linux-kernel - [PATCH RESEND v2 01/32] drm/drm_mode_config: Add helper to get plane type name

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Message-Id: <20251029-vkms-all-config-v2-1-a49a2d4cba26@bootlin.com>
Date: Wed, 29 Oct 2025 15:36:38 +0100
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Haneen Mohammed <hamohammed.sa@...il.com>, 
 Simona Vetter <simona@...ll.ch>, Melissa Wen <melissa.srw@...il.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, jose.exposito89@...il.com, 
 Jonathan Corbet <corbet@....net>
Cc: victoria@...tem76.com, sebastian.wick@...hat.com, victoria@...tem76.com, 
 airlied@...il.com, thomas.petazzoni@...tlin.com, 
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-doc@...r.kernel.org, Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH RESEND v2 01/32] drm/drm_mode_config: Add helper to get
 plane type name

Create and export an helper to display plane type using the
property string. This could be used to display debug
information in VKMS.

Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
 drivers/gpu/drm/drm_mode_config.c | 13 +++++++++++++
 include/drm/drm_mode_config.h     |  3 +++
 2 files changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c
index 25f376869b3a..1a1a3f43db4d 100644
--- a/drivers/gpu/drm/drm_mode_config.c
+++ b/drivers/gpu/drm/drm_mode_config.c
@@ -226,6 +226,19 @@ static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
 	{ DRM_PLANE_TYPE_CURSOR, "Cursor" },
 };
 
+/**
+ * drm_get_plane_type_name - return a string for plane name
+ * @type: plane type to compute name of
+ */
+const char *drm_get_plane_type_name(enum drm_plane_type type)
+{
+	if (type < ARRAY_SIZE(drm_plane_type_enum_list))
+		return drm_plane_type_enum_list[type].name;
+	else
+		return "(unknown)";
+}
+EXPORT_SYMBOL(drm_get_plane_type_name);
+
 static int drm_mode_create_standard_properties(struct drm_device *dev)
 {
 	struct drm_property *prop;
diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index 2e848b816218..89f3dd46178d 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -30,6 +30,7 @@
 #include <linux/llist.h>
 
 #include <drm/drm_modeset_lock.h>
+#include <drm/drm_plane.h>
 
 struct drm_file;
 struct drm_device;
@@ -983,4 +984,6 @@ static inline int drm_mode_config_init(struct drm_device *dev)
 void drm_mode_config_reset(struct drm_device *dev);
 void drm_mode_config_cleanup(struct drm_device *dev);
 
+const char *drm_get_plane_type_name(enum drm_plane_type type);
+
 #endif

-- 
2.51.0