| #!/bin/sh |
| # Copyright 2020 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| . /usr/share/misc/shflags |
| |
| # Not used; but caller provides it. |
| DEFINE_string 'device' '' "i2c device name" 'd' |
| |
| # Parse command line. |
| FLAGS "$@" || exit 1 |
| eval set -- "${FLAGS_ARGV}" |
| |
| |
| # Wacom EMR doesn't support power-cut-tolerant ID. |
| # Reads panel vendor_id and product_id to determine wacom firmware. |
| main() { |
| local vendor_id |
| local product_id |
| local hardware_id |
| local oem_id |
| for path in /sys/class/drm/*eDP*/edid; do |
| # Check path is exist, otherwise hexdump hits error |
| if [ -e "${path}" ]; then |
| # EDID 0x8-0x9 is Manufacturer ID |
| vendor_id="$(hexdump -n 0xc "${path}" | awk '{print $6}' | sed '/^\s*$/d')" |
| # EDID 0xa-0xb is Manufacturer product code |
| product_id="$(hexdump -n 0xc "${path}" | awk '{print $7}' | sed '/^\s*$/d')" |
| if [ -n "${product_id}" ]; then |
| hardware_id="${vendor_id}_${product_id}" |
| fi |
| fi |
| done |
| oem_id="$(cros_config / oem-id)" |
| |
| case "${hardware_id}" in |
| "745e_2c34"|"832c_0508") |
| ## 745e(Wistron), 832c(KDC) |
| |
| # The same hardware_id may be returned for projects with two different |
| # OEMs. To prevent collisions, Nami wacom firmware files are prefixed |
| # with the oem-id. |
| # This would break product_id parsing, but that is never used for Nami |
| # projects anyway. |
| echo "oem${oem_id}_${hardware_id}" |
| ;; |
| *) |
| ## Unknown hardware_id, not output anything. |
| esac |
| } |
| |
| main "$@" |
