From nobody Mon Feb 9 13:37:09 2026 Received: from mail-wm1-f44.google.com (mail-wm1-f44.google.com [209.85.128.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 95AEC22A4D3 for ; Mon, 7 Apr 2025 08:14:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.44 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744013687; cv=none; b=YRGAXVZSSrA9bycjoftIHZdFmjG5ryP9wtoe499R8JPHhaFbHbqegThV1MTk3k9ZnSKgaSlMQwtcWLWxXMntXhKVIAmADiU71ZPd+xEpNINUamDSyUMbbgECsS/xTjqUOB39x+rh4sIbGaoWExkVSUK9s3M6TysU53DS8AG2QxI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744013687; c=relaxed/simple; bh=Wi7ykHMtyPx1L0V++pfgxps2pB8dKAlH8vyEeYIBhdM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=l9W8L55bVfto+pV+VhJ7k944tr/j8lWNNojhEw7qwOSwwDq7kG4Hlg5/kMjMElY2u3hFcYz7bFN5kQfPGuiMTOCKIC+xXLrQZX8aP8AksYpKxOL6BdhdtfHCyf4baJTvoDlS15HarexwA1vbc1EB/ndQVFSIZg23bNbEE2KUnI8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Ay0U8lD+; arc=none smtp.client-ip=209.85.128.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Ay0U8lD+" Received: by mail-wm1-f44.google.com with SMTP id 5b1f17b1804b1-43cf58eea0fso20457885e9.0 for ; Mon, 07 Apr 2025 01:14:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1744013683; x=1744618483; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=f0WRLpCb7W4S/OASemBlBhF+MVaGI+eJr0lijF+1c3c=; b=Ay0U8lD+34h+pNsgZBd3OO5O1hS1a5g07m09KYD1UnvcEH3jStRxFTuVoCRklMdzfW WXGLrX8Kl+B6o4vbNtm9ktGUSTjSotgojQ0FSqqEM5SEZ4cdoOVYSBjW3EQmSg0pamNb 9IYTIKYJLTgTHkKrZozdblCoEwAVD/SSuHmLpStfzBdPPcXXbbOaWHAj1jXuUY44H4E9 uCVM1slLPX+ah5028HULOPfY8+mbc6qTE0mTVEpMxjjLQxF+pVzksyo24nvYwYQhFAyd W50HTai0YZqY+0V9ftprYxRErnylcxiIfsgIniaimb9hVYSI1YXax0ScxnKwVWWNcbBE PNWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744013683; x=1744618483; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=f0WRLpCb7W4S/OASemBlBhF+MVaGI+eJr0lijF+1c3c=; b=G4CdUkF9qCaVXferGC4EvLEb5vWe5j9CGdbVhRi2Xktff3a11PppK+/oOnueEw1/XW J+Xmf5rmk6zIpdtIzcIUUA3XBSv084uH9S16Gc4+B7P38m2/1v5uyoHIqH/9qUqfQ114 tRP8n2kX3vkTobWpPpE6+n3L5nlmpWeU48HHd0VXWDs8FTK/gI3OFiM6iya/iBQdoqyw +ma7Vg64lJX7MnTRfEtV27WQespxrb6twpHqU3bA3rzZNq7ckAgl/DD/0V8wJ7Q/32mx VtpnaYUXVfRPqCNYRIl05IlfGrYmWqhE7bb98OhF1VggrhP08982BwIeoHSF8gJIO5q1 Ao6Q== X-Forwarded-Encrypted: i=1; AJvYcCVdn28ytcLBzQQNlxBW5Od1QGt4bpX3cmSeDNGJsEmyMUT21cFQ1nLnudKuZXOXN9XkV8pfFTIMBokB2kY=@vger.kernel.org X-Gm-Message-State: AOJu0YzfduME/J1mYBJFr8wu/SLH1V0cEwrTVketZlgx+wTXQ4HIupKi bviuR9zeymrq49w0sCzJhSSvkcwXmG7Ixq0+oApu6hDJdthYLe+2 X-Gm-Gg: ASbGncsdIjv+HSnZuokbH1TWzzDlEFyncwWmJL4TlS4BI6pnPXrcVNUE4hGdP/MANq7 yY4gsumu2Xxz9VuZGb29hmUJPFHxTLKxtEqfCNwOxJOwtu6p30NfjVVO0LWub0ENIkVXpxGGWxN 2oGv7QV7w3COIDBB6zeDljMnmPtl3x7Ahm+qQabz2vOwfe/Eet4FEePQawGHFpDk2CC1QXYQrk5 XFYt6UgNoHgWrnN9LMtEiymB648B6e/aGDLVsd2dKQfFhzMvxitjEaFG/r/fejpM9g8VDDrWLrW rECJ+5IFKVeTCBqn/JiGPTxS+l7bZUM5T9bsEg1jYsOn X-Google-Smtp-Source: AGHT+IG/88e0b60/Y0C5GKyTtSCd9DooMjlQuLLois99UoJNmC+RM6Kq5lX/7f0WXIwo/PqsRyl+Rw== X-Received: by 2002:a05:600c:b95:b0:43c:fa0e:4713 with SMTP id 5b1f17b1804b1-43ecf81c336mr101643585e9.2.1744013682759; Mon, 07 Apr 2025 01:14:42 -0700 (PDT) Received: from fedora.. ([94.73.34.87]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43ec16a3aefsm125473445e9.21.2025.04.07.01.14.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Apr 2025 01:14:42 -0700 (PDT) From: =?UTF-8?q?Jos=C3=A9=20Exp=C3=B3sito?