Changes in amdgpu_dm_backlight.c

654ae5d73c05bd2943d65636ce6cd0aa46e62f18 - Merge tag 'drm-fixes-2026-09-05' of https://gitlab.freedesktop.org/drm/kernel

Fri, 04 Sep 2026 22:42:16 +0200

Merge tag 'drm-fixes-2026-09-05' of https://gitlab.freedesktop.org/drm/kernelPull drm fixes from Dave Airlie: "Lots of scattered fixes: nouveau has a bunch of display fixes for blackwell GPUs that should mean we light up monitors properly and fix some desktop rendering problems, amdgpu and intel display changes as usual. There also changes to the core pagemap, then the usual amouny of AI inspired validation fixes. core: - Fix drm_crtc_commit leak when PAGE_FLIP_EVENT is used dma-buf: - Publish the dma-buf only after copy_to_user succeeds - fix some kernel-doc warnings atomic-state-helpers: - set pixel_blend_mode to prop default on reset sysfb: - Fix integer overflow - fix constant comparison bug pagemap: - Prevent double migration of device pages - Reset migration page count on eviction retry - dma-unmap pages before handling migration errors - use after free fixes prime: - fix prime exports tracing amdgpu: - Fix for drm_amdgpu_info_device with mixed 64 bit kernel and 32 bit userspace - plane blend mode fixes - SR-IOV fix - GFX8 fix - MES queue reset fix - GPUVM fixes - DCN 6 warning fix - DCN 3.5/3.6 fix - DML fix - Backlight fix - Colorop fix - DC get_estimated_bw() fix - devcoredump fix - Userq fixes - APU PSP fix - Cursor fix amdkfd: - MES queue eviction fix - MQD debugfs fix xe: - oa uapi error handling fix - drm info message to report FLAT_CSS base misalignment i915: - Drop an accidentally duplicated panel fitter call in DP MST - Fix DDI clock programming for Cx0 and LT PHY - Fix PTL CDCLK handling at probe, causing a glitch - Fix dg2_power_well_count() return type - Fix a NULL pointer deref at forced probe - Fix selective fetch disable amdxdna: - out-of-bounds access fix - reject commands chains with no commands - handle chained mapping BO failures - refuse to flush an imported BO ethosu: - handle mmio mapping failures - handle storage modes only on hardware that supports it - fix job completion fence cleanup fastrpc: - Publish the dma-buf only after copy_to_user succeeds gud: - Improve TV modes and rotation handling nouveau: - use-after-free fixes - add missing scanline position support - HDMI and DP fixes - null pointer dereference fix - dmem accounting fixes for large folios - use write-combined maps for coherent qaic: - out-of-bounds access fix tegra: - Add blend mode properties virtio: - exit path and error handling fixes* tag 'drm-fixes-2026-09-05' of https://gitlab.freedesktop.org/drm/kernel: (83 commits) drm/xe/vram: report FLAT_CCS base misalignment MAINTAINERS, mailmap: use Aditya Garg's linux.dev account drm/amd/display: use plane color_mgmt_changed to track colorop changes drm/amdgpu/userq: fix struct drm_amdgpu_info_device padding for 32bit compile drm/amd/display: Fix cursor disable with horizontally split planes drm/amdgpu/userq: dont overwrite the error of subsequent map call drm/amdgpu: Skip accessing psp rum time db for APUs drm/amdgpu: update the fw version for gfx12 userqueues drm/amdgpu: update the fw version for gfx11 userqueues drm/amdgpu: fix byte/dword unit mismatch in coredump IB dump drm/amdkfd: fix scope of mqd_mgr dereference in pqm_debugfs_mqds drm/amd/display: fix division by zero in get_estimated_bw() drm/amd/display: use halving distribution for all encode-to-linear curves drm/amd/display: Fix backlight control for luminance-capable OLED drm/amd/display: Remove const Qualifier From Non-Pointer Fields drm/amd/display: Set gpuvm min page size to 4K on dcn35/36 drm/amd/display: Fix DCN5/6 DML2 compilation warnings drm/amdgpu: fix Idle BOs list in VM debugfs status info drm/amdgpu: use AMDGPU_GPU_PAGE_SHIFT instead of PAGE_SHIFT drm/amdgpu: Update queue reset support version ... List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

