target/linux/bcm27xx/patches-5.4/950-0477-drm-modes-parse_cmdline-Accept-extras-directly-after.patch

   1 From bc4d8c5519c74b9bdf4d35369ba76bac01be8ca2 Mon Sep 17 00:00:00 2001
   2 From: Hans de Goede <hdegoede@redhat.com>
   3 Date: Mon, 18 Nov 2019 16:51:25 +0100
   4 Subject: [PATCH] drm/modes: parse_cmdline: Accept extras directly
   5  after mode combined with options
   6
   7 Commit cfb0881b8f621b656a9e23b31944a5db94cf5842 upstream.
   8
   9 Before this commit it was impossible to combine an extra mode argument
  10 specified directly after the resolution with an option, e.g.
  11 video=HDMI-1:720x480e,rotate=180 would not work, either the "e" to force
  12 enable would need to be dropped or the ",rotate=180", otherwise the
  13 mode_option would not be accepted.
  14
  15 This commit fixes this by setting parse_extras to true in this case, so
  16 that drm_mode_parse_cmdline_res_mode() parses the extra arguments directly
  17 after the resolution.
  18
  19 Acked-by: Maxime Ripard <mripard@kernel.org>
  20 Signed-off-by: Hans de Goede <hdegoede@redhat.com>
  21 Link: https://patchwork.freedesktop.org/patch/msgid/20191118155134.30468-4-hdegoede@redhat.com
  22 ---
  23  drivers/gpu/drm/drm_modes.c                   |  1 +
  24  .../gpu/drm/selftests/drm_cmdline_selftests.h |  1 +
  25  .../drm/selftests/test-drm_cmdline_parser.c   | 24 +++++++++++++++++++
  26  3 files changed, 26 insertions(+)
  27
  28 --- a/drivers/gpu/drm/drm_modes.c
  29 +++ b/drivers/gpu/drm/drm_modes.c
  30 @@ -1801,6 +1801,7 @@ bool drm_mode_parse_command_line_for_con
  31                 mode_end = refresh_off;
  32         } else if (options_ptr) {
  33                 mode_end = options_off;
  34 +               parse_extras = true;
  35         } else {
  36                 mode_end = strlen(name);
  37                 parse_extras = true;
  38 --- a/drivers/gpu/drm/selftests/drm_cmdline_selftests.h
  39 +++ b/drivers/gpu/drm/selftests/drm_cmdline_selftests.h
  40 @@ -62,3 +62,4 @@ cmdline_test(drm_cmdline_test_margin_opt
  41  cmdline_test(drm_cmdline_test_multiple_options)
  42  cmdline_test(drm_cmdline_test_invalid_option)
  43  cmdline_test(drm_cmdline_test_bpp_extra_and_option)
  44 +cmdline_test(drm_cmdline_test_extra_and_option)
  45 --- a/drivers/gpu/drm/selftests/test-drm_cmdline_parser.c
  46 +++ b/drivers/gpu/drm/selftests/test-drm_cmdline_parser.c
  47 @@ -1029,6 +1029,30 @@ static int drm_cmdline_test_bpp_extra_an
  48         return 0;
  49  }
  50
  51 +static int drm_cmdline_test_extra_and_option(void *ignored)
  52 +{
  53 +       struct drm_cmdline_mode mode = { };
  54 +
  55 +       FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480e,rotate=180",
  56 +                                                          &no_connector,
  57 +                                                          &mode));
  58 +       FAIL_ON(!mode.specified);
  59 +       FAIL_ON(mode.xres != 720);
  60 +       FAIL_ON(mode.yres != 480);
  61 +       FAIL_ON(mode.rotation_reflection != DRM_MODE_ROTATE_180);
  62 +
  63 +       FAIL_ON(mode.refresh_specified);
  64 +       FAIL_ON(mode.bpp_specified);
  65 +
  66 +       FAIL_ON(mode.rb);
  67 +       FAIL_ON(mode.cvt);
  68 +       FAIL_ON(mode.interlace);
  69 +       FAIL_ON(mode.margins);
  70 +       FAIL_ON(mode.force != DRM_FORCE_ON);
  71 +
  72 +       return 0;
  73 +}
  74 +
  75  #include "drm_selftest.c"
  76
  77  static int __init test_drm_cmdline_init(void)