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 59D0EC07545 for ; Wed, 25 Oct 2023 12:59:56 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BFA7410E650; Wed, 25 Oct 2023 12:59:55 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8617010E650 for ; Wed, 25 Oct 2023 12:59:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1698238793; x=1729774793; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=dGpZs6XmbdHe7Rf5YJaHHAME/AVKCHnkefo50Hms3tg=; b=mRgRDjovZlq8m8rA7QORmVCXpybJho9pOEjnC7qws8xJ4MO6Yj7ol1o4 6r0GumCt8N9O4PWbMS1CPMdr21bWVlmFc3upASLXrm92OOJ8iRVDcqFrZ kKh26tJhEBQ57Fl5dILLV+S/KZlFSnDBNDKeLvjv91DH6AxC4K7U240lX LEoLc9BlRLxCSDv5/OIZ5eznIVYkbLdhgSmM/ORs2VUKEjZs3Xrl1RJ6+ AqdcBxOJKyvxo3Bsma9yAWZJIJxElviw4tIUALQmFqV63trluvGmtWDtk MDMlPJVDnw9KyItkahmFpViyZAktxleHg3gVf7axxIsoqllSXz9fUENjy g==; X-IronPort-AV: E=McAfee;i="6600,9927,10873"; a="386183679" X-IronPort-AV: E=Sophos;i="6.03,250,1694761200"; d="scan'208";a="386183679" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Oct 2023 05:59:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10873"; a="735382666" X-IronPort-AV: E=Sophos;i="6.03,250,1694761200"; d="scan'208";a="735382666" Received: from stinkpipe.fi.intel.com (HELO stinkbox) ([10.237.72.74]) by orsmga006.jf.intel.com with SMTP; 25 Oct 2023 05:59:50 -0700 Received: by stinkbox (sSMTP sendmail emulation); Wed, 25 Oct 2023 15:59:49 +0300 Date: Wed, 25 Oct 2023 15:59:49 +0300 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= To: Stanislav Lisovskiy Message-ID: References: <20231018132400.1446-1-stanislav.lisovskiy@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20231018132400.1446-1-stanislav.lisovskiy@intel.com> X-Patchwork-Hint: comment Subject: Re: [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, intel-gfx@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Wed, Oct 18, 2023 at 04:24:00PM +0300, Stanislav Lisovskiy wrote: > 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) > > v4: - Apply the changes to proper function(Jani Nikula) > > Signed-off-by: Stanislav Lisovskiy > --- > .../drm/i915/display/intel_display_debugfs.c | 66 +++++++++++++++++++ > .../drm/i915/display/intel_display_types.h | 2 + > drivers/gpu/drm/i915/display/intel_dp.c | 6 +- > 3 files changed, 73 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c > index fbe75d47a165..9b810c6f96ea 100644 > --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c > +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c > @@ -1398,6 +1398,30 @@ 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 = 0; > + > + if (!encoder) > + return -ENODEV; > + > + crtc = connector->base.state->crtc; > + if (connector->base.status != connector_status_connected || !crtc) { > + ret = -ENODEV; Why do we need this extra complication? > + 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) > @@ -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 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); > + 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) { eDP missing > + 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 4f6835a7578e..6a9148232a9c 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"); That's going to cause excessive dmesg spam. > + > + return clock > i915->max_dotclk_freq || hdisplay > 5120 || > + intel_dp->force_bigjoiner_enable; > } > > static enum drm_mode_status > -- > 2.37.3 -- Ville Syrjälä Intel