#!/bin/bash

# omarchy:summary=Detect whether the computer has an NVIDIA GPU without GSP firmware (Maxwell/Pascal/Volta).

# Bounded at both ends, because the callers install the 580xx driver on a match
# and it supports exactly this span. GSP firmware arrived with Turing, which is
# also where device IDs cross 0x1e00. Maxwell opens at 0x1340, one ID after the
# last Kepler part; anything older needs a legacy driver we don't package.
#
# Read the cached sysfs IDs rather than lspci, which reads PCI config space and
# resumes runtime-suspended GPUs.
pci_devices_path="${OMARCHY_PCI_DEVICES_PATH:-/sys/bus/pci/devices}"

shopt -s nullglob

for device in "$pci_devices_path"/*; do
  [[ $(< "$device/vendor") == "0x10de" ]] || continue
  [[ $(< "$device/class") == 0x03* ]] || continue
  device_id=$(< "$device/device")
  (( device_id >= 0x1340 && device_id < 0x1e00 )) && exit 0
done

exit 1