Lines Matching +full:pwm +full:- +full:backlight
1 // SPDX-License-Identifier: MIT
6 #include <linux/backlight.h>
8 #include <linux/pwm.h>
28 * scale - scale values from one range to another
52 target_val = mul_u32_u32(source_val - source_min, in scale()
53 target_max - target_min); in scale()
54 target_val = DIV_ROUND_CLOSEST_ULL(target_val, source_max - source_min); in scale()
67 struct intel_panel *panel = &connector->panel; in clamp_user_to_hw()
70 hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max); in clamp_user_to_hw()
71 hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max); in clamp_user_to_hw()
80 struct intel_panel *panel = &connector->panel; in scale_hw_to_user()
82 return scale(hw_level, panel->backlight.min, panel->backlight.max, in scale_hw_to_user()
89 struct intel_panel *panel = &connector->panel; in intel_backlight_invert_pwm_level()
91 drm_WARN_ON(display->drm, panel->backlight.pwm_level_max == 0); in intel_backlight_invert_pwm_level()
93 if (display->params.invert_brightness < 0) in intel_backlight_invert_pwm_level()
96 if (display->params.invert_brightness > 0 || in intel_backlight_invert_pwm_level()
98 return panel->backlight.pwm_level_max - val + panel->backlight.pwm_level_min; in intel_backlight_invert_pwm_level()
106 struct intel_connector *connector = to_intel_connector(conn_state->connector); in intel_backlight_set_pwm_level()
108 struct intel_panel *panel = &connector->panel; in intel_backlight_set_pwm_level()
110 drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s] set backlight PWM = %d\n", in intel_backlight_set_pwm_level()
111 connector->base.base.id, connector->base.name, val); in intel_backlight_set_pwm_level()
112 panel->backlight.pwm_funcs->set(conn_state, val); in intel_backlight_set_pwm_level()
118 struct intel_panel *panel = &connector->panel; in intel_backlight_level_to_pwm()
120 drm_WARN_ON_ONCE(display->drm, in intel_backlight_level_to_pwm()
121 panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0); in intel_backlight_level_to_pwm()
123 val = scale(val, panel->backlight.min, panel->backlight.max, in intel_backlight_level_to_pwm()
124 panel->backlight.pwm_level_min, panel->backlight.pwm_level_max); in intel_backlight_level_to_pwm()
132 struct intel_panel *panel = &connector->panel; in intel_backlight_level_from_pwm()
134 drm_WARN_ON_ONCE(display->drm, in intel_backlight_level_from_pwm()
135 panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0); in intel_backlight_level_from_pwm()
137 if (display->params.invert_brightness > 0 || in intel_backlight_level_from_pwm()
138 (display->params.invert_brightness == 0 && in intel_backlight_level_from_pwm()
140 val = panel->backlight.pwm_level_max - (val - panel->backlight.pwm_level_min); in intel_backlight_level_from_pwm()
142 return scale(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max, in intel_backlight_level_from_pwm()
143 panel->backlight.min, panel->backlight.max); in intel_backlight_level_from_pwm()
163 struct intel_panel *panel = &connector->panel; in i9xx_get_backlight()
170 if (panel->backlight.combination_mode) { in i9xx_get_backlight()
171 struct pci_dev *pdev = to_pci_dev(display->drm->dev); in i9xx_get_backlight()
185 if (drm_WARN_ON(display->drm, pipe != PIPE_A && pipe != PIPE_B)) in vlv_get_backlight()
194 struct intel_panel *panel = &connector->panel; in bxt_get_backlight()
196 return intel_de_read(display, BXT_BLC_PWM_DUTY(panel->backlight.controller)); in bxt_get_backlight()
201 struct intel_panel *panel = &connector->panel; in ext_pwm_get_backlight()
204 pwm_get_state(panel->backlight.pwm, &state); in ext_pwm_get_backlight()
210 struct intel_connector *connector = to_intel_connector(conn_state->connector); in lpt_set_backlight()
220 struct intel_connector *connector = to_intel_connector(conn_state->connector); in pch_set_backlight()
230 struct intel_connector *connector = to_intel_connector(conn_state->connector); in i9xx_set_backlight()
232 struct intel_panel *panel = &connector->panel; in i9xx_set_backlight()
235 drm_WARN_ON(display->drm, panel->backlight.pwm_level_max == 0); in i9xx_set_backlight()
237 if (panel->backlight.combination_mode) { in i9xx_set_backlight()
238 struct pci_dev *pdev = to_pci_dev(display->drm->dev); in i9xx_set_backlight()
241 lbpc = level * 0xfe / panel->backlight.pwm_level_max + 1; in i9xx_set_backlight()
259 struct intel_connector *connector = to_intel_connector(conn_state->connector); in vlv_set_backlight()
261 enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe; in vlv_set_backlight()
270 struct intel_connector *connector = to_intel_connector(conn_state->connector); in bxt_set_backlight()
272 struct intel_panel *panel = &connector->panel; in bxt_set_backlight()
274 intel_de_write(display, BXT_BLC_PWM_DUTY(panel->backlight.controller), level); in bxt_set_backlight()
279 struct intel_panel *panel = &to_intel_connector(conn_state->connector)->panel; in ext_pwm_set_backlight()
281 pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100); in ext_pwm_set_backlight()
282 pwm_apply_might_sleep(panel->backlight.pwm, &panel->backlight.pwm_state); in ext_pwm_set_backlight()
288 struct intel_connector *connector = to_intel_connector(conn_state->connector); in intel_panel_actually_set_backlight()
290 struct intel_panel *panel = &connector->panel; in intel_panel_actually_set_backlight()
292 drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s] set backlight level = %d\n", in intel_panel_actually_set_backlight()
293 connector->base.base.id, connector->base.name, level); in intel_panel_actually_set_backlight()
295 panel->backlight.funcs->set(conn_state, level); in intel_panel_actually_set_backlight()
298 /* set backlight brightness to level in range [0..max], assuming hw min is
304 struct intel_connector *connector = to_intel_connector(conn_state->connector); in intel_backlight_set_acpi()
306 struct intel_panel *panel = &connector->panel; in intel_backlight_set_acpi()
311 * connection_mutex isn't held across the entire backlight in intel_backlight_set_acpi()
315 if (!panel->backlight.present || !conn_state->crtc) in intel_backlight_set_acpi()
