Hi
Am 04.10.24 um 17:24 schrieb Gonzalo Silvalde Blanco:
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.)
Tested by building with and without CONFIG_FB_DEVICE, both of which
compiled without issues.
Signed-off-by: Gonzalo Silvalde Blanco <gonzalo.silvalde@xxxxxxxxx>
Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
One thing I forgot, is that you also have to remove the dependency from
the Kconfig option. [1] Otherwise, it won't be possible to select the
driver.
Best regards
Thomas
[1]
https://elixir.bootlin.com/linux/v6.11.2/source/drivers/video/fbdev/Kconfig#L1239
---
drivers/video/fbdev/sstfb.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/video/fbdev/sstfb.c b/drivers/video/fbdev/sstfb.c
index f8ae54ca0cc3..8d2e9d1f8d80 100644
--- a/drivers/video/fbdev/sstfb.c
+++ b/drivers/video/fbdev/sstfb.c
@@ -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)
{
@@ -736,10 +737,10 @@ static ssize_t show_vgapass(struct device *device, struct device_attribute *attr
struct sstfb_par *par = info->par;
return sprintf(buf, "%d\n", par->vgapass);
}
-
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)
@@ -1435,10 +1436,10 @@ static int sstfb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
}
sstfb_clear_screen(info);
-
+#fdef 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);
@@ -1467,8 +1468,9 @@ 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);
--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)
