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alistair23-linux/drivers/gpu/drm
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Maarten Lankhorst 5b1ec9ac7a drm/i915/backlight: Fix backlight takeover on LPT, v3. 
On lynxpoint the bios sometimes sets up the backlight using the CPU
display, but the driver expects using the PWM PCH override register.

Read the value from the CPU register, then convert it to the other
units by converting from the old duty cycle, to freq, to the new units.

This value is then programmed in the override register, after which
we set the override and disable the CPU display control. This allows
us to switch the source without flickering, and make the backlight
controls work in the driver.

Changes since v1:
- Read BLC_PWM_CPU_CTL2 to cpu_ctl2.
- Clean up cpu_mode if slightly.
- Always disable BLM_PWM_ENABLE in cpu_ctl2.
Changes since v2:
- Simplify cpu_mode handling (Jani)

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108225
Cc: Basil Eric Rabi <ericbasil.rabi@gmail.com>
Cc: Hans de Goede <jwrdegoede@fedoraproject.org>
Cc: Tolga Cakir <cevelnet@gmail.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Tolga Cakir <cevelnet@gmail.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190108160842.13396-2-maarten.lankhorst@linux.intel.com
 		2019-01-24 13:02:48 +01:00
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amd drm: move drm_can_sleep() to drm_util.h 2019-01-14 10:58:37 +01:00
arc drm/arc: Don't set the dpms hook 2019-01-11 22:54:37 +01:00
arm drm: mali-dp: Enable Mali-DP tiled buffer formats 2018-11-02 09:57:27 +00:00
armada drm: armada: Cleanup drm_display_mode print str 2019-01-15 13:20:48 +01:00
ast drm: move drm_can_sleep() to drm_util.h 2019-01-14 10:58:37 +01:00
atmel-hlcdc drm/atmel-hlcdc: Use drm_fbdev_generic_setup() 2018-11-01 15:24:22 +01:00
bochs drm/bochs: move remaining fb bits to kms 2019-01-14 08:39:17 +01:00
bridge drm-misc-next for 5.1: 2019-01-18 09:31:28 +10:00
cirrus drm: move drm_can_sleep() to drm_util.h 2019-01-14 10:58:37 +01:00
etnaviv drm-misc-next for 5.1: 2019-01-10 05:58:52 +10:00
exynos drm-misc-next for 5.1: 2019-01-18 09:31:28 +10:00
fsl-dcu drm/fsl-dcu: Use drm_fbdev_generic_setup() 2018-11-01 15:23:58 +01:00
gma500
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hisilicon drm/hisilicon/kirin: Use drm_fbdev_generic_setup() 2019-01-14 12:33:36 +01:00
i2c drm-misc-next for 5.1: 2019-01-18 09:31:28 +10:00
i810
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i915 drm/i915/backlight: Fix backlight takeover on LPT, v3. 2019-01-24 13:02:48 +01:00
imx drm/imx: ipuv3-plane: add IDMAC timeout warning 2018-11-05 14:56:04 +01:00
lib
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mediatek drm-misc-next for 5.1: 2019-01-18 09:31:28 +10:00
meson drm/meson: remove firmware framebuffers 2019-01-14 16:56:11 +01:00
mga
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mgag200 drm: move drm_can_sleep() to drm_util.h 2019-01-14 10:58:37 +01:00
msm drm-misc-next for 5.1: 2019-01-18 09:31:28 +10:00
mxsfb drm/mxsfb: Use drm_fbdev_generic_setup() 2019-01-14 12:35:05 +01:00
nouveau drm: Move the legacy kms disable_all helper to crtc helpers 2019-01-11 22:54:29 +01:00
omapdrm drm: move drm_can_sleep() to drm_util.h 2019-01-14 10:58:37 +01:00
panel drm/panel: Add a driver for the TPO TPG110 2019-01-11 19:51:09 +01:00
pl111 drm/pl111: add of_node_put() 2018-11-28 09:31:07 -08:00
qxl drm: move drm_can_sleep() to drm_util.h 2019-01-14 10:58:37 +01:00
r128 drm/ati_pcigart: Fix error code in drm_ati_pcigart_init() 2018-12-17 10:47:17 +01:00
radeon drm: move drm_can_sleep() to drm_util.h 2019-01-14 10:58:37 +01:00
rcar-du drm-misc-next for 5.1: 2019-01-18 09:31:28 +10:00
rockchip drm-misc-next for 5.1: 2019-01-18 09:31:28 +10:00
savage
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scheduler drm/scheduler: Add drm_sched_suspend/resume_timeout() 2018-12-05 17:56:16 -05:00
selftests drm/selftest: fix spelling mistake "dimention" -> "dimension" 2018-12-11 15:19:42 +01:00
shmobile drm/shmob: Fix return value check in shmob_drm_probe 2019-01-14 03:51:16 +02:00
sis
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sti drm-misc-next for 5.1: 2019-01-18 09:31:28 +10:00