318 mutex_lock(&display->backlight.lock); in intel_backlight_set_acpi()
320 drm_WARN_ON(display->drm, panel->backlight.max == 0); in intel_backlight_set_acpi()
323 panel->backlight.level = hw_level; in intel_backlight_set_acpi()
325 if (panel->backlight.device) in intel_backlight_set_acpi()
326 panel->backlight.device->props.brightness = in intel_backlight_set_acpi()
328 panel->backlight.level, in intel_backlight_set_acpi()
329 panel->backlight.device->props.max_brightness); in intel_backlight_set_acpi()
331 if (panel->backlight.enabled) in intel_backlight_set_acpi()
334 mutex_unlock(&display->backlight.lock); in intel_backlight_set_acpi()
339 struct intel_connector *connector = to_intel_connector(old_conn_state->connector); in lpt_disable_backlight()
346 * Although we don't support or enable CPU PWM with LPT/SPT based in lpt_disable_backlight()
350 * This needs rework if we need to add support for CPU PWM on PCH split in lpt_disable_backlight()
355 drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s] CPU backlight was enabled, disabling\n", in lpt_disable_backlight()
356 connector->base.base.id, connector->base.name); in lpt_disable_backlight()
365 struct intel_connector *connector = to_intel_connector(old_conn_state->connector); in pch_disable_backlight()
382 struct intel_connector *connector = to_intel_connector(old_conn_state->connector); in i965_disable_backlight()
392 struct intel_connector *connector = to_intel_connector(old_conn_state->connector); in vlv_disable_backlight()
394 enum pipe pipe = to_intel_crtc(old_conn_state->crtc)->pipe; in vlv_disable_backlight()
403 struct intel_connector *connector = to_intel_connector(old_conn_state->connector); in bxt_disable_backlight()
405 struct intel_panel *panel = &connector->panel; in bxt_disable_backlight()
409 intel_de_rmw(display, BXT_BLC_PWM_CTL(panel->backlight.controller), in bxt_disable_backlight()
412 if (panel->backlight.controller == 1) in bxt_disable_backlight()
418 struct intel_connector *connector = to_intel_connector(old_conn_state->connector); in cnp_disable_backlight()
420 struct intel_panel *panel = &connector->panel; in cnp_disable_backlight()
424 intel_de_rmw(display, BXT_BLC_PWM_CTL(panel->backlight.controller), in cnp_disable_backlight()
430 struct intel_connector *connector = to_intel_connector(old_conn_state->connector); in ext_pwm_disable_backlight()
431 struct intel_panel *panel = &connector->panel; in ext_pwm_disable_backlight()
435 panel->backlight.pwm_state.enabled = false; in ext_pwm_disable_backlight()
436 pwm_apply_might_sleep(panel->backlight.pwm, &panel->backlight.pwm_state); in ext_pwm_disable_backlight()
441 struct intel_connector *connector = to_intel_connector(old_conn_state->connector); in intel_backlight_disable()
443 struct intel_panel *panel = &connector->panel; in intel_backlight_disable()
445 if (!panel->backlight.present) in intel_backlight_disable()
449 * Do not disable backlight on the vga_switcheroo path. When switching in intel_backlight_disable()
451 * backlight. This will leave the backlight on unnecessarily when in intel_backlight_disable()
454 if (display->drm->switch_power_state == DRM_SWITCH_POWER_CHANGING) { in intel_backlight_disable()
455 drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s] Skipping backlight disable on vga switch\n", in intel_backlight_disable()
456 connector->base.base.id, connector->base.name); in intel_backlight_disable()
460 mutex_lock(&display->backlight.lock); in intel_backlight_disable()
462 if (panel->backlight.device) in intel_backlight_disable()
463 panel->backlight.device->props.power = BACKLIGHT_POWER_OFF; in intel_backlight_disable()
464 panel->backlight.enabled = false; in intel_backlight_disable()
465 panel->backlight.funcs->disable(old_conn_state, 0); in intel_backlight_disable()
467 mutex_unlock(&display->backlight.lock); in intel_backlight_disable()
473 struct intel_connector *connector = to_intel_connector(conn_state->connector); in lpt_enable_backlight()
475 struct drm_i915_private *i915 = to_i915(connector->base.dev); in lpt_enable_backlight()
476 struct intel_panel *panel = &connector->panel; in lpt_enable_backlight()
481 drm_dbg_kms(display->drm, in lpt_enable_backlight()
482 "[CONNECTOR:%d:%s] PCH backlight already enabled\n", in lpt_enable_backlight()
483 connector->base.base.id, connector->base.name); in lpt_enable_backlight()
490 panel->backlight.alternate_pwm_increment ? in lpt_enable_backlight()
494 panel->backlight.alternate_pwm_increment ? in lpt_enable_backlight()
497 pch_ctl2 = panel->backlight.pwm_level_max << 16; in lpt_enable_backlight()
501 if (panel->backlight.active_low_pwm) in lpt_enable_backlight()
519 struct intel_connector *connector = to_intel_connector(conn_state->connector); in pch_enable_backlight()
521 struct intel_panel *panel = &connector->panel; in pch_enable_backlight()
522 enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; in pch_enable_backlight()
527 drm_dbg_kms(display->drm, in pch_enable_backlight()
528 "[CONNECTOR:%d:%s] CPU backlight already enabled\n", in pch_enable_backlight()
529 connector->base.base.id, connector->base.name); in pch_enable_backlight()
536 drm_dbg_kms(display->drm, in pch_enable_backlight()
537 "[CONNECTOR:%d:%s] PCH backlight already enabled\n", in pch_enable_backlight()
538 connector->base.base.id, connector->base.name); in pch_enable_backlight()
554 pch_ctl2 = panel->backlight.pwm_level_max << 16; in pch_enable_backlight()
558 if (panel->backlight.active_low_pwm) in pch_enable_backlight()
569 struct intel_connector *connector = to_intel_connector(conn_state->connector); in i9xx_enable_backlight()
571 struct intel_panel *panel = &connector->panel; in i9xx_enable_backlight()
576 drm_dbg_kms(display->drm, in i9xx_enable_backlight()
577 "[CONNECTOR:%d:%s] backlight already enabled\n", in i9xx_enable_backlight()
578 connector->base.base.id, connector->base.name); in i9xx_enable_backlight()
582 freq = panel->backlight.pwm_level_max; in i9xx_enable_backlight()
583 if (panel->backlight.combination_mode) in i9xx_enable_backlight()
