linux-toradex.git/drivers/gpu/drm/mgag200, branch master

drm/panic: Display panic screen via per-plane callback

2026-09-17T07:16:31+00:00

Add display_panic_screen to struct drm_plane_funcs. If set on a plane,
register a panic handler for the plane from the DRM core's panic
handling. Invoke this helper from the core to display a panic screen.

The new callback replaces get_scanout_buffer as signal for panic
support in a plane. Using get_scanout_buffer is now merely a detail
of the implementation. This will also free struct drm_scanout_buffer
for use cases besides panic handling.

With display_panic_screen in place, rename draw_panic_plane() to
drm_plane_helper_display_panic_screen() and make it available to DRM
drivers via drm_panic_helper.h. Do not change the implementation or
functionality of this code. drm_plane_helper_display_panic_screen()
still supports kernel messages, user messages and QR codes on various
color formats.

Then update all drivers that implement panic support. Provide the
initializer macro DRM_PANIC_PLANE_FUNCS that sets display_panic_screen
to drm_plane_helper_display_panic_screen(). If panic handling has
been disabled, it instead clears the callback. There's again no change
in functionality.

This logically splits panic handling into a set of entry points in the
DRM code and a set of helper functions provided by drivers. The core
invokes the driver's helper via callback, while the driver can tailor
the implementation to its needs. Panic handling now works like most
other interfaces in the DRM framework.

Locking and state-handling happens in the DRM core or helpers. Drivers
that receive a call to display_panic_screen can assume that no concurrent
modeset takes place on the plane or its CRTC.

Also update the documentation. Move information about locking and state
guarantees from drm_panic_trylock() to display_panic_screen, where
drivers authors can find it easily. Move information about the features
of the current implementation to drm_panic_helper_display_panic_screen().

v4:
- remove obsolete comment about fbcon interference (Jocelyn)
v2:
- only consider planes with get_scanout_buffer (Sashiko)
- set callback for planes create with drm_crtc_init() (Sashiko)
- return errno code from display_panic_screen

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Jocelyn Falempe 
Link: https://patch.msgid.link/20260911124540.279841-12-tzimmermann@suse.de

drm/mgag200: Convert to atomic_create_state

2026-08-31T13:17:53+00:00

The mgag200 crtc implementation provides a custom reset hook. However,
this hook only allocates the state, initializes it with
__drm_atomic_helper_crtc_reset(), and frees the previous state. It
does not perform any hardware reset.

Since this is exactly what the atomic_create_state hook is meant to
do, minus the old state cleanup which the caller handles, convert the
implementation to use atomic_create_state with
__drm_atomic_helper_crtc_state_init() instead.

Reviewed-by: Thomas Zimmermann 
Link: https://patch.msgid.link/20260821-drm-no-more-crtc-reset-v1-53-fb793475c05a@kernel.org
Signed-off-by: Maxime Ripard

drm: Consistently define pci_device_ids using named initializers

2026-06-17T09:07:01+00:00

The .driver_data member of the various struct pci_device_id arrays were
initialized by list expressions. This isn't easily readable if you're
not into PCI. Using the PCI_DEVICE macro and named initializers is more
explicit and thus easier to parse. Also skip explicit assignments of 0
(which the compiler then takes care of).

This change doesn't introduce changes to the compiled pci_device_id
arrays. Tested on x86 and arm64.

v2:
- gma500: fix coding style in cast

Signed-off-by: Uwe Kleine-König (The Capable Hub) 
Reviewed-by: Patrik Jakobsson 
Reviewed-by: Thomas Zimmermann 
Signed-off-by: Thomas Zimmermann 
Link: https://patch.msgid.link/20260504150537.2136760-2-u.kleine-koenig@baylibre.com

Merge drm/drm-next into drm-misc-next

2026-05-07T14:17:01+00:00

Merge drm-next to bring the drm_atomic_state renaming patch.

Signed-off-by: Maxime Ripard

drm/mgag200: Drop unused include of

2026-05-07T08:41:00+00:00

The  header only defines radeon_PCI_IDS which isn't
used in the mgag200 driver. So drop the useless include statement.

Signed-off-by: Uwe Kleine-König (The Capable Hub) 
Reviewed-by: Thomas Zimmermann 
Signed-off-by: Thomas Zimmermann 
Link: https://patch.msgid.link/b81a4830b3c287e9360197693a823a0dc72c674c.1777545446.git.u.kleine-koenig@baylibre.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: 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/mgag200: Enable DRM_FORMAT_XRGB1555 on the primary plane

2026-04-20T07:15:57+00:00

The driver already sets the format for the depth value in the XMULCTRL
register. Add the format to the other switch statements, set the helpers
for gamma correction and export the XRGB1555 in the primary plane's
format array.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Jocelyn Falempe 
Link: https://patch.msgid.link/20260415152625.101710-7-tzimmermann@suse.de

drm/mgag200: Enable DRM_FORMAT_C8 on the primary plane

2026-04-20T07:15:57+00:00

The driver already contains all format setting for DRM_FORMAT_C8. Set
the gamma-correction helpers and add the format to the array of plane
formats.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Jocelyn Falempe 
Link: https://patch.msgid.link/20260415152625.101710-6-tzimmermann@suse.de

drm/mgag200: g200se: Set hiprilvl from DRM format

2026-04-20T07:15:57+00:00

Replace the deprecated cpp field from struct drm_format_info with the
format's 4CC code when setting the hiprilvl field in CRTCEXT6.

Using a bpp of 32 for RGB888 is a bit dubious, but we keep it for now
to avoid changing behavior. Otherwise, bpp could also be retrieved by
calling drm_format_info_bpp().

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Jocelyn Falempe 
Link: https://patch.msgid.link/20260415152625.101710-5-tzimmermann@suse.de