mirror of
https://github.com/torvalds/linux.git
synced 2026-10-28 17:55:02 +01:00
bad177fa75
The Lenovo Legion 5 15ARH05 (Renoir) ships a BOE 0x08DF eDP panel that
advertises AUX/DPCD backlight control, so amdgpu's automatic detection
(amdgpu_backlight == -1) selects AUX. On this panel the AUX backlight
path has no effect: brightness writes are accepted but the panel level
never changes, the display is stuck at a fixed brightness and
max_brightness is reported as a bogus 511000. As a result neither the
desktop 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 long
been applied by users as a manual kernel-parameter workaround.
Extend the generic panel backlight quirk with a force_pwm flag, add an
entry for the Legion 5 15ARH05 / BOE 0x08DF panel, and have amdgpu
disable AUX backlight (use PWM) when the quirk matches and the user
lets the driver auto-select the backlight type.
Signed-off-by: Alessandro Rinaldi <ale@alerinaldi.it>
Tested-by: Alessandro Rinaldi <ale@alerinaldi.it>
Reviewed-by: George Zhang <george.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit
|
||
|---|---|---|
| .. | ||
| amd | ||
| bridge | ||
| clients | ||
| display | ||
| intel | ||
| ttm | ||
| amd_asic_type.h | ||
| drm_accel.h | ||
| drm_atomic_helper.h | ||
| drm_atomic_state_helper.h | ||
| drm_atomic_uapi.h | ||
| drm_atomic.h | ||
| drm_audio_component.h | ||
| drm_auth.h | ||
| drm_blend.h | ||
| drm_bridge_connector.h | ||
| drm_bridge_helper.h | ||
| drm_bridge.h | ||
| drm_buddy.h | ||
| drm_cache.h | ||
| drm_client_event.h | ||
| drm_client.h | ||
| drm_color_mgmt.h | ||
| drm_colorop.h | ||
| drm_connector.h | ||
| drm_crtc_helper.h | ||
| drm_crtc.h | ||
| drm_damage_helper.h | ||
| drm_debugfs_crc.h | ||
| drm_debugfs.h | ||
| drm_device.h | ||
| drm_drv.h | ||
| drm_dumb_buffers.h | ||
| drm_edid.h | ||
| drm_eld.h | ||
| drm_encoder.h | ||
| drm_exec.h | ||
| drm_fb_dma_helper.h | ||
| drm_fb_helper.h | ||
| drm_fbdev_dma.h | ||
| drm_fbdev_shmem.h | ||
| drm_fbdev_ttm.h | ||
| drm_file.h | ||
| drm_fixed.h | ||
| drm_flip_work.h | ||
| drm_format_helper.h | ||
| drm_fourcc.h | ||
| drm_framebuffer.h | ||
| drm_gem_atomic_helper.h | ||
| drm_gem_dma_helper.h | ||
| drm_gem_framebuffer_helper.h | ||
| drm_gem_shmem_helper.h | ||
| drm_gem_ttm_helper.h | ||
| drm_gem_vram_helper.h | ||
| drm_gem.h | ||
| drm_gpusvm.h | ||
| drm_gpuvm.h | ||
| drm_ioctl.h | ||
| drm_kunit_helpers.h | ||
| drm_lease.h | ||
| drm_managed.h | ||
| drm_mipi_dbi.h | ||
| drm_mipi_dsi.h | ||
| drm_mm.h | ||
| drm_mode_config.h | ||
| drm_mode_object.h | ||
| drm_modes.h | ||
| drm_modeset_helper_vtables.h | ||
| drm_modeset_helper.h | ||
| drm_modeset_lock.h | ||
| drm_module.h | ||
| drm_of.h | ||
| drm_pagemap_util.h | ||
| drm_pagemap.h | ||
| drm_panel.h | ||
| drm_panic.h | ||
| drm_pciids.h | ||
| drm_plane_helper.h | ||
| drm_plane.h | ||
| drm_prime.h | ||
| drm_print.h | ||
| drm_privacy_screen_consumer.h | ||
| drm_privacy_screen_driver.h | ||
| drm_privacy_screen_machine.h | ||
| drm_probe_helper.h | ||
| drm_property.h | ||
| drm_ras_genl_family.h | ||
| drm_ras.h | ||
| drm_rect.h | ||
| drm_self_refresh_helper.h | ||
| drm_simple_kms_helper.h | ||
| drm_suballoc.h | ||
| drm_syncobj.h | ||
| drm_sysfs.h | ||
| drm_util.h | ||
| drm_utils.h | ||
| drm_vblank_helper.h | ||
| drm_vblank_work.h | ||
| drm_vblank.h | ||
| drm_vma_manager.h | ||
| drm_writeback.h | ||
| gpu_scheduler.h | ||
| gud.h | ||
| Makefile | ||
| spsc_queue.h | ||
| task_barrier.h | ||