linux-stable.git/drivers/gpu/drm/panel, branch master

drm/panel: himax-hx83102: restore MODE_LPM after sending disable cmds

2026-05-05T12:43:36+00:00

When preparing the panel, it seems that it always expects commands to be
transferred in LP mode. However, the disable function removes the
MIPI_DSI_MODE_LPM flag, and no other function re-adds it.

As the unprepare function contains no DSI commands, re-adding the flag
just after disabling the panel should be safe. Add the code re-adding
the flag after the two commands for disabling the panel are sent.

This fixes screen unblanking (after blanking once) on
mt8188-geralt-ciri-sku1 device.

Cc: stable@vger.kernel.org # 6.11+
Fixes: 0ef94554dc40 ("drm/panel: himax-hx83102: Break out as separate driver")
Signed-off-by: Icenowy Zheng 
Reviewed-by: Neil Armstrong 
Reviewed-by: Douglas Anderson 
Signed-off-by: Neil Armstrong 
Link: https://patch.msgid.link/20260425165751.1716569-1-zhengxingda@iscas.ac.cn

drm/panel: boe-tv101wum-nl6: restore MODE_LPM after sending disable cmds

2026-05-05T12:43:36+00:00

When preparing the panel, it seems that it always expects commands to be
transferred in LP mode. However, the disable function removes the
MIPI_DSI_MODE_LPM flag, and no other function re-adds it.

As the unprepare function contains no DSI commands, re-adding the flag
just after disabling the panel should be safe. Add the code re-adding
the flag after the two commands for disabling the panel are sent.

This fixes error messages shown in kernel log when unblanking on
mt8183-kukui-kodama-sku32 device.

Cc: stable@vger.kernel.org
Fixes: a869b9db7adf ("drm/panel: support for boe tv101wum-nl6 wuxga dsi video mode panel")
Signed-off-by: Icenowy Zheng 
Reviewed-by: Neil Armstrong 
Reviewed-by: Douglas Anderson 
Signed-off-by: Neil Armstrong 
Link: https://patch.msgid.link/20260503091708.1079962-1-zhengxingda@iscas.ac.cn

drm/panel: feiyang-fy07024di26a30d: return display-on error

2026-05-05T12:43:36+00:00

mipi_dsi_dcs_set_display_on() returns an error code, but feiyang_enable()
currently ignores it and always reports success.

Return the DCS command result so callers can observe enable failures.

Signed-off-by: Christian Van 
Reviewed-by: Neil Armstrong 
Signed-off-by: Neil Armstrong 
Link: https://patch.msgid.link/20260425053948.117714-1-cvan20191@gmail.com

drm/panel: hx83121a: select DRM_DISPLAY_DSC_HELPER

2026-05-05T12:43:36+00:00

Like a number of other panel drivers, this newly merged driver
needs DRM_DISPLAY_DSC_HELPER to be enabled:

arm-linux-gnueabi-ld: drivers/gpu/drm/panel/panel-himax-hx83121a.o: in function `himax_prepare':
panel-himax-hx83121a.c:(.text+0x1024): undefined reference to `drm_dsc_pps_payload_pack'

Fixes: a7c61963b727 ("drm/panel: Add Himax HX83121A panel driver")
Signed-off-by: Arnd Bergmann 
Reviewed-by: Neil Armstrong 
Reviewed-by: David Heidelberg 
Signed-off-by: Neil Armstrong 
Link: https://patch.msgid.link/20260413071043.3829868-1-arnd@kernel.org

drm/panel: himax-hx83121a: Fix incorrect error check for devm_drm_panel_alloc()

2026-05-05T12:43:36+00:00

Check devm_drm_panel_alloc() return value for ERR_PTR instead of NULL.
devm_drm_panel_alloc() returns an ERR_PTR on failure, never NULL. Using
a NULL check skips the error path and may cause a NULL pointer
dereference.