587 if (panel->backlight.combination_mode) in i9xx_enable_backlight()
589 if (display->platform.pineview && panel->backlight.active_low_pwm) in i9xx_enable_backlight()
599 * Needed to enable backlight on some 855gm models. BLC_HIST_CTL is in i9xx_enable_backlight()
601 * that has backlight. in i9xx_enable_backlight()
610 struct intel_connector *connector = to_intel_connector(conn_state->connector); in i965_enable_backlight()
612 struct intel_panel *panel = &connector->panel; in i965_enable_backlight()
613 enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe; in i965_enable_backlight()
618 drm_dbg_kms(display->drm, in i965_enable_backlight()
619 "[CONNECTOR:%d:%s] backlight already enabled\n", in i965_enable_backlight()
620 connector->base.base.id, connector->base.name); in i965_enable_backlight()
625 freq = panel->backlight.pwm_level_max; in i965_enable_backlight()
626 if (panel->backlight.combination_mode) in i965_enable_backlight()
633 if (panel->backlight.combination_mode) in i965_enable_backlight()
635 if (panel->backlight.active_low_pwm) in i965_enable_backlight()
647 struct intel_connector *connector = to_intel_connector(conn_state->connector); in vlv_enable_backlight()
649 struct intel_panel *panel = &connector->panel; in vlv_enable_backlight()
650 enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; in vlv_enable_backlight()
655 drm_dbg_kms(display->drm, in vlv_enable_backlight()
656 "[CONNECTOR:%d:%s] backlight already enabled\n", in vlv_enable_backlight()
657 connector->base.base.id, connector->base.name); in vlv_enable_backlight()
662 ctl = panel->backlight.pwm_level_max << 16; in vlv_enable_backlight()
669 if (panel->backlight.active_low_pwm) in vlv_enable_backlight()
679 struct intel_connector *connector = to_intel_connector(conn_state->connector); in bxt_enable_backlight()
681 struct intel_panel *panel = &connector->panel; in bxt_enable_backlight()
682 enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; in bxt_enable_backlight()
686 if (panel->backlight.controller == 1) { in bxt_enable_backlight()
689 drm_dbg_kms(display->drm, in bxt_enable_backlight()
691 connector->base.base.id, connector->base.name); in bxt_enable_backlight()
697 if (panel->backlight.util_pin_active_low) in bxt_enable_backlight()
703 pwm_ctl = intel_de_read(display, BXT_BLC_PWM_CTL(panel->backlight.controller)); in bxt_enable_backlight()
705 drm_dbg_kms(display->drm, in bxt_enable_backlight()
706 "[CONNECTOR:%d:%s] backlight already enabled\n", in bxt_enable_backlight()
707 connector->base.base.id, connector->base.name); in bxt_enable_backlight()
709 intel_de_write(display, BXT_BLC_PWM_CTL(panel->backlight.controller), in bxt_enable_backlight()
713 intel_de_write(display, BXT_BLC_PWM_FREQ(panel->backlight.controller), in bxt_enable_backlight()
714 panel->backlight.pwm_level_max); in bxt_enable_backlight()
719 if (panel->backlight.active_low_pwm) in bxt_enable_backlight()
722 intel_de_write(display, BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl); in bxt_enable_backlight()
723 intel_de_posting_read(display, BXT_BLC_PWM_CTL(panel->backlight.controller)); in bxt_enable_backlight()
724 intel_de_write(display, BXT_BLC_PWM_CTL(panel->backlight.controller), in bxt_enable_backlight()
731 struct intel_connector *connector = to_intel_connector(conn_state->connector); in cnp_enable_backlight()
733 struct intel_panel *panel = &connector->panel; in cnp_enable_backlight()
736 pwm_ctl = intel_de_read(display, BXT_BLC_PWM_CTL(panel->backlight.controller)); in cnp_enable_backlight()
738 drm_dbg_kms(display->drm, "backlight already enabled\n"); in cnp_enable_backlight()
740 intel_de_write(display, BXT_BLC_PWM_CTL(panel->backlight.controller), in cnp_enable_backlight()
744 intel_de_write(display, BXT_BLC_PWM_FREQ(panel->backlight.controller), in cnp_enable_backlight()
745 panel->backlight.pwm_level_max); in cnp_enable_backlight()
750 if (panel->backlight.active_low_pwm) in cnp_enable_backlight()
753 intel_de_write(display, BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl); in cnp_enable_backlight()
754 intel_de_posting_read(display, BXT_BLC_PWM_CTL(panel->backlight.controller)); in cnp_enable_backlight()
755 intel_de_write(display, BXT_BLC_PWM_CTL(panel->backlight.controller), in cnp_enable_backlight()
762 struct intel_connector *connector = to_intel_connector(conn_state->connector); in ext_pwm_enable_backlight()
763 struct intel_panel *panel = &connector->panel; in ext_pwm_enable_backlight()
765 pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100); in ext_pwm_enable_backlight()
766 panel->backlight.pwm_state.enabled = true; in ext_pwm_enable_backlight()
767 pwm_apply_might_sleep(panel->backlight.pwm, &panel->backlight.pwm_state); in ext_pwm_enable_backlight()
773 struct intel_connector *connector = to_intel_connector(conn_state->connector); in __intel_backlight_enable()
774 struct intel_panel *panel = &connector->panel; in __intel_backlight_enable()
776 WARN_ON(panel->backlight.max == 0); in __intel_backlight_enable()
778 if (panel->backlight.level < panel->backlight.min) { in __intel_backlight_enable()
779 panel->backlight.level = panel->backlight.min; in __intel_backlight_enable()
780 if (panel->backlight.device) in __intel_backlight_enable()
781 panel->backlight.device->props.brightness = in __intel_backlight_enable()
783 panel->backlight.level, in __intel_backlight_enable()
784 panel->backlight.device->props.max_brightness); in __intel_backlight_enable()
787 panel->backlight.funcs->enable(crtc_state, conn_state, panel->backlight.level); in __intel_backlight_enable()
788 panel->backlight.enabled = true; in __intel_backlight_enable()
789 if (panel->backlight.device) in __intel_backlight_enable()
790 panel->backlight.device->props.power = BACKLIGHT_POWER_ON; in __intel_backlight_enable()
796 struct intel_connector *connector = to_intel_connector(conn_state->connector); in intel_backlight_enable()
798 struct intel_panel *panel = &connector->panel; in intel_backlight_enable()
799 enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; in intel_backlight_enable()
