SDL: Always show the on-screen keyboard on Steam Deck

SDL Commits
1 
From 03a53ce0d12163ee5f7986f9603d2ac010fba947 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Thu, 20 Mar 2025 16:08:15 -0700
Subject: [PATCH] Always show the on-screen keyboard on Steam Deck

Steam will eventually have smarts about whether a keyboard is active and will igore the request appropriately.

Fixes https://github.com/libsdl-org/SDL/issues/12595
---
 src/video/SDL_video.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
index 1540e92b83eb1..3b2c9e26182a7 100644
--- a/src/video/SDL_video.c
+++ b/src/video/SDL_video.c
@@ -5416,6 +5416,10 @@ bool SDL_GetTextInputMultiline(SDL_PropertiesID props)
 static bool AutoShowingScreenKeyboard(void)
 {
     const char *hint = SDL_GetHint(SDL_HINT_ENABLE_SCREEN_KEYBOARD);
+    if (!hint) {
+        // Steam will eventually have smarts about whether a keyboard is active, so always request the on-screen keyboard on Steam Deck
+        hint = SDL_GetHint("SteamDeck");
+    }
     if (((!hint || SDL_strcasecmp(hint, "auto") == 0) && !SDL_HasKeyboard()) ||
         SDL_GetStringBoolean(hint, false)) {
         return true;