From acfc788233263fee9413434d39d4201a8de592ba Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 9 Oct 2023 23:18:41 +0200 Subject: vgacon: remove screen_info dependency The vga console driver is fairly self-contained, and only used by architectures that explicitly initialize the screen_info settings. Chance every instance that picks the vga console by setting conswitchp to call a function instead, and pass a reference to the screen_info there. Reviewed-by: Javier Martinez Canillas Acked-by: Khalid Azzi Acked-by: Helge Deller Signed-off-by: Arnd Bergmann Link: https://lore.kernel.org/r/20231009211845.3136536-6-arnd@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/video/console/vgacon.c | 68 +++++++++++++++++++++++++----------------- 1 file changed, 40 insertions(+), 28 deletions(-) (limited to 'drivers/video/console/vgacon.c') diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c index 7ad047bcae17..8ef1579fa57f 100644 --- a/drivers/video/console/vgacon.c +++ b/drivers/video/console/vgacon.c @@ -89,6 +89,8 @@ static int vga_video_font_height; static int vga_scan_lines __read_mostly; static unsigned int vga_rolled_over; /* last vc_origin offset before wrap */ +static struct screen_info *vga_si; + static bool vga_hardscroll_enabled; static bool vga_hardscroll_user_enable = true; @@ -153,8 +155,9 @@ static const char *vgacon_startup(void) u16 saved1, saved2; volatile u16 *p; - if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB || - screen_info.orig_video_isVGA == VIDEO_TYPE_EFI) { + if (!vga_si || + vga_si->orig_video_isVGA == VIDEO_TYPE_VLFB || + vga_si->orig_video_isVGA == VIDEO_TYPE_EFI) { no_vga: #ifdef CONFIG_DUMMY_CONSOLE conswitchp = &dummy_con; @@ -164,29 +167,29 @@ static const char *vgacon_startup(void) #endif } - /* boot_params.screen_info reasonably initialized? */ - if ((screen_info.orig_video_lines == 0) || - (screen_info.orig_video_cols == 0)) + /* vga_si reasonably initialized? */ + if ((vga_si->orig_video_lines == 0) || + (vga_si->orig_video_cols == 0)) goto no_vga; /* VGA16 modes are not handled by VGACON */ - if ((screen_info.orig_video_mode == 0x0D) || /* 320x200/4 */ - (screen_info.orig_video_mode == 0x0E) || /* 640x200/4 */ - (screen_info.orig_video_mode == 0x10) || /* 640x350/4 */ - (screen_info.orig_video_mode == 0x12) || /* 640x480/4 */ - (screen_info.orig_video_mode == 0x6A)) /* 800x600/4 (VESA) */ + if ((vga_si->orig_video_mode == 0x0D) || /* 320x200/4 */ + (vga_si->orig_video_mode == 0x0E) || /* 640x200/4 */ + (vga_si->orig_video_mode == 0x10) || /* 640x350/4 */ + (vga_si->orig_video_mode == 0x12) || /* 640x480/4 */ + (vga_si->orig_video_mode == 0x6A)) /* 800x600/4 (VESA) */ goto no_vga; - vga_video_num_lines = screen_info.orig_video_lines; - vga_video_num_columns = screen_info.orig_video_cols; + vga_video_num_lines = vga_si->orig_video_lines; + vga_video_num_columns = vga_si->orig_video_cols; vgastate.vgabase = NULL; - if (screen_info.orig_video_mode == 7) { + if (vga_si->orig_video_mode == 7) { /* Monochrome display */ vga_vram_base = 0xb0000; vga_video_port_reg = VGA_CRT_IM; vga_video_port_val = VGA_CRT_DM; - if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { + if ((vga_si->orig_video_ega_bx & 0xff) != 0x10) { static struct resource ega_console_resource = { .name = "ega", .flags = IORESOURCE_IO, @@ -223,12 +226,12 @@ static const char *vgacon_startup(void) vga_vram_base = 