801 if (!panel->backlight.present) in intel_backlight_enable()
804 drm_dbg_kms(display->drm, "pipe %c\n", pipe_name(pipe)); in intel_backlight_enable()
806 mutex_lock(&display->backlight.lock); in intel_backlight_enable()
810 mutex_unlock(&display->backlight.lock); in intel_backlight_enable()
817 struct intel_panel *panel = &connector->panel; in intel_panel_get_backlight()
820 mutex_lock(&display->backlight.lock); in intel_panel_get_backlight()
822 if (panel->backlight.enabled) in intel_panel_get_backlight()
823 val = panel->backlight.funcs->get(connector, intel_connector_get_pipe(connector)); in intel_panel_get_backlight()
825 mutex_unlock(&display->backlight.lock); in intel_panel_get_backlight()
827 drm_dbg_kms(display->drm, "get backlight PWM = %d\n", val); in intel_panel_get_backlight()
835 struct intel_panel *panel = &connector->panel; in scale_user_to_hw()
838 panel->backlight.min, panel->backlight.max); in scale_user_to_hw()
841 /* set backlight brightness to level in range [0..max], scaling wrt hw min */
845 struct intel_connector *connector = to_intel_connector(conn_state->connector); in intel_panel_set_backlight()
847 struct intel_panel *panel = &connector->panel; in intel_panel_set_backlight()
850 if (!panel->backlight.present) in intel_panel_set_backlight()
853 mutex_lock(&display->backlight.lock); in intel_panel_set_backlight()
855 drm_WARN_ON(display->drm, panel->backlight.max == 0); in intel_panel_set_backlight()
858 panel->backlight.level = hw_level; in intel_panel_set_backlight()
860 if (panel->backlight.enabled) in intel_panel_set_backlight()
863 mutex_unlock(&display->backlight.lock); in intel_panel_set_backlight()
870 struct intel_panel *panel = &connector->panel; in intel_backlight_device_update_status()
872 drm_modeset_lock(&display->drm->mode_config.connection_mutex, NULL); in intel_backlight_device_update_status()
874 drm_dbg_kms(display->drm, "updating intel_backlight, brightness=%d/%d\n", in intel_backlight_device_update_status()
875 bd->props.brightness, bd->props.max_brightness); in intel_backlight_device_update_status()
876 intel_panel_set_backlight(connector->base.state, bd->props.brightness, in intel_backlight_device_update_status()
877 bd->props.max_brightness); in intel_backlight_device_update_status()
880 * Allow flipping bl_power as a sub-state of enabled. Sadly the in intel_backlight_device_update_status()
881 * backlight class device does not make it easy to differentiate in intel_backlight_device_update_status()
885 if (panel->backlight.enabled) { in intel_backlight_device_update_status()
886 if (panel->backlight.power) { in intel_backlight_device_update_status()
887 bool enable = bd->props.power == BACKLIGHT_POWER_ON && in intel_backlight_device_update_status()
888 bd->props.brightness != 0; in intel_backlight_device_update_status()
889 panel->backlight.power(connector, enable); in intel_backlight_device_update_status()
892 bd->props.power = BACKLIGHT_POWER_OFF; in intel_backlight_device_update_status()
895 drm_modeset_unlock(&display->drm->mode_config.connection_mutex); in intel_backlight_device_update_status()
904 struct drm_i915_private *i915 = to_i915(connector->base.dev); in intel_backlight_device_get_brightness()
908 with_intel_runtime_pm(&i915->runtime_pm, wakeref) { in intel_backlight_device_get_brightness()
911 drm_modeset_lock(&display->drm->mode_config.connection_mutex, NULL); in intel_backlight_device_get_brightness()
915 hw_level, bd->props.max_brightness); in intel_backlight_device_get_brightness()
917 drm_modeset_unlock(&display->drm->mode_config.connection_mutex); in intel_backlight_device_get_brightness()
931 struct intel_panel *panel = &connector->panel; in intel_backlight_device_register()
937 if (WARN_ON(panel->backlight.device)) in intel_backlight_device_register()
938 return -ENODEV; in intel_backlight_device_register()
940 if (!panel->backlight.present) in intel_backlight_device_register()
943 WARN_ON(panel->backlight.max == 0); in intel_backlight_device_register()
946 drm_info(display->drm, in intel_backlight_device_register()
955 * Note: Everything should work even if the backlight device max in intel_backlight_device_register()
958 props.max_brightness = panel->backlight.max; in intel_backlight_device_register()
960 panel->backlight.level, in intel_backlight_device_register()
963 if (panel->backlight.enabled) in intel_backlight_device_register()
970 return -ENOMEM; in intel_backlight_device_register()
974 put_device(&bd->dev); in intel_backlight_device_register()
977 * prevents registration of multiple backlight devices in the in intel_backlight_device_register()
979 * compatibility. Use unique names for subsequent backlight devices as a in intel_backlight_device_register()
983 name = kasprintf(GFP_KERNEL, "card%d-%s-backlight", in intel_backlight_device_register()
984 display->drm->primary->index, in intel_backlight_device_register()
985 connector->base.name); in intel_backlight_device_register()
987 return -ENOMEM; in intel_backlight_device_register()
989 bd = backlight_device_register(name, connector->base.kdev, connector, in intel_backlight_device_register()
993 drm_err(display->drm, in intel_backlight_device_register()
994 "[CONNECTOR:%d:%s] backlight device %s register failed: %ld\n", in intel_backlight_device_register()
995 connector->base.base.id, connector->base.name, name, PTR_ERR(bd)); in intel_backlight_device_register()
1000 panel->backlight.device = bd; in intel_backlight_device_register()
1002 drm_dbg_kms(display->drm, in intel_backlight_device_register()
1003 "[CONNECTOR:%d:%s] backlight device %s registered\n", in intel_backlight_device_register()
1004 connector->base.base.id, connector->base.name, name); in intel_backlight_device_register()
1014 struct intel_panel *panel = &connector->panel; in intel_backlight_device_unregister()
1016 if (panel->backlight.device) { in intel_backlight_device_unregister()
1017 backlight_device_unregister(panel->backlight.device); in intel_backlight_device_unregister()
1018 panel->backlight.device = NULL; in intel_backlight_device_unregister()
1024 * CNP: PWM clock frequency is 19.2 MHz or 24 MHz.
