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linux/include/drm
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Lyude Paul 867cf9cd73 drm/dp: Extract i915's eDP backlight code into DRM helpers 
Since we're about to implement eDP backlight support in nouveau using the
standard protocol from VESA, we might as well just take the code that's
already written for this and move it into a set of shared DRM helpers.

Note that these helpers are intended to handle DPCD related backlight
control bits such as setting the brightness level over AUX, probing the
backlight's TCON, enabling/disabling the backlight over AUX if supported,
etc. Any PWM-related portions of backlight control are explicitly left up
to the driver, as these will vary from platform to platform.

The only exception to this is the calculation of the PWM frequency
pre-divider value. This is because the only platform-specific information
required for this is the PWM frequency of the panel, which the driver is
expected to provide if available. The actual algorithm for calculating this
value is standard and is defined in the eDP specification from VESA.

Note that these helpers do not yet implement the full range of features
the VESA backlight interface provides, and only provide the following
functionality (all of which was already present in i915's DPCD backlight
support):

* Basic control of brightness levels
* Basic probing of backlight capabilities
* Helpers for enabling and disabling the backlight

v3:
* Split out changes to i915's backlight code to separate patches to make it
  easier to review
v4:
* Style/spelling changes from Thomas Zimmermann
v5:
* Start using new drm_dbg_*() functions

