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Subject[PATCH V4 1/3] drm/vkms: Add vkms_config type
Currently, data for the device instance is held by vkms_device.
Add a separate type, vkms_config to contain configuration details
for the device and various modes to be later used by configfs.
This config data stays constant once the device is created.

Accordingly, add vkms_create and vkms_destroy to initialize/destroy
device through configfs. Currently, they are being called from vkms_init
and vkms_exit, but will be evoked from configfs later on. When configfs
is added, device configuration will be tracked by configfs and only vkms
device lifetime will be handled by vkms_init and vkms_exit functions.

Modify usage of enable_cursor feature to reflect the changes in
relevant files.

Co-developed-by: Daniel Vetter <danvet.vetter@ffwl.ch>
Signed-off-by: Daniel Vetter <danvet.vetter@ffwl.ch>
Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
---
drivers/gpu/drm/vkms/vkms_drv.c | 40 ++++++++++++++++++++++++------
drivers/gpu/drm/vkms/vkms_drv.h | 12 +++++++--
drivers/gpu/drm/vkms/vkms_output.c | 4 +--
3 files changed, 44 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index aef29393b811..6b33975a5cb2 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -34,9 +34,9 @@
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0

-static struct vkms_device *vkms_device;
+static struct vkms_config *default_config;

-bool enable_cursor = true;
+static bool enable_cursor = true;
module_param_named(enable_cursor, enable_cursor, bool, 0444);
MODULE_PARM_DESC(enable_cursor, "Enable/Disable cursor support");

@@ -122,10 +122,11 @@ static int vkms_modeset_init(struct vkms_device *vkmsdev)
return vkms_output_init(vkmsdev, 0);
}

-static int __init vkms_init(void)
+static int vkms_create(struct vkms_config *config)
{
int ret;
struct platform_device *pdev;
+ struct vkms_device *vkms_device;

pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
if (IS_ERR(pdev))
@@ -143,6 +144,8 @@ static int __init vkms_init(void)
goto out_devres;
}
vkms_device->platform = pdev;
+ vkms_device->config = config;
+ config->dev = vkms_device;

ret = dma_coerce_mask_and_coherent(vkms_device->drm.dev,
DMA_BIT_MASK(64));
@@ -179,21 +182,42 @@ static int __init vkms_init(void)
return ret;
}

-static void __exit vkms_exit(void)
+static int __init vkms_init(void)
+{
+ struct vkms_config *config = kmalloc(sizeof(*config), GFP_KERNEL);
+
+ default_config = config;
+
+ config->cursor = enable_cursor;
+
+ return vkms_create(config);
+}
+
+static void vkms_destroy(struct vkms_config *config)
{
struct platform_device *pdev;

- if (!vkms_device) {
+ if (!config->dev) {
DRM_INFO("vkms_device is NULL.\n");
return;
}

- pdev = vkms_device->platform;
+ pdev = config->dev->platform;

- drm_dev_unregister(&vkms_device->drm);
- drm_atomic_helper_shutdown(&vkms_device->drm);
+ drm_dev_unregister(&config->dev->drm);
+ drm_atomic_helper_shutdown(&config->dev->drm);
devres_release_group(&pdev->dev, NULL);
platform_device_unregister(pdev);
+
+ config->dev = NULL;
+}
+
+static void __exit vkms_exit(void)
+{
+ if (default_config->dev)
+ vkms_destroy(default_config);
+
+ kfree(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 5ed91ff08cb3..6a27bd8875f2 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -19,8 +19,6 @@
#define XRES_MAX 8192
#define YRES_MAX 8192

-extern bool enable_cursor;
-
struct vkms_composer {
struct drm_framebuffer fb;
struct drm_rect src, dst;
@@ -82,10 +80,19 @@ struct vkms_output {
spinlock_t composer_lock;
};

+struct vkms_device;
+
+struct vkms_config {
+ bool cursor;
+ /* only set when instantiated */
+ struct vkms_device *dev;
+};
+
struct vkms_device {
struct drm_device drm;
struct platform_device *platform;
struct vkms_output output;
+ const struct vkms_config *config;
};

#define drm_crtc_to_vkms_output(target) \
@@ -124,3 +131,4 @@ void vkms_set_composer(struct vkms_output *out, bool enabled);
int vkms_enable_writeback_connector(struct vkms_device *vkmsdev);

#endif /* _VKMS_DRV_H_ */
+
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
index 4a1848b0318f..8f3ffb28b9d1 100644
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ b/drivers/gpu/drm/vkms/vkms_output.c
@@ -46,7 +46,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
if (IS_ERR(primary))
return PTR_ERR(primary);

- if (enable_cursor) {
+ if (vkmsdev->config->cursor) {
cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
if (IS_ERR(cursor)) {
ret = PTR_ERR(cursor);
@@ -98,7 +98,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
drm_crtc_cleanup(crtc);

err_crtc:
- if (enable_cursor)
+ if (vkmsdev->config->cursor)
drm_plane_cleanup(cursor);

err_cursor:
--
2.25.1
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