7f78fe856eb64723c436c636a1479c27608aaced - Merge tag 'amd-drm-fixes-7.3-2026-09-03' of https://gitlab.freedesktop.org/drm/amdgpu/kernel into drm-fixes

Fri, 04 Sep 2026 09:04:53 +0200

Merge tag 'amd-drm-fixes-7.3-2026-09-03' of https://gitlab.freedesktop.org/drm/amdgpu/kernel into drm-fixesamd-drm-fixes-7.3-2026-09-03:amdgpu:- SR-IOV fix- GFX8 fix- MES queue reset fix- GPUVM fixes- DCN 6 warning fix- DCN 3.5/3.6 fix- DML fix- Backlight fix- Colorop fix- DC get_estimated_bw() fix- devcoredump fix- Userq fixes- APU PSP fix- Cursor fixamdkfd:- MES queue eviction fix- MQD debugfs fixUAPI:- Fix for drm_amdgpu_info_device with mixed 64 bit kernel and 32 bit userspaceSigned-off-by: Dave Airlie From: Alex Deucher Link: https://patch.msgid.link/20260903174712.584320-1-alexander.deucher@amd.com List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

5a67d2e055897a36acb4e48082986fb4a4eebdd3 - drm/amd/display: Fix backlight control for luminance-capable OLED

Fri, 21 Aug 2026 18:19:10 +0200

drm/amd/display: Fix backlight control for luminance-capable OLED[WHY]For some eDP panels VESA aux backlight control is necessary,otherwise they stay black.[HOW]When AUX backlight control is used, select BACKLIGHT_CONTROL_VESA_AUX forpanels that advertise panel_luminance_control.Reviewed-by: Hansen Dsouza Signed-off-by: Roman Li Signed-off-by: Alex Hung Tested-by: Dan Wheeler Signed-off-by: Alex Deucher (cherry picked from commit 42f698bd061d76d5f4c84a195e465cfbeec775e4) List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

67f8bc848ee31831336bd478e57d2f993551902e - Merge drm/drm-fixes into drm-misc-fixes

Tue, 01 Sep 2026 09:38:51 +0200

Merge drm/drm-fixes into drm-misc-fixesLet's start the 7.3 drm-misc-fixes cycle.Signed-off-by: Maxime Ripard List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

a99d741df7372f2175677673d78a6335f3e0706f - Merge tag 'drm-next-2026-08-29' of https://gitlab.freedesktop.org/drm/kernel

