tty: vt: define a common enum for VESA blanking constants

There are currently two places with VESA blanking constants definitions:
fb.h and console.h. Extract/unify the two to a separate header (vesa.h).

Given the fb's is in an uapi header, create the common header in uapi
too.

Note that instead of macros, an enum (vesa_blank_mode) is created. But
the macros are kept too (they now expand to the enum constants), just in
case someone in userspace performs some #ifdeffery.
Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-kernel@vger.kernel.org
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Helge Deller <deller@gmx.de> # parisc STI console
Link: https://lore.kernel.org/r/20240122110401.7289-33-jirislaby@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/console.h

@@ -18,6 +18,7 @@
 #include <linux/bits.h>
 #include <linux/rculist.h>
 #include <linux/types.h>
+#include <linux/vesa.h>
 
 struct vc_data;
 struct console_font_op;
@@ -520,12 +521,6 @@ void vcs_remove_sysfs(int index);
  */
 extern atomic_t ignore_console_lock_warning;
 
-/* VESA Blanking Levels */
-#define VESA_NO_BLANKING        0
-#define VESA_VSYNC_SUSPEND      1
-#define VESA_HSYNC_SUSPEND      2
-#define VESA_POWERDOWN          3
-
 extern void console_init(void);
 
 /* For deferred console takeover */

include/uapi/linux/fb.h

@@ -4,6 +4,7 @@
 
 #include <linux/types.h>
 #include <linux/i2c.h>
+#include <linux/vesa.h>
 
 /* Definitions of frame buffers						*/
 
@@ -293,13 +294,6 @@ struct fb_con2fbmap {
 	__u32 framebuffer;
 };
 
-/* VESA Blanking Levels */
-#define VESA_NO_BLANKING        0
-#define VESA_VSYNC_SUSPEND      1
-#define VESA_HSYNC_SUSPEND      2
-#define VESA_POWERDOWN          3
-
-
 enum {
 	/* screen: unblanked, hsync: on,  vsync: on */
 	FB_BLANK_UNBLANK       = VESA_NO_BLANKING,

include/uapi/linux/vesa.h

+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_LINUX_VESA_H
+#define _UAPI_LINUX_VESA_H
+
+/* VESA Blanking Levels */
+enum vesa_blank_mode {
+	VESA_NO_BLANKING	= 0,
+#define VESA_NO_BLANKING	VESA_NO_BLANKING
+	VESA_VSYNC_SUSPEND	= 1,
+#define VESA_VSYNC_SUSPEND	VESA_VSYNC_SUSPEND
+	VESA_HSYNC_SUSPEND	= 2,
+#define VESA_HSYNC_SUSPEND	VESA_HSYNC_SUSPEND
+	VESA_POWERDOWN		= VESA_VSYNC_SUSPEND | VESA_HSYNC_SUSPEND,
+#define VESA_POWERDOWN		VESA_POWERDOWN
+	VESA_BLANK_MAX		= VESA_POWERDOWN,
+};
+
+#endif