tty: vt: remove CM_* constants

There is no difference between CM_MOVE and CM_DRAW. Either of them
enables the cursor. CM_ERASE then disables cursor.

So get rid of all of them and use simple "bool enable".

Note that this propagates down to the fbcon code.

And document the hook.

Signed-off-by: "Jiri Slaby (SUSE)" <[e-mail]>
Cc: Helge Deller <[e-mail]>
Cc: "James E.J. Bottomley" <[e-mail]>
Cc: Daniel Vetter <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Tested-by: Helge Deller <[e-mail]> # parisc STI console
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/vt/vt.c

···
 	if (vc_is_sel(vc))
 		clear_selection();
 
-	vc->vc_sw->con_cursor(vc, CM_ERASE);
+	vc->vc_sw->con_cursor(vc, false);
 	hide_softcursor(vc);
 }
 
···
 			clear_selection();
 		add_softcursor(vc);
 		if (CUR_SIZE(vc->vc_cursor_type) != CUR_NONE)
-			vc->vc_sw->con_cursor(vc, CM_DRAW);
+			vc->vc_sw->con_cursor(vc, true);
 	} else
 		hide_cursor(vc);
 }

drivers/video/console/dummycon.c

···
 static void dummycon_deinit(struct vc_data *vc) { }
 static void dummycon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx,
 			   unsigned int width) { }
-static void dummycon_cursor(struct vc_data *vc, int mode) { }
+static void dummycon_cursor(struct vc_data *vc, bool enable) { }
 
 static bool dummycon_scroll(struct vc_data *vc, unsigned int top,
 			    unsigned int bottom, enum con_scroll dir,

drivers/video/console/mdacon.c

···
 	}
 }
 
-static void mdacon_cursor(struct vc_data *c, int mode)
+static void mdacon_cursor(struct vc_data *c, bool enable)
 {
-	if (mode == CM_ERASE) {
+	if (!enable) {
 		mda_set_cursor(mda_vram_len - 1);
 		return;
 	}

drivers/video/console/newport_con.c

···
 	}
 }
 
-static void newport_cursor(struct vc_data *vc, int mode)
+static void newport_cursor(struct vc_data *vc, bool enable)
 {
 	unsigned short treg;
 	int xcurs, ycurs;
 
 	treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 
-	if (mode == CM_ERASE) {
+	if (!enable) {
 		newport_vc2_set(npregs, VC2_IREG_CONTROL,
 				(treg & ~(VC2_CTRL_ECDISP)));
 		return;

drivers/video/console/sticon.c

···
     }
 }
 
-static void sticon_cursor(struct vc_data *conp, int mode)
+static void sticon_cursor(struct vc_data *conp, bool enable)
 {
     unsigned short car1;
 
···
 	return;
 
     car1 = conp->vc_screenbuf[conp->state.x + conp->state.y * conp->vc_cols];
-    if (mode == CM_ERASE) {
+    if (!enable) {
 	sti_putc(sticon_sti, car1, conp->state.y, conp->state.x,
 		 font_data[conp->vc_num]);
 	return;
···
     if (vga_is_gfx)
         return false;
 
-    sticon_cursor(conp, CM_ERASE);
+    sticon_cursor(conp, false);
 
     switch (dir) {
     case SM_UP:

drivers/video/console/vgacon.c

···
 	raw_spin_unlock_irqrestore(&vga_lock, flags);
 }
 
-static void vgacon_cursor(struct vc_data *c, int mode)
+static void vgacon_cursor(struct vc_data *c, bool enable)
 {
 	unsigned int c_height;
 
···
 
 	write_vga(14, (c->vc_pos - vga_vram_base) / 2);
 
-	if (mode == CM_ERASE) {
+	if (!enable) {
 	        if (vga_video_type >= VIDEO_TYPE_VGAC)
 			vgacon_set_cursor_size(31, 30);
 		else
···
 			        /* void size to cause regs to be rewritten */
 				cursor_size_lastfrom = 0;
 				cursor_size_lastto = 0;
-				c->vc_sw->con_cursor(c, CM_DRAW);
+				c->vc_sw->con_cursor(c, true);
 			}
 			c->vc_font.height = c->vc_cell_height = fontheight;
 			vc_resize(c, 0, rows);	/* Adjust console size */

drivers/video/fbdev/core/bitblit.c

···
 	}
 }
 
-static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+static void bit_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
 		       int fg, int bg)
 {
 	struct fb_cursor cursor;
···
 			mask[i++] = msk;
 	}
 
-	ops->cursor_state.enable = (mode != CM_ERASE) && !use_sw;
+	ops->cursor_state.enable = enable && !use_sw;
 
 	cursor.image.data = src;
 	cursor.image.fg_color = ops->cursor_state.image.fg_color;

drivers/video/fbdev/core/fbcon.c

···
 	struct fb_info *info;
 	struct vc_data *vc = NULL;
 	int c;
-	int mode;
+	bool enable;
 	int ret;
 
 	/* FIXME: we should sort out the unbind locking instead */
···
 	}
 
 	c = scr_readw((u16 *) vc->vc_pos);
-	mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
-		CM_ERASE : CM_DRAW;
-	ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
+	enable = ops->cursor_flash && !ops->cursor_state.enable;
+	ops->cursor(vc, info, enable, get_color(vc, info, c, 1),
 		    get_color(vc, info, c, 0));
 	console_unlock();
 