Sat, 29 Aug 2026 01:37:55 +0200

Merge tag 'drm-next-2026-08-29' of https://gitlab.freedesktop.org/drm/kernelPull more drm updates from Dave Airlie: "As mentioned last week, an msm pull request fell down the side of the couch or whatever the email equivalent of that is. This has the msm next stuff + the usual fixes for amd/intel. core: - use drm_warn instead of warn msm: - Bindings: - Added Shikra support - Document a840, a704, a722 - Core: - Use drm_client buffers for fbdev emulation - teardown fixes - ARM32 DMA fixup - Remove objects from evict list when re-validated - Bunch of corner case and error path fixes - DPU: - Dropped dev_pm_opp_set_rate(0) preventing burnout - Fixed SSPP offsets of Kaanapali - DP: - Dropped dev_pm_opp_set_rate(0) preventing burnout - Cleaned up core code in preparation for MST support - Fixed prepare() to let Pipewire continue in case of the unplugged cable - GPU: - Add support for a704 - Add support for a722 - HDMI: - Simplifed register access amdgpu: - eGPU fixes - Runtime PM fix - UserQ fixes - Backlight fix - Discovery sysfs fix - Reset handling fixes - Buffer func handling fix for xgmi - VCN boundary check fix - DC lut handling fixes - MES fixes - UVD fix - VCE 3 fix - Enforce isolation fix - HPD fix for VGA/LVDS - DML fix - DCN 6 fixes - DC gpu reset fix amdkfd: - Fix return value - CU occupancy for GFX 11 - CU occupancy for GFX 12/12.1 - Queue bounds checking fix - SVM fixes - CRIU bounds checking fix radeon: - iMac display fix xe: - error message cleanups - i2c global register definitions as dependency for xe/i2c fixes - Media workardound - Add CCS to gt_idle debugfs print - Page fault related fix - i2c related fixes - System Controller mailbox bit fix"* tag 'drm-next-2026-08-29' of https://gitlab.freedesktop.org/drm/kernel: (121 commits) drm/xe/sysctrl: Read mailbox phase bit from hardware drm/xe/i2c: Keep the i2c controller always enabled drm/xe/i2c: Fix the interrupt handling i2c: designware: Global register definitions drm/xe: Reject page faults from non-fault-mode scratch VMs drm/xe/xe_gt_idle: Add CCS to the powergating info print drm/xe: Do not apply WA 14025883347 to media 3503 drm/amd/display: fix dc_lock leak on GPU reset error paths drm/amd/display: Fix redundant GPUVMEnable checks in dcn6 flip schedule drm/amd/display: Fix wrong bytes-per-pixel value for dml2_422_packed_10 drm/amdkfd: guard against NULL restore_mqd in CRIU queue restore drm/amdgpu/userq: fix lock missing for userq fence error set drm/amdkfd: Fix the case that vm range is hole at svm_migrate_copy_to_vram drm/amdkfd: Fix error path at svm_migrate_copy_to_ram drm/amd/display: Log details when failing to register HPD IRQ drm/amd/display: Fix HPD consideration for VGA/LVDS connectors on DCE drm/amdgpu: clamp the isolation index for rings outside a partition drm/amdkfd: Reject zero-sized AQL queue allocations after size halving drm/amdgpu: Fix VCE 3 ring align_mask drm/kfd: Add CU occupancy support to GFX12.1 ... List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

22e48eeaf4851a3caf2acb397069283508a7f5f5 - Merge tag 'amd-drm-next-7.3-2026-08-19' of https://gitlab.freedesktop.org/agd5f/linux into drm-next

Mon, 24 Aug 2026 01:07:41 +0200

Merge tag 'amd-drm-next-7.3-2026-08-19' of https://gitlab.freedesktop.org/agd5f/linux into drm-nextamd-drm-next-7.3-2026-08-19:amdgpu:- eGPU fixes- Runtime PM fix- UserQ fixes- Backlight fix- Discovery sysfs fix- Reset handling fixes- Buffer func handling fix for xgmi- VCN boundary check fix- DC lut handling fixesamdkfd:- Fix return valueradeon:- iMac display fixSigned-off-by: Dave Airlie From: Alex Deucher Link: https://patch.msgid.link/20260819183622.2406038-1-alexander.deucher@amd.com List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

6fd83a1c2cdea48c396f600795217fbdfb8124f6 - drm/amd/display: Scale custom brightness curve from full range

Thu, 13 Aug 2026 19:09:59 +0200

drm/amd/display: Scale custom brightness curve from full rangeCustom brightness curves use an 8-bit input signal. After exporting thefull PWM range to userspace, the curve normalizer still divides requestsby the physical PWM span. On panels with a nonzero minimum PWM level,this can produce a curve input greater than 255 and send an invalidbacklight level to DC.Scale the userspace [0..max] range to the curve's [0..255] rangeinstead. This retains the full advertised range and keeps the reversereadback conversion unchanged.Fixes: 8dbd72cb7900 ("drm/amd/display: Export full brightness range to userspace")Cc: stable@vger.kernel.orgSigned-off-by: Akhmed Zhitaev Reviewed-by: Mario Limonciello (AMD) (Move to amdgpu_dm_backlight.c)Link: https://patch.msgid.link/20260813170959.22073-1-zhitaevakh@gmail.comSigned-off-by: Mario Limonciello Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

b2128290c29902315e632ea59e0504d6bc9e9b42 - Merge remote-tracking branch 'drm/drm-next' into msm-next-backmerge

