drm/ast: Replace driver load/unload functions with device create/destroy

The ast driver's load and unload functions are left-overs from when
struct drm_driver.load/unload was still in use. The PCI probe helper
allocated the DRM device and ran load to initialize it.

This patch replaces this code with device create and destroy. The
main difference is that the device's create function allocates the
DRM device and ast structures in the same place. This will be required
for switching ast to managed allocations.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200730135206.30239-4-tzimmermann@suse.de

1 files changed, 18 insertions, 6 deletions

diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index dd12b55d57a2..8d46166f8462 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -30,6 +30,7 @@
 
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
+#include <drm/drm_drv.h>
 #include <drm/drm_gem.h>
 #include <drm/drm_gem_vram_helper.h>
 
@@ -378,15 +379,25 @@ static int ast_get_dram_info(struct drm_device *dev)
 	return 0;
 }
 
-int ast_driver_load(struct drm_device *dev, unsigned long flags)
+struct ast_private *ast_device_create(struct drm_driver *drv,
+				      struct pci_dev *pdev,
+				      unsigned long flags)
 {
+	struct drm_device *dev;
 	struct ast_private *ast;
 	bool need_post;
 	int ret = 0;
 
+	dev = drm_dev_alloc(drv, &pdev->dev);
+	if (IS_ERR(dev))
+		return ERR_CAST(dev);
+
+	dev->pdev = pdev;
+	pci_set_drvdata(pdev, dev);
+
 	ast = kzalloc(sizeof(struct ast_private), GFP_KERNEL);
 	if (!ast)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	dev->dev_private = ast;
 	ast->dev = dev;
@@ -435,16 +446,17 @@ int ast_driver_load(struct drm_device *dev, unsigned long flags)
 	if (ret)
 		goto out_free;
 
-	return 0;
+	return ast;
+
 out_free:
 	kfree(ast);
 	dev->dev_private = NULL;
-	return ret;
+	return ERR_PTR(ret);
 }
 
-void ast_driver_unload(struct drm_device *dev)
+void ast_device_destroy(struct ast_private *ast)
 {
-	struct ast_private *ast = to_ast_private(dev);
+	struct drm_device *dev = ast->dev;
 
 	/* enable standard VGA decode */
 	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x04);