1. 04 Jul, 2022 3 commits
    • Liu Ying's avatar
      drm/bridge: fsl-ldb: Enable split mode for LVDS dual link · 57ef278e
      Liu Ying authored
      When LVDS dual link is used, we have to enable the LDB_CTRL_SPLIT_MODE bit.
      
      Fixes: 463db5c2 ("drm: bridge: ldb: Implement simple Freescale i.MX8MP LDB bridge")
      Cc: Andrzej Hajda <andrzej.hajda@intel.com>
      Cc: Neil Armstrong <narmstrong@baylibre.com>
      Cc: Robert Foss <robert.foss@linaro.org>
      Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
      Cc: Jonas Karlman <jonas@kwiboo.se>
      Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
      Cc: David Airlie <airlied@linux.ie>
      Cc: Daniel Vetter <daniel@ffwll.ch>
      Cc: Sam Ravnborg <sam@ravnborg.org>
      Cc: Marek Vasut <marex@denx.de>
      Cc: NXP Linux Team <linux-imx@nxp.com>
      Signed-off-by: default avatarLiu Ying <victor.liu@nxp.com>
      Reviewed-by: default avatarMarek Vasut <marex@denx.de>
      Signed-off-by: default avatarNeil Armstrong <narmstrong@baylibre.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20220701065634.4027537-3-victor.liu@nxp.com
      57ef278e
    • Liu Ying's avatar
      drm/bridge: fsl-ldb: Fix mode clock rate validation · 591129d3
      Liu Ying authored
      With LVDS dual link, up to 160MHz mode clock rate is supported.
      With LVDS single link, up to 80MHz mode clock rate is supported.
      Fix mode clock rate validation by swapping the maximum mode clock
      rates of the two link modes.
      
      Fixes: 463db5c2 ("drm: bridge: ldb: Implement simple Freescale i.MX8MP LDB bridge")
      Cc: Andrzej Hajda <andrzej.hajda@intel.com>
      Cc: Neil Armstrong <narmstrong@baylibre.com>
      Cc: Robert Foss <robert.foss@linaro.org>
      Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
      Cc: Jonas Karlman <jonas@kwiboo.se>
      Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
      Cc: David Airlie <airlied@linux.ie>
      Cc: Daniel Vetter <daniel@ffwll.ch>
      Cc: Sam Ravnborg <sam@ravnborg.org>
      Cc: Marek Vasut <marex@denx.de>
      Cc: NXP Linux Team <linux-imx@nxp.com>
      Signed-off-by: default avatarLiu Ying <victor.liu@nxp.com>
      Reviewed-by: default avatarMarek Vasut <marex@denx.de>
      Signed-off-by: default avatarNeil Armstrong <narmstrong@baylibre.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20220701065634.4027537-2-victor.liu@nxp.com
      591129d3
    • Thomas Zimmermann's avatar
      drm/aperture: Run fbdev removal before internal helpers · bf43e452
      Thomas Zimmermann authored
      Always run fbdev removal first to remove simpledrm via
      sysfb_disable(). This clears the internal state. The later call
      to drm_aperture_detach_drivers() then does nothing. Otherwise,
      with drm_aperture_detach_drivers() running first, the call to
      sysfb_disable() uses inconsistent state.
      
      Example backtrace show below:
      
      [   11.663422] ==================================================================
      [   11.663426] BUG: KASAN: use-after-free in device_del+0x79/0x5f0
      [   11.663435] Read of size 8 at addr ffff888108185050 by task systemd-udevd/311
      [   11.663440] CPU: 0 PID: 311 Comm: systemd-udevd Tainted: G            E     5
      	.19.0-rc2-1-default+ #1689
      [   11.663445] Hardware name: HP ProLiant DL120 G7, BIOS J01 04/21/2011
      [   11.663447] Call Trace:
      [   11.663449]  <TASK>
      [   11.663451]  ? device_del+0x79/0x5f0
      [   11.663456]  dump_stack_lvl+0x5b/0x73
      [   11.663462]  print_address_description.constprop.0+0x1f/0x1b0
      [   11.663468]  ? device_del+0x79/0x5f0
      [   11.663471]  ? device_del+0x79/0x5f0
      [   11.663475]  print_report.cold+0x3c/0x21c
      [   11.663481]  ? lock_acquired+0x87/0x1e0
      [   11.663484]  ? lock_acquired+0x87/0x1e0
      [   11.663489]  ? device_del+0x79/0x5f0
      [   11.663492]  kasan_report+0xbf/0xf0
      [   11.663498]  ? device_del+0x79/0x5f0
      [   11.663503]  device_del+0x79/0x5f0
      [   11.663509]  ? device_remove_attrs+0x170/0x170
      [   11.663514]  ? lock_is_held_type+0xe8/0x140
      [   11.663523]  platform_device_del.part.0+0x19/0xe0
      [   11.663530]  platform_device_unregister+0x1c/0x30
      [   11.663535]  sysfb_disable+0x2d/0x70
      [   11.663540]  remove_conflicting_framebuffers+0x1c/0xf0
      [   11.663546]  remove_conflicting_pci_framebuffers+0x130/0x1a0
      [   11.663554]  drm_aperture_remove_conflicting_pci_framebuffers+0x86/0xb0
      [   11.663561]  ? mgag200_pci_remove+0x30/0x30 [mgag200]
      [   11.663578]  mgag200_pci_probe+0x2d/0x140 [mgag200]
      Reported-by: default avatarZack Rusin <zackr@vmware.com>
      Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
      Reviewed-by: default avatarJavier Martinez Canillas <javierm@redhat.com>
      Reviewed-by: default avatarZack Rusin <zackr@vmware.com>
      Fixes: ee7a69aa ("fbdev: Disable sysfb device registration when removing conflicting FBs")
      Cc: Javier Martinez Canillas <javierm@redhat.com>
      Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
      Cc: Daniel Vetter <daniel@ffwll.ch>
      Cc: Sam Ravnborg <sam@ravnborg.org>
      Cc: Helge Deller <deller@gmx.de>
      Cc: Thomas Zimmermann <tzimmermann@suse.de>
      Cc: Alex Deucher <alexander.deucher@amd.com>
      Cc: Zhen Lei <thunder.leizhen@huawei.com>
      Cc: Changcheng Deng <deng.changcheng@zte.com.cn>
      Link: https://patchwork.freedesktop.org/patch/msgid/20220617121027.30273-1-tzimmermann@suse.de
      (cherry picked from commit fb84efa2)
      Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
      bf43e452
  2. 01 Jul, 2022 1 commit
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