Sat, 18 Jul 2026 17:06:55 +0200

Merge remote-tracking branch 'drm/drm-next' into msm-next-backmergeBackmerge of drm-next, mainly to pick up dt bindings docs updates toavoid conflicts.Signed-off-by: Rob Clark List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

4e69c1856bfd9ffb7e9d335a25842fa211628929 - Merge tag 'drm-next-2026-08-20' of https://gitlab.freedesktop.org/drm/kernel

Fri, 21 Aug 2026 17:41:00 +0200

Merge tag 'drm-next-2026-08-20' of https://gitlab.freedesktop.org/drm/kernelPull drm updates from Dave Airlie: "Highlights: - dmemcg eviction support is good for low VRAM things like Steam Machine - AMD adds gfx6-8 modifier support for older GPUs that enables a bunch of wayland stuff - i915/xe has some new hw support but also a lot of display refactoring Everything: perf: - export perf_allow_ APIs for xe udmabuf: - remove default size limit of 64MB rust: - i/o rework (signed tag from driver-core tree) - add registration guard and registration data - fix unbounded lifetimes in ioctl handler args - fix a drm_dev_register race - gem_shmem: add DmaResvGuard helper - gpuvm: require send/sync for driver data - implement send/sync for GpuVaAlloc and GpuVmBo - add SmContext lifetime - rename dma_handle to dma_address - change pci_sriov_get_totalvfs return to unsigned int core: - create drm_of_get_panel_orientation - send per-connector hotplug events - add thunderbolt UBHR tunneling support connector: - add color format property dmem: - introduce a peak file - accept one region per limit - add dmemcg support for eviction gpusvm: - reorg code to give drivers more flexibility atomic: - add create_state callback and helper - add documentation on atomic commit lifetime buddy: - add per-order free - add used block scoreboard - fix UAF - test buffer clearance on resume - add phys_addr->block helper gem: - drop DRIVER_GEM_GPUVA flag ttm: - be more aggressive allocating below protection limit sched: - add test suite for concurrent job submissions hdmi: - hook the color format property in helpers mipi-dsi: - add MIPI_DSI_MODE_DSC_ALL_SLICES_IN_PKT bridge: - add atomic create callbacks - drop atomic reset - display-connector: don't autoenable HPD IRQ - trigger initial HPD for DP - ti-sn65dsi83: remove NO_HFP and NO_HBP mode flags - analogix_dp: switch to DP link training helpers dp: - add support for DSC max delta BPP edid: - parse panel type from DisplayID 2.x Display Parameters sysfb: - improve panel, stride, framebuffer size validation panel: - implement ref counting for struct drm_panel - himax-hx83121a: add backlight regulator support - novatek-nt36672a: Inline panel init sequences - visionox-vtdr6130: enable DSC - novatek-nt37801: Use mipi_dsi_*_multi() functions - samsung-s6d16d0: Fix prepare error handling - support Novatek NT36536 plus DT bindings - sofef00: fix backlight updates - osd101t2587: use mipi_dsi_*_multi interface - panel-edp: adjust timing for AUO displays - panel-lvds: support Opto Logic SCX1001511GGC49 - panel-simple: support Kyocera tcg070wvlq - panel-edp: quirks - AUO B116XAT04.3, CMN N116BCP-EA2, CSW MNB601LS1-8 - BOE NV116WH2-M30, BOE NT116WHM-N21, BOE NV116FH1-M31 - BOE NV116FH1-M30, NV140FHM-N5B, TM156VDXP25 - BOE NE160QDM-NY1, MB116AS01 - new: - Samsung ATNA40HQ08-0, Anbernic TD4310 - Chipone ICNA35XX, Ilitek ILI9488 - Ilitek ILI7807S, Renesas R63419 - MNE001BS6-2, MNF601BS4-1, Sharp LQ120P1JX51 virtio: - add support for save/restore virtio_gpu_objects - abort vq wait on device removal amdgpu: - add color format DRM property - initial compute pipe reset support - add GFX 6-8 modifier support - initial DCN 6.0.0 support - dmemcg eviction support - improved boundary checking for bios parsing - RAS updates and rework - VCN secure submission fixes - 8K panel fix - Display KUNIT tests - parse panel type from DisplayID - Align IP discovery to pci device lifetime - SOC15 register macro cleanups - UVD memory placement fixes - GFX9 mode2 reset fixes - drop unnecessary BUG/BUG_ON - GFX8 soft reset rework - enable soft reset on GFX8 - PSP/SMU 15.0.9 update - VI ASPM fix - userq fixes - amdgpu_vm_get_task_info_pasid lifetime fix - DC CACP support - change system_unbound_wq with system_dfl_wq - Loosen VFCT bios parsing to deal with pci=realloc - SI/SMU7 AC/DC switch fix - VM fence handling fix - GEM close optimisation - Apple Studio Display fixes - DC FRL fixes amdkfd: - initial compute pipe reset support - allow applications to opt