea7bbea83ba 100644 --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c @@ -1398,13 +1398,37 @@ out: drm_modeset_unlock(&dev->mode_config.connection_mutex); return ret; } +static int i915_bigjoiner_enable_show(struct seq_file *m, void *data) +{ + struct intel_connector *connector = to_intel_connector(m->private); + struct drm_crtc *crtc; + struct intel_encoder *encoder = intel_attached_encoder(connector); + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + int ret; + + if (!encoder) + return -ENODEV; + + crtc = connector->base.state->crtc; + if (connector->base.status != connector_status_connected || !crtc) { + ret = -ENODEV; + goto out; + } + + seq_printf(m, "Bigjoiner enable: %d\n", intel_dp->force_bigjoiner_enable); + +out: + + return ret; +} + static ssize_t i915_dsc_output_format_write(struct file *file, const char __user *ubuf, size_t len, loff_t *offp) { - struct drm_connector *connector = - ((struct seq_file *)file->private_data)->private; - struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector)); + struct seq_file *m = file->private_data; + struct intel_connector *connector = m->private; + struct intel_encoder *encoder = intel_attached_encoder(connector); struct intel_dp *intel_dp = enc_to_intel_dp(encoder); int dsc_output_format = 0; int ret; @@ -1419,12 +1443,39 @@ static ssize_t i915_dsc_output_format_write(struct file *file, return len; } +static ssize_t i915_bigjoiner_enable_fops_write(struct file *file, + const char __user *ubuf, + size_t len, loff_t *offp) +{ + struct drm_connector *connector = + ((struct seq_file *)file->private_data)->private; + struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector)); + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + bool bigjoiner_en = 0; + int ret; + + ret = kstrtobool_from_user(ubuf, len, &bigjoiner_en); + if (ret < 0) + return ret; + + intel_dp->force_bigjoiner_enable = bigjoiner_en; + *offp += len; + + return len; +} + static int i915_dsc_output_format_open(struct inode *inode, struct file *file) { return single_open(file, i915_dsc_output_format_show, inode->i_private); } +static int i915_bigjoiner_enable_open(struct inode *inode, + struct file *file) +{ + return single_open(file, i915_bigjoiner_enable_show, inode->i_private); +} + static const struct file_operations i915_dsc_output_format_fops = { .owner = THIS_MODULE, .open = i915_dsc_output_format_open, @@ -1434,6 +1485,15 @@ static const struct file_operations i915_dsc_output_format_fops = { .write = i915_dsc_output_format_write }; +static const struct file_operations i915_bigjoiner_enable_fops = { + .owner = THIS_MODULE, + .open = i915_bigjoiner_enable_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = i915_bigjoiner_enable_fops_write +}; + /* * Returns the Current CRTC's bpc. * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/i915_current_bpc @@ -1513,6 +1573,12 @@ void intel_connector_debugfs_add(struct intel_connector *intel_connector) connector, &i915_dsc_output_format_fops); } + if (DISPLAY_VER(dev_priv) >= 11 && + intel_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) { + debugfs_create_file("i915_bigjoiner_force_enable", 0644, root, + &intel_connector->base, &i915_bigjoiner_enable_fops); + } + if (connector->connector_type == DRM_MODE_CONNECTOR_DSI || connector->connector_type == DRM_MODE_CONNECTOR_eDP || connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort || diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 8d8b2f8d37a9..e0de6eeaf59e 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1753,6 +1753,8 @@ struct intel_dp { bool is_mst; int active_mst_links; + bool force_bigjoiner_enable; + /* connector directly attached - won't be use for modeset in mst world */ struct intel_connector *attached_connector; diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 0ef7cb8134b6..daf9bc0d6838 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -1153,7 +1153,11 @@ bool intel_dp_need_bigjoiner(struct intel_dp *intel_dp, if (!intel_dp_can_bigjoiner(intel_dp)) return false; - return clock > i915->max_dotclk_freq || hdisplay > 5120; + if (intel_dp->force_bigjoiner_enable) + drm_dbg_kms(&i915->drm, "Forcing bigjoiner mode\n"); + + return clock > i915->max_dotclk_freq || hdisplay > 5120 || + intel_dp->force_bigjoiner_enable; } static enum drm_mode_status