From: Helge Deller deller@gmx.de
commit cf936af790a3ef5f41ff687ec91bfbffee141278 upstream.
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+ Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/parisc/include/asm/fb.h | 4 ++++ drivers/video/console/sticore.c | 17 +++++++++++++++++ drivers/video/fbdev/stifb.c | 4 ++-- 3 files changed, 23 insertions(+), 2 deletions(-)
--- a/arch/parisc/include/asm/fb.h +++ b/arch/parisc/include/asm/fb.h @@ -12,9 +12,13 @@ static inline void fb_pgprotect(struct f 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_ */ --- 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 *st 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"); --- a/drivers/video/fbdev/stifb.c +++ b/drivers/video/fbdev/stifb.c @@ -1358,11 +1358,11 @@ static int __init stifb_init_fb(struct s 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,