[RFC,v2,01/18] drm/vkms: Extract vkms_config header

Commit Message

Louis Chauvet Nov. 22, 2024, 5:20 p.m. UTC

Creating a new vkms_config structure will be more complex once we
start adding more options.

Extract the vkms_config structure to its own header and source files
and add functions to create and delete a vkms_config and to initialize
debugfs.

Refactor, no functional changes.

Signed-off-by: Louis Chauvet <[e-mail]>
[Changes: Cherry picked and conflict solve]
Signed-off-by: José Expósito <[e-mail]>
---
 drivers/gpu/drm/vkms/Makefile      |  3 ++-
 drivers/gpu/drm/vkms/vkms_config.c | 48 ++++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/vkms/vkms_config.h | 32 +++++++++++++++++++++++++
 drivers/gpu/drm/vkms/vkms_drv.c    | 41 +++++++++-----------------------
 drivers/gpu/drm/vkms/vkms_drv.h    | 15 +-----------
 drivers/gpu/drm/vkms/vkms_output.c |  1 +
 6 files changed, 95 insertions(+), 45 deletions(-)

Patch

diff --git a/drivers/gpu/drm/vkms/Makefile b/drivers/gpu/drm/vkms/Makefile
index 8d3e46dde6350558a0aab4254df0dfe863f9c6ce..2b6db5870b977f6e5013982af89a48aec6c11983 100644
--- a/drivers/gpu/drm/vkms/Makefile
+++ b/drivers/gpu/drm/vkms/Makefile
@@ -6,7 +6,8 @@  vkms-y := \
 	vkms_formats.o \
 	vkms_crtc.o \
 	vkms_composer.o \
-	vkms_writeback.o
+	vkms_writeback.o \
+	vkms_config.o
 
 obj-$(CONFIG_DRM_VKMS) += vkms.o
 obj-$(CONFIG_DRM_VKMS_KUNIT_TESTS) += tests/
diff --git a/drivers/gpu/drm/vkms/vkms_config.c b/drivers/gpu/drm/vkms/vkms_config.c
new file mode 100644
index 0000000000000000000000000000000000000000..76355174a6ca54b880218c2bd458c8339a3dabaa
--- /dev/null
+++ b/drivers/gpu/drm/vkms/vkms_config.c
@@ -0,0 +1,48 @@ 
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <kunit/visibility.h>
+#include <drm/drm_debugfs.h>
+
+#include "vkms_config.h"
+#include "vkms_drv.h"
+
+struct vkms_config *vkms_config_create(void)
+{
+	struct vkms_config *config;
+
+	config = kzalloc(sizeof(*config), GFP_KERNEL);
+	if (!config)
+		return ERR_PTR(-ENOMEM);
+
+	return config;
+}
+EXPORT_SYMBOL_IF_KUNIT(vkms_config_create);
+
+void vkms_config_destroy(struct vkms_config *config)
+{
+	kfree(config);
+}
+EXPORT_SYMBOL_IF_KUNIT(vkms_config_destroy);
+
+static int vkms_config_show(struct seq_file *m, void *data)
+{
+	struct drm_debugfs_entry *entry = m->private;
+	struct drm_device *dev = entry->dev;
+	struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev);
+
+	seq_printf(m, "writeback=%d\n", vkmsdev->config->writeback);
+	seq_printf(m, "cursor=%d\n", vkmsdev->config->cursor);
+	seq_printf(m, "overlay=%d\n", vkmsdev->config->overlay);
+
+	return 0;
+}
+
+static const struct drm_debugfs_info vkms_config_debugfs_list[] = {
+	{ "vkms_config", vkms_config_show, 0 },
+};
+
+void vkms_config_register_debugfs(struct vkms_device *vkms_device)
+{
+	drm_debugfs_add_files(&vkms_device->drm, vkms_config_debugfs_list,
+			      ARRAY_SIZE(vkms_config_debugfs_list));
+}
diff --git a/drivers/gpu/drm/vkms/vkms_config.h b/drivers/gpu/drm/vkms/vkms_config.h
new file mode 100644
index 0000000000000000000000000000000000000000..b284831738743f6d7c452be03f917a7d3975d173
--- /dev/null
+++ b/drivers/gpu/drm/vkms/vkms_config.h
@@ -0,0 +1,32 @@ 
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef _VKMS_CONFIG_H
+#define _VKMS_CONFIG_H
+
+#include <linux/types.h>
+#include "vkms_drv.h"
+
+/**
+ * struct vkms_config - General configuration for VKMS driver
+ *
+ * @writeback: If true, a writeback buffer can be attached to the CRTC
+ * @cursor: If true, a cursor plane is created in the VKMS device
+ * @overlay: If true, NUM_OVERLAY_PLANES will be created for the VKMS device
+ * @dev: Used to store the current vkms device. Only set when the device is instancied.
+ */
+struct vkms_config {
+	bool writeback;
+	bool cursor;
+	bool overlay;
+	struct vkms_device *dev;
+};
+
+/**
+ * vkms_config_register_debugfs() - Register the debugfs file to display current configuration
+ */
+void vkms_config_register_debugfs(struct vkms_device *vkms_device);
+
+struct vkms_config *vkms_config_create(void);
+void vkms_config_destroy(struct vkms_config *config);
+
+#endif //_VKMS_CONFIG_H
diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index c54504e590a18ae8af07cc1cc48179c38c4e6c0f..e399566a5b5d6a6cf92a41c72910e857fc4e743f 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -28,6 +28,7 @@ 
 #include <drm/drm_vblank.h>
 
