target/linux/bcm27xx/patches-4.19/950-0254-firmware-raspberrypi-Report-the-fw-variant-during-pr.patch

   1 From dfd66230d2d538e7f290436d2952124d6eadeb3d Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Thu, 10 Jan 2019 17:58:06 +0000
   4 Subject: [PATCH] firmware: raspberrypi: Report the fw variant during
   5  probe
   6
   7 The driver already reported the firmware build date during probe.
   8 The mailbox calls have been extended to also report the variant
   9  1 = standard start.elf
  10  2 = start_x.elf (includes camera stack)
  11  3 = start_db.elf (includes assert logging)
  12  4 = start_cd.elf (cutdown version for smallest memory footprint).
  13 Log the variant during probe.
  14
  15 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  16 ---
  17  drivers/firmware/raspberrypi.c             | 32 +++++++++++++++++-----
  18  include/soc/bcm2835/raspberrypi-firmware.h |  1 +
  19  2 files changed, 26 insertions(+), 7 deletions(-)
  20
  21 --- a/drivers/firmware/raspberrypi.c
  22 +++ b/drivers/firmware/raspberrypi.c
  23 @@ -227,21 +227,39 @@ static const struct attribute_group rpi_
  24  static void
  25  rpi_firmware_print_firmware_revision(struct rpi_firmware *fw)
  26  {
  27 +       static const char * const variant_strs[] = {
  28 +               "unknown",
  29 +               "start",
  30 +               "start_x",
  31 +               "start_db",
  32 +               "start_cd",
  33 +       };
  34 +       const char *variant_str = "cmd unsupported";
  35         u32 packet;
  36 +       u32 variant;
  37 +       struct tm tm;
  38         int ret = rpi_firmware_property(fw,
  39                                         RPI_FIRMWARE_GET_FIRMWARE_REVISION,
  40                                         &packet, sizeof(packet));
  41
  42 -       if (ret == 0) {
  43 -               struct tm tm;
  44 +       if (ret)
  45 +               return;
  46
  47 -               time64_to_tm(packet, 0, &tm);
  48 +       ret = rpi_firmware_property(fw, RPI_FIRMWARE_GET_FIRMWARE_VARIANT,
  49 +                                   &variant, sizeof(variant));
  50
  51 -               dev_info(fw->cl.dev,
  52 -                        "Attached to firmware from %04ld-%02d-%02d %02d:%02d\n",
  53 -                        tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
  54 -                        tm.tm_hour, tm.tm_min);
  55 +       if (!ret) {
  56 +               if (variant >= ARRAY_SIZE(variant_strs))
  57 +                       variant = 0;
  58 +               variant_str = variant_strs[variant];
  59         }
  60 +
  61 +       time64_to_tm(packet, 0, &tm);
  62 +
  63 +       dev_info(fw->cl.dev,
  64 +                "Attached to firmware from %04ld-%02d-%02d %02d:%02d, variant %s\n",
  65 +                tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour,
  66 +                tm.tm_min, variant_str);
  67  }
  68
  69  static void
  70 --- a/include/soc/bcm2835/raspberrypi-firmware.h
  71 +++ b/include/soc/bcm2835/raspberrypi-firmware.h
  72 @@ -41,6 +41,7 @@ struct rpi_firmware_property_tag_header
  73  enum rpi_firmware_property_tag {
  74         RPI_FIRMWARE_PROPERTY_END =                           0,
  75         RPI_FIRMWARE_GET_FIRMWARE_REVISION =                  0x00000001,
  76 +       RPI_FIRMWARE_GET_FIRMWARE_VARIANT =                   0x00000002,
  77
  78         RPI_FIRMWARE_SET_CURSOR_INFO =                        0x00008010,
  79         RPI_FIRMWARE_SET_CURSOR_STATE =                       0x00008011,