= To: louis.chauvet@bootlin.com Cc: hamohammed.sa@gmail.com, simona@ffwll.ch, melissa.srw@gmail.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Jos=C3=A9=20Exp=C3=B3sito?= Subject: [PATCH v4 08/16] drm/vkms: Allow to configure multiple encoders via configfs Date: Mon, 7 Apr 2025 10:14:17 +0200 Message-ID: <20250407081425.6420-9-jose.exposito89@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250407081425.6420-1-jose.exposito89@gmail.com> References: <20250407081425.6420-1-jose.exposito89@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable From: Louis Chauvet Create a default subgroup at /config/vkms/encoders to allow to create as many encoders as required. Signed-off-by: Louis Chauvet Co-developed-by: Jos=C3=A9 Exp=C3=B3sito Signed-off-by: Jos=C3=A9 Exp=C3=B3sito Reviewed-by: Louis Chauvet --- Documentation/gpu/vkms.rst | 6 ++ drivers/gpu/drm/vkms/vkms_configfs.c | 87 ++++++++++++++++++++++++++++ 2 files changed, 93 insertions(+) diff --git a/Documentation/gpu/vkms.rst b/Documentation/gpu/vkms.rst index 13b96837a266..e24767448775 100644 --- a/Documentation/gpu/vkms.rst +++ b/Documentation/gpu/vkms.rst @@ -76,6 +76,7 @@ And directories are created for each configurable item of= the display pipeline:: tree /config/vkms/my-vkms =E2=94=9C=E2=94=80=E2=94=80 crtcs =E2=94=9C=E2=94=80=E2=94=80 enabled + =E2=94=9C=E2=94=80=E2=94=80 encoders =E2=94=94=E2=94=80=E2=94=80 planes =20 To add items to the display pipeline, create one or more directories under= the @@ -98,6 +99,10 @@ CRTCs have 1 configurable attribute: =20 - writeback: Enable or disable writeback connector support by writing 1 or= 0 =20 +Next, create one or more encoders:: + + sudo mkdir /config/vkms/my-vkms/encoders/encoder0 + To finish the configuration, link the different pipeline items:: =20 sudo ln -s /config/vkms/my-vkms/crtcs/crtc0 /config/vkms/my-vkms/planes/= plane0/possible_crtcs @@ -119,6 +124,7 @@ And removing the top level directory and its subdirecto= ries:: sudo rm /config/vkms/my-vkms/planes/*/possible_crtcs/* sudo rmdir /config/vkms/my-vkms/planes/* sudo rmdir /config/vkms/my-vkms/crtcs/* + sudo rmdir /config/vkms/my-vkms/encoders/* sudo rmdir /config/vkms/my-vkms =20 Testing With IGT diff --git a/drivers/gpu/drm/vkms/vkms_configfs.c b/drivers/gpu/drm/vkms/vk= ms_configfs.c index 2cf97c2b6203..0df86e63570a 100644 --- a/drivers/gpu/drm/vkms/vkms_configfs.c +++ b/drivers/gpu/drm/vkms/vkms_configfs.c @@ -18,6 +18,7 @@ static bool is_configfs_registered; * Initialized when a new directory is created under "/config/vkms/" * @planes_group: Default subgroup of @group at "/config/vkms/planes" * @crtcs_group: Default subgroup of @group at "/config/vkms/crtcs" + * @encoders_group: Default subgroup of @group at "/config/vkms/encoders" * @lock: Lock used to project concurrent access to the configuration attr= ibutes * @config: Protected by @lock. Configuration of the VKMS device * @enabled: Protected by @lock. The device is created or destroyed when t= his @@ -27,6 +28,7 @@ struct vkms_configfs_device { struct config_group group; struct config_group planes_group; struct config_group crtcs_group; + struct config_group encoders_group; =20 struct mutex lock; struct vkms_config *config; @@ -63,6 +65,20 @@ struct vkms_configfs_crtc { struct vkms_config_crtc *config; }; =20 +/** + * struct vkms_configfs_encoder - Configfs representation of a encoder + * + * @group: Top level configuration group that represents a encoder. + * Initialized when a new directory is created under "/config/vkms/encoder= s" + * @dev: The vkms_configfs_device this encoder belongs to + * @config: Configuration of the VKMS encoder + */ +struct vkms_configfs_encoder { + struct config_group group; + struct vkms_configfs_device *dev; + struct vkms_config_encoder *config; +}; + #define device_item_to_vkms_configfs_device(item) \ container_of(to_config_group((item)), struct vkms_configfs_device, \ group) @@ -80,6 +96,10 @@ struct vkms_configfs_crtc { #define crtc_item_to_vkms_configfs_crtc(item) \ container_of(to_config_group((item)), struct vkms_configfs_crtc, group) =20 +#define encoder_item_to_vkms_configfs_encoder(item) \ + container_of(to_config_group((item)), struct vkms_configfs_encoder, \ + group) + static ssize_t crtc_writeback_show(struct config_item *item, char *page) { struct vkms_configfs_crtc *crtc; @@ -344,6 +364,69 @@ static const struct config_item_type plane_group_type = =3D { .ct_owner =3D THIS_MODULE, }; =20 +static void encoder_release(struct config_item *item) +{ + struct vkms_configfs_encoder *encoder; + struct mutex *lock; + + encoder =3D encoder_item_to_vkms_configfs_encoder(item); + lock =3D &encoder->dev->lock; + + scoped_guard(mutex, lock) { + vkms_config_destroy_encoder(encoder->dev->config, encoder->config); + kfree(encoder); + } +} + +static struct configfs_item_operations encoder_item_operations =3D { + .release =3D &encoder_release, +}; + +static const struct config_item_type encoder_item_type =3D { + .ct_item_ops =3D &encoder_item_operations, + .ct_owner =3D THIS_MODULE, +}; + +static struct config_group *make_encoder_group(struct config_group *group, + const char *name) +{ + struct vkms_configfs_device *dev; + struct vkms_configfs_encoder *encoder; + + dev =3D child_group_to_vkms_configfs_device(group); + + scoped_guard(mutex, &dev->lock) { + if (dev->enabled) + return ERR_PTR(-EBUSY); + + encoder =3D kzalloc(sizeof(*encoder), GFP_KERNEL); + if (!encoder) + return ERR_PTR(-ENOMEM); + + encoder->dev =3D dev; + + encoder->config =3D vkms_config_create_encoder(dev->config); + if (IS_ERR(encoder->config)) { + kfree(encoder); + return ERR_CAST(encoder->config); + } + + config_group_init_type_name(&encoder->group, name, + &encoder_item_type); + } + + return &encoder->group; +} + +static struct configfs_group_operations encoders_group_operations =3D { + .make_group =3D &make_encoder_group, +}; + +static const struct config_item_type encoder_group_type =3D { + .ct_group_ops =3D &encoders_group_operations, + .ct_owner =3D THIS_MODULE, +}; + static ssize_t device_enabled_show(struct config_item *item, char *page) { struct vkms_configfs_device *dev; @@ -447,6 +530,10 @@ static struct config_group *make_device_group(struct c= onfig_group *group, &crtc_group_type); configfs_add_default_group(&dev->crtcs_group, &dev->group); =20 + config_group_init_type_name(&dev->encoders_group, "encoders", + &encoder_group_type); + configfs_add_default_group(&dev->encoders_group, &dev->group); + return &dev->group; } =20 --=20 2.48.1