linux.git/drivers/gpu/drm/bridge/analogix, branch master

drm/bridge: analogix_dp: Fix PE/VS value shift mismatch during link training

2026-07-03T16:48:02+00:00

VS/PE values returned by drm_dp_get_adjust_request_voltage() and
drm_dp_get_adjust_request_pre_emphasis() are already encoded to their
native DPCD register bit positions. However, DPCD_VOLTAGE_SWING_SET /
DPCD_PRE_EMPHASIS_SET macros perform an extra internal shift. Feeding
the raw offset-bearing values directly leads to overlapping bitfields
and invalid lane training configuration, causing link training failures
and black screen.

Add right shift using DP_TRAIN_*_SHIFT constants to strip the DPCD bit
offsets before passing values to the SET macros and subsequent checks.
Apply this fix for both clock recovery and adjust training code paths.

Reported-by: Vicente Bergas 
Closes: https://lore.kernel.org/all/CAAMcf8D-d+5n=H44KeKBSqWY42m+o32W+mO-r15VqWNyYhJL7Q@mail.gmail.com/
Fixes: d84b087c7662 ("drm/bridge: analogix_dp: Apply DP helper APIs to get adjusted voltages and pre-emphasises")
Signed-off-by: Damon Ding 
Link: https://lore.kernel.org/all/CAAMcf8D-d+5n=H44KeKBSqWY42m+o32W+mO-r15VqWNyYhJL7Q@mail.gmail.com/
Signed-off-by: Heiko Stuebner 
Link: https://patch.msgid.link/20260623023506.309858-1-damon.ding@rock-chips.com

Merge tag 'wq-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2026-06-17T10:57:44+00:00

Pull workqueue updates from Tejun Heo:

 - Continued progress toward making alloc_workqueue() unbound by
   default: more callers converted to WQ_PERCPU / system_percpu_wq /
   system_dfl_wq, and new warnings for queues that use neither WQ_PERCPU
   nor WQ_UNBOUND or the legacy system_wq / system_unbound_wq.

 - Misc: drop the now-trivial apply_wqattrs_lock()/unlock() wrappers,
   forbid the TEST_WORKQUEUE benchmark from being built-in, and fix a
   spurious pointer level in the worker debug-dump path.

* tag 'wq-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  drm/bridge: anx7625: Add WQ_PERCPU add to alloc_workqueue
  wifi: ath6kl: fix invalid workqueue flags in ath6kl_usb_create()
  btrfs: Drop WQ_PERCPU from ordered_flags in btrfs_init_workqueues()
  workqueue: Add warnings and ensure one among WQ_PERCPU or WQ_UNBOUND is present
  workqueue: Add warnings and fallback if system_{unbound}_wq is used
  workqueue: drop spurious '*' from print_worker_info() fn declaration
  workqueue: forbid TEST_WORKQUEUE from being built-in
  workqueue: drop apply_wqattrs_lock()/unlock() wrappers
  umh: replace use of system_unbound_wq with system_dfl_wq
  rapidio: rio: add WQ_PERCPU to alloc_workqueue users
  media: ddbridge: add WQ_PERCPU to alloc_workqueue users
  platform: cznic: turris-omnia-mcu: replace use of system_wq with system_percpu_wq
  media: synopsys: hdmirx: replace use of system_unbound_wq with system_dfl_wq
  virt: acrn: Add WQ_PERCPU to alloc_workqueue users

drm/bridge: anx7625: Add WQ_PERCPU add to alloc_workqueue

2026-06-14T22:02:10+00:00

This continues the effort to refactor workqueue APIs, which began with
the introduction of new workqueues and a new alloc_workqueue flag in:

   commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq")
   commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag")

The refactoring is going to alter the default behavior of
alloc_workqueue() to be unbound by default.

With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND),
any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND
must now use WQ_PERCPU. For more details see the Link tag below.

In order to keep alloc_workqueue() behavior identical, explicitly request
WQ_PERCPU.

Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/
Suggested-by: Tejun Heo 
Signed-off-by: Marco Crivellari 
Reviewed-by: Thomas Zimmermann 
Signed-off-by: Tejun Heo

Merge tag 'drm-misc-next-2026-05-07' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

2026-05-08T04:16:04+00:00

drm-misc-next for v7.2-rc1:

UAPI Changes:
- Support medium/low power modes in amdxdna.
- Support limiting frequency in ivpu.
- Document license for drm core uAPI headers.
- Add the following DRM formats: P230, Y7, XYYY2101010, T430,
  XVUY210101010.

Cross-subsystem Changes:
- Add and improve dt-bindings.
- Remove unused dma-fence-array's signal_on_any support.

