From patchwork Tue May 7 13:17:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 13657048 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 7E074C25B4F for ; Tue, 7 May 2024 13:23:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=YeO7GnB4T/8KP6XgnoyXdK/798o+QvSwPhEJVTVAnIk=; b=CWaWZj0vNj+Fss paaOQyTaXL3cxJdzRIIHsiGIQQmw0ydIOaPhMlvzROMJdeiBUZSDNGcQG8ERxjldPPiSQ9dZQPLa9 BMAm7gZRxaCh1PhWYWY8bJUakYSkIsvoess1ZpgDoz6N7XpJ4JTgcs2lTmvSJ1tn1XAurFQN7tNIL rxgsNLESzzeRlc9amxGTldThgRyL3SyeH9LkkiUwOHEcNZtLrjK36jn4mQy70qKnHEpQTakhhval9 xNqd8FQPTmOYkDt3ZIZVF6uvKxzvM/LRIrreDju0hht01VC1eUaPHtBTANHMzd5lxxRv/GD9OybeF hjGxcvQpYv/SZavpQFBQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1s4Kmh-0000000BCy8-0r1j; Tue, 07 May 2024 13:23:07 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s4KiY-0000000B9yT-04Me; Tue, 07 May 2024 13:18:54 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 648B86179D; Tue, 7 May 2024 13:18:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5FC8C3277B; Tue, 7 May 2024 13:18:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1715087929; bh=jTBz0ob9iuEpIQKBkFz6nD4R8YQTfSw4yt4sHjlZsdU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=GEH8vOgCJLGrWu7Y08Ks/t+Ekqaihqy2odVwrXdL+O3CW93Kpq1SzeYkNtQxynhi/ 6rEmReyPRJT4I1Ec3yibsUZ0/edgi7eFt2D1HlWP/r/7jWu3p0Rl5apHidqcd+qY4t od8NKYLpRbaF3LR5xsKdXYL9bs7jcQ0HvtdVi/VnT+z8+4rmA7pekILmrdhMOal0/J SheWAXYEf0KDcVNC8OcHNGupMZFqDRUhSlm6b9ij8mBOMYkB3zaiU/Q89jFtz4gmOJ o/QUbEHkxzosvFx7t+8gdqww+4AAPpKB2FrLkT/FYHorJ18EeQvp8dGZayIK8sR6wR +/Q7J21nXF3tA== From: Maxime Ripard Date: Tue, 07 May 2024 15:17:41 +0200 Subject: [PATCH v13 23/28] drm/connector: hdmi: Create Infoframe DebugFS entries MIME-Version: 1.0 Message-Id: <20240507-kms-hdmi-connector-state-v13-23-8fafc5efe8be@kernel.org> References: <20240507-kms-hdmi-connector-state-v13-0-8fafc5efe8be@kernel.org> In-Reply-To: <20240507-kms-hdmi-connector-state-v13-0-8fafc5efe8be@kernel.org> To: Maarten Lankhorst , Thomas Zimmermann , David Airlie , Daniel Vetter , Jonathan Corbet , Sandy Huang , =?utf-8?q?Heiko_St=C3=BCbner?= , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Andy Yan Cc: Hans Verkuil , Sebastian Wick , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-sunxi@lists.linux.dev, Maxime Ripard X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=5419; i=mripard@kernel.org; h=from:subject:message-id; bh=jTBz0ob9iuEpIQKBkFz6nD4R8YQTfSw4yt4sHjlZsdU=; b=owGbwMvMwCmsHn9OcpHtvjLG02pJDGlWmh+bM4T/5s+98i7g9LpCac7kpsykF0V3P1aeFZhlw c+wdJdgx1QWBmFOBlkxRZYnMmGnl7cvrnKwX/kDZg4rE8gQBi5OAZiIRStjvXft0VDRBhvmsvCA aIY5z0S75Zzj618cLrvaGjVtpvEUnUMvT351qjn2onBVZMYSPfvPjA0rTi8Lt9w8x/ilvE55QOn ay+GG+/Xb1iftPdBSMSlh1eekxVMdfFsuteVW7Aora7nqvxQA X-Developer-Key: i=mripard@kernel.org; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240507_061850_630742_DDF84F57 X-CRM114-Status: GOOD ( 15.43 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org There has been some discussions recently about the infoframes sent by drivers and if they were properly generated. In parallel, there's been some interest in creating an infoframe-decode tool similar to edid-decode. Both would be much easier if we were to expose the infoframes programmed in the hardware. It won't be perfect since we have no guarantee that it's actually what goes through the wire, but it's the best we can do. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/drm_debugfs.c | 152 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 152 insertions(+) diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c index 08fcefd804bc..dd39a5b7a711 100644 --- a/drivers/gpu/drm/drm_debugfs.c +++ b/drivers/gpu/drm/drm_debugfs.c @@ -518,10 +518,160 @@ static const struct file_operations drm_connector_fops = { .llseek = seq_lseek, .release = single_release, .write = connector_write }; +#define HDMI_MAX_INFOFRAME_SIZE 29 + +static ssize_t +audio_infoframe_read(struct file *filp, char __user *ubuf, size_t count, loff_t *ppos) +{ + struct