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a2646fdfbc66da4556868ed94159b36bda9968bd
linux/drivers/gpu/drm
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Derek Foreman a2646fdfbc drm: writeback: Document behaviour for framebuffer size mismatch 
Currently we have not explicitly defined the behaviour when the width
and height of the writeback framebuffer do not match the width and
height of the attached CRTC.

Allow the driver to perform a scale operation to fit the content, so
systems with scaling blocks in the writeback path can easily expose them.
A partially filled buffer should never be returned, so failure remains
an option for all the systems that don't have a scaler, or when scaler
limits are exceeded.

Cropping would make less sense, as the region to crop is underspecified
without some other properties to define an origin.

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
Link: https://patch.msgid.link/20260602191754.79047-1-derek.foreman@collabora.com
Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
2026-06-15 22:28:26 +01:00
..
adp
Merge tag 'drm-misc-next-2026-05-07' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
2026-05-08 14:16:04 +10:00
amd
drm/amdgpu: Implement "color format" DRM property
2026-06-09 21:03:51 +01:00
arm
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
armada
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
aspeed
…
ast
Merge tag 'drm-misc-next-2026-04-20' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
2026-05-06 10:12:25 +10:00
atmel-hlcdc
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
bridge
drm/bridge: dw-hdmi-qp: Use common HDMI output bus fmts helper
2026-06-09 21:03:51 +01:00
ci
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
clients
drm/client: log: Look up glyph shape with font helper
2026-06-04 09:44:09 +02:00
display
drm/display: hdmi-state-helper: Try subsampling in mode_valid
2026-06-09 21:03:51 +01:00
etnaviv
Merge v7.1-rc5 into drm-next
2026-05-28 09:58:36 +02:00
exynos
Merge v7.1-rc5 into drm-next
2026-05-28 09:58:36 +02:00
fsl-dcu
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
gma500
Merge v7.1-rc5 into drm-next
2026-05-28 09:58:36 +02:00
gud
drm/gud: Add RCade Display Adapter VID/PID pair
2026-05-12 08:35:00 +02:00
hisilicon
drm/hisilicon/kirin: switch to of_drm_get_bridge_by_endpoint()
2026-05-19 10:57:25 +02:00
hyperv
drm/hyperv: Use "hv_drm_" as symbol name prefix
2026-05-29 07:08:30 -04:00
i915
drm/atomic-state-helper: Rename __drm_atomic_helper_crtc_state_reset()
2026-05-29 11:41:53 +02:00
imagination
drm: Remove DRIVER_GEM_GPUVA feature flag
2026-05-29 19:03:10 +02:00
imx
Merge tag 'drm-misc-next-2026-05-07' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
2026-05-08 14:16:04 +10:00
ingenic
Merge tag 'drm-misc-next-2026-05-07' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
2026-05-08 14:16:04 +10:00
kmb
Merge tag 'drm-misc-next-2026-05-07' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
2026-05-08 14:16:04 +10:00
lima
drm/lima: Remove drm_sched_init_args->num_rqs usage
2026-04-17 14:43:29 +02:00
logicvc
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
loongson
Merge v7.1-rc5 into drm-next
2026-05-28 09:58:36 +02:00
mcde
drm/mcde: dsi: convert to of_drm_find_and_get_bridge()
2026-02-23 10:10:34 +01:00
mediatek
Merge v7.1-rc5 into drm-next
2026-05-28 09:58:36 +02:00
meson
Merge tag 'drm-misc-next-2026-05-07' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
2026-05-08 14:16:04 +10:00
mgag200
Merge tag 'drm-misc-next-2026-05-07' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
2026-05-08 14:16:04 +10:00
msm
