Jani Nikula 425faacff2 drm/i915/backlight: fix CPU mode backlight takeover on LPT ... [ Upstream commit bb83d5fb55 ] The pch_get_backlight(), lpt_get_backlight(), and lpt_set_backlight() functions operate directly on the hardware registers. If inverting the value is needed, using intel_panel_compute_brightness(), it should only be done in the interface between hardware registers and panel->backlight.level. The CPU mode takeover code added in commit 5b1ec9ac7a ("drm/i915/backlight: Fix backlight takeover on LPT, v3.") reads the hardware register and converts to panel->backlight.level correctly, however the value written back should remain in the hardware register "domain". This hasn't been an issue, because GM45 machines are the only known users of i915.invert_brightness and the brightness invert quirk, and without one of them no conversion is made. It's likely nobody's ever hit the problem. Fixes: 5b1ec9ac7a ("drm/i915/backlight: Fix backlight takeover on LPT, v3.") Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Lyude Paul <lyude@redhat.com> Cc: <stable@vger.kernel.org> # v5.1+ Reviewed-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210108152841.6944-1-jani.nikula@intel.com (cherry picked from commit 0d4ced1c5b) Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-01-19 18:26:13 +01:00
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Makefile	drm/i915: use upstream version of header tests	2019-07-30 12:11:57 +03:00
dvo_ch7xxx.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
dvo_ch7017.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
dvo_ivch.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
dvo_ns2501.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
dvo_sil164.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
dvo_tfp410.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
icl_dsi.c	drm/i915: Wrappers for display register waits	2019-08-16 22:19:05 +01:00
intel_acpi.c	…
intel_acpi.h	…
intel_atomic.c	drm/i915: Preload LUTs if the hw isn't currently using them	2019-11-18 09:20:27 -08:00
intel_atomic.h	…
intel_atomic_plane.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_atomic_plane.h	drm/i915: Pass intel state to plane functions as well	2019-07-01 10:32:45 +02:00
intel_audio.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_audio.h	…
intel_bios.c	drm/i915: Favor last VBT child device with conflicting AUX ch/DDC pin	2019-10-16 10:56:50 -07:00
intel_bios.h	drm/i915: Propagate "_remove" function name suffix down	2019-07-12 13:05:08 +01:00
intel_bw.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_bw.h	drm/i915/bw: make intel_atomic_get_bw_state() static	2019-08-07 12:01:46 +03:00
intel_cdclk.c	drm/i915: Wrappers for display register waits	2019-08-16 22:19:05 +01:00
intel_cdclk.h	…
intel_color.c	drm/i915: Preload LUTs if the hw isn't currently using them	2019-11-18 09:20:27 -08:00
intel_color.h	…
intel_combo_phy.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_combo_phy.h	drm/i915/gen11: Convert combo PHY logic to use new 'enum phy' namespace	2019-07-10 18:22:34 -07:00
intel_connector.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_connector.h	…
intel_crt.c	drm/i915: Avoid HPD poll detect triggering a new detect cycle	2019-11-04 13:24:11 -08:00
intel_crt.h	…
intel_ddi.c	drm/i915/icl+: Don't enable DDI IO power on a TypeC port in TBT mode	2020-04-17 10:50:25 +02:00
intel_ddi.h	…
intel_display.c	drm/i915: Handle max_bpc==16	2020-11-24 13:29:23 +01:00
intel_display.h	drm/i915/dp: Fix dsc bpp calculations, v5.	2019-10-02 22:20:22 -07:00
intel_display_power.c	drm/i915: Program MBUS with rmw during initialization	2020-03-12 13:00:27 +01:00
intel_display_power.h	drm/i915: Move i915_power_well_id out of i915_reg.h	2019-08-16 21:52:47 +01:00
intel_display_types.h	drm/i915: Preload LUTs if the hw isn't currently using them	2019-11-18 09:20:27 -08:00
intel_dp.c	drm/i915/display/dp: Compute the correct slice count for VDSC on DP	2020-12-16 10:56:58 +01:00
