switch_tplg: Implement tool for switching topologies

tools/switch_tplg/README.md

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+## Topology Switch Tool
+
+### switch_tplg.py switch_tplg.sh
+This tool allows switching to a different topology without rebooting the board. 
+
+### How to use the tool
+Copy both switch_tplg.py and switch_tplg.sh to the target hardware, ensuring they are in the same directory.
+
+To start the UI, run the following command on the board:
+```python3 switch_tplg.py```
+
+After selecting the topology, applying it will remove and reload the relevant kernel modules, allowing the new topology to take effect without requiring a reboot.

tools/switch_tplg/switch_tplg.py

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+import os
+import argparse
+import curses
+import subprocess
+
+os.chdir(os.path.dirname(os.path.abspath(__file__)))
+
+class TopologySelectorUI:
+
+    def __init__(self, tplg_path):
+        self.selected_tplg_file = None
+        self.tplg_path = tplg_path
+        self.tplg_files = self.scan_for_files('', '.tplg', extra_paths=[tplg_path])
+        self.tplg_files.sort()
+        if self.tplg_files:
+            self.selected_tplg_file = self.tplg_files[0]
+        self.run_ui()
+
+    def scan_for_files(self, directory_name: str, file_extension: str, extra_paths: list = None):
+        found_files = []
+        dir_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), directory_name)
+
+        if os.path.exists(dir_path):
+            found_files.extend([f for f in os.listdir(dir_path) if f.endswith(file_extension)])
+        else:
+            print(f"Error: The '{directory_name}' directory is missing. It should be located in the same folder as this script.")
+
+        if extra_paths:
+            for path in extra_paths:
+                if os.path.exists(path):
+                    found_files.extend([f for f in os.listdir(path) if f.endswith(file_extension)])
+                else:
+                    print(f"Warning: The directory '{path}' does not exist.")
+
+        return found_files
+
+    def run_ui(self):
+        curses.wrapper(self.main_menu)
+
+    def main_menu(self, stdscr):
+        curses.start_color()
+        self.initialize_colors()
+        stdscr.bkgd(' ', curses.color_pair(2))
+
+        current_row = 0
+        max_row = 3
+
+        while True:
+            stdscr.clear()
+            self.display_menu(stdscr, current_row)
+            key = stdscr.getch()
+
+            if key == curses.KEY_UP:
+                current_row = (current_row - 1) % (max_row + 1)
+            elif key == curses.KEY_DOWN:
+                current_row = (current_row + 1) % (max_row + 1)
+
+            actions = {
+                0: lambda: self.select_tplg_file(stdscr),
+                1: lambda: self.switch_topology(self.selected_tplg_file),
+                2: lambda: exit()
+            }
+
+            if key == 10:
+                if current_row in actions:
+                    actions[current_row]()
+                elif current_row == 3:
+                    break
+
+    def initialize_colors(self):
+        curses.init_pair(1, curses.COLOR_BLACK, 7)
+        curses.init_pair(2, curses.COLOR_WHITE, curses.COLOR_BLUE)
+
+    def display_menu(self, stdscr, current_row):
+        stdscr.addstr(0, 0, "---------------Topology Selector----------------", curses.A_BOLD)
+        stdscr.addstr(1, 0, "================================================")
+
+        menu = [
+            f"| Select Topology (Currently: {self.selected_tplg_file})",
+            "| Apply Selected Topology",
+            "| Quit "
+        ]
+
+        for idx, item in enumerate(menu):
+            color_pair = curses.color_pair(1) if idx == current_row else curses.color_pair(2)
+            stdscr.addstr(idx + 3, 0, item, color_pair)
+
+        stdscr.refresh()
+
+    def select_tplg_file(self, stdscr):
+        self.select_file_from_list(stdscr, self.tplg_files, "-----Select Topology-----")
+
+
+    def select_file_from_list(self, stdscr, file_list, title):
+        current_row = 0
+        offset = 0
+        max_visible_rows = curses.LINES - 2
+
+        while True:
+            stdscr.clear()
+            stdscr.addstr(0, 0, title, curses.A_BOLD)
+
+            visible_rows = min(max_visible_rows, len(file_list))
+
+            for idx in range(visible_rows):
+                file_idx = idx + offset
+                if file_idx >= len(file_list):
+                    break
+                file_name = file_list[file_idx]
+                color_pair = curses.color_pair(1) if file_idx == current_row else curses.color_pair(2)
+                stdscr.addstr(idx + 1, 0, file_name, color_pair)
+
+            stdscr.refresh()
+            key = stdscr.getch()
+
+            if key == curses.KEY_UP:
+                if current_row > 0:
+                    current_row -= 1
+                if current_row < offset:
+                    offset -= 1
+            elif key == curses.KEY_DOWN:
+                if current_row < len(file_list) - 1:
+                    current_row += 1
+                if current_row >= offset + visible_rows:
+                    offset += 1
+            elif key == curses.KEY_ENTER or key in [10, 13]:
+                self.selected_tplg_file = file_list[current_row]
+                self.switch_topology(self.selected_tplg_file)
+                break
+
+    def switch_topology(self, tplg_file):
+        tplg_full_path = os.path.join(self.tplg_path, tplg_file)
+        subprocess.run(['./switch_tplg.sh', tplg_full_path], check=True)
+        print(f"Switched to topology: {tplg_full_path}")
+
+def main():
+    parser = argparse.ArgumentParser(description="Topology Selector")
+    parser.add_argument('--tplg-path', default='/lib/firmware/imx/sof-tplg', help="Path to search for topology files (.tplg)")
+    args = parser.parse_args()
+
+    TopologySelectorUI(tplg_path=args.tplg_path)
+
+if __name__ == "__main__":
+    main()

tools/switch_tplg/switch_tplg.sh

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+#!/bin/sh
+
+selected_tplg=$1
+target_tplg="/lib/firmware/imx/sof-tplg/sof-imx8-wm8960.tplg"
+
+cp "$target_tplg" /lib/firmware/imx/sof-tplg/previous-topology.tplg
+
+rmmod snd_sof_imx8
+rmmod snd_sof_xtensa_dsp
+rmmod snd_sof_of
+rmmod imx_common
+rmmod snd_sof
+rmmod snd_sof_utils
+rmmod snd_soc_wm8960
+rmmod snd_soc_simple_card
+
+cp "$selected_tplg" "$target_tplg"
+
+modprobe snd_soc_simple_card
+modprobe snd_soc_wm8960
+modprobe snd_sof_utils
+modprobe snd_sof
+modprobe imx_common
+modprobe snd_sof_of
+modprobe snd_sof_xtensa_dsp
+modprobe snd_sof_imx8