Input: document meanings of KEY_SCREEN and KEY_ZOOM

It is hard to say what KEY_SCREEN and KEY_ZOOM mean, but historically DVB
folks have used them to indicate switch to full screen mode. Later, they
converged on using KEY_ZOOM to switch into full screen mode and KEY)SCREEN
to control aspect ratio (see Documentation/media/uapi/rc/rc-tables.rst).

Let's commit to these uses, and define:

- KEY_FULL_SCREEN (and make KEY_ZOOM its alias)
- KEY_ASPECT_RATIO (and make KEY_SCREEN its alias)

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index ae366b87426a..bc5054e51bef 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h
@@ -439,10 +439,12 @@
 #define KEY_TITLE               0x171
 #define KEY_SUBTITLE            0x172
 #define KEY_ANGLE               0x173
-#define KEY_ZOOM                0x174
+#define KEY_FULL_SCREEN         0x174   /* AC View Toggle */
+#define KEY_ZOOM                KEY_FULL_SCREEN
 #define KEY_MODE                0x175
 #define KEY_KEYBOARD            0x176
-#define KEY_SCREEN              0x177
+#define KEY_ASPECT_RATIO        0x177   /* HUTRR37: Aspect */
+#define KEY_SCREEN              KEY_ASPECT_RATIO
 #define KEY_PC                  0x178   /* Media Select Computer */
 #define KEY_TV                  0x179   /* Media Select TV */
 #define KEY_TV2                 0x17a   /* Media Select Cable */