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drm/ast: Managed device release 

This turns the ast's device cleanup code into a managed release helper
function. Note that the code uses devres helpers. The release function
switches the device back to VGA mode and therefore runs during HW device
cleanup; not at DRM device cleanup.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200730135206.30239-10-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2020-07-30 15:52:06 +02:00
parent 4bc85b82c8
commit cff0adca1e
3 changed files with 19 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/gpu/drm/ast/ast_drv.c
View File

@ -120,35 +120,24 @@ static int ast_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
return ret;
ast = ast_device_create(&ast_driver, pdev, ent->driver_data);
if (IS_ERR(ast)) {
ret = PTR_ERR(ast);
goto err_drm_dev_put;
}
if (IS_ERR(ast))
return PTR_ERR(ast);
dev = &ast->base;
ret = drm_dev_register(dev, ent->driver_data);
if (ret)
goto err_ast_device_destroy;
return ret;
drm_fbdev_generic_setup(dev, 32);
return 0;
err_ast_device_destroy:
ast_device_destroy(ast);
err_drm_dev_put:
drm_dev_put(dev);
return ret;
}
static void ast_pci_remove(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
struct ast_private *ast = to_ast_private(dev);
drm_dev_unregister(dev);
ast_device_destroy(ast);
drm_dev_put(dev);
}
static int ast_drm_freeze(struct drm_device *dev)

1
drivers/gpu/drm/ast/ast_drv.h
View File

@ -162,7 +162,6 @@ static inline struct ast_private *to_ast_private(struct drm_device *dev)
struct ast_private *ast_device_create(struct drm_driver *drv,
struct pci_dev *pdev,
unsigned long flags);
void ast_device_destroy(struct ast_private *ast);
#define AST_IO_AR_PORT_WRITE (0x40)
#define AST_IO_MISC_PORT_WRITE (0x42)

22
drivers/gpu/drm/ast/ast_main.c
View File

@ -380,6 +380,18 @@ static int ast_get_dram_info(struct drm_device *dev)
return 0;
}
/*
* Run this function as part of the HW device cleanup; not
* when the DRM device gets released.
*/
static void ast_device_release(void *data)
{
struct ast_private *ast = data;
/* enable standard VGA decode */
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x04);
}
struct ast_private *ast_device_create(struct drm_driver *drv,
struct pci_dev *pdev,
unsigned long flags)
@ -438,11 +450,9 @@ struct ast_private *ast_device_create(struct drm_driver *drv,
if (ret)
return ERR_PTR(ret);
ret = devm_add_action_or_reset(dev->dev, ast_device_release, ast);
if (ret)
return ERR_PTR(ret);
return ast;
}
void ast_device_destroy(struct ast_private *ast)
{
/* enable standard VGA decode */
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x04);
}