···
 		ops->clear_margins(vc, info, margin_color, bottom_only);
 }
 
-static void fbcon_cursor(struct vc_data *vc, int mode)
+static void fbcon_cursor(struct vc_data *vc, bool enable)
 {
 	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
 	struct fbcon_ops *ops = info->fbcon_par;
···
 	else
 		fbcon_add_cursor_work(info);
 
-	ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
+	ops->cursor_flash = enable;
 
 	if (!ops->cursor)
 		return;
 
-	ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
+	ops->cursor(vc, info, enable, get_color(vc, info, c, 1),
 		    get_color(vc, info, c, 0));
 }
 
···
 	if (fbcon_is_inactive(vc, info))
 		return true;
 
-	fbcon_cursor(vc, CM_ERASE);
+	fbcon_cursor(vc, false);
 
 	/*
 	 * ++Geert: Only use ywrap/ypan if the console is in text mode
···
  	if (!fbcon_is_inactive(vc, info)) {
 		if (ops->blank_state != blank) {
 			ops->blank_state = blank;
-			fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
+			fbcon_cursor(vc, !blank);
 			ops->cursor_flash = (!blank);
 
 			if (fb_blank(info, blank))
···
 	vc = vc_cons[ops->currcon].d;
 
 	/* Clear cursor, restore saved data */
-	fbcon_cursor(vc, CM_ERASE);
+	fbcon_cursor(vc, false);
 }
 
 void fbcon_resumed(struct fb_info *info)

drivers/video/fbdev/core/fbcon.h

···
 		      int fg, int bg);
 	void (*clear_margins)(struct vc_data *vc, struct fb_info *info,
 			      int color, int bottom_only);
-	void (*cursor)(struct vc_data *vc, struct fb_info *info, int mode,
-		       int fg, int bg);
+	void (*cursor)(struct vc_data *vc, struct fb_info *info,
+		       bool enable, int fg, int bg);
 	int  (*update_start)(struct fb_info *info);
 	int  (*rotate_font)(struct fb_info *info, struct vc_data *vc);
 	struct fb_var_screeninfo var;  /* copy of the current fb_var_screeninfo */

drivers/video/fbdev/core/fbcon_ccw.c

···
 	}
 }
 
-static void ccw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+static void ccw_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
 		       int fg, int bg)
 {
 	struct fb_cursor cursor;
···
 		kfree(tmp);
 	}
 
-	ops->cursor_state.enable = (mode != CM_ERASE) && !use_sw;
+	ops->cursor_state.enable = enable && !use_sw;
 
 	cursor.image.data = src;
 	cursor.image.fg_color = ops->cursor_state.image.fg_color;

drivers/video/fbdev/core/fbcon_cw.c

···
 	}
 }
 
-static void cw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+static void cw_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
 		      int fg, int bg)
 {
 	struct fb_cursor cursor;
···
 		kfree(tmp);
 	}
 
-	ops->cursor_state.enable = (mode != CM_ERASE) && !use_sw;
+	ops->cursor_state.enable = enable && !use_sw;
 
 	cursor.image.data = src;
 	cursor.image.fg_color = ops->cursor_state.image.fg_color;

drivers/video/fbdev/core/fbcon_ud.c

···
 	}
 }
 
-static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+static void ud_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
 		      int fg, int bg)
 {
 	struct fb_cursor cursor;
···
 			mask[i++] = ~msk;
 	}
 
-	ops->cursor_state.enable = (mode != CM_ERASE) && !use_sw;
+	ops->cursor_state.enable = enable && !use_sw;
 
 	cursor.image.data = src;
 	cursor.image.fg_color = ops->cursor_state.image.fg_color;

drivers/video/fbdev/core/tileblit.c

···
 	return;
 }
 
-static void tile_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+static void tile_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
 			int fg, int bg)
 {
 	struct fb_tilecursor cursor;
···
 
 	cursor.sx = vc->state.x;
 	cursor.sy = vc->state.y;
-	cursor.mode = (mode == CM_ERASE || use_sw) ? 0 : 1;
+	cursor.mode = enable && !use_sw;
 	cursor.fg = fg;
 	cursor.bg = bg;
 

include/linux/console.h

···
  * @con_putc:   emit one character with attributes @ca to [@x, @y] on @vc.
  *		(optional -- @con_putcs would be called instead)
  * @con_putcs:  emit @count characters with attributes @s to [@x, @y] on @vc.
+ * @con_cursor: enable/disable cursor depending on @enable
  * @con_scroll: move lines from @top to @bottom in direction @dir by @lines.
  *		Return true if no generic handling should be done.
  *		Invoked by csi_M and printing to the console.
···
 	void	(*con_putcs)(struct vc_data *vc, const u16 *s,
 			     unsigned int count, unsigned int ypos,
 			     unsigned int xpos);
-	void	(*con_cursor)(struct vc_data *vc, int mode);
+	void	(*con_cursor)(struct vc_data *vc, bool enable);
 	bool	(*con_scroll)(struct vc_data *vc, unsigned int top,
 			unsigned int bottom, enum con_scroll dir,
 			unsigned int lines);
···
 static inline void con_debug_enter(struct vc_data *vc) { }
 static inline void con_debug_leave(void) { }
 #endif
-
-/* cursor */
-#define CM_DRAW     (1)
-#define CM_ERASE    (2)
-#define CM_MOVE     (3)
 
 /*
  * The interface for a console, or any other device that wants to capture