diff options
author | Dave Airlie <airlied@redhat.com> | 2022-07-13 10:54:56 +1000 |
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committer | Dave Airlie <airlied@redhat.com> | 2022-07-13 10:54:56 +1000 |
commit | e23a5e14aa278858c2e3d81ec34e83aa9a4177c5 (patch) | |
tree | 8b662fca8f0643d2b7ef0836da91835408075208 /drivers/video/fbdev/core/fbcon.c | |
parent | Merge tag 'mediatek-drm-next-5.20' of https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux into drm-next (diff) | |
parent | Linux 5.19-rc6 (diff) | |
download | linux-dev-e23a5e14aa278858c2e3d81ec34e83aa9a4177c5.tar.xz linux-dev-e23a5e14aa278858c2e3d81ec34e83aa9a4177c5.zip |
Backmerge tag 'v5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into drm-next
Backmerge in rc6 so I can merge msm next easier.
Linux 5.19-rc6
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/video/fbdev/core/fbcon.c')
-rw-r--r-- | drivers/video/fbdev/core/fbcon.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index 1be8aa9f8074..f114242b5a70 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -2466,6 +2466,11 @@ static int fbcon_set_font(struct vc_data *vc, struct console_font *font, if (charcount != 256 && charcount != 512) return -EINVAL; + /* font bigger than screen resolution ? */ + if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) || + h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) + return -EINVAL; + /* Make sure drawing engine can handle the font */ if (!(info->pixmap.blit_x & (1 << (font->width - 1))) || !(info->pixmap.blit_y & (1 << (font->height - 1)))) @@ -2728,6 +2733,34 @@ void fbcon_update_vcs(struct fb_info *info, bool all) } EXPORT_SYMBOL(fbcon_update_vcs); +/* let fbcon check if it supports a new screen resolution */ +int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var) +{ + struct fbcon_ops *ops = info->fbcon_par; + struct vc_data *vc; + unsigned int i; + + WARN_CONSOLE_UNLOCKED(); + + if (!ops) + return 0; + + /* prevent setting a screen size which is smaller than font size */ + for (i = first_fb_vc; i <= last_fb_vc; i++) { + vc = vc_cons[i].d; + if (!vc || vc->vc_mode != KD_TEXT || + fbcon_info_from_console(i) != info) + continue; + + if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) || + vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres)) + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL_GPL(fbcon_modechange_possible); + int fbcon_mode_deleted(struct fb_info *info, struct fb_videomode *mode) { |