1025 * PWM increment = 1
1031 return DIV_ROUND_CLOSEST(KHz(DISPLAY_RUNTIME_INFO(display)->rawclk_freq), in cnp_hz_to_pwm()
1036 * BXT: PWM clock frequency = 19.2 MHz.
1044 * SPT: This value represents the period of the PWM stream in clock periods
1046 * SCHICKEN_1 bit 0). PWM clock is 24 MHz.
1050 struct intel_panel *panel = &connector->panel; in spt_hz_to_pwm()
1053 if (panel->backlight.alternate_pwm_increment) in spt_hz_to_pwm()
1062 * LPT: This value represents the period of the PWM stream in clock periods
1068 struct drm_i915_private *i915 = to_i915(connector->base.dev); in lpt_hz_to_pwm()
1069 struct intel_panel *panel = &connector->panel; in lpt_hz_to_pwm()
1072 if (panel->backlight.alternate_pwm_increment) in lpt_hz_to_pwm()
1086 * ILK/SNB/IVB: This value represents the period of the PWM stream in PCH
1093 return DIV_ROUND_CLOSEST(KHz(DISPLAY_RUNTIME_INFO(display)->rawclk_freq), in pch_hz_to_pwm()
1099 * clock frequency/32) in total for a complete cycle of modulated backlight
1110 if (display->platform.pineview) in i9xx_hz_to_pwm()
1111 clock = KHz(DISPLAY_RUNTIME_INFO(display)->rawclk_freq); in i9xx_hz_to_pwm()
1113 clock = KHz(display->cdclk.hw.cdclk); in i9xx_hz_to_pwm()
1119 * Gen4: This value represents the period of the PWM stream in display core
1128 if (display->platform.g4x) in i965_hz_to_pwm()
1129 clock = KHz(DISPLAY_RUNTIME_INFO(display)->rawclk_freq); in i965_hz_to_pwm()
1131 clock = KHz(display->cdclk.hw.cdclk); in i965_hz_to_pwm()
1137 * VLV: This value represents the period of the PWM stream in display core
1147 if (display->platform.cherryview) in vlv_hz_to_pwm()
1153 clock = KHz(DISPLAY_RUNTIME_INFO(display)->rawclk_freq); in vlv_hz_to_pwm()
1163 u16 pwm_freq_hz = connector->panel.vbt.backlight.pwm_freq_hz; in get_vbt_pwm_freq()
1166 drm_dbg_kms(display->drm, in get_vbt_pwm_freq()
1167 "VBT defined backlight frequency %u Hz\n", in get_vbt_pwm_freq()
1171 drm_dbg_kms(display->drm, in get_vbt_pwm_freq()
1172 "default backlight frequency %u Hz\n", in get_vbt_pwm_freq()
1182 struct intel_panel *panel = &connector->panel; in get_backlight_max_vbt()
1184 u32 pwm; in get_backlight_max_vbt() local
1186 if (!panel->backlight.pwm_funcs->hz_to_pwm) { in get_backlight_max_vbt()
1187 drm_dbg_kms(display->drm, in get_backlight_max_vbt()
1188 "backlight frequency conversion not supported\n"); in get_backlight_max_vbt()
1192 pwm = panel->backlight.pwm_funcs->hz_to_pwm(connector, pwm_freq_hz); in get_backlight_max_vbt()
1193 if (!pwm) { in get_backlight_max_vbt()
1194 drm_dbg_kms(display->drm, in get_backlight_max_vbt()
1195 "backlight frequency conversion failed\n"); in get_backlight_max_vbt()
1199 return pwm; in get_backlight_max_vbt()
1208 struct intel_panel *panel = &connector->panel; in get_backlight_min_vbt()
1211 drm_WARN_ON(display->drm, panel->backlight.pwm_level_max == 0); in get_backlight_min_vbt()
1220 min = clamp_t(int, connector->panel.vbt.backlight.min_brightness, 0, 64); in get_backlight_min_vbt()
1221 if (min != connector->panel.vbt.backlight.min_brightness) { in get_backlight_min_vbt()
1222 drm_dbg_kms(display->drm, in get_backlight_min_vbt()
1223 "clamping VBT min backlight %d/255 to %d/255\n", in get_backlight_min_vbt()
1224 connector->panel.vbt.backlight.min_brightness, min); in get_backlight_min_vbt()
1228 return scale(min, 0, 255, 0, panel->backlight.pwm_level_max); in get_backlight_min_vbt()
1234 struct drm_i915_private *i915 = to_i915(connector->base.dev); in lpt_setup_backlight()
1235 struct intel_panel *panel = &connector->panel; in lpt_setup_backlight()
1243 panel->backlight.alternate_pwm_increment = alt; in lpt_setup_backlight()
1246 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; in lpt_setup_backlight()
1249 panel->backlight.pwm_level_max = pch_ctl2 >> 16; in lpt_setup_backlight()
1253 if (!panel->backlight.pwm_level_max) in lpt_setup_backlight()
1254 panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); in lpt_setup_backlight()
1256 if (!panel->backlight.pwm_level_max) in lpt_setup_backlight()
1257 return -ENODEV; in lpt_setup_backlight()
1259 panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); in lpt_setup_backlight()
1261 panel->backlight.pwm_enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE; in lpt_setup_backlight()
1263 cpu_mode = panel->backlight.pwm_enabled && HAS_PCH_LPT(i915) && in lpt_setup_backlight()
1270 drm_dbg_kms(display->drm, in lpt_setup_backlight()
1271 "CPU backlight register was enabled, switching to PCH override\n"); in lpt_setup_backlight()
1273 /* Write converted CPU PWM value to PCH override register */ in lpt_setup_backlight()
1274 lpt_set_backlight(connector->base.state, val); in lpt_setup_backlight()
1282 drm_dbg_kms(display->drm, in lpt_setup_backlight()
1283 "[CONNECTOR:%d:%s] Using native PCH PWM for backlight control\n", in lpt_setup_backlight()
1284 connector->base.base.id, connector->base.name); in lpt_setup_backlight()
1292 struct intel_panel *panel = &connector->panel; in pch_setup_backlight()
1296 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; in pch_setup_backlight()
1299 panel->backlight.pwm_level_max = pch_ctl2 >> 16; in pch_setup_backlight()
