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author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-16 06:52:38 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-16 06:52:38 +0200 |
commit | 59d41458f143b7a20997b1e78b5c15d9d3e998c3 (patch) | |
tree | ef0410479736c4cb4f3f7f9bfd0db2e3f31719b4 /drivers/video | |
parent | 2aab34f873cc611cf195231c3738080c8dbda7f3 (diff) | |
parent | 4efdddbce7c1329f00c458e85dcaf105aebdc0ed (diff) | |
download | linux-59d41458f143b7a20997b1e78b5c15d9d3e998c3.tar.gz |
Merge tag 'drm-next-2022-01-14' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Daniel Vetter: "drivers fixes: - i915 fixes for ttm backend + one pm wakelock fix - amdgpu fixes, fairly big pile of small things all over. Note this doesn't yet containe the fixed version of the otg sync patch that blew up - small driver fixes: meson, sun4i, vga16fb probe fix drm core fixes: - cma-buf heap locking - ttm compilation - self refresh helper state check - wrong error message in atomic helpers - mipi-dbi buffer mapping" * tag 'drm-next-2022-01-14' of git://anongit.freedesktop.org/drm/drm: (49 commits) drm/mipi-dbi: Fix source-buffer address in mipi_dbi_buf_copy drm: fix error found in some cases after the patch d1af5cd86997 drm/ttm: fix compilation on ARCH=um dma-buf: cma_heap: Fix mutex locking section video: vga16fb: Only probe for EGA and VGA 16 color graphic cards drm/amdkfd: Fix ASIC name typos drm/amdkfd: Fix DQM asserts on Hawaii drm/amdgpu: Use correct VIEWPORT_DIMENSION for DCN2 drm/amd/pm: only send GmiPwrDnControl msg on master die (v3) drm/amdgpu: use spin_lock_irqsave to avoid deadlock by local interrupt drm/amdgpu: not return error on the init_apu_flags drm/amdkfd: Use prange->update_list head for remove_list drm/amdkfd: Use prange->list head for insert_list drm/amdkfd: make SPDX License expression more sound drm/amdkfd: Check for null pointer after calling kmemdup drm/amd/display: invalid parameter check in dmub_hpd_callback Revert "drm/amdgpu: Don't inherit GEM object VMAs in child process" drm/amd/display: reset dcn31 SMU mailbox on failures drm/amdkfd: use default_groups in kobj_type drm/amdgpu: use default_groups in kobj_type ...
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) { |