out of sigbus on fatal errors - improve CRIU boundary checks - MQD handling rework - move TBA/TMA from system to device memory - avoid topology-lock in kfd_mmap - SVM eviction fixes radeon: - fix unset CONFIG_ACPI build i915: - Novalake (NVL display version 35) timing generator enabling - NVL DC3CO enabling - enable UBHR link rates on thunderbolt tunnels - Reduce Xe3+ PM demand peak bandwidth - enable pipe DMC error interrupts for display 30+ - add kunit tests for DP link config selection - refactor and document DP link recovery - i915/xe driver display probe/remove/suspend/resume/shutdown cleanup and unification - i915/xe display runtime PM unified - Break i915 and xe panic dependency on struct intel_framebuffer - Streamline Pre/Post-CSC LUT loops - drop TGL DC3DO support - CDCLK santization - fix HDMI scrambling enable - fix phys bo pread/pwrite with offset - add missing nospec on parallel submit slot - fix some NULL derefs xe: - drop force_execlist module param - gate observation streams with perf_allow_cpu - skip FORCE_WC and vm_bound check for external dma-bufs - dmemcg eviction support - remove unused NVL-S GuC - TLB invalidation improvements - NVL-S updated PCI-IDs and w/a - madvise: optimise invalidation path - fix infinite gt-reset loop in timeout recovery - update TTM device benefical_order - wait on external BO kernel fences in exec ioctl - add/use more KLV helpers - sriov: disable display in admin only PF mode - add RAS GPU health indicator - optimise TTM populate for DONTNEED BO - drop force_probe for NVL-s - add debugfs for pcode info amdxdna: - disable device buffer export nova: - build nova-core/nova-drm from drivers/gpu - export nova-core rust symbols (workaround) - GSP boot process consolidation - Boot GSP with vGPU enabled - TLV firmware image format support - Hopper/Blackwell fixes and cleanups - I/O projection adoption tyr: - firmware loading and MCU boot - add generic slot manager + MMU - GPU VM support ARM64 LPAE page tables - add kernel buffer object for internal allocations - add parser for Mali CSF - add MCU booting nouveau: - race fixes - check instmem iomapping at first use - add dmemcg support - expose NVDEC channels - add scanline position/head state support for GSP qxl: - convert simple encoder to regular ethosu: - add perf counter support etnaviv: - force flush on power register ops msm: - support DSC configuration with slice_per_pkt > 1 mxsfb: - fix disable sequence panthor: - support sparse mappings rockchip: - switch away from simple helpers - support YUV background color - fix layer config timeout - add edp support for rk3576 - add batch command submission function rocket: - error handling and NULL ptr deref fixes sun4i: - switch away from simple helpers imagination: - mark BXM-4-64 MC1 as support host1x: - support tegra264 tegra: - add DSI for tegra 20/30 v3d: - reduce PM runtime autosuspend delay - scheduler fixes and refactoring - deprecate v3d 3.3 and 4.1 - validate CPU job query boundaries hibmc: - improve plane format handling - switch to gem shmem mediatek: - cec: correct compat for mt7623-8167? exynos: - remove simple dependency - add error handling to encoder paths - take i2c adapter module reference"* tag 'drm-next-2026-08-20' of https://gitlab.freedesktop.org/drm/kernel: (2074 commits) drm/xe/mcr: Take vcs1/vecs1 into account for first media slice drm/xe: Fix a bug in pc_adjust_freq_bounds() drm/xe: Fix xe_device_probe() failure drm/xe/drm_ras: Move has_drm_ras check to drm_ras layer drm/xe/ras: Fix boot-time ras error processing drm/amd/display: make DC_RUN_WITH_PREEMPTION_ENABLED misuse a build error drm/amd/pm: silence uninitialized variable warnings drm/amdgpu: skip BOs being torn down during GTT recovery drm/amdgpu: Reject UVD message with invalid number of h265 refs drm/amdgpu: keep PRT mappings off the vm_bo state lists drm/amdgpu: fix nbif 6.3.1 l1 low power not functional drm/amd/display: fix BT.2020 YCbCr output CSC matrices for DCE drm/amd/display: fix BT.2020 YCbCr limited output CSC matrix drm/amdgpu: Implement insert_end for VCE 3 drm/amdgpu: Fix UVD min buffer sizes drm/amdgpu: Fix UVD decode image min size calculation drm/amdgpu: Fix UVD dpb min size calculation for H264 drm/amdgpu: Reject UVD message with dimensions above 4096 drm/amdgpu: check ASPM on the dGPU host link drm/radeon: fix autosuspend cleanup during teardown ... List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