1301 if (!panel->backlight.pwm_level_max) in pch_setup_backlight()
1302 panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); in pch_setup_backlight()
1304 if (!panel->backlight.pwm_level_max) in pch_setup_backlight()
1305 return -ENODEV; in pch_setup_backlight()
1307 panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); in pch_setup_backlight()
1310 panel->backlight.pwm_enabled = (cpu_ctl2 & BLM_PWM_ENABLE) && in pch_setup_backlight()
1313 drm_dbg_kms(display->drm, in pch_setup_backlight()
1314 "[CONNECTOR:%d:%s] Using native PCH PWM for backlight control\n", in pch_setup_backlight()
1315 connector->base.base.id, connector->base.name); in pch_setup_backlight()
1323 struct intel_panel *panel = &connector->panel; in i9xx_setup_backlight()
1328 if (DISPLAY_VER(display) == 2 || display->platform.i915gm || display->platform.i945gm) in i9xx_setup_backlight()
1329 panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE; in i9xx_setup_backlight()
1331 if (display->platform.pineview) in i9xx_setup_backlight()
1332 panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV; in i9xx_setup_backlight()
1334 panel->backlight.pwm_level_max = ctl >> 17; in i9xx_setup_backlight()
1336 if (!panel->backlight.pwm_level_max) { in i9xx_setup_backlight()
1337 panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); in i9xx_setup_backlight()
1338 panel->backlight.pwm_level_max >>= 1; in i9xx_setup_backlight()
1341 if (!panel->backlight.pwm_level_max) in i9xx_setup_backlight()
1342 return -ENODEV; in i9xx_setup_backlight()
1344 if (panel->backlight.combination_mode) in i9xx_setup_backlight()
1345 panel->backlight.pwm_level_max *= 0xff; in i9xx_setup_backlight()
1347 panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); in i9xx_setup_backlight()
1351 val = clamp(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max); in i9xx_setup_backlight()
1353 panel->backlight.pwm_enabled = val != 0; in i9xx_setup_backlight()
1355 drm_dbg_kms(display->drm, in i9xx_setup_backlight()
1356 "[CONNECTOR:%d:%s] Using native PWM for backlight control\n", in i9xx_setup_backlight()
1357 connector->base.base.id, connector->base.name); in i9xx_setup_backlight()
1365 struct intel_panel *panel = &connector->panel; in i965_setup_backlight()
1369 panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE; in i965_setup_backlight()
1370 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; in i965_setup_backlight()
1373 panel->backlight.pwm_level_max = ctl >> 16; in i965_setup_backlight()
1375 if (!panel->backlight.pwm_level_max) in i965_setup_backlight()
1376 panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); in i965_setup_backlight()
1378 if (!panel->backlight.pwm_level_max) in i965_setup_backlight()
1379 return -ENODEV; in i965_setup_backlight()
1381 if (panel->backlight.combination_mode) in i965_setup_backlight()
1382 panel->backlight.pwm_level_max *= 0xff; in i965_setup_backlight()
1384 panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); in i965_setup_backlight()
1386 panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE; in i965_setup_backlight()
1388 drm_dbg_kms(display->drm, in i965_setup_backlight()
1389 "[CONNECTOR:%d:%s] Using native PWM for backlight control\n", in i965_setup_backlight()
1390 connector->base.base.id, connector->base.name); in i965_setup_backlight()
1398 struct intel_panel *panel = &connector->panel; in vlv_setup_backlight()
1401 if (drm_WARN_ON(display->drm, pipe != PIPE_A && pipe != PIPE_B)) in vlv_setup_backlight()
1402 return -ENODEV; in vlv_setup_backlight()
1405 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; in vlv_setup_backlight()
1408 panel->backlight.pwm_level_max = ctl >> 16; in vlv_setup_backlight()
1410 if (!panel->backlight.pwm_level_max) in vlv_setup_backlight()
1411 panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); in vlv_setup_backlight()
1413 if (!panel->backlight.pwm_level_max) in vlv_setup_backlight()
1414 return -ENODEV; in vlv_setup_backlight()
1416 panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); in vlv_setup_backlight()
1418 panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE; in vlv_setup_backlight()
1420 drm_dbg_kms(display->drm, in vlv_setup_backlight()
1421 "[CONNECTOR:%d:%s] Using native PWM for backlight control (on pipe %c)\n", in vlv_setup_backlight()
1422 connector->base.base.id, connector->base.name, pipe_name(pipe)); in vlv_setup_backlight()
1431 struct intel_panel *panel = &connector->panel; in bxt_setup_backlight()
1434 panel->backlight.controller = connector->panel.vbt.backlight.controller; in bxt_setup_backlight()
1437 BXT_BLC_PWM_CTL(panel->backlight.controller)); in bxt_setup_backlight()
1440 if (panel->backlight.controller == 1) { in bxt_setup_backlight()
1442 panel->backlight.util_pin_active_low = in bxt_setup_backlight()
1446 panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; in bxt_setup_backlight()
1447 panel->backlight.pwm_level_max = in bxt_setup_backlight()
1448 intel_de_read(display, BXT_BLC_PWM_FREQ(panel->backlight.controller)); in bxt_setup_backlight()
1450 if (!panel->backlight.pwm_level_max) in bxt_setup_backlight()
1451 panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); in bxt_setup_backlight()
