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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2022-01-14 15:15:56 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2022-01-14 15:17:17 +0100 |
| commit | 71e4a7029045e3904e0e9242b4a7cd84d47b8fe5 (patch) | |
| tree | 2124889dfe07930943df0e156087566dd85a15e9 /drivers/video | |
| parent | ad783ff5a20f851c6d9bca03d12d44f98f494af7 (diff) | |
| parent | 016017a195b86d9761e91cb052438bf71207a12f (diff) | |
| download | linux-71e4a7029045e3904e0e9242b4a7cd84d47b8fe5.tar.gz linux-71e4a7029045e3904e0e9242b4a7cd84d47b8fe5.tar.bz2 linux-71e4a7029045e3904e0e9242b4a7cd84d47b8fe5.zip | |
Merge tag 'drm-misc-fixes-2022-01-14' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
Two DT bindings fixes for meson, a device refcounting fix for sun4i, a
probe fix for vga16fb, a locking fix for the CMA dma-buf heap and a
compilation fix for ttm.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[danvet: I made sure I have exactly the same conflict resolution as
Linus in 8d0749b4f83b ("Merge tag 'drm-next-2022-01-07' of
git://anongit.freedesktop.org/drm/drm") to avoid further conflict fun.
From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220114125454.zs46ny52lrxk3ljz@houat
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/fbdev/vga16fb.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/video/fbdev/vga16fb.c b/drivers/video/fbdev/vga16fb.c index e2757ff1c23d..96e312a3eac7 100644 --- a/drivers/video/fbdev/vga16fb.c +++ b/drivers/video/fbdev/vga16fb.c @@ -184,6 +184,25 @@ static inline void setindex(int index) vga_io_w(VGA_GFX_I, index); } +/* Check if the video mode is supported by the driver */ +static inline int check_mode_supported(void) +{ + /* non-x86 architectures treat orig_video_isVGA as a boolean flag */ +#if defined(CONFIG_X86) + /* only EGA and VGA in 16 color graphic mode are supported */ + if (screen_info.orig_video_isVGA != VIDEO_TYPE_EGAC && + screen_info.orig_video_isVGA != VIDEO_TYPE_VGAC) + return -ENODEV; + + if (screen_info.orig_video_mode != 0x0D && /* 320x200/4 (EGA) */ + screen_info.orig_video_mode != 0x0E && /* 640x200/4 (EGA) */ + screen_info.orig_video_mode != 0x10 && /* 640x350/4 (EGA) */ + screen_info.orig_video_mode != 0x12) /* 640x480/4 (VGA) */ + return -ENODEV; +#endif + return 0; +} + static void vga16fb_pan_var(struct fb_info *info, struct fb_var_screeninfo *var) { @@ -1422,6 +1441,11 @@ static int __init vga16fb_init(void) vga16fb_setup(option); #endif + + ret = check_mode_supported(); + if (ret) + return ret; + ret = platform_driver_register(&vga16fb_driver); if (!ret) { |