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fbdev: sstfb: Make CONFIG_FB_DEVICE optional

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The sstfb driver currently depends on CONFIG_FB_DEVICE to create sysfs
entries and access info->dev. This patch wraps the relevant code blocks
with #ifdef CONFIG_FB_DEVICE, allowing the driver to be built and used
even if CONFIG_FB_DEVICE is not selected.

The sysfs setting only controls the VGA pass-through state and is not
required for the display to work correctly.
(See: http://vogonswiki.com/index.php/VGA_passthrough_cable
for more information.)

Added some fixes from Thomas Zimmermann.

Signed-off-by: Gonzalo Silvalde Blanco <gonzalo.silvalde@gmail.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Gonzalo Silvalde Blanco 2024-10-04 17:24:29 +02:00 committed by Helge Deller
parent 8e929cb546
commit 447794e447
2 changed files with 7 additions and 3 deletions
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1
drivers/video/fbdev/Kconfig
View File

@ -1236,7 +1236,6 @@ config FB_3DFX_I2C
config FB_VOODOO1
tristate "3Dfx Voodoo Graphics (sst1) support"
depends on FB && PCI
depends on FB_DEVICE
select FB_IOMEM_HELPERS
help
Say Y here if you have a 3Dfx Voodoo Graphics (Voodoo1/sst1) or

9
drivers/video/fbdev/sstfb.c
View File

@ -716,6 +716,7 @@ static void sstfb_setvgapass( struct fb_info *info, int enable )
pci_write_config_dword(sst_dev, PCI_INIT_ENABLE, tmp);
}
#ifdef CONFIG_FB_DEVICE
static ssize_t store_vgapass(struct device *device, struct device_attribute *attr,
const char *buf, size_t count)
{
@ -739,7 +740,8 @@ static ssize_t show_vgapass(struct device *device, struct device_attribute *attr
static struct device_attribute device_attrs[] = {
__ATTR(vgapass, S_IRUGO|S_IWUSR, show_vgapass, store_vgapass)
};
};
#endif
static int sstfb_ioctl(struct fb_info *info, unsigned int cmd,
unsigned long arg)
@ -1436,9 +1438,10 @@ static int sstfb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
sstfb_clear_screen(info);
#ifdef CONFIG_FB_DEVICE
if (device_create_file(info->dev, &device_attrs[0]))
printk(KERN_WARNING "sstfb: can't create sysfs entry.\n");
#endif
fb_info(info, "%s frame buffer device at 0x%p\n",
fix->id, info->screen_base);
@ -1468,7 +1471,9 @@ static void sstfb_remove(struct pci_dev *pdev)
info = pci_get_drvdata(pdev);
par = info->par;
#ifdef CONFIG_FB_DEVICE
device_remove_file(info->dev, &device_attrs[0]);
#endif
sst_shutdown(info);
iounmap(info->screen_base);
iounmap(par->mmio_vbase);