drm/msm/dsi: support DSC configurations with slice_per_pkt > 1
2026-06-07 02:31:01 +03:00
mxsfb
drm: lcdif: Wait for vblank before disabling DMA
2026-05-29 17:18:10 +02:00
nouveau
drm: Remove DRIVER_GEM_GPUVA feature flag
2026-05-29 19:03:10 +02:00
nova
rust: gem: Introduce DriverObject::Args
2026-03-26 02:08:04 +01:00
omapdrm
Merge tag 'drm-misc-next-2026-05-07' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
2026-05-08 14:16:04 +10:00
panel
drm/panel-edp: Add BOE NV116WH2-M30, BOE NT116WHM-N21, BOE NV116FH1-M31, BOE NV116FH1-M30
2026-06-08 10:10:09 -07:00
panfrost
Merge v7.1-rc5 into drm-next
2026-05-28 09:58:36 +02:00
panthor
drm/panthor: Bump the driver version to 1.9
2026-06-05 10:59:08 +01:00
pl111
BackMerge tag 'v6.19-rc7' into drm-next
2026-01-28 12:44:28 +10:00
qxl
Merge v7.1-rc5 into drm-next
2026-05-28 09:58:36 +02:00
radeon
drm/radeon/evergreen_cs: Add missing NULL prefix check in surface check
2026-05-19 12:16:16 -04:00
renesas
drm/rcar-du: Drop superfluous spaces after assignments
2026-06-11 14:56:01 +03:00
rockchip
drm/rockchip: dw_hdmi_qp: Set supported_formats platdata
2026-06-09 21:03:51 +01:00
scheduler
drm/sched: Remove redundant entity->rq initialization and checks
2026-06-10 08:18:49 +02:00
sitronix
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
solomon
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
sprd
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
sti
Merge v7.1-rc5 into drm-next
2026-05-28 09:58:36 +02:00
stm
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
sun4i
drm/hdmi: Rename __drm_atomic_helper_connector_hdmi_reset()
2026-05-29 11:41:54 +02:00
sysfb
Merge tag 'drm-misc-next-2026-05-07' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
2026-05-08 14:16:04 +10:00
tegra
drm/tegra: dsi: Re-add clear enable register if DSI was powered by bootloader
2026-05-29 14:29:19 +02:00
tests
drm/tests: Move test EDID data to separate .c file
2026-06-15 12:49:13 +03:00
tidss
drm/tidss: Convert to atomic_create_state
2026-05-29 11:42:46 +02:00
tilcdc
Merge tag 'drm-misc-next-2026-05-07' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
2026-05-08 14:16:04 +10:00
tiny
drm/gm12u320: Replace system_long_wq with system_dfl_long_wq
2026-05-29 09:11:26 +02:00
ttm
drm/ttm: Issue direct reclaim at beneficial_order
2026-06-13 17:30:33 -07:00
tve200
drm/tve200: Fix probe cleanup after register failure
2026-05-05 11:16:39 +02:00
tyr
Merge tag 'drm-next-2026-04-15' of https://gitlab.freedesktop.org/drm/kernel
2026-04-15 08:45:00 -07:00
udl
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
v3d
drm/v3d: Deprecate V3D 3.3 and 4.1 support
2026-06-09 15:03:21 -03:00
vboxvideo
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
vc4
drm/hdmi: Rename __drm_atomic_helper_connector_hdmi_reset()
2026-05-29 11:41:54 +02:00
verisilicon
drm: verisilicon: fix build failure of cursor plane code
2026-05-26 16:05:53 +08:00
vgem
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
virtio
drm/virtio: abort virtqueue wait on device removal to avoid hung task
2026-06-03 04:19:10 +03:00
vkms
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
vmwgfx
Merge tag 'drm-misc-next-2026-05-07' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
2026-05-08 14:16:04 +10:00
xe
drm: Remove DRIVER_GEM_GPUVA feature flag
2026-05-29 19:03:10 +02:00
xen
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
xlnx
drm: zynqmp_dp: switch to of_drm_get_bridge_by_endpoint()
2026-05-19 10:57:26 +02:00
drm_atomic_helper.c
drm/atomic-helper: Add HDMI bridge output bus formats helper
2026-06-09 21:03:50 +01:00
drm_atomic_state_helper.c
drm/connector: Add new atomic_create_state callback