drm_connector_hdmi_infoframe *infoframe; + struct drm_connector *connector; + union hdmi_infoframe *frame; + u8 buf[HDMI_INFOFRAME_SIZE(AUDIO)]; + ssize_t len = 0; + + connector = filp->private_data; + mutex_lock(&connector->hdmi.infoframes.lock); + + infoframe = &connector->hdmi.infoframes.audio; + if (!infoframe->set) + goto out; + + frame = &infoframe->data; + len = hdmi_infoframe_pack(frame, buf, sizeof(buf)); + if (len < 0) + goto out; + + len = simple_read_from_buffer(ubuf, count, ppos, buf, len); + +out: + mutex_unlock(&connector->hdmi.infoframes.lock); + return len; +} + +static const struct file_operations audio_infoframe_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = audio_infoframe_read, +}; + +static int create_hdmi_audio_infoframe_file(struct drm_connector *connector, + struct dentry *parent) +{ + struct dentry *file; + + file = debugfs_create_file("audio", 0400, parent, connector, &audio_infoframe_fops); + if (IS_ERR(file)) + return PTR_ERR(file); + + return 0; +} + +#define DEFINE_INFOFRAME_FILE(_f) \ +static ssize_t _f##_read_infoframe(struct file *filp, \ + char __user *ubuf, \ + size_t count, \ + loff_t *ppos) \ +{ \ + struct drm_connector_hdmi_infoframe *infoframe; \ + struct drm_connector_state *conn_state; \ + struct drm_connector *connector; \ + union hdmi_infoframe *frame; \ + struct drm_device *dev; \ + u8 buf[HDMI_MAX_INFOFRAME_SIZE]; \ + ssize_t len = 0; \ + \ + connector = filp->private_data; \ + dev = connector->dev; \ + \ + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); \ + \ + conn_state = connector->state; \ + infoframe = &conn_state->hdmi.infoframes._f; \ + if (!infoframe->set) \ + goto out; \ + \ + frame = &infoframe->data; \ + len = hdmi_infoframe_pack(frame, buf, sizeof(buf)); \ + if (len < 0) \ + goto out; \ + \ + len = simple_read_from_buffer(ubuf, count, ppos, buf, len); \ + \ +out: \ + drm_modeset_unlock(&dev->mode_config.connection_mutex); \ + return len; \ +} \ +\ +static const struct file_operations _f##_infoframe_fops = { \ + .owner = THIS_MODULE, \ + .open = simple_open, \ + .read = _f##_read_infoframe, \ +}; \ +\ +static int create_hdmi_## _f ## _infoframe_file (struct drm_connector *connector, \ + struct dentry *parent) \ +{ \ + struct dentry *file; \ + \ + file = debugfs_create_file(#_f, 0400, parent, connector, & _f ## _infoframe_fops); \ + if (IS_ERR(file)) \ + return PTR_ERR(file); \ + \ + return 0; \ +} + +DEFINE_INFOFRAME_FILE(avi); +DEFINE_INFOFRAME_FILE(hdmi); +DEFINE_INFOFRAME_FILE(hdr_drm); +DEFINE_INFOFRAME_FILE(spd); + +static int create_hdmi_infoframe_files(struct drm_connector *connector, + struct dentry *parent) +{ + int ret; + + ret = create_hdmi_audio_infoframe_file(connector, parent); + if (ret) + return ret; + + ret = create_hdmi_avi_infoframe_file(connector, parent); + if (ret) + return ret; + + ret = create_hdmi_hdmi_infoframe_file(connector, parent); + if (ret) + return ret; + + ret = create_hdmi_hdr_drm_infoframe_file(connector, parent); + if (ret) + return ret; + + ret = create_hdmi_spd_infoframe_file(connector, parent); + if (ret) + return ret; + + return 0; +} + +static void hdmi_debugfs_add(struct drm_connector *connector) +{ + struct dentry *dir; + + if (!(connector->connector_type == DRM_MODE_CONNECTOR_HDMIA || + connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)) + return; + + dir = debugfs_create_dir("infoframes", connector->debugfs_entry); + if (IS_ERR(dir)) + return; + + create_hdmi_infoframe_files(connector, dir); +} + void drm_debugfs_connector_add(struct drm_connector *connector) { struct drm_device *dev = connector->dev; struct dentry *root; @@ -545,10 +695,12 @@ void drm_debugfs_connector_add(struct drm_connector *connector) /* max bpc */ debugfs_create_file("output_bpc", 0444, root, connector, &output_bpc_fops); + hdmi_debugfs_add(connector); + if (connector->funcs->debugfs_init) connector->funcs->debugfs_init(connector, root); } void drm_debugfs_connector_remove(struct drm_connector *connector)