 #include "vkms_drv.h"
+#include "vkms_config.h"
 
 #include <drm/drm_print.h>
 #include <drm/drm_debugfs.h>
@@ -82,22 +83,6 @@  static void vkms_atomic_commit_tail(struct drm_atomic_state *old_state)
 	drm_atomic_helper_cleanup_planes(dev, old_state);
 }
 
-static int vkms_config_show(struct seq_file *m, void *data)
-{
-	struct drm_debugfs_entry *entry = m->private;
-	struct drm_device *dev = entry->dev;
-	struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev);
-
-	seq_printf(m, "writeback=%d\n", vkmsdev->config->writeback);
-	seq_printf(m, "cursor=%d\n", vkmsdev->config->cursor);
-	seq_printf(m, "overlay=%d\n", vkmsdev->config->overlay);
-
-	return 0;
-}
-
-static const struct drm_debugfs_info vkms_config_debugfs_list[] = {
-	{ "vkms_config", vkms_config_show, 0 },
-};
 
 static const struct drm_driver vkms_driver = {
 	.driver_features	= DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_GEM,
@@ -210,8 +195,7 @@  static int vkms_create(struct vkms_config *config)
 	if (ret)
 		goto out_devres;
 
-	drm_debugfs_add_files(&vkms_device->drm, vkms_config_debugfs_list,
-			      ARRAY_SIZE(vkms_config_debugfs_list));
+	vkms_config_register_debugfs(vkms_device);
 
 	ret = drm_dev_register(&vkms_device->drm, 0);
 	if (ret)
@@ -231,21 +215,18 @@  static int vkms_create(struct vkms_config *config)
 static int __init vkms_init(void)
 {
 	int ret;
-	struct vkms_config *config;
-
-	config = kmalloc(sizeof(*config), GFP_KERNEL);
-	if (!config)
-		return -ENOMEM;
 
-	default_config = config;
+	default_config = vkms_config_create();
+	if (IS_ERR(default_config))
+		return PTR_ERR(default_config);
 
-	config->cursor = enable_cursor;
-	config->writeback = enable_writeback;
-	config->overlay = enable_overlay;
+	default_config->cursor = enable_cursor;
+	default_config->writeback = enable_writeback;
+	default_config->overlay = enable_overlay;
 
-	ret = vkms_create(config);
+	ret = vkms_create(default_config);
 	if (ret)
-		kfree(config);
+		vkms_config_destroy(default_config);
 
 	return ret;
 }
@@ -274,7 +255,7 @@  static void __exit vkms_exit(void)
 	if (default_config->dev)
 		vkms_destroy(default_config);
 
-	kfree(default_config);
+	vkms_config_destroy(default_config);
 }
 
 module_init(vkms_init);
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index ddb6bf94514d9364521ff7c38a04d9aa69fc09dc..6dde780d0515394faf2a4763f9bb7447a28d1472 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -212,20 +212,7 @@  struct vkms_crtc {
 	spinlock_t composer_lock;
 };
 
-/**
- * struct vkms_config - General configuration for VKMS driver
- *
- * @writeback: If true, a writeback buffer can be attached to the CRTC
- * @cursor: If true, a cursor plane is created in the VKMS device
- * @overlay: If true, NUM_OVERLAY_PLANES will be created for the VKMS device
- * @dev: Used to store the current VKMS device. Only set when the device is instantiated.
- */
-struct vkms_config {
-	bool writeback;
-	bool cursor;
-	bool overlay;
-	struct vkms_device *dev;
-};
+struct vkms_config;
 
 /**
  * struct vkms_device - Description of a VKMS device
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
index 1c6d41856e317eb7b9b79f56fdf7473d0a339250..34b6e761bce8a1f2153e1e47c795bad1a52a3454 100644
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ b/drivers/gpu/drm/vkms/vkms_output.c
@@ -1,6 +1,7 @@ 
 // SPDX-License-Identifier: GPL-2.0+
 
 #include "vkms_drv.h"
+#include "vkms_config.h"
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_managed.h>