2026-05-29 11:42:34 +02:00
drm_atomic_uapi.c
drm: Add new general DRM property "color format"
2026-06-09 21:03:50 +01:00
drm_atomic.c
drm/mode-config: Create drm_mode_config_create_initial_state()
2026-05-29 11:42:45 +02:00
drm_auth.c
drm/auth: Only drm_drop_master if it exists
2026-04-21 22:05:51 +08:00
drm_blend.c
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_bridge_helper.c
…
drm_bridge.c
drm/bridge: Document bridge chain format selection
2026-06-09 21:03:51 +01:00
drm_buddy.c
gpu/buddy: Track per-order used blocks with a scoreboard
2026-05-29 13:44:01 +02:00
drm_cache.c
…
drm_client_event.c
…
drm_client_modeset.c
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_client_sysrq.c
…
drm_client.c
drm/client: Export drm_client_buffer_create()
2026-03-03 09:28:31 +01:00
drm_color_mgmt.c
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_colorop.c
drm/colorop: Create drm_atomic_helper_colorop_create_state()
2026-05-29 11:41:50 +02:00
drm_connector.c
drm/connector: Update docs of "colorspace" for color format prop
2026-06-09 21:03:51 +01:00
drm_crtc_helper_internal.h
…
drm_crtc_helper.c
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_crtc_internal.h
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_crtc.c
drm/simple-kms: Deprecate simple-kms helpers
2026-03-25 15:05:22 +01:00
drm_damage_helper.c
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_debugfs_crc.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
drm_debugfs.c
…
drm_displayid_internal.h
…
drm_displayid.c
…
drm_draw_internal.h
drm/draw: Remove unused helper drm_draw_get_char_bitmap()
2026-06-04 09:44:11 +02:00
drm_draw.c
…
drm_drv.c
drm/drv: Switch skeleton to drm_mode_config_create_initial_state()
2026-05-29 11:42:46 +02:00
drm_dumb_buffers.c
drm: Remove unused header in drm_dumb_buffers.c
2026-05-29 09:09:37 +02:00
drm_edid_load.c
…
drm_edid.c
Revert "drm/edid: add CTA Video Format Data Block support"
2026-05-06 11:22:15 +02:00
drm_eld.c
…
drm_encoder.c
drm/encoder: drm_encoder_cleanup: lock the encoder chain mutex during removal
2026-04-16 09:08:42 +02:00
drm_exec.c
drm/exec, drm/xe: Avoid abusing the drm_exec retry pointer
2026-05-25 10:45:38 +02:00
drm_fb_dma_helper.c
…
drm_fb_helper.c
Merge v7.1-rc5 into drm-next
2026-05-28 09:58:36 +02:00
drm_fbdev_dma.c
…
drm_fbdev_shmem.c
…
drm_fbdev_ttm.c
…
drm_file.c
Revert "drm: Fix use-after-free on framebuffers and property blobs when calling drm_dev_unplug"
2026-03-26 14:09:26 +01:00
drm_flip_work.c
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
2026-02-21 01:02:28 -08:00
drm_format_helper.c
…
drm_format_internal.h
…
drm_fourcc.c
drm/fourcc: Add DRM_FORMAT_XVUY2101010
2026-05-05 14:04:29 +03:00
drm_framebuffer.c
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_gem_atomic_helper.c
drm/simple-kms: Deprecate simple-kms helpers
2026-03-25 15:05:22 +01:00
drm_gem_dma_helper.c
drm/gem-dma: set VM_DONTDUMP for mmap
2026-03-26 14:35:18 +08:00
drm_gem_framebuffer_helper.c
drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()
2026-04-27 11:27:22 +02:00
drm_gem_shmem_helper.c
drm/shmem_helper: Make sure PMD entries get the writeable upgrade
2026-04-03 10:11:04 +02:00
drm_gem_ttm_helper.c
…
drm_gem_vram_helper.c
drm/vram: remove DRM_VRAM_MM_FILE_OPERATIONS from docs
2026-04-09 09:34:28 +02:00
drm_gem.c
drm: Remove DRIVER_GEM_GPUVA feature flag
2026-05-29 19:03:10 +02:00
drm_gpusvm.c
drm: Drop HPAGE_PMD_SIZE dependency in dma_iova_try_alloc calls
2026-05-07 14:07:36 -04:00
drm_gpuvm.c
drm/exec: Remove the index parameter from drm_exec_for_each_locked_obj[_reverse]
2026-05-25 10:45:38 +02:00