1453 if (!panel->backlight.pwm_level_max) in bxt_setup_backlight()
1454 return -ENODEV; in bxt_setup_backlight()
1456 panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); in bxt_setup_backlight()
1458 panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; in bxt_setup_backlight()
1460 drm_dbg_kms(display->drm, in bxt_setup_backlight()
1461 "[CONNECTOR:%d:%s] Using native PWM for backlight control (controller=%d)\n", in bxt_setup_backlight()
1462 connector->base.base.id, connector->base.name, in bxt_setup_backlight()
1463 panel->backlight.controller); in bxt_setup_backlight()
1470 struct drm_i915_private *i915 = to_i915(display->drm); in cnp_num_backlight_controllers()
1486 struct drm_i915_private *i915 = to_i915(display->drm); in cnp_backlight_controller_is_valid()
1503 struct intel_panel *panel = &connector->panel; in cnp_setup_backlight()
1507 * CNP has the BXT implementation of backlight, but with only one in cnp_setup_backlight()
1510 panel->backlight.controller = connector->panel.vbt.backlight.controller; in cnp_setup_backlight()
1511 if (!cnp_backlight_controller_is_valid(display, panel->backlight.controller)) { in cnp_setup_backlight()
1512 drm_dbg_kms(display->drm, in cnp_setup_backlight()
1513 "[CONNECTOR:%d:%s] Invalid backlight controller %d, assuming 0\n", in cnp_setup_backlight()
1514 connector->base.base.id, connector->base.name, in cnp_setup_backlight()
1515 panel->backlight.controller); in cnp_setup_backlight()
1516 panel->backlight.controller = 0; in cnp_setup_backlight()
1520 BXT_BLC_PWM_CTL(panel->backlight.controller)); in cnp_setup_backlight()
1522 panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; in cnp_setup_backlight()
1523 panel->backlight.pwm_level_max = in cnp_setup_backlight()
1524 intel_de_read(display, BXT_BLC_PWM_FREQ(panel->backlight.controller)); in cnp_setup_backlight()
1526 if (!panel->backlight.pwm_level_max) in cnp_setup_backlight()
1527 panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); in cnp_setup_backlight()
1529 if (!panel->backlight.pwm_level_max) in cnp_setup_backlight()
1530 return -ENODEV; in cnp_setup_backlight()
1532 panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); in cnp_setup_backlight()
1534 panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; in cnp_setup_backlight()
1536 drm_dbg_kms(display->drm, in cnp_setup_backlight()
1537 "[CONNECTOR:%d:%s] Using native PCH PWM for backlight control (controller=%d)\n", in cnp_setup_backlight()
1538 connector->base.base.id, connector->base.name, in cnp_setup_backlight()
1539 panel->backlight.controller); in cnp_setup_backlight()
1548 struct intel_panel *panel = &connector->panel; in ext_pwm_setup_backlight()
1552 /* Get the right PWM chip for DSI backlight according to VBT */ in ext_pwm_setup_backlight()
1553 if (connector->panel.vbt.dsi.config->pwm_blc == PPS_BLC_PMIC) { in ext_pwm_setup_backlight()
1554 panel->backlight.pwm = pwm_get(display->drm->dev, in ext_pwm_setup_backlight()
1558 panel->backlight.pwm = pwm_get(display->drm->dev, in ext_pwm_setup_backlight()
1563 if (IS_ERR(panel->backlight.pwm)) { in ext_pwm_setup_backlight()
1564 drm_err(display->drm, in ext_pwm_setup_backlight()
1565 "[CONNECTOR:%d:%s] Failed to get the %s PWM chip\n", in ext_pwm_setup_backlight()
1566 connector->base.base.id, connector->base.name, desc); in ext_pwm_setup_backlight()
1567 panel->backlight.pwm = NULL; in ext_pwm_setup_backlight()
1568 return -ENODEV; in ext_pwm_setup_backlight()
1571 panel->backlight.pwm_level_max = 100; /* 100% */ in ext_pwm_setup_backlight()
1572 panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); in ext_pwm_setup_backlight()
1574 if (pwm_is_enabled(panel->backlight.pwm)) { in ext_pwm_setup_backlight()
1575 /* PWM is already enabled, use existing settings */ in ext_pwm_setup_backlight()
1576 pwm_get_state(panel->backlight.pwm, &panel->backlight.pwm_state); in ext_pwm_setup_backlight()
1578 level = pwm_get_relative_duty_cycle(&panel->backlight.pwm_state, in ext_pwm_setup_backlight()
1581 panel->backlight.pwm_enabled = true; in ext_pwm_setup_backlight()
1583 drm_dbg_kms(display->drm, in ext_pwm_setup_backlight()
1584 "[CONNECTOR:%d:%s] PWM already enabled at freq %ld, VBT freq %d, level %d\n", in ext_pwm_setup_backlight()
1585 connector->base.base.id, connector->base.name, in ext_pwm_setup_backlight()
1586 NSEC_PER_SEC / (unsigned long)panel->backlight.pwm_state.period, in ext_pwm_setup_backlight()
1590 panel->backlight.pwm_state.period = in ext_pwm_setup_backlight()
1594 drm_dbg_kms(display->drm, in ext_pwm_setup_backlight()
1595 "[CONNECTOR:%d:%s] Using %s PWM for backlight control\n", in ext_pwm_setup_backlight()
1596 connector->base.base.id, connector->base.name, desc); in ext_pwm_setup_backlight()
1603 struct intel_connector *connector = to_intel_connector(conn_state->connector); in intel_pwm_set_backlight()
1604 struct intel_panel *panel = &connector->panel; in intel_pwm_set_backlight()
1606 panel->backlight.pwm_funcs->set(conn_state, in intel_pwm_set_backlight()
1612 struct intel_panel *panel = &connector->panel; in intel_pwm_get_backlight()
1615 panel->backlight.pwm_funcs->get(connector, pipe)); in intel_pwm_get_backlight()