22afd697fbbc000460d09282282b342feb7331c2 - Merge tag 'amd-drm-next-7.3-2026-07-29' of https://gitlab.freedesktop.org/agd5f/linux into drm-next

Fri, 31 Jul 2026 07:44:43 +0200

Merge tag 'amd-drm-next-7.3-2026-07-29' of https://gitlab.freedesktop.org/agd5f/linux into drm-nextamd-drm-next-7.3-2026-07-29:amdgpu:- VCN 5.3 fix- UserQ fixes- GEM close optimization- HDMI AV mute fix- UML build fixes- GFXOFF residency metrics fixes- SMU 15 fixes- debug_vm fix- PSP 15 fixes- NBIO 7.11.5 fix- pptable use after free fix- gpu metrics fetch fix- DC viewport fix- DML2.1 fix- i2c retimer spam fix- UMD profile pstate fix- Power metrics format cleanup- GTT size fix on APUs- DC context logging fix- Misc fixes- IB pool clean up and fixes- DCN 4.2 updates- Old BUG() and BUG_ON() removal- RAS updates- PASID management updates- DC MCIF ARB updates- More DC KUNIT tests- Refactor dc_validation_set- Introduce dc_state_get_status unified status accessor- Apple Studio Display fixes- DML updates- DC writeback fixes- MES updates- PTL updates- DC code restructuring- DC FRL fixes- Add modifiers for GFX6-8- Resume fix for MacBookPro15,1amdkfd:- Various bounds checking fixes- Mutex locking fix- Clean up debug runlist printing- SR-IOV fixes- Avoid topology_lock in kfd_mmap- Fix signal reset event- SVM eviction fixesradeon:- Fix for unset CONFIG_ACPISigned-off-by: Dave Airlie From: Alex Deucher Link: https://patch.msgid.link/20260729201801.4073097-1-alexander.deucher@amd.com List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

4d6eabd9bf7cbc96968726b7197cf5189a9dfe89 - drm/amd/display: Replace amdgpu_dm_kunit_helpers.h with dm_helpers.h

Tue, 07 Jul 2026 16:21:50 +0200

drm/amd/display: Replace amdgpu_dm_kunit_helpers.h with dm_helpers.hDrop the amdgpu_dm_kunit_helpers.h include across the amdgpu_dm sourcefiles and use dm_helpers.h insteadAssisted-by: Copilot:Claude-Opus-4.8Reviewed-by: Alex Hung Signed-off-by: Bhawanpreet Lakha Signed-off-by: Wayne Lin Tested-by: Dan Wheeler Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