drm_internal.h
…
drm_ioc32.c
drm/ioc32: stop speculation on the drm_compat_ioctl path
2026-04-02 08:24:55 +02:00
drm_ioctl.c
…
drm_kms_helper_common.c
…
drm_lease.c
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
drm_managed.c
…
drm_mipi_dbi.c
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_mipi_dsi.c
drm/mipi-dsi: add mipi_dsi_shutdown_peripheral_multi
2026-04-24 10:12:16 -07:00
drm_mm.c
…
drm_mode_config.c
drm/mode-config: Create drm_mode_config_create_initial_state()
2026-05-29 11:42:45 +02:00
drm_mode_object.c
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_modes.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
drm_modeset_helper.c
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_modeset_lock.c
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
2026-02-21 01:02:28 -08:00
drm_of.c
drm: of: forbid bridge-only calls to drm_of_find_panel_or_bridge()
2026-05-19 10:57:26 +02:00
drm_pagemap_util.c
drm/pagemap_util: Ensure proper cache lock management on free
2026-03-17 15:39:07 +01:00
drm_pagemap.c
drm: Drop HPAGE_PMD_SIZE dependency in dma_iova_try_alloc calls
2026-05-07 14:07:36 -04:00
drm_panel_backlight_quirks.c
…
drm_panel_orientation_quirks.c
…
drm_panel.c
drm/panel: fix kernel-doc warning for devm_drm_panel_add()
2026-05-26 16:00:32 +02:00
drm_panic_qr.rs
…
drm_panic.c
drm/panic: Look up glyph shape with font helper
2026-06-04 09:44:10 +02:00
drm_pci.c
…
drm_plane_helper.c
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
drm_plane.c
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
drm_prime.c
drm/prime: Limit scatter list size with dedicated DMA device
2026-03-23 13:23:29 +08:00
drm_print.c
drm/print: describe 6th & 9th bit of drm.debug
2026-06-03 11:24:52 +02:00
drm_privacy_screen_x86.c
…
drm_privacy_screen.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
drm_probe_helper.c
drm/probe-helper: replace use of system_wq with system_percpu_wq
2026-02-09 09:41:09 +01:00
drm_property.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
drm_ras_genl_family.c
drm/ras: Introduce the DRM RAS infrastructure over generic netlink
2026-03-05 19:38:55 -05:00
drm_ras_nl.c
drm/drm_ras: Add clear-error-counter netlink command to drm_ras
2026-04-24 08:43:42 -04:00
drm_ras_nl.h
drm/drm_ras: Add clear-error-counter netlink command to drm_ras
2026-04-24 08:43:42 -04:00
drm_ras.c
drm/drm_ras: Add clear-error-counter netlink command to drm_ras
2026-04-24 08:43:42 -04:00
drm_rect.c
…
drm_self_refresh_helper.c
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_simple_kms_helper.c
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_suballoc.c
Merge tag 'drm-xe-next-2026-03-02' of https://gitlab.freedesktop.org/drm/xe/kernel into drm-next
2026-03-03 10:37:29 +10:00
drm_syncobj.c
drm/syncobj: Fix memory leak in drm_syncobj_find_fence()
2026-05-18 11:19:59 +01:00
drm_sysfs.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
drm_trace_points.c
…
drm_trace.h
…
drm_vblank_helper.c
drm: Rename struct drm_atomic_state to drm_atomic_commit
2026-05-04 14:05:04 +10:00
drm_vblank_work.c
…
drm_vblank.c
drm/vblank: Extract get_vblank_counter_and_timestamp()
2026-03-27 13:40:44 +02:00
drm_vma_manager.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
drm_writeback.c
drm: writeback: Document behaviour for framebuffer size mismatch
2026-06-15 22:28:26 +01:00
Kconfig
Merge tag 'drm-rust-next-2026-03-30' of https://gitlab.freedesktop.org/drm/rust/kernel into drm-next
2026-04-01 07:32:05 +10:00
Kconfig.debug
drm: fix dead default for DRM_TTM_KUNIT_TEST
2026-03-24 16:19:04 +01:00
Makefile
Merge drm/drm-next into drm-xe-next
2026-03-12 07:23:23 -07:00