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authorHelge Deller <deller@gmx.de>2022-06-02 13:50:44 +0200
committerHelge Deller <deller@gmx.de>2022-06-04 15:47:03 +0200
commitcf936af790a3ef5f41ff687ec91bfbffee141278 (patch)
tree68e2577f3687ecdaf51f39b79f4405e4cd4cfb4c
parent6ba688364856ad083be537f08e86ba97f433d405 (diff)
parisc/stifb: Implement fb_is_primary_device()
Implement fb_is_primary_device() function, so that fbcon detects if this framebuffer belongs to the default graphics card which was used to start the system. Signed-off-by: Helge Deller <deller@gmx.de> Cc: stable@vger.kernel.org # v5.10+
-rw-r--r--arch/parisc/include/asm/fb.h4
-rw-r--r--drivers/video/console/sticore.c17
-rw-r--r--drivers/video/fbdev/stifb.c4
3 files changed, 23 insertions, 2 deletions
diff --git a/arch/parisc/include/asm/fb.h b/arch/parisc/include/asm/fb.h
index c4cd6360f996..d63a2acb91f2 100644
--- a/arch/parisc/include/asm/fb.h
+++ b/arch/parisc/include/asm/fb.h
@@ -12,9 +12,13 @@ static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
}
+#if defined(CONFIG_STI_CONSOLE) || defined(CONFIG_FB_STI)
+int fb_is_primary_device(struct fb_info *info);
+#else
static inline int fb_is_primary_device(struct fb_info *info)
{
return 0;
}
+#endif
#endif /* _ASM_FB_H_ */
diff --git a/drivers/video/console/sticore.c b/drivers/video/console/sticore.c
index f869b723494f..62005064911b 100644
--- a/drivers/video/console/sticore.c
+++ b/drivers/video/console/sticore.c
@@ -30,6 +30,7 @@
#include <asm/pdc.h>
#include <asm/cacheflush.h>
#include <asm/grfioctl.h>
+#include <asm/fb.h>
#include "../fbdev/sticore.h"
@@ -1127,6 +1128,22 @@ int sti_call(const struct sti_struct *sti, unsigned long func,
return ret;
}
+/* check if given fb_info is the primary device */
+int fb_is_primary_device(struct fb_info *info)
+{
+ struct sti_struct *sti;
+
+ sti = sti_get_rom(0);
+
+ /* if no built-in graphics card found, allow any fb driver as default */
+ if (!sti)
+ return true;
+
+ /* return true if it's the default built-in framebuffer driver */
+ return (sti->info == info);
+}
+EXPORT_SYMBOL(fb_is_primary_device);
+
MODULE_AUTHOR("Philipp Rumpf, Helge Deller, Thomas Bogendoerfer");
MODULE_DESCRIPTION("Core STI driver for HP's NGLE series graphics cards in HP PARISC machines");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/video/fbdev/stifb.c b/drivers/video/fbdev/stifb.c
index bebb2eea6448..38a861e22c33 100644
--- a/drivers/video/fbdev/stifb.c
+++ b/drivers/video/fbdev/stifb.c
@@ -1358,11 +1358,11 @@ static int __init stifb_init_fb(struct sti_struct *sti, int bpp_pref)
goto out_err3;
}
+ /* save for primary gfx device detection & unregister_framebuffer() */
+ sti->info = info;
if (register_framebuffer(&fb->info) < 0)
goto out_err4;
- sti->info = info; /* save for unregister_framebuffer() */
-
fb_info(&fb->info, "%s %dx%d-%d frame buffer device, %s, id: %04x, mmio: 0x%04lx\n",
fix->id,
var->xres,