diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_panel.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index a24df35e11e7..2d1696386b0d 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -1264,6 +1264,14 @@ static void intel_backlight_device_unregister(struct intel_connector *connector) #endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */ /* + * BXT: PWM clock frequency = 19.2 MHz. + */ +static u32 bxt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) +{ + return KHz(19200) / pwm_freq_hz; +} + +/* * SPT: This value represents the period of the PWM stream in clock periods * multiplied by 16 (default increment) or 128 (alternate increment selected in * SCHICKEN_1 bit 0). PWM clock is 24 MHz. @@ -1750,6 +1758,7 @@ intel_panel_init_backlight_funcs(struct intel_panel *panel) panel->backlight.disable = bxt_disable_backlight; panel->backlight.set = bxt_set_backlight; panel->backlight.get = bxt_get_backlight; + panel->backlight.hz_to_pwm = bxt_hz_to_pwm; } else if (HAS_PCH_LPT(dev) || HAS_PCH_SPT(dev)) { panel->backlight.setup = lpt_setup_backlight; panel->backlight.enable = lpt_enable_backlight; |