chore: close session — commit all remaining pre-existing state

Finalize all non-artifact changes accumulated from other sessions:
- config updates, recipe changes, source edits, patches
- pkgar/cache artifacts intentionally excluded (build outputs)

This is the maximum achievable scope for this session.
Hardware-accelerated KDE blocked by: QML gate, KWin/Plasma builds,
hardware GPU validation — all require build system + physical GPU.

local/recipes/drivers/ohcid/source/src/main.rs

@@ -2,7 +2,9 @@ mod registers;
 
 use std::env;
 use std::process;
-use log::{info, error, LevelFilter};
+use std::fs;
+use log::{info, error, warn, LevelFilter};
+use registers::*;
 
 struct StderrLogger;
 impl log::Log for StderrLogger {
@@ -14,10 +16,20 @@ impl log::Log for StderrLogger {
 fn main() {
     log::set_logger(&StderrLogger).ok();
     log::set_max_level(LevelFilter::Info);
-    let channel_fd: usize = match env::var("PCID_CLIENT_CHANNEL") {
-        Ok(s) => match s.parse() { Ok(fd) => fd, Err(_) => { error!("invalid PCID_CLIENT_CHANNEL"); process::exit(1); } },
+    let _fd = match env::var("PCID_CLIENT_CHANNEL") {
+        Ok(s) => match s.parse::<usize>() { Ok(fd) => fd, Err(_) => { error!("invalid PCID_CLIENT_CHANNEL"); process::exit(1); } },
         Err(_) => { error!("PCID_CLIENT_CHANNEL not set"); process::exit(1); }
     };
-    info!("OHCI USB 1.1 controller (PCI fd: {})", channel_fd);
-    info!("ohcid: ready");
+    let device_path = env::var("PCID_DEVICE_PATH").unwrap_or_default();
+    info!("OHCI USB 1.1 at {}", device_path);
+    let config_path = format!("{}/config", device_path);
+    match fs::read(&config_path) {
+        Ok(data) if data.len() >= 0x14 => {
+            let bar0 = u32::from_le_bytes([data[0x10], data[0x11], data[0x12], data[0x13]]);
+            info!("OHCI MMIO base: 0x{:08X} (BAR0)", bar0 & 0xFFFFFFF0);
+            info!("ohcid: MMIO detected, ready for port enumeration");
+        }
+        _ => warn!("cannot read PCI config"),
+    }
+    loop { std::thread::sleep(std::time::Duration::from_secs(10)); }
 }