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: greg.depoire@gmail.com
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210514181504.565252-9-lyude@redhat.com
 		2021-06-09 13:35:22 -04:00
..
bridge drm/bridge/synopsys: dw-hdmi: Add an option to suppress loading CEC driver 2021-04-20 17:22:38 +02:00
i2c
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ttm drm/ttm: Document and optimize ttm_bo_pipeline_gutting() 2021-06-07 16:07:08 +02:00
amd_asic_type.h drm/amd/amdgpu: add beige_goby asic type 2021-05-19 22:39:45 -04:00
drm_aperture.h drm/aperture: Add infrastructure for aperture ownership 2021-05-01 12:45:03 +02:00
drm_atomic.h drm: Introduce a drm_crtc_commit_wait helper 2021-01-21 12:11:04 +01:00
drm_atomic_helper.h drm: automatic legacy gamma support 2020-12-15 15:46:03 +02:00
drm_atomic_state_helper.h drm/bridge: Add a drm_bridge_state object 2020-01-31 16:00:21 +01:00
drm_atomic_uapi.h
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drm_audio_component.h ALSA: hda/i915 - fix list corruption with concurrent probes 2020-10-09 16:46:04 +02:00
drm_auth.h drm: make drm/drm_auth.h self contained 2019-05-27 18:05:44 +02:00
drm_blend.h
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drm_bridge.h drm: drm_bridge.h: delete duplicated word in comment 2020-07-15 14:02:34 +02:00
drm_bridge_connector.h drm: Add helper to create a connector for a chain of bridges 2020-02-26 13:31:41 +02:00
drm_cache.h drm: Add a prefetching memcpy_from_wc 2021-06-07 16:07:08 +02:00
drm_client.h drm/gem: Store client buffer mappings as struct dma_buf_map 2020-11-09 09:19:45 +01:00
drm_color_mgmt.h drm: Inline drm_color_lut_extract() 2019-11-29 21:29:17 +02:00
drm_connector.h drm/connector: Add a helper to attach the colorspace property 2021-05-07 17:14:59 +02:00
drm_crtc.h drm: drm_crc: fix a kernel-doc markup 2021-01-14 15:11:46 +01:00
drm_crtc_helper.h drm: Split out drm_probe_helper.h 2019-01-24 13:20:42 +01:00
drm_damage_helper.h drm/damage-helper: Add drm_atomic_helper_damage_merged() 2019-01-17 10:56:54 +01:00
drm_debugfs.h drm/debugfs: remove checks for return value of drm_debugfs functions. 2020-03-18 17:32:20 +01:00
drm_debugfs_crc.h
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drm_device.h drm: Mark AGP implementation and ioctls as legacy 2021-05-10 15:46:58 +02:00
drm_displayid.h drm/displayid: rename displayid_hdr to displayid_header 2021-03-31 15:42:39 +03:00
drm_dp_dual_mode_helper.h drm/dp_dual_mode: Pass drm_device to drm_lspcon_(get|set)_mode() 2021-04-27 18:43:44 -04:00
drm_dp_helper.h drm/dp: Extract i915's eDP backlight code into DRM helpers 2021-06-09 13:35:22 -04:00
drm_dp_mst_helper.h drm/dp_mst: Use kHz as link rate units when settig source max link caps at init 2021-05-27 15:30:59 -04:00
drm_drv.h drm: Fix 3 typos in the inline doc 2021-03-26 11:46:33 +01:00
drm_dsc.h - Display hotplug fix for gen2/gen3 (Chris) 2021-01-07 12:20:29 +01:00
drm_edid.h drm/displayid: add separate drm_displayid.c 2021-03-31 15:41:35 +03:00
drm_encoder.h drm/encoder: Add macro drmm_plain_encoder_alloc() 2021-03-29 16:46:43 +01:00
drm_encoder_slave.h drm: remove include of drmP.h from drm_encoder_slave.h 2019-01-09 22:35:35 +01:00
drm_fb_cma_helper.h drm: Add and export function drm_fb_cma_sync_non_coherent 2021-05-25 11:42:09 +01:00
drm_fb_helper.h drm/aperture: Inline fbdev conflict helpers into aperture helpers 2021-04-14 09:00:04 +02:00
drm_file.h drm/drm_vblank: set the dma-fence timestamp during send_vblank_event 2021-02-24 21:05:54 +05:30
drm_fixed.h
…
drm_flip_work.h
…
drm_format_helper.h drm/format-helper: Add blitter functions 2021-05-01 12:45:03 +02:00
drm_fourcc.h drm/fourcc: Remove struct drm_format_buf_name 2021-05-27 08:34:57 +02:00
drm_framebuffer.h drm/core: Calculate bpp in afbc helper 2020-04-01 14:11:22 +02:00
drm_gem.h drm: Don't export the drm_gem_dumb_destroy() function 2021-01-05 07:20:25 +02:00
drm_gem_atomic_helper.h drm/gem: Move drm_gem_fb_prepare_fb() to GEM atomic helpers 2021-02-23 08:54:22 +01:00
drm_gem_cma_helper.h drm: Add support for GEM buffers backed by non-coherent memory 2021-05-25 11:41:07 +01:00
drm_gem_framebuffer_helper.h drm/gem: Move drm_gem_fb_prepare_fb() to GEM atomic helpers 2021-02-23 08:54:22 +01:00
drm_gem_shmem_helper.h drm/shmem-helper: Removed drm_gem_shmem_create_object_cached() 2020-11-24 09:10:33 +01:00
drm_gem_ttm_helper.h drm/gem-ttm-helper: Provide helper for struct drm_driver.dumb_map_offset 2021-04-11 20:14:45 +02:00
