Commit 968ee436 authored by Jiakun Shuai's avatar Jiakun Shuai
Browse files

drm/ast: Fixed display error for ps23xx when using ast bmc card 

phytium inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I9NGXP


CVE: NA

-----------------------------------------------------------------

When the ast bmc card is detected on ps23xx SoCs, change the card's
vram to uncache mode to avoid unnecessary trouble.

Signed-off-by: default avatarWangHao <wanghao1851@phytium.com.cn>
Signed-off-by: default avatarJiakun Shuai <shuaijiakun1288@phytium.com.cn>
parent b5620901

drivers/gpu/drm/ast/ast_drv.c

+20 −0
Original line number Diff line number Diff line
@@ -50,11 +50,31 @@ module_param_named(modeset, ast_modeset, int, 0400); 


DEFINE_DRM_GEM_FOPS(ast_fops);



#define DRM_AST_VRAM_TYPE_DEVICE 0x0

#define DRM_IOCTL_AST_VRAM_TYPE_DEVICE	DRM_IO(DRM_COMMAND_BASE\

	+ DRM_AST_VRAM_TYPE_DEVICE)



static int ast_ioctl_check_5c01_device(struct drm_device *dev, void *data,

				struct drm_file *file_priv)

{

	struct ast_private *priv = to_ast_private(dev);



	return priv->is_5c01_device ? 1 : 0;

}



static const struct drm_ioctl_desc ast_ioctls[] = {

	/* for test, none so far */

	DRM_IOCTL_DEF_DRV(AST_VRAM_TYPE_DEVICE, ast_ioctl_check_5c01_device,

						DRM_AUTH|DRM_UNLOCKED),

};



static struct drm_driver ast_driver = {

	.driver_features = DRIVER_ATOMIC |

			   DRIVER_GEM |

			   DRIVER_MODESET,



	.ioctls = ast_ioctls,

	.num_ioctls = ARRAY_SIZE(ast_ioctls),

	.fops = &ast_fops,

	.name = DRIVER_NAME,

	.desc = DRIVER_DESC,

drivers/gpu/drm/ast/ast_drv.h

+1 −0
Original line number Diff line number Diff line
@@ -142,6 +142,7 @@ struct ast_private { 
	struct drm_encoder encoder;

	struct ast_connector connector;



	bool is_5c01_device;

	bool support_wide_screen;

	enum {

		ast_use_p2a,

drivers/gpu/drm/ast/ast_mm.c

+54 −0
Original line number Diff line number Diff line
@@ -74,6 +74,52 @@ static u32 ast_get_vram_size(struct ast_private *ast) 
	return vram_size;

}



static int ast_driver_io_mem_reserve(struct ttm_bo_device *bdev,

									struct ttm_resource *mem)

{

	struct drm_vram_mm *vmm = drm_vram_mm_of_bdev(bdev);

	size_t bus_size = (size_t)mem->num_pages << PAGE_SHIFT;



	switch (mem->mem_type) {

	case TTM_PL_SYSTEM:     /* nothing to do */

			break;

	case TTM_PL_VRAM:

			mem->bus.offset = (mem->start << PAGE_SHIFT) + vmm->vram_base;

			mem->bus.is_iomem = true;



			mem->placement = TTM_PL_FLAG_UNCACHED;

			mem->bus.addr = ioremap(mem->bus.offset, bus_size);



			if (!mem->bus.addr)

				return -ENOMEM;



			break;

	default:

			return -EINVAL;

	}



	return 0;

}



static bool ast_pci_host_is_5c01(struct pci_bus *bus)

{

	struct pci_bus *child = bus;

	struct pci_dev *root = NULL;



	while (child) {

		if (child->parent->parent)

			child = child->parent;

		else

			break;

	}



	root = child->self;



	if ((root->vendor == 0x1db7) && (root->device == 0x5c01))

		return true;

	return false;

}



static void ast_mm_release(struct drm_device *dev, void *ptr)

{

	struct ast_private *ast = to_ast_private(dev);
@@ -86,6 +132,7 @@ static void ast_mm_release(struct drm_device *dev, void *ptr) 
int ast_mm_init(struct ast_private *ast)

{

	struct drm_device *dev = &ast->base;

	struct pci_dev *pdev = to_pci_dev(dev->dev);

	u32 vram_size;

	int ret;
@@ -98,6 +145,13 @@ int ast_mm_init(struct ast_private *ast) 
		return ret;

	}



	if (ast_pci_host_is_5c01(pdev->bus) && dev->vram_mm->bdev.driver) {

		ast->is_5c01_device = true;

		dev->vram_mm->bdev.driver->io_mem_reserve = ast_driver_io_mem_reserve;

	} else {

		ast->is_5c01_device = false;

	}



	arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),

				   pci_resource_len(dev->pdev, 0));

	ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),