Core Changes:
- Do not call drop_master on file close if not master.
- Convert drm-bridge and drm/atomic to use drm_printf_indent.
- Remove the extra call to drm_connector_attach_encoder after
  drm_bridge_connector_init().
- Assorted docbook updates.

Driver Changes:
- Bugfixes in amdxdna, ivpu, mipi-dsi, imagination, nouveau, panthor,
  bridge/analogix_dp, ipv3, lontium-lt8912b, verisilicon, tve200,
  etnaviv, panel/focaltech-ota7290b, panel/jadard-jd9365da-h3,
  bridge/ite-it6263, renesas, xlnx, bridge/cdns-dsi, gma500,
  bridge/microchip-lvds, mgag200.
- Add support for MStar TSUMU88ADT3-LF-1 bridge.
- Add support for WaveShare 7, Novatek NT35532, Startek KD070HDFLD092,
  ChipWealth CH13726A AMOLED, Team Source Display TST070WSNE-196C,
  Displaytech DT050BTFT-PTS panels.
- Improve mipi-dsi shutdown and convert a panasonic panel to use the
  mipi-dsi wrappers.
- Allowing dumping vbios over debugfs in GSP-RM mode.
- Update maintainers for ivpu, add reviewer for drm-bridge code
  and update maintainers for LT8912B DRM HDMI bridge.
- Add test pattern support to bridge/ti-sn65dsi83.
- Convert vmwgfx to vblank timers.
- Add power management to sysfb drm drivers to allow suspend/resume.
- Support the aforementioned new drm formats in xlnx/qynqmp.
- Fix panel Kconfig dependencies.
- Add carveout support for debugging and bringup to amxdna.
- Add support for long command tx via videobuffer in bridge/tc358768.

Signed-off-by: Dave Airlie 

From: Maarten Lankhorst 
Link: https://patch.msgid.link/f73f342d-6efb-416d-81b0-1716bdd98d5f@linux.intel.com

Merge tag 'drm-misc-next-2026-04-20' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

2026-05-06T00:12:25+00:00

drm-misc-next for v7.1-rc1:

UAPI Changes:
- Expose per-client BO memory usage via fdinfo in amdxdna. (Hou)
- Change the default priority of drm scheduler to fair. (Tvrtko)

Cross-subsystem Changes:
- Revert hugetlb support in udmabuf. (Gunthorpe)
- Fix error in udmabuf with CONFIG_DMA_API_DEBUG(/ _SG). (Gavrilov)
- Add Docbook for DRM_IOCTL_SYNCOBJ_EVENTFD, (Ser)
  clarify drm_bridge_get/put. (Tvrtko)
- Change signature of drm_connector_attach_hdr_output_metadata_property. (Canal)
- Use IOVA allocations in gpusvm and pagemap APIs. (Brost)
- Fix tracepoints vs dma-fence lifetime. (Tvrtko)
- Convert st-dma*.c tests to use kunit. (Gunthorpe)

Core Changes:
- Deduplicate counter and timestamp retrieval in vblank code. (Ville)
- Parse AMD VSDB v3 in CTA extension blocks, and use it in amdgpu. (Chen)
- Prevent bridge and encoder chain changes at inopportune times. (Ceresoli)
- Map the run queue 1:1 to the drm scheduler. (Tvrtko)

Driver Changes:
- Assorted bugfixes and (documentation) updates to rockchip, bridge/synopsis,
  panfrost, tidss, accel/qaic, tilcdc, vc4, ast, imagination, panthor,
  renesas, accel/amdxdna, msxfb, bridge/imx8mp, nouveau.
  bridge/analogix_dp, bridge/exynos_dp, omap.
- Add support for CSW PNB601LS1-2, LGD LP116WHA-SPB1, panels.
- Add support for a lot of waveshare panels (Baryshkov)
- Support for AIE4 devices in accel/wamdxdna. (Zhang)
- Enable support for GEM shrinking in panthor. (Goel/Brezillon)
- Runtime Power Management is added to v3d. (Canal)
- Allow panel probing and use the panel bridge helper in analogix_dp. (Ding)
- Support XRGB1555 and C8 in mgag and XRGB1555 in ast. (Zimmermann)

From: Maarten Lankhorst 
Link: https://patch.msgid.link/bf31b1a1-951b-4f60-b226-22e8c083697d@linux.intel.com
Signed-off-by: Dave Airlie

drm/bridge: analogix_dp: Extract error pointer from correct variable

2026-05-04T06:59:57+00:00

In devm_drm_panel_bridge_add() error path the pointer error should be
extracted from dp->plat_data->next_bridge but instead it is extracted
from bridge, which is a valid pointer and not part of this error path.

