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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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f453ba0460
Add mode setting support to the DRM layer.
This is a fairly big chunk of work that allows DRM drivers to provide
full output control and configuration capabilities to userspace. It was
motivated by several factors:
- the fb layer's APIs aren't suited for anything but simple
configurations
- coordination between the fb layer, DRM layer, and various userspace
drivers is poor to non-existent (radeonfb excepted)
- user level mode setting drivers makes displaying panic & oops
messages more difficult
- suspend/resume of graphics state is possible in many more
configurations with kernel level support
This commit just adds the core DRM part of the mode setting APIs.
Driver specific commits using these new structure and APIs will follow.
Co-authors: Jesse Barnes <jbarnes@virtuousgeek.org>, Jakob Bornecrantz <jakob@tungstengraphics.com>
Contributors: Alan Hourihane <alanh@tungstengraphics.com>, Maarten Maathuis <madman2003@gmail.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
161 lines
5.2 KiB
C
161 lines
5.2 KiB
C
/*
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* linux/include/linux/console.h
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*
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* Copyright (C) 1993 Hamish Macdonald
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*
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* Changed:
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* 10-Mar-94: Arno Griffioen: Conversion for vt100 emulator port from PC LINUX
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*/
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#ifndef _LINUX_CONSOLE_H_
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#define _LINUX_CONSOLE_H_ 1
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#include <linux/types.h>
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struct vc_data;
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struct console_font_op;
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struct console_font;
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struct module;
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struct tty_struct;
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/*
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* this is what the terminal answers to a ESC-Z or csi0c query.
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*/
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#define VT100ID "\033[?1;2c"
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#define VT102ID "\033[?6c"
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struct consw {
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struct module *owner;
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const char *(*con_startup)(void);
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void (*con_init)(struct vc_data *, int);
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void (*con_deinit)(struct vc_data *);
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void (*con_clear)(struct vc_data *, int, int, int, int);
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void (*con_putc)(struct vc_data *, int, int, int);
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void (*con_putcs)(struct vc_data *, const unsigned short *, int, int, int);
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void (*con_cursor)(struct vc_data *, int);
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int (*con_scroll)(struct vc_data *, int, int, int, int);
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void (*con_bmove)(struct vc_data *, int, int, int, int, int, int);
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int (*con_switch)(struct vc_data *);
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int (*con_blank)(struct vc_data *, int, int);
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int (*con_font_set)(struct vc_data *, struct console_font *, unsigned);
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int (*con_font_get)(struct vc_data *, struct console_font *);
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int (*con_font_default)(struct vc_data *, struct console_font *, char *);
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int (*con_font_copy)(struct vc_data *, int);
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int (*con_resize)(struct vc_data *, unsigned int, unsigned int,
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unsigned int);
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int (*con_set_palette)(struct vc_data *, unsigned char *);
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int (*con_scrolldelta)(struct vc_data *, int);
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int (*con_set_origin)(struct vc_data *);
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void (*con_save_screen)(struct vc_data *);
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u8 (*con_build_attr)(struct vc_data *, u8, u8, u8, u8, u8, u8);
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void (*con_invert_region)(struct vc_data *, u16 *, int);
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u16 *(*con_screen_pos)(struct vc_data *, int);
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unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *);
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};
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extern const struct consw *conswitchp;
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extern const struct consw dummy_con; /* dummy console buffer */
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extern const struct consw vga_con; /* VGA text console */
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extern const struct consw newport_con; /* SGI Newport console */
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extern const struct consw prom_con; /* SPARC PROM console */
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int con_is_bound(const struct consw *csw);
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int register_con_driver(const struct consw *csw, int first, int last);
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int unregister_con_driver(const struct consw *csw);
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int take_over_console(const struct consw *sw, int first, int last, int deflt);
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void give_up_console(const struct consw *sw);
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/* scroll */
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#define SM_UP (1)
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#define SM_DOWN (2)
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/* cursor */
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#define CM_DRAW (1)
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#define CM_ERASE (2)
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#define CM_MOVE (3)
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/*
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* The interface for a console, or any other device that wants to capture
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* console messages (printer driver?)
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*
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* If a console driver is marked CON_BOOT then it will be auto-unregistered
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* when the first real console is registered. This is for early-printk drivers.
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*/
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#define CON_PRINTBUFFER (1)
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#define CON_CONSDEV (2) /* Last on the command line */
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#define CON_ENABLED (4)
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#define CON_BOOT (8)
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#define CON_ANYTIME (16) /* Safe to call when cpu is offline */
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#define CON_BRL (32) /* Used for a braille device */
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struct console {
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char name[16];
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void (*write)(struct console *, const char *, unsigned);
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int (*read)(struct console *, char *, unsigned);
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struct tty_driver *(*device)(struct console *, int *);
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void (*unblank)(void);
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int (*setup)(struct console *, char *);
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int (*early_setup)(void);
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short flags;
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short index;
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int cflag;
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void *data;
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struct console *next;
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};
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extern int console_set_on_cmdline;
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extern int add_preferred_console(char *name, int idx, char *options);
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extern int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, char *options);
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extern void register_console(struct console *);
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extern int unregister_console(struct console *);
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extern struct console *console_drivers;
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extern void acquire_console_sem(void);
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extern int try_acquire_console_sem(void);
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extern void release_console_sem(void);
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extern void console_conditional_schedule(void);
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extern void console_unblank(void);
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extern struct tty_driver *console_device(int *);
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extern void console_stop(struct console *);
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extern void console_start(struct console *);
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extern int is_console_locked(void);
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extern int braille_register_console(struct console *, int index,
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char *console_options, char *braille_options);
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extern int braille_unregister_console(struct console *);
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extern int console_suspend_enabled;
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/* Suspend and resume console messages over PM events */
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extern void suspend_console(void);
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extern void resume_console(void);
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int mda_console_init(void);
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void prom_con_init(void);
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void vcs_make_sysfs(struct tty_struct *tty);
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void vcs_remove_sysfs(struct tty_struct *tty);
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/* Some debug stub to catch some of the obvious races in the VT code */
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#if 1
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#define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress)
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#else
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#define WARN_CONSOLE_UNLOCKED()
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#endif
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/* VESA Blanking Levels */
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#define VESA_NO_BLANKING 0
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#define VESA_VSYNC_SUSPEND 1
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#define VESA_HSYNC_SUSPEND 2
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#define VESA_POWERDOWN 3
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#ifdef CONFIG_VGA_CONSOLE
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extern bool vgacon_text_force(void);
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#endif
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#endif /* _LINUX_CONSOLE_H */
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