target/linux/bcm27xx/patches-5.4/950-0485-drm-modes-parse_cmdline-Set-bpp-refresh_specified-af.patch

   1 From 5b7efd2fa0c75164373d6faf28fec4b89065d39c Mon Sep 17 00:00:00 2001
   2 From: Hans de Goede <hdegoede@redhat.com>
   3 Date: Mon, 18 Nov 2019 16:51:28 +0100
   4 Subject: [PATCH] drm/modes: parse_cmdline: Set bpp/refresh_specified
   5  after successful parsing
   6
   7 Commit 6a2d163756545aa3180d7851d5f8322b865e72be upstream.
   8
   9 drm_connector_get_cmdline_mode() calls
  10 drm_mode_parse_command_line_for_connector() with &connector->cmdline_mode
  11 as mode argument, so anything which we store in the mode arguments gets
  12 kept even if we return false.
  13
  14 Avoid storing a possibly false-postive bpp/refresh_specified setting
  15 in connector->cmdline_mode by moving the setting of these to after
  16 successful parsing of the bpp/refresh parts of the video= argument.
  17
  18 Acked-by: Maxime Ripard <mripard@kernel.org>
  19 Signed-off-by: Hans de Goede <hdegoede@redhat.com>
  20 Link: https://patchwork.freedesktop.org/patch/msgid/20191118155134.30468-7-hdegoede@redhat.com
  21 ---
  22  drivers/gpu/drm/drm_modes.c | 9 +++++----
  23  1 file changed, 5 insertions(+), 4 deletions(-)
  24
  25 --- a/drivers/gpu/drm/drm_modes.c
  26 +++ b/drivers/gpu/drm/drm_modes.c
  27 @@ -1778,10 +1778,8 @@ bool drm_mode_parse_command_line_for_con
  28
  29         /* Try to locate the bpp and refresh specifiers, if any */
  30         bpp_ptr = strchr(name, '-');
  31 -       if (bpp_ptr) {
  32 +       if (bpp_ptr)
  33                 bpp_off = bpp_ptr - name;
  34 -               mode->bpp_specified = true;
  35 -       }
  36
  37         refresh_ptr = strchr(name, '@');
  38         if (refresh_ptr) {
  39 @@ -1789,7 +1787,6 @@ bool drm_mode_parse_command_line_for_con
  40                         return false;
  41
  42                 refresh_off = refresh_ptr - name;
  43 -               mode->refresh_specified = true;
  44         }
  45
  46         /* Locate the start of named options */
  47 @@ -1832,6 +1829,8 @@ bool drm_mode_parse_command_line_for_con
  48                 ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode);
  49                 if (ret)
  50                         return false;
  51 +
  52 +               mode->bpp_specified = true;
  53         }
  54
  55         if (refresh_ptr) {
  56 @@ -1839,6 +1838,8 @@ bool drm_mode_parse_command_line_for_con
  57                                                      &refresh_end_ptr, mode);
  58                 if (ret)
  59                         return false;
  60 +
  61 +               mode->refresh_specified = true;
  62         }
  63
  64         /*