1. 15 Jan, 2020 14 commits
  2. 14 Jan, 2020 1 commit
  3. 13 Jan, 2020 5 commits
  4. 12 Jan, 2020 2 commits
    • Arnd Bergmann's avatar
      drm/drm_panel: fix export of drm_panel_of_backlight, try #3 · 8d6cb2f7
      Arnd Bergmann authored
      Making this IS_REACHABLE() was still wrong, as that just determines
      whether the lower-level backlight code would be reachable from the panel
      driver. However, with CONFIG_DRM=y and CONFIG_BACKLIGHT_CLASS_DEVICE=m,
      the drm_panel_of_backlight is left out of drm_panel.o but the condition
      tells the driver that it is there, leading to multiple link errors such as
      
      ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-sitronix-st7701.ko] undefined!
      ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-sharp-ls043t1le01.ko] undefined!
      ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-seiko-43wvf1g.ko] undefined!
      ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-ronbo-rb070d30.ko] undefined!
      ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-rocktech-jh057n00900.ko] undefined!
      ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.ko] undefined!
      ERROR: "drm_panel_of_backlight" [drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.ko] undefined!
      
      Change the condition to check for whether the function was actually part
      of the drm module. This version of the patch survived a few hundred
      randconfig builds, so I have a good feeling this might be the last
      one for the export.
      
      Fixes: 4a34a9dc ("drm/drm_panel: Fix EXPORT of drm_panel_of_backlight() one more time")
      Fixes: 907aa265 ("drm/drm_panel: fix EXPORT of drm_panel_of_backlight")
      Fixes: 152dbdea ("drm/panel: add backlight support")
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200107203231.920256-1-arnd@arndb.de
      8d6cb2f7
    • Arnd Bergmann's avatar
      drm: panel: fix excessive stack usage in td028ttec1_prepare · dba9bf0a
      Arnd Bergmann authored
      With gcc -O3 in combination with the structleak plug, the compiler can
      inline very aggressively, leading to rather large stack usage:
      
      drivers/gpu/drm/panel/panel-tpo-td028ttec1.c: In function 'td028ttec1_prepare':
      drivers/gpu/drm/panel/panel-tpo-td028ttec1.c:233:1: error: the frame size of 2768 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
       }
      
      Marking jbt_reg_write_*() as noinline avoids the case where
      multiple instances of this function get inlined into the same
      stack frame and each one adds a copy of 'tx_buf'.
      
      The compiler is clearly making some bad decisions here, but I
      did not open a new bug report as this only happens in combination
      with the structleak plugin.
      
      This fixes mmtom ("init/Kconfig: enable -O3 for all arches")
      
      Link: https://lore.kernel.org/lkml/CAK8P3a3jAnFZA3GFRtdYdg1-i-oih3pOQzkkrK-X3BGsFrMiZQ@mail.gmail.com/Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: Sam Ravnborg <sam@ravnborg.org> [fix indent]
      Link: https://patchwork.freedesktop.org/patch/msgid/20200108135116.3687988-1-arnd@arndb.de
      dba9bf0a
  5. 11 Jan, 2020 2 commits
  6. 10 Jan, 2020 2 commits
  7. 09 Jan, 2020 14 commits