1621 struct intel_connector *connector = to_intel_connector(conn_state->connector); in intel_pwm_enable_backlight()
1622 struct intel_panel *panel = &connector->panel; in intel_pwm_enable_backlight()
1624 panel->backlight.pwm_funcs->enable(crtc_state, conn_state, in intel_pwm_enable_backlight()
1630 struct intel_connector *connector = to_intel_connector(conn_state->connector); in intel_pwm_disable_backlight()
1631 struct intel_panel *panel = &connector->panel; in intel_pwm_disable_backlight()
1633 panel->backlight.pwm_funcs->disable(conn_state, in intel_pwm_disable_backlight()
1639 struct intel_panel *panel = &connector->panel; in intel_pwm_setup_backlight()
1642 ret = panel->backlight.pwm_funcs->setup(connector, pipe); in intel_pwm_setup_backlight()
1646 panel->backlight.min = panel->backlight.pwm_level_min; in intel_pwm_setup_backlight()
1647 panel->backlight.max = panel->backlight.pwm_level_max; in intel_pwm_setup_backlight()
1648 panel->backlight.level = intel_pwm_get_backlight(connector, pipe); in intel_pwm_setup_backlight()
1649 panel->backlight.enabled = panel->backlight.pwm_enabled; in intel_pwm_setup_backlight()
1659 struct intel_connector *connector = to_intel_connector(conn_state->connector); in intel_backlight_update()
1661 struct intel_panel *panel = &connector->panel; in intel_backlight_update()
1663 if (!panel->backlight.present) in intel_backlight_update()
1666 mutex_lock(&display->backlight.lock); in intel_backlight_update()
1667 if (!panel->backlight.enabled) in intel_backlight_update()
1670 mutex_unlock(&display->backlight.lock); in intel_backlight_update()
1676 struct intel_panel *panel = &connector->panel; in intel_backlight_setup()
1679 if (!connector->panel.vbt.backlight.present) { in intel_backlight_setup()
1681 drm_dbg_kms(display->drm, in intel_backlight_setup()
1682 "[CONNECTOR:%d:%s] no backlight present per VBT, but present per quirk\n", in intel_backlight_setup()
1683 connector->base.base.id, connector->base.name); in intel_backlight_setup()
1685 drm_dbg_kms(display->drm, in intel_backlight_setup()
1686 "[CONNECTOR:%d:%s] no backlight present per VBT\n", in intel_backlight_setup()
1687 connector->base.base.id, connector->base.name); in intel_backlight_setup()
1693 if (drm_WARN_ON(display->drm, !panel->backlight.funcs)) in intel_backlight_setup()
1694 return -ENODEV; in intel_backlight_setup()
1697 mutex_lock(&display->backlight.lock); in intel_backlight_setup()
1698 ret = panel->backlight.funcs->setup(connector, pipe); in intel_backlight_setup()
1699 mutex_unlock(&display->backlight.lock); in intel_backlight_setup()
1702 drm_dbg_kms(display->drm, in intel_backlight_setup()
1703 "[CONNECTOR:%d:%s] failed to setup backlight\n", in intel_backlight_setup()
1704 connector->base.base.id, connector->base.name); in intel_backlight_setup()
1708 panel->backlight.present = true; in intel_backlight_setup()
1710 drm_dbg_kms(display->drm, in intel_backlight_setup()
1711 "[CONNECTOR:%d:%s] backlight initialized, %s, brightness %u/%u\n", in intel_backlight_setup()
1712 connector->base.base.id, connector->base.name, in intel_backlight_setup()
1713 str_enabled_disabled(panel->backlight.enabled), in intel_backlight_setup()
1714 panel->backlight.level, panel->backlight.max); in intel_backlight_setup()
1721 /* dispose of the pwm */ in intel_backlight_destroy()
1722 if (panel->backlight.pwm) in intel_backlight_destroy()
1723 pwm_put(panel->backlight.pwm); in intel_backlight_destroy()
1725 panel->backlight.present = false; in intel_backlight_destroy()
1816 /* Set up chip specific backlight functions */
1822 struct drm_i915_private *i915 = to_i915(connector->base.dev); in intel_backlight_init_funcs()
1824 if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI && in intel_backlight_init_funcs()
1828 if (display->platform.geminilake || display->platform.broxton) { in intel_backlight_init_funcs()
1829 panel->backlight.pwm_funcs = &bxt_pwm_funcs; in intel_backlight_init_funcs()
1831 panel->backlight.pwm_funcs = &cnp_pwm_funcs; in intel_backlight_init_funcs()
1834 panel->backlight.pwm_funcs = &lpt_pwm_funcs; in intel_backlight_init_funcs()
1836 panel->backlight.pwm_funcs = &spt_pwm_funcs; in intel_backlight_init_funcs()
1838 panel->backlight.pwm_funcs = &pch_pwm_funcs; in intel_backlight_init_funcs()
1839 } else if (display->platform.valleyview || display->platform.cherryview) { in intel_backlight_init_funcs()
1840 if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI) { in intel_backlight_init_funcs()
1841 panel->backlight.pwm_funcs = &ext_pwm_funcs; in intel_backlight_init_funcs()
1843 panel->backlight.pwm_funcs = &vlv_pwm_funcs; in intel_backlight_init_funcs()
1846 panel->backlight.pwm_funcs = &i965_pwm_funcs; in intel_backlight_init_funcs()
1848 panel->backlight.pwm_funcs = &i9xx_pwm_funcs; in intel_backlight_init_funcs()
1851 if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) { in intel_backlight_init_funcs()
1856 connector->panel.backlight.power = intel_pps_backlight_power; in intel_backlight_init_funcs()
1859 /* We're using a standard PWM backlight interface */ in intel_backlight_init_funcs()
1860 panel->backlight.funcs = &pwm_bl_funcs; in intel_backlight_init_funcs()