stm drm: bridge: Constify mode arguments to bridge .mode_set() operation 2019-01-14 03:51:14 +02:00
sun4i drm/edid: Pass connector to AVI infoframe functions 2019-01-10 19:01:06 +02:00
tdfx
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tegra Merge drm/drm-next into drm-misc-next 2019-01-11 16:32:10 +01:00
tilcdc tilcdc pull request for Linux v4.22 2019-01-11 06:29:31 +10:00
tinydrm drm/tinydrm: do not reply on drmP.h from drm_gem_cma_helper.h 2019-01-09 22:48:56 +01:00
ttm drm/ttm: Use drm_debug_printer for all ttm_bo_mem_space_debug output 2018-12-21 15:27:58 -05:00
tve200 drm: replace "drm_dev_unref" function with "drm_dev_put" 2018-11-24 22:12:54 +01:00
udl DRM: UDL: get rid of useless vblank initialization 2018-10-23 15:59:01 +02:00
v3d drm/v3d: Invalidate the caches from the outside in. 2018-12-07 10:56:51 -08:00
vc4 drm: move drm_can_sleep() to drm_util.h 2019-01-14 10:58:37 +01:00
vgem dma-buf: make fence sequence numbers 64 bit v2 2018-12-07 12:44:16 +01:00
via
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virtio drm/virtio: Drop deprecated load/unload initialization 2019-01-09 09:38:49 +01:00
vkms drm/vkms: set preferred depth to 24 2018-12-17 10:51:20 +01:00
vmwgfx IOMMU Updates for Linux v4.21 2019-01-01 15:55:29 -08:00
xen drm-misc-next for 5.1: 2019-01-10 05:58:52 +10:00
zte drm/edid: Pass connector to AVI infoframe functions 2019-01-10 19:01:06 +02:00
Kconfig
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Makefile Merge tag 'vmwgfx-next-2018-12-05' of git://people.freedesktop.org/~thomash/linux into drm-next 2018-12-06 13:43:56 +10:00
ati_pcigart.c drm/ati_pcigart: Fix error code in drm_ati_pcigart_init() 2018-12-17 10:47:17 +01:00
drm_agpsupport.c
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drm_atomic.c drm-misc-next for 5.1: 2019-01-10 05:58:52 +10:00
drm_atomic_helper.c Final changes to drm-misc-next for v4.21: 2018-12-07 11:23:05 +10:00
drm_atomic_state_helper.c drm: Put damage blob when destroy plane state 2018-12-24 11:53:50 +01:00
drm_atomic_uapi.c Merge tag 'vmwgfx-next-2018-12-05' of git://people.freedesktop.org/~thomash/linux into drm-next 2018-12-06 13:43:56 +10:00
drm_auth.c drm: set is_master to 0 upon drm_new_set_master() failure 2018-11-26 16:14:27 -05:00
drm_blend.c
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drm_bridge.c drm: bridge: Constify mode arguments to bridge .mode_set() operation 2019-01-14 03:51:14 +02:00
drm_bufs.c drm: un-inline drm_legacy_findmap() 2019-01-02 11:37:11 +02:00
drm_cache.c
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drm_client.c drm/gem: Add drm_gem_object_funcs 2018-11-20 14:56:18 +01:00
drm_color_mgmt.c drm: Add color management LUT validation helper (v4) 2019-01-23 16:29:32 -08:00
drm_connector.c drm-misc-next for 5.1: 2019-01-10 05:58:52 +10:00
drm_context.c drm: Fix error handling in drm_legacy_addctx 2019-01-07 11:26:31 +01:00
drm_crtc.c drm: Move the legacy kms disable_all helper to crtc helpers 2019-01-11 22:54:29 +01:00
drm_crtc_helper.c drm: Remove use of drm_mode_object 2019-01-15 13:20:56 +01:00
drm_crtc_helper_internal.h
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drm_crtc_internal.h drm: Unexport drm_crtc_force_disable 2019-01-11 15:56:40 +01:00
drm_damage_helper.c drm: fix null pointer dereference on null state pointer 2018-12-24 11:52:43 +01:00
drm_debugfs.c drm: Merge drm_info.c into drm_debugfs.c 2018-11-22 09:52:27 +01:00
drm_debugfs_crc.c
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drm_dma.c
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drm_dp_aux_dev.c
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drm_dp_cec.c drm: Do not call drm_dp_cec_set_edid() while registering DP connectors 2018-10-11 10:52:35 +02:00
drm_dp_dual_mode_helper.c
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drm_dp_helper.c Merge drm/drm-next into drm-intel-next-queued 2019-01-22 14:51:36 -08:00
drm_dp_mst_topology.c drm/dp_mst: Check payload count in drm_dp_mst_atomic_check() 2019-01-10 20:45:25 -05:00
drm_drv.c drm/docs: improve docs for drm_drv.c 2019-01-12 13:07:30 +01:00
drm_dsc.c drm/dsc: Add helpers for DSC picture parameter set infoframes 2018-11-27 18:35:17 -08:00
