Antheas Kapenekakis aef10b1138 drm: panel-backlight-quirks: Add brightness mask quirk ... Certain OLED devices malfunction on specific brightness levels. Specifically, when DP_SOURCE_BACKLIGHT_LEVEL is written to with the first byte being 0x00 and sometimes 0x01, the panel forcibly turns off until the device sleeps again. Below are some examples. This was found by iterating over brighness ranges while printing DP_SOURCE_BACKLIGHT_LEVEL. It was found that the screen would malfunction on specific values, and some of them were collected. Therefore, introduce a quirk where the minor byte of brightness is OR'd with 0x03 to avoid the range of invalid values. This quirk was tested by removing the workarounds and iterating from 0 to 50_000 value ranges with a cadence of 0.2s/it. The range of the panel is 1000...400_000, so the values were slightly interpolated during testing. The custom brightness curve added on 6.15 was disabled. 86016: 10101000000000000 86272: 10101000100000000 87808: 10101011100000000 251648: 111101011100000000 251649: 111101011100000001 86144: 10101000010000000 87809: 10101011100000001 251650: 111101011100000010 Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3803 Tested-by: Philip Müller <philm@manjaro.org> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Antheas Kapenekakis <lkml@antheas.dev> Link: https://lore.kernel.org/r/20250829145541.512671-5-lkml@antheas.dev Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>		2025-09-03 10:23:01 -05:00
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amd	drm/amd/amdgpu: Add helper functions for isp buffers	2025-07-16 16:17:35 -04:00
bridge	drm/bridge: synopsys: Add DW DPTX Controller support library	2025-08-28 15:49:51 +03:00
clients	drm/client: Move public client header to clients/ subdirectory	2024-11-15 09:42:13 +01:00
display	drm-misc-next for 6.17:	2025-07-04 11:54:31 +10:00
intel	drm/xe/bmg: Add one additional PCI ID	2025-07-04 14:55:51 +01:00
ttm	drm/ttm: add new api ttm_device_prepare_hibernation()	2025-07-10 10:49:44 -05:00
amd_asic_type.h	drm/amdgpu: make amd_asic_type.h self-contained	2024-03-07 17:17:25 +02:00
drm_accel.h	drm: move drm based debugfs funcs to drm_debugfs.c	2025-07-04 15:58:22 +02:00
drm_atomic_helper.h	drm/atomic-helper: Introduce drm_atomic_helper_reset_crtc()	2025-02-13 16:17:46 +01:00
drm_atomic_state_helper.h
drm_atomic_uapi.h
drm_atomic.h	drm/atomic: Introduce helper to lookup connector by encoder	2025-03-20 14:45:46 +01:00
drm_audio_component.h
drm_auth.h
drm_blend.h
drm_bridge_connector.h
drm_bridge_helper.h	drm/bridge: Add helper to reset bridge pipeline	2025-03-20 14:45:48 +01:00
drm_bridge.h	drm/bridge: add drm_bridge_is_last()	2025-09-02 11:38:29 +02:00
drm_buddy.h	drm/amdgpu: Reset the clear flag in buddy during resume	2025-07-16 12:50:32 +02:00
drm_cache.h
drm_client_event.h	drm/client: include types.h to make drm_client_event.h self-contained	2025-02-12 10:44:43 +02:00
drm_client.h	drm/client: Send pending hotplug events after resume	2025-03-05 21:48:49 +01:00
drm_color_mgmt.h	drm/color-mgmt: Prepare for RGB332 palettes	2025-08-26 09:54:18 +02:00
drm_connector.h	drm-misc-next for 6.17:	2025-06-27 09:58:05 +10:00
drm_crtc_helper.h
drm_crtc.h	drm: add clone mode check for CRTC	2025-01-08 01:39:58 +02:00
drm_damage_helper.h	drm/damage-helper: add const qualifier in drm_atomic_helper_damage_merged()	2025-03-03 14:45:40 +02:00
drm_debugfs_crc.h	drm/crc: make drm_debugfs_crc.h self-contained and fix kernel-doc	2024-03-07 17:17:25 +02:00
drm_debugfs.h	drm: add debugfs support on per client-id basis	2025-07-04 15:59:06 +02:00
drm_device.h	drm: Add missing struct drm_wedge_task_info kernel doc	2025-07-10 18:07:47 -03:00
drm_drv.h	drm: move drm based debugfs funcs to drm_debugfs.c	2025-07-04 15:58:22 +02:00
drm_edid.h	drm/dp: Add an EDID quirk for the DPCD register access probe	2025-06-12 20:44:01 +03:00
drm_eld.h
drm_encoder.h
drm_exec.h	Merge drm/drm-next into drm-misc-next	2024-01-29 14:20:23 +01:00
drm_fb_dma_helper.h	drm/fb_dma: s/drm_panic_gem_get_scanout_buffer/drm_fb_dma_get_scanout_buffer	2024-04-15 13:50:40 -03:00
drm_fb_helper.h	drm/fb-helper: Remove struct drm_fb_helper.fb_probe	2025-03-05 21:48:50 +01:00
drm_fbdev_dma.h	drm/fbdev-dma: Remove obsolete setup function	2024-09-26 09:31:27 +02:00