Extract error pointer from correct variable.

Detected by Smatch:
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c:1489 analogix_dp_bind()
warn: passing a valid pointer to 'PTR_ERR'

Fixes: 1b86a69b61df4 ("drm/bridge: analogix_dp: Apply panel_bridge helper")
Signed-off-by: Ethan Tidmore 
Reviewed-by: Luca Ceresoli 
Reviewed-by: Damon Ding 
Link: https://patch.msgid.link/20260429030840.704252-1-ethantidmore06@gmail.com
[Luca: add lkp report lines]
Reported-by: kernel test robot 
Closes: https://lore.kernel.org/oe-kbuild-all/202605032334.MuQfn1mP-lkp@intel.com/
Signed-off-by: Luca Ceresoli

drm: Rename struct drm_atomic_state to drm_atomic_commit

2026-05-04T04:05:04+00:00

The KMS framework uses two slightly different definitions for the state
concept. For a given object (plane, CRTC, encoder, etc., so
drm_$OBJECT_state), the state is the entire state of that object.
However, at the device level, drm_atomic_state refers to a state update
for a limited number of objects.

Thus, drm_atomic_state isn't the entire device state, but only the full
state of some objects in that device. This has been an endless source of
confusion and thus bugs.

We can rename the drm_atomic_state structure to drm_atomic_commit to
make it less confusing.

This patch was created using:

rg -l drm_atomic_state | \
	xargs sed -i 's/drm_atomic_state/drm_atomic_commit/g; s/drm_atomic_commit_helper/drm_atomic_state_helper/g'
mv drivers/gpu/drm/tests/drm_atomic_state_test.c drivers/gpu/drm/tests/drm_atomic_commit_test.c

Acked-by: Simona Vetter 
Acked-by: Thomas Zimmermann 
Acked-by: Jani Nikula 
Reviewed-by: Luca Ceresoli 
Tested-by: Luca Ceresoli 
Signed-off-by: Maxime Ripard 
Signed-off-by: Dave Airlie 
Link: https://patch.msgid.link/20260427-drm-drm-atomic-update-v4-1-c0e713bfdf25@kernel.org

drm/bridge: analogix_dp: Apply panel_bridge helper

2026-04-13T15:43:46+00:00

In order to unify the handling of the panel and bridge, apply
panel_bridge helpers for Analogix DP driver. With this patch, the
bridge support will also become available.

The following changes have ben made:
- Apply plane_bridge helper to wrap the panel as the bridge.
- Remove the explicit panel APIs calls, which can be replaced with
  the automic bridge APIs calls wrapped by the panel.
- Remove the unnecessary analogix_dp_bridge_get_modes().

Signed-off-by: Damon Ding 
Reviewed-by: Dmitry Baryshkov 
Tested-by: Marek Szyprowski 
Tested-by: Heiko Stuebner  # rk3588
Link: https://patch.msgid.link/20260413132551.1049307-9-damon.ding@rock-chips.com
Signed-off-by: Luca Ceresoli

drm/bridge: analogix_dp: Remove bridge disabing and panel unpreparing in analogix_dp_unbind()

2026-04-13T15:43:46+00:00

The analogix_dp_unbind() should be balanced with analogix_dp_bind().
There are no bridge enabling and panel preparing in analogix_dp_bind(),
so it should be reasonable to remove the bridge disabing and panel
unpreparing in analogix_dp_unbind().

Signed-off-by: Damon Ding 
Reviewed-by: Dmitry Baryshkov 
Reviewed-by: Luca Ceresoli 
Tested-by: Marek Szyprowski 
Tested-by: Heiko Stuebner  # rk3588
Link: https://patch.msgid.link/20260413132551.1049307-8-damon.ding@rock-chips.com
Signed-off-by: Luca Ceresoli

drm/bridge: analogix_dp: Attach the next bridge in analogix_dp_bridge_attach()

2026-04-13T15:43:45+00:00

Uniformly, move the next bridge attachment to the Analogix side
rather than scattered on Rockchip and Exynos sides. It can also
help get rid of the callback &analogix_dp_plat_data.attach() and
make codes more concise.

Signed-off-by: Damon Ding 
Reviewed-by: Dmitry Baryshkov 
Reviewed-by: Luca Ceresoli 
Tested-by: Marek Szyprowski 
Tested-by: Heiko Stuebner  # rk3588
Link: https://patch.msgid.link/20260413132551.1049307-7-damon.ding@rock-chips.com
Signed-off-by: Luca Ceresoli