ui/sdl2-input: use trace-events to debug key events

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-id: 20200516072014.7766-8-vr_qemu@t-online.de
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

ui/sdl2-input.c

@@ -27,6 +27,7 @@
 #include "ui/console.h"
 #include "ui/input.h"
 #include "ui/sdl2.h"
+#include "trace.h"
 
 void sdl2_process_key(struct sdl2_console *scon,
                       SDL_KeyboardEvent *ev)
@@ -38,6 +39,8 @@ void sdl2_process_key(struct sdl2_console *scon,
         return;
     }
     qcode = qemu_input_map_usb_to_qcode[ev->keysym.scancode];
+    trace_sdl2_process_key(ev->keysym.scancode, qcode,
+                           ev->type == SDL_KEYDOWN ? "down" : "up");
     qkbd_state_key_event(scon->kbd, qcode, ev->type == SDL_KEYDOWN);
 
     if (!qemu_console_is_graphic(con)) {

ui/trace-events

@@ -75,6 +75,9 @@ input_event_abs(int conidx, const char *axis, int value) "con %d, axis %s, value
 input_event_sync(void) ""
 input_mouse_mode(int absolute) "absolute %d"
 
+# sdl2-input.c
+sdl2_process_key(int sdl_scancode, int qcode, const char *action) "translated SDL scancode %d to QKeyCode %d (%s)"
+
 # spice-display.c
 qemu_spice_add_memslot(int qid, uint32_t slot_id, unsigned long virt_start, unsigned long virt_end, int async) "%d %u: host virt 0x%lx - 0x%lx async=%d"
 qemu_spice_del_memslot(int qid, uint32_t gid, uint32_t slot_id) "%d gid=%u sid=%u"