target/linux/ipq40xx/patches-6.1/421-firmware-qcom-scm-disable-SDI-on-Google-WiFi.patch

   1 From a658ad57c2b9d46eb5395c7bb8cf83b8e0f289e7 Mon Sep 17 00:00:00 2001
   2 From: Brian Norris <computersforpeace@gmail.com>
   3 Date: Fri, 28 Jul 2023 12:02:19 +0200
   4 Subject: [PATCH 2/3] firmware: qcom: scm: disable SDI on Google WiFi
   5
   6 Google WiFi seems to have SDI (Secure Debug Image) enabled by default which
   7 prevents normal reboot from working causing the board to just hang after
   8 reboot is called.
   9
  10 So lets disable SDI during SCM probe on Google WiFi boards in order to
  11 avoid a state where WDT will kick in and then the board will just hang
  12 in the debug mode.
  13
  14 Signed-off-by: Brian Norris <computersforpeace@gmail.com>
  15 ---
  16  drivers/firmware/qcom_scm.c | 7 +++++++
  17  1 file changed, 7 insertions(+)
  18
  19 --- a/drivers/firmware/qcom_scm.c
  20 +++ b/drivers/firmware/qcom_scm.c
  21 @@ -1435,6 +1435,13 @@ static int qcom_scm_probe(struct platfor
  22         if (download_mode)
  23                 qcom_scm_set_download_mode(true);
  24
  25 +       /*
  26 +        * Factory firmware leaves SDI (a debug interface), which prevents
  27 +        * clean reboot.
  28 +        */
  29 +       if (of_machine_is_compatible("google,wifi"))
  30 +               qcom_scm_disable_sdi();
  31 +
  32         return 0;
  33  }
  34