drm_dumb_buffers.c
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drm_edid.c drm/edid: Add display_info.rgb_quant_range_selectable 2019-01-10 19:01:06 +02:00
drm_edid_load.c
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drm_encoder.c
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drm_encoder_slave.c
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drm_fb_cma_helper.c drm-misc-next for v4.21, part 1: 2018-11-19 10:40:33 +10:00
drm_fb_helper.c Merge drm/drm-next into drm-misc-next 2019-01-11 16:32:10 +01:00
drm_file.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
drm_flip_work.c drm: move drm_can_sleep() to drm_util.h 2019-01-14 10:58:37 +01:00
drm_fourcc.c drm: Introduce new DRM_FORMAT_XYUV 2018-11-20 16:20:13 +02:00
drm_framebuffer.c drm: move EXPORT_SYMBOL_FOR_TESTS_ONLY to drm_util.h 2019-01-14 10:58:37 +01:00
drm_gem.c drm/gem: Mark pinned pages as unevictable 2019-01-09 21:24:50 +00:00
drm_gem_cma_helper.c drm/cma-helper: Add DRM_GEM_CMA_VMAP_DRIVER_OPS 2018-11-20 14:57:25 +01:00
drm_gem_framebuffer_helper.c drm/fourcc: Add char_per_block, block_w and block_h in drm_format_info 2018-11-02 09:55:27 +00:00
drm_hashtab.c
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drm_internal.h drm-misc-next for 5.1: 2019-01-10 05:58:52 +10:00
drm_ioc32.c
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drm_ioctl.c drm/ioctl: Fix Spectre v1 vulnerabilities 2018-12-20 08:13:29 +01:00
drm_irq.c
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drm_kms_helper_common.c
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drm_lease.c drm-misc-next for 5.1: 2019-01-10 05:58:52 +10:00
drm_legacy.h
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drm_lock.c
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drm_memory.c drm: Shift * to be adjacent to pointer name 2018-10-16 14:39:25 +02:00
drm_mipi_dsi.c
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drm_mm.c
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drm_mode_config.c drm-misc-next for 5.1: 2019-01-10 05:58:52 +10:00
drm_mode_object.c drm: Reorder set_property_atomic to avoid returning with an active ww_ctx 2019-01-03 09:54:26 +00:00
drm_modes.c drm: Remove use of drm_mode_object 2019-01-15 13:20:56 +01:00
drm_modeset_helper.c
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drm_modeset_lock.c drm/atomic: integrate modeset lock with private objects 2018-12-11 15:24:30 +01:00
drm_of.c drm/of: Fix kerneldoc 2019-01-12 13:07:58 +01:00
drm_panel.c drm/panel: Small documentation polish 2019-01-12 13:08:12 +01:00
drm_panel_orientation_quirks.c drm: panel-orientation-quirks: Do rotation quirk for new GPD Win2 FW 2018-11-15 10:55:30 +01:00
drm_pci.c drm/drm_pci.c: Use dma_zalloc_coherent 2018-10-23 15:59:01 +02:00
drm_plane.c drm: Auto-set allow_fb_modifiers when given modifiers at plane init 2019-01-11 16:53:55 +01:00
drm_plane_helper.c
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drm_prime.c drm/prime: Fix drm_gem_prime_mmap() stack use 2018-11-22 15:44:05 +01:00
drm_print.c
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drm_probe_helper.c
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drm_property.c
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drm_rect.c
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drm_scatter.c
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drm_scdc_helper.c
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drm_simple_kms_helper.c drm/tinydrm: Advertise that we can do only DRM_FORMAT_MOD_LINEAR. 2018-10-30 13:01:50 -07:00
drm_syncobj.c drm/syncobj: remove drm_syncobj_cb and cleanup 2018-12-11 17:38:38 +01:00
drm_sysfs.c drm/lease: Send a distinct uevent 2018-11-30 10:57:18 +01:00
drm_trace.h
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drm_trace_points.c
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drm_vblank.c drm/vblank: Allow dynamic per-crtc max_vblank_count 2019-01-14 21:23:55 +02:00
drm_vm.c
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drm_vma_manager.c
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drm_writeback.c
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