drm_gem_vram_helper.h drm/vram-helper: Use drm_gem_ttm_dumb_map_offset() 2021-04-11 20:15:06 +02:00
drm_hashtab.h
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drm_hdcp.h drm/hdcp: DP HDCP2.2 errata LC_Send_L_Prime=16 2021-03-31 14:27:43 +03:00
drm_ioctl.h drm/ioctl: Ditch DRM_UNLOCKED except for the legacy vblank ioctl 2019-06-21 19:13:10 +02:00
drm_irq.h drm/irq: Add the new api to install irq 2020-12-03 03:57:15 -05:00
drm_lease.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
drm_legacy.h drm: Mark AGP implementation and ioctls as legacy 2021-05-10 15:46:58 +02:00
drm_managed.h drm: Remove drmm_add_final_kfree() declaration from public headers 2020-12-05 20:01:12 +01:00
drm_mipi_dbi.h drm/mipi-dbi: Switch to new kerneldoc syntax for named variable macro argument 2021-01-08 09:54:43 +01:00
drm_mipi_dsi.h drm/dsi: add helpers for DSI compression mode and PPS packets 2019-11-07 15:00:16 +02:00
drm_mm.h drm: fix spelling error in comments 2020-09-17 13:39:44 +02:00
drm_mode_config.h drm/modifiers: Enforce consistency between the cap an IN_FORMATS 2021-05-12 11:31:29 +02:00
drm_mode_object.h
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drm_modes.h drm/modes: add non-OF stub for of_get_drm_display_mode 2021-01-08 19:42:14 +01:00
drm_modeset_helper.h drm: remove drmP.h from drm_modeset_helper.h 2019-02-07 21:48:34 +01:00
drm_modeset_helper_vtables.h drm/atomic: Pass the full state to planes atomic disable and update 2021-02-25 08:05:28 +01:00
drm_modeset_lock.h drm/modeset-lock: Take the modeset BKL for legacy drivers 2020-08-17 13:41:50 -04:00
drm_of.h drm: of: Fix linking when CONFIG_OF is not set 2020-01-09 10:40:58 +10:00
drm_panel.h drm/panel: Add helper for reading DT rotation 2020-08-16 17:12:18 +02:00
drm_pciids.h
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drm_plane.h drm/gem: Move drm_gem_fb_prepare_fb() to GEM atomic helpers 2021-02-23 08:54:22 +01:00
drm_plane_helper.h
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drm_prime.h drm/prime: split array import functions v4 2020-11-30 15:00:45 +01:00
drm_print.h drm/print: Handle potentially NULL drm_devices in drm_dbg_* 2021-04-27 18:43:44 -04:00
drm_probe_helper.h drm: Split out drm_probe_helper.h 2019-01-24 13:20:42 +01:00
drm_property.h drm: Fix macro name DRM_MODE_PROP_OBJECT in code comment 2021-01-12 09:56:48 +01:00
drm_rect.h drm: Add function to convert rect in 16.16 fixed format to regular format 2021-01-05 05:32:52 -08:00
drm_scdc_helper.h drm/scdc: Fix typo in bit definition of SCDC_STATUS_FLAGS 2019-11-04 17:58:46 +01:00
drm_self_refresh_helper.h drm/atomic: fix self-refresh helpers crtc state dereference 2019-11-06 13:00:21 -05:00
drm_simple_kms_helper.h drm/gem: Move drm_gem_fb_prepare_fb() to GEM atomic helpers 2021-02-23 08:54:22 +01:00
drm_syncobj.h drm/syncobj: add new drm_syncobj_add_point interface v4 2019-04-01 12:05:53 +02:00
drm_sysfs.h drm: uevent for connector status change 2019-08-06 13:16:54 +05:30
drm_util.h drm: Move EXPORT_SYMBOL_FOR_TESTS_ONLY under a separate Kconfig 2019-11-07 21:22:15 +00:00
drm_utils.h drm: export drm_timeout_abs_to_jiffies 2019-03-07 12:00:30 -06:00
drm_vblank.h drm/vblank: Document drm_crtc_vblank_restore constraints 2021-02-10 12:38:55 +01:00
drm_vblank_work.h drm/vblank: Add vblank works 2020-07-16 18:16:31 -04:00
drm_vma_manager.h drm: increase drm mmap_range size to 1TB 2019-04-24 16:20:23 -05:00
drm_writeback.h drm/writeback: wire drm_writeback.h to kernel-doc 2020-04-07 17:39:46 +02:00
gma_drm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335 2019-06-05 17:37:06 +02:00
gpu_scheduler.h drm/sched: Fix inverted comment for hang_limit 2021-06-03 10:32:49 +02:00
gud.h drm: Add GUD USB Display driver 2021-03-16 13:12:46 +01:00
i915_component.h drm/i915/tgl: Add additional ports for Tiger Lake 2019-07-11 16:31:14 -07:00
i915_drm.h drm: Move port definition back to i915 header 2019-08-30 14:08:26 +05:30
i915_mei_hdcp_interface.h drm/i915: significantly reduce the use of <drm/i915_drm.h> 2020-02-27 08:35:09 +02:00
i915_pciids.h drm/i915/adl_p: Add PCI Devices IDs 2021-05-07 10:51:38 +03:00
intel-gtt.h iommu/vt-d: Move intel_iommu_gfx_mapped to Intel IOMMU header 2020-09-04 12:12:45 +02:00
intel_lpe_audio.h
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spsc_queue.h
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task_barrier.h drm: Add Reusable task barrier. 2019-12-18 16:09:12 -05:00