intel_dp.h	drm/i915/dp: Fix dsc bpp calculations, v5.	2019-10-02 22:20:22 -07:00
intel_dp_aux_backlight.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_dp_aux_backlight.h	…
intel_dp_link_training.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_dp_link_training.h	…
intel_dp_mst.c	drm/i915: fix port checks for MST support on gen >= 11	2020-06-07 13:18:48 +02:00
intel_dp_mst.h	drm/i915/mst: un-inline intel_dp_mst_encoder_active_links()	2019-08-07 12:01:51 +03:00
intel_dpio_phy.c	drm/i915: Wrappers for display register waits	2019-08-16 22:19:05 +01:00
intel_dpio_phy.h	…
intel_dpll_mgr.c	drm/i915: Fix PCH reference clock for FDI on HSW/BDW	2019-10-29 21:50:24 -07:00
intel_dpll_mgr.h	drm/i915/tgl: Fix doc not corresponding to code	2019-10-29 15:33:12 -07:00
intel_dsi.c	…
intel_dsi.h	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_dsi_dcs_backlight.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_dsi_dcs_backlight.h	…
intel_dsi_vbt.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_dvo.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_dvo.h	…
intel_dvo_dev.h	…
intel_fbc.c	Make the "Reducing compressed framebufer size" message be DRM_INFO_ONCE()	2020-05-20 08:20:32 +02:00
intel_fbc.h	…
intel_fbdev.c	drm/i915/fbdev: Restore physical addresses for fb_mmap()	2019-11-21 00:09:22 -08:00
intel_fbdev.h	…
intel_fifo_underrun.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_fifo_underrun.h	…
intel_frontbuffer.c	drm/i915: Extract intel_frontbuffer active tracking	2019-08-16 09:51:11 +01:00
intel_frontbuffer.h	drm/i915: Extract intel_frontbuffer active tracking	2019-08-16 09:51:11 +01:00
intel_gmbus.c	drm/i915/gen11: Allow usage of all GPIO pins	2019-08-19 07:51:12 -07:00
intel_gmbus.h	drm/i915: Move gmbus definitions out of i915_reg.h	2019-08-16 21:52:49 +01:00
intel_hdcp.c	Merge drm/drm-next into drm-intel-next-queued	2019-08-22 00:10:36 -07:00
intel_hdcp.h	drm/i915: Attach content type property	2019-08-06 13:15:41 +05:30
intel_hdmi.c	drm/i915: Avoid HPD poll detect triggering a new detect cycle	2019-11-04 13:24:11 -08:00
intel_hdmi.h	…
intel_hotplug.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_hotplug.h	drm/i915: Add support for retrying hotplug	2019-07-15 12:13:34 -07:00
intel_lpe_audio.c	…
intel_lpe_audio.h	…
intel_lspcon.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_lspcon.h	…
intel_lvds.c	drm/i915: Wrappers for display register waits	2019-08-16 22:19:05 +01:00
intel_lvds.h	…
intel_opregion.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_opregion.h	…
intel_overlay.c	drm/i915: Replace i915_vma_put_fence()	2019-08-22 08:53:42 +01:00
intel_overlay.h	…
intel_panel.c	drm/i915/backlight: fix CPU mode backlight takeover on LPT	2021-01-19 18:26:13 +01:00
intel_panel.h	…
intel_pipe_crc.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_pipe_crc.h	…
intel_psr.c	drm/i915: Wrappers for display register waits	2019-08-16 22:19:05 +01:00
intel_psr.h	…
intel_quirks.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_quirks.h	…
intel_sdvo.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_sdvo.h	…
intel_sdvo_regs.h	…
intel_sprite.c	drm/i915: Fix g4x sprite scaling stride check with GTT remapping	2019-10-02 22:20:33 -07:00
intel_sprite.h	drm/i915/sprite: un-inline icl_is_hdr_plane()	2019-08-07 12:01:35 +03:00
intel_tc.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_tc.h	drm/i915/tc: un-inline intel_tc_port_ref_held()	2019-08-07 12:02:02 +03:00
intel_tv.c	drm/i915: rename intel_drv.h to display/intel_display_types.h	2019-08-07 12:43:50 +03:00
intel_tv.h	…
intel_vbt_defs.h	drm/i915/gen11: Allow usage of all GPIO pins	2019-08-19 07:51:12 -07:00
intel_vdsc.c	drm main pull for 5.4-rc1	2019-09-19 16:24:24 -07:00
intel_vdsc.h	…
vlv_dsi.c	drm/i915: Wrappers for display register waits	2019-08-16 22:19:05 +01:00
vlv_dsi_pll.c	drm/i915: Wrappers for display register waits	2019-08-16 22:19:05 +01:00