0755a4e3e809610a14befc9ad28d35e2e460da68 - Merge remote-tracking branch 'drm/drm-next' into drm-rust-next

Tue, 28 Jul 2026 11:38:35 +0200

Merge remote-tracking branch 'drm/drm-next' into drm-rust-nextBackmerge to pull in commit 21fcb222f0d1 ("drm: Remove DRIVER_GEM_GPUVAfeature flag"), which a Tyr patch series depends on.Signed-off-by: Danilo Krummrich List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

295a8c0b0e44760ef7e06c55beacbe0caafe1ce7 - Merge tag 'amd-drm-next-7.3-2026-07-15' of https://gitlab.freedesktop.org/agd5f/linux into drm-next

Thu, 16 Jul 2026 05:12:44 +0200

Merge tag 'amd-drm-next-7.3-2026-07-15' of https://gitlab.freedesktop.org/agd5f/linux into drm-nextamd-drm-next-7.3-2026-07-15:amdgpu:- mmhub 4.2 update- DCN4.2 updates- DC CACP support- DMUB updates- PSR fixes- Replay fixes- Change system_unbound_wq with system_dfl_wq- GC 12.1 ip dump support- DCN4 fixes- DCN4.2 updates- DSC fixes- More DC KUNIT tests- JPEG cleanups- NUTMEG fixes- 8K fix- Backlight fixes- Cursor fixes- UserQ fixes- Fix bo->pin leak in amdgpu_bo_create_reserved()- MES11 updates- Loosen VFCT bios parsing to deal with pci=realloc messing around with the PCI buses- DCN pageflip timeout fixes- devcoredump fixes- MCLK DPM fix for bonaire SKU- DCE fix for DP MST when analog encoders are present- SI AC/DC switch fix- SMU7 AC/DC switch fix- VM fence handling fix- PCIe DPM fix- SMU 13 updates- SMU 15 updates- Inline drm_simple_encoder_init()- RAS updates- HDA sound fix- Handle dependency between GPU and XHCI devicesamdkfd:- Bounds checking in CWSR size calculation- DQM init failure fixesradeon:- Loosen VFCT bios parsing to deal with pci=realloc messing around with the PCI busesSigned-off-by: Dave Airlie From: Alex Deucher Link: https://patch.msgid.link/20260715222732.2719273-1-alexander.deucher@amd.com List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

81b39f43e7e53589491e2eef6bad5389626b4b9c - drm/amd/display: Force PWM backlight on Lenovo Legion 5 15ARH05

Fri, 26 Jun 2026 16:36:00 +0200

drm/amd/display: Force PWM backlight on Lenovo Legion 5 15ARH05The Lenovo Legion 5 15ARH05 (Renoir) ships a BOE 0x08DF eDP panel thatadvertises AUX/DPCD backlight control, so amdgpu's automatic detection(amdgpu_backlight == -1) selects AUX. On this panel the AUX backlightpath has no effect: brightness writes are accepted but the panel levelnever changes, the display is stuck at a fixed brightness andmax_brightness is reported as a bogus 511000. As a result neither thedesktop brightness slider nor the brightness hotkeys do anything.Forcing PWM backlight (amdgpu.backlight=0) restores working control:max_brightness becomes 65535 and the level tracks writes. This has longbeen applied by users as a manual kernel-parameter workaround.Extend the generic panel backlight quirk with a force_pwm flag, add anentry for the Legion 5 15ARH05 / BOE 0x08DF panel, and have amdgpudisable AUX backlight (use PWM) when the quirk matches and the userlets the driver auto-select the backlight type.Signed-off-by: Alessandro Rinaldi Tested-by: Alessandro Rinaldi Reviewed-by: George Zhang Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

db546ee97153c95ea719da015cf002f970175605 - drm/amd/display: Test panel power savings sysfs

Tue, 30 Jun 2026 02:43:57 +0200

drm/amd/display: Test panel power savings sysfs[WHAT]Add KUnit coverage using a DRM-managed connector fixture.Tests cover show() mapping immediate-disable to 0 and reporting an activeABM level, and store() handling the disable mapping, the forbidden update,invalid text, and out-of-range input. show() writes through a page-backedbuffer because sysfs_emit() requires one.Assisted-by: Copilot:Claude-Opus-4.8Reviewed-by: Bhawanpreet Lakha Signed-off-by: Alex Hung Signed-off-by: George Zhang Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