Fixes: a7c61963b727 ("drm/panel: Add Himax HX83121A panel driver")
Signed-off-by: Chen Ni 
Reviewed-by: Pengyu Luo 
Signed-off-by: Neil Armstrong 
Link: https://patch.msgid.link/20260327021728.647182-1-nichen@iscas.ac.cn

Merge tag 'drm-fixes-2026-04-24' of https://gitlab.freedesktop.org/drm/kernel

2026-04-24T18:44:52+00:00

Pull more drm fixes from Dave Airlie:
 "These are the regular fixes that have built up over last couple of
  weeks, all pretty minor and spread all over.

  atomic:
   - raise the vblank timeout to avoid it on virtual drivers
   - fix colorop duplication

  bridge:
   - stm_lvds: state check fix
   - dw-mipi-dsi: bridge reference leak fix

  panel:
   - visionx-rm69299: init fix

  dma-fence:
   - fix sparse warning

  dma-buf:
   - UAF fix

  panthor:
   - mapping fix

  arcgpu:
   - device_node reference leak fix

  nouveau:
   - memory leak in error path fix
   - overflow in reloc path for old hw fix

  hv:
   - Kconfig fix

  v3d:
   - infinite loop fix"

* tag 'drm-fixes-2026-04-24' of https://gitlab.freedesktop.org/drm/kernel:
  drm/nouveau: fix u32 overflow in pushbuf reloc bounds check
  MAINTAINERS: split hisilicon maintenance and add Yongbang Shi for hibmc-drm matainers
  drm/v3d: Reject empty multisync extension to prevent infinite loop
  drm/panel: visionox-rm69299: Make use of prepare_prev_first
  drm/drm_atomic: duplicate colorop states if plane color pipeline in use
  drm/nouveau: fix nvkm_device leak on aperture removal failure
  hv: Select CONFIG_SYSFB only for CONFIG_HYPERV_VMBUS
  dma-fence: Silence sparse warning in dma_fence_describe
  drm/bridge: dw-mipi-dsi: Fix bridge leak when host attach fails
  drm/arcpgu: fix device node leak
  drm/panthor: Fix outdated function documentation
  drm/panthor: Extend VM locked region for remap case to be a superset
  dma-buf: fix UAF in dma_buf_put() tracepoint
  drm/bridge: stm_lvds: Do not fail atomic_check on disabled connector
  drm/atomic: Increase timeout in drm_atomic_helper_wait_for_vblanks()

drm/panel: visionox-rm69299: Make use of prepare_prev_first

2026-04-17T14:08:29+00:00

The DSI link must be powered up to let panel driver to talk to the panel
during prepare() callback execution. Set the prepare_prev_first flag to
guarantee this.

Fixes: 9e15123eca79 ("drm/msm/dsi: Stop unconditionally powering up DSI hosts at modeset")
Signed-off-by: Guido Günther 
Signed-off-by: David Heidelberg 
Reviewed-by: Neil Armstrong 
Reviewed-by: Douglas Anderson 
Signed-off-by: Douglas Anderson 
Link: https://patch.msgid.link/20260417-axolotl-display-v2-1-8ce5341e46c2@ixit.cz

drm/panel: simple: Correct G190EAN01 prepare timing

2026-03-26T09:00:05+00:00

The prepare timing specified by the G190EAN01 datasheet should be
between 30 and 50 ms. Considering it might take some time for the
LVDS encoder to enable the signal, we should only wait the min.
required time in the panel driver and not the max. allowed time.

Fixes: 2f7b832fc992 ("drm/panel: simple: Add support for AUO G190EAN01 panel")
Signed-off-by: Sebastian Reichel 
Signed-off-by: Ian Ray 
Reviewed-by: Neil Armstrong 
Signed-off-by: Neil Armstrong 
Link: https://patch.msgid.link/20260217142528.68613-1-ian.ray@gehealthcare.com

drm/panel: himax-hx83102: Add support for DSI DCS backlight control

2026-03-26T09:00:05+00:00

The HTF065H045 panel based on the HX83102 controller does use DCS
commands for controlling backlight brightness. Make the driver fall back
to DCS when no external backlight has been defined in the device tree,
like many other drivers do.

Signed-off-by: Val Packett 
Reviewed-by: Neil Armstrong 
Signed-off-by: Neil Armstrong 
Link: https://patch.msgid.link/20260217070121.190108-5-val@packett.cool

drm/panel: himax-hx83102: Add support for Holitech HTF065H045

2026-03-26T09:00:04+00:00

This 720x1600 panel is found in several Motorola/Lenovo smartphones like
the Moto G9 Play (guamp). The initialization sequence is based on the
datasheet. Add it to the existing HX83102 panel driver.

Signed-off-by: Val Packett 
Reviewed-by: Neil Armstrong 
Signed-off-by: Neil Armstrong 
Link: https://patch.msgid.link/20260217070121.190108-4-val@packett.cool