0xb8000; vga_video_port_reg = VGA_CRT_IC; vga_video_port_val = VGA_CRT_DC; - if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { + if ((vga_si->orig_video_ega_bx & 0xff) != 0x10) { int i; vga_vram_size = 0x8000; - if (!screen_info.orig_video_isVGA) { + if (!vga_si->orig_video_isVGA) { static struct resource ega_console_resource = { .name = "ega", .flags = IORESOURCE_IO, @@ -319,14 +322,14 @@ static const char *vgacon_startup(void) || vga_video_type == VIDEO_TYPE_VGAC || vga_video_type == VIDEO_TYPE_EGAM) { vga_hardscroll_enabled = vga_hardscroll_user_enable; - vga_default_font_height = screen_info.orig_video_points; - vga_video_font_height = screen_info.orig_video_points; + vga_default_font_height = vga_si->orig_video_points; + vga_video_font_height = vga_si->orig_video_points; /* This may be suboptimal but is a safe bet - go with it */ vga_scan_lines = vga_video_font_height * vga_video_num_lines; } - vgacon_xres = screen_info.orig_video_cols * VGA_FONTWIDTH; + vgacon_xres = vga_si->orig_video_cols * VGA_FONTWIDTH; vgacon_yres = vga_scan_lines; return display_desc; @@ -371,7 +374,7 @@ static void vgacon_init(struct vc_data *c, int init) /* Only set the default if the user didn't deliberately override it */ if (global_cursor_default == -1) global_cursor_default = - !(screen_info.flags & VIDEO_FLAGS_NOCURSOR); + !(vga_si->flags & VIDEO_FLAGS_NOCURSOR); } static void vgacon_deinit(struct vc_data *c) @@ -589,7 +592,7 @@ static int vgacon_switch(struct vc_data *c) { int x = c->vc_cols * VGA_FONTWIDTH; int y = c->vc_rows * c->vc_cell_height; - int rows = screen_info.orig_video_lines * vga_default_font_height/ + int rows = vga_si->orig_video_lines * vga_default_font_height/ c->vc_cell_height; /* * We need to save screen size here as it's the only way @@ -609,7 +612,7 @@ static int vgacon_switch(struct vc_data *c) if ((vgacon_xres != x || vgacon_yres != y) && (!(vga_video_num_columns % 2) && - vga_video_num_columns <= screen_info.orig_video_cols && + vga_video_num_columns <= vga_si->orig_video_cols && vga_video_num_lines <= rows)) vgacon_doresize(c, c->vc_cols, c->vc_rows); } @@ -1056,13 +1059,13 @@ static int vgacon_resize(struct vc_data *c, unsigned int width, * Ho ho! Someone (svgatextmode, eh?) may have reprogrammed * the video mode! Set the new defaults then and go away. */ - screen_info.orig_video_cols = width; - screen_info.orig_video_lines = height; + vga_si->orig_video_cols = width; + vga_si->orig_video_lines = height; vga_default_font_height = c->vc_cell_height; return 0; } - if (width % 2 || width > screen_info.orig_video_cols || - height > (screen_info.orig_video_lines * vga_default_font_height)/ + if (width % 2 || width > vga_si->orig_video_cols || + height > (vga_si->orig_video_lines * vga_default_font_height)/ c->vc_cell_height) return -EINVAL; @@ -1092,8 +1095,8 @@ static void vgacon_save_screen(struct vc_data *c) * console initialization routines. */ vga_bootup_console = 1; - c->state.x = screen_info.orig_x; - c->state.y = screen_info.orig_y; + c->state.x = vga_si->orig_x; + c->state.y = vga_si->orig_y; } /* We can't copy in more than the size of the video buffer, @@ -1186,4 +1189,13 @@ const struct consw vga_con = { }; EXPORT_SYMBOL(vga_con); +void vgacon_register_screen(struct screen_info *si) +{ + if (!si || vga_si) + return; + + conswitchp = &vga_con; + vga_si = si; +} + MODULE_LICENSE("GPL"); -- cgit v1.2.3