0198bf2a7c707bf1a73cda80df7200f7317520f5 - drm/amd/display: Test backlight device registration

Tue, 30 Jun 2026 02:40:26 +0200

drm/amd/display: Test backlight device registration[WHAT]Add KUnit test to amdgpu_dm_register_backlight_device() andcover its bl_idx == -1 early return, which must leave thebacklight device slot untouched.Assisted-by: Copilot:Claude-Opus-4.8Reviewed-by: Bhawanpreet Lakha Signed-off-by: Alex Hung Signed-off-by: George Zhang Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

c50a4305dfc2e91681c3991af3006ccbb2ec0eb7 - drm/amd/display: Test backlight level readback path

Tue, 30 Jun 2026 02:39:36 +0200

drm/amd/display: Test backlight level readback path[WHAT]Add KUnit coverage for the backlight level read path.A faked link_service vtable returns canned PWM and AUX brightness values,letting the tests verify both the successful readback and theDC_ERROR/AUX-failure fallbacks to the cached brightness, plus theget_brightness() device-index wrapper.Assisted-by: Copilot:Claude-Opus-4.8Reviewed-by: Bhawanpreet Lakha Signed-off-by: Alex Hung Signed-off-by: George Zhang Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

ee486cb800915b2fc7ecfd108982198045860060 - drm/amd/display: Test backlight level programming path

Tue, 30 Jun 2026 02:37:52 +0200

drm/amd/display: Test backlight level programming path[WHAT]Add KUnit coverage for the backlight level write path inamdgpu_dm_backlight.c.Tests cover stream lookup hit/miss, the connector-off and no-stream earlyreturns, and the AUX/PWM/idle-reallow programming branches. The DCprogramming calls stay safe by injecting a NULL power module and keepingidle optimizations a no-op via disable_idle_power_optimizations.Assisted-by: Copilot:Claude-Opus-4.8Reviewed-by: Bhawanpreet Lakha Signed-off-by: Alex Hung Signed-off-by: George Zhang Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

bd9e2b5b0473c75abc0f4134dfe79ecbfb16610d - drm/amd/display: Fix backlight max_brightness to match exported range

Mon, 29 Jun 2026 22:27:00 +0200

drm/amd/display: Fix backlight max_brightness to match exported range[Why]FWTS autobrightness fails on eDP panels because actual_brightness canread higher than the advertised max_brightness (e.g. 63576 vs 62451).The conversion helpers expose the firmware PWM range to userspace as[0..max]. But max_brightness is advertised as (max - min), which issmaller. So reading the level can return a value above max_brightness.This regressed in commit 4b61b8a39051 ("drm/amd/display: Add debuggingmessage for brightness caps"), which changed max_brightness to(max - min) and undid commit 8dbd72cb7900 ("drm/amd/display: Export fullbrightness range to userspace").[How]Advertise max_brightness as max, and scale the initial AC/DC brightnessagainst max too. Update the KUnit expectations to match.Fixes: 4b61b8a39051 ("drm/amd/display: Add debugging message for brightness caps")Reviewed-by: Alex Hung Signed-off-by: Mario Limonciello Signed-off-by: George Zhang Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c

7b0cc308521696107828b0c6c72c5793fa279cbd - drm/amd/display: Enable CACP on Linux

Thu, 05 Mar 2026 13:11:50 +0100

drm/amd/display: Enable CACP on Linux[Why]Enable OLED panels to save more power on the Linux platform byenabling CACP support on Linux.[How]Update abm_feature_support() to return ABM_CACP_SUPPORT for OLEDpanels. Enable ABM property for all eDP panels including OLED tosupport CACP via set_abm_level.Reviewed-by: Sun peng (Leo) Li Signed-off-by: Chenyu Chen Signed-off-by: George Zhang Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_backlight.c