drm_fbdev_shmem.h	drm/fbdev-shmem: Remove obsolete setup function	2024-09-26 09:31:28 +02:00
drm_fbdev_ttm.h	drm/fbdev-ttm: Remove obsolete setup function	2024-09-26 09:31:29 +02:00
drm_file.h	drm for 6.17-rc1	2025-07-30 19:26:49 -07:00
drm_fixed.h	drm: fixed: Don't use "proxy" headers	2024-08-13 12:13:45 +03:00
drm_flip_work.h
drm_format_helper.h	drm/format-helper: introduce drm_fb_xrgb8888_to_gray2()	2025-09-01 15:35:07 +02:00
drm_fourcc.h	drm: Pass pixel_format+modifier directly to drm_get_format_info()	2025-07-16 20:01:13 +03:00
drm_framebuffer.h	drm/framebuffer: Acquire internal references on GEM handles	2025-07-09 14:03:28 +02:00
drm_gem_atomic_helper.h
drm_gem_dma_helper.h	fs: move FMODE_UNSIGNED_OFFSET to fop_flags	2024-08-30 08:22:36 +02:00
drm_gem_framebuffer_helper.h	drm/gem/afbc: Eliminate redundant drm_get_format_info()	2025-07-16 20:06:22 +03:00
drm_gem_shmem_helper.h	drm/gem-shmem: Do not map s/g table by default	2025-07-07 15:23:41 +02:00
drm_gem_ttm_helper.h
drm_gem_vram_helper.h	drm/gem-vram: Un-export pin helpers	2025-05-30 09:47:28 +02:00
drm_gem.h	gpuvm: remove gem.gpuva.lock_dep_map	2025-08-28 12:40:43 +02:00
drm_gpusvm.h	drm/gpusvm: Make drm_gpusvm_for_each_* macros public	2025-08-19 21:19:36 -07:00
drm_gpuvm.h	gpuvm: remove gem.gpuva.lock_dep_map	2025-08-28 12:40:43 +02:00
drm_ioctl.h
drm_kunit_helpers.h	Merge tag 'drm-misc-next-2025-04-09' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next	2025-04-14 15:29:49 +10:00
drm_lease.h	drm/lease: make drm_lease.h self-contained	2024-03-07 17:17:25 +02:00
drm_managed.h	drm: Simplify drmm_alloc_ordered_workqueue return	2025-07-03 10:14:56 -07:00
drm_mipi_dbi.h	drm/mipi-dbi: Add support for DRM_FORMAT_RGB888	2024-06-07 16:09:05 +02:00
drm_mipi_dsi.h	drm: Add MIPI read_multi func and two write macros	2025-08-14 15:42:26 -07:00
drm_mm.h	drm/mm: Remove unused drm_mm_replace_node	2024-06-06 10:24:13 -04:00
drm_mode_config.h	drm: Pass the format info to .fb_create()	2025-07-16 20:03:14 +03:00
drm_mode_object.h	drm/drm_mode_object: fix typo in kerneldoc	2025-02-04 14:11:14 +01:00
drm_modes.h
drm_modeset_helper_vtables.h	drm/atomic: Let drivers decide which planes to async flip	2025-02-14 00:54:29 +02:00
drm_modeset_helper.h	drm: Allow the caller to pass in the format info to drm_helper_mode_fill_fb_struct()	2025-07-16 20:04:45 +03:00
drm_modeset_lock.h
drm_module.h
drm_of.h	drm: of: Add drm_of_lvds_get_dual_link_pixel_order_sink()	2024-11-05 13:26:42 +02:00
drm_pagemap.h	drm/pagemap: Add a populate_mm op	2025-06-26 18:00:09 +02:00
drm_panel.h	drm/panel: Allow powering on panel follower after panel is enabled	2025-08-25 09:17:49 -07:00
drm_panic.h	drm/panic: Add a private field to struct drm_scanout_buffer	2025-06-27 11:48:22 +02:00
drm_pciids.h
drm_plane_helper.h
drm_plane.h	drm/plane: Add new plane property IN_FORMATS_ASYNC	2025-05-09 15:29:40 +05:30
drm_prime.h	drm/shmem-helper: Import dmabuf without mapping its sg_table	2025-06-03 09:21:01 +02:00
drm_print.h	drm/print: Add drm_coredump_printer_is_full	2025-04-24 15:51:41 -07:00
drm_privacy_screen_consumer.h
drm_privacy_screen_driver.h
drm_privacy_screen_machine.h
drm_probe_helper.h	drm/probe-helper: Do not fail from drmm_kms_helper_poll_init()	2025-03-24 09:31:03 +01:00
drm_property.h
drm_rect.h	drm/rect: Add drm_rect_overlap()	2024-08-23 16:47:56 +02:00
drm_self_refresh_helper.h
drm_simple_kms_helper.h
drm_suballoc.h	drm/suballoc: fix drm_suballoc.h kernel-doc	2024-03-07 17:17:25 +02:00
drm_syncobj.h
drm_sysfs.h
drm_util.h	drm: Move for_each_if() to util_macros.h for wider use	2025-02-17 14:27:35 +01:00
drm_utils.h	drm: panel-backlight-quirks: Add brightness mask quirk	2025-09-03 10:23:01 -05:00
drm_vblank_work.h	drm: Add drm_vblank_work_flush_all().	2024-06-24 18:03:18 +02:00
drm_vblank.h	drm/vblank: add dynamic per-crtc vblank configuration support	2024-07-26 17:40:10 -04:00
drm_vma_manager.h
drm_writeback.h	drm: writeback: Create drmm variants for drm_writeback_connector initialization	2025-01-21 10:32:33 +01:00
gpu_scheduler.h	drm/sched: Allow drivers to skip the reset and keep on running	2025-07-15 08:27:07 -03:00
gud.h
Makefile	scripts/kernel-doc.py: don't create *.pyc files	2025-04-24 10:12:46 -06:00
spsc_queue.h	drm/sched: Increment job count before swapping tail spsc queue	2025-07-01 16:14:47 -07:00
task_barrier.h