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drm/mgag200: Lookup VRAM PCI BAR start and length only once

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The MM setup code on mgag200 reads PCI BAR 0's start and length
several times. Reusing these values makes the code more readable.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200605135803.19811-6-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2020-06-05 15:57:54 +02:00
parent e7b9db6a14
commit 0956c329a4
1 changed files with 9 additions and 8 deletions
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17
drivers/gpu/drm/mgag200/mgag200_mm.c
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@ -33,16 +33,18 @@
int mgag200_mm_init(struct mga_device *mdev)
{
struct drm_device *dev = mdev->dev;
resource_size_t start, len;
int ret;
arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
pci_resource_len(dev->pdev, 0));
/* BAR 0 is VRAM */
start = pci_resource_start(dev->pdev, 0);
len = pci_resource_len(dev->pdev, 0);
mdev->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
pci_resource_len(dev->pdev, 0));
arch_io_reserve_memtype_wc(start, len);
mdev->vram = ioremap(pci_resource_start(dev->pdev, 0),
pci_resource_len(dev->pdev, 0));
mdev->fb_mtrr = arch_phys_wc_add(start, len);
mdev->vram = ioremap(start, len);
if (!mdev->vram) {
ret = -ENOMEM;
goto err_arch_phys_wc_del;
@ -54,8 +56,7 @@ int mgag200_mm_init(struct mga_device *mdev)
err_arch_phys_wc_del:
arch_phys_wc_del(mdev->fb_mtrr);
arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
pci_resource_len(dev->pdev, 0));
arch_io_free_memtype_wc(start, len);
return ret;
}