linux-kernel - [PATCH RFC 07/15] drm/vkms: Introduce plane name configuration

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Message-Id: <20240814-google-remove-crtc-index-from-parameter-v1-7-6e179abf9fd4@bootlin.com>
Date: Wed, 14 Aug 2024 16:36:29 +0200
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>, 
 Melissa Wen <melissa.srw@...il.com>, 
 Maíra Canal <mairacanal@...eup.net>, 
 Haneen Mohammed <hamohammed.sa@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>
Cc: dri-devel@...ts.freedesktop.org, arthurgrillo@...eup.net, 
 linux-kernel@...r.kernel.org, jeremie.dautheribes@...tlin.com, 
 miquel.raynal@...tlin.com, thomas.petazzoni@...tlin.com, 
 seanpaul@...gle.com, nicolejadeyee@...gle.com, 
 Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH RFC 07/15] drm/vkms: Introduce plane name configuration

As a plane will be a folder in ConfigFS, add name configuration for plane
so it will reflect the folder name.

Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
 drivers/gpu/drm/vkms/vkms_config.c | 14 ++++++++++++++
 drivers/gpu/drm/vkms/vkms_config.h |  2 ++
 drivers/gpu/drm/vkms/vkms_plane.c  |  2 +-
 3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vkms/vkms_config.c b/drivers/gpu/drm/vkms/vkms_config.c
index b1c6160d350f..b8e235a22e90 100644
--- a/drivers/gpu/drm/vkms/vkms_config.c
+++ b/drivers/gpu/drm/vkms/vkms_config.c
@@ -34,6 +34,10 @@ struct vkms_config *vkms_config_alloc_default(bool enable_writeback, bool enable
 		goto err_alloc;
 
 	plane->type = DRM_PLANE_TYPE_PRIMARY;
+	plane->name = kzalloc(sizeof("primary"), GFP_KERNEL);
+	if (!plane->name)
+		goto err_alloc;
+	sprintf(plane->name, "primary");
 
 	if (enable_overlay) {
 		for (int i = 0; i < NUM_OVERLAY_PLANES; i++) {
@@ -41,6 +45,10 @@ struct vkms_config *vkms_config_alloc_default(bool enable_writeback, bool enable
 			if (!plane)
 				goto err_alloc;
 			plane->type = DRM_PLANE_TYPE_OVERLAY;
+			plane->name = kzalloc(10, GFP_KERNEL);
+			if (!plane->name)
+				goto err_alloc;
+			snprintf(plane->name, 10, "plane-%d", i);
 		}
 	}
 	if (enable_cursor) {
@@ -48,6 +56,10 @@ struct vkms_config *vkms_config_alloc_default(bool enable_writeback, bool enable
 		if (!plane)
 			goto err_alloc;
 		plane->type = DRM_PLANE_TYPE_CURSOR;
+		plane->name = kzalloc(sizeof("cursor"), GFP_KERNEL);
+		if (!plane->name)
+			goto err_alloc;
+		sprintf(plane->name, "cursor");
 	}
 
 	return vkms_config;
@@ -79,6 +91,7 @@ void vkms_config_delete_plane(struct vkms_config_plane *vkms_config_overlay)
 	if (!vkms_config_overlay)
 		return;
 	list_del(&vkms_config_overlay->link);
+	kfree(vkms_config_overlay->name);
 	kfree(vkms_config_overlay);
 }
 
@@ -131,6 +144,7 @@ static int vkms_config_show(struct seq_file *m, void *data)
 	seq_printf(m, "writeback=%d\n", vkmsdev->config->writeback);
 	list_for_each_entry(config_plane, &vkmsdev->config->planes, link) {
 		seq_puts(m, "plane:\n");
+		seq_printf(m, "\tname: %s\n", config_plane->name);
 		seq_printf(m, "\ttype: %d\n", config_plane->type);
 	}
 
diff --git a/drivers/gpu/drm/vkms/vkms_config.h b/drivers/gpu/drm/vkms/vkms_config.h
index 77c1c3934189..792c5e904aa1 100644
--- a/drivers/gpu/drm/vkms/vkms_config.h
+++ b/drivers/gpu/drm/vkms/vkms_config.h
@@ -25,6 +25,7 @@ struct vkms_config {
  * struct vkms_config_plane
  *
  * @link: Link to the others planes
+ * @name: Name of the plane
  * @type: Type of the plane. The creator of configuration needs to ensures that at least one
  *        plane is primary.
  * @plane: Internal usage. This pointer should never be considered as valid. It can be used to
@@ -34,6 +35,7 @@ struct vkms_config {
 struct vkms_config_plane {
 	struct list_head link;
 
+	char *name;
 	enum drm_plane_type type;
 
 	/* Internal usage */
diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
index dc9bccf60071..d2b1b524499f 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -231,7 +231,7 @@ struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
 	plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 0,
 					   &vkms_plane_funcs,
 					   vkms_formats, ARRAY_SIZE(vkms_formats),
-					   NULL, config->type, NULL);
+					   NULL, config->type, config->name);
 	if (IS_ERR(plane))
 		return plane;
 

-- 
2.44.2