diff options
| author | Helge Deller <deller@gmx.de> | 2022-06-02 13:50:44 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2022-06-04 15:47:03 +0200 |
| commit | cf936af790a3ef5f41ff687ec91bfbffee141278 (patch) | |
| tree | 68e2577f3687ecdaf51f39b79f4405e4cd4cfb4c | |
| parent | 6ba688364856ad083be537f08e86ba97f433d405 (diff) | |
| download | lwn-cf936af790a3ef5f41ff687ec91bfbffee141278.tar.gz lwn-cf936af790a3ef5f41ff687ec91bfbffee141278.zip | |
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.h | 4 | ||||
| -rw-r--r-- | drivers/video/console/sticore.c | 17 | ||||
| -rw-r--r-- | drivers/video/fbdev/stifb.c | 4 |
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, |