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| author | Hans de Goede <hdegoede@redhat.com> | 2020-09-03 14:23:34 +0300 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2020-09-06 16:38:05 +0300 |
| commit | 27a79cbc17e39b34f2fa9d3829e39ca50418c7f2 (patch) | |
| tree | 19d249984f31b057d4a73f6913bb2946d8dcfc65 /drivers/gpu/drm/i915/display/intel_panel.c | |
| parent | c86b155da7d0700032eed00d37ee02310eb8a0b7 (diff) | |
| download | linux-27a79cbc17e39b34f2fa9d3829e39ca50418c7f2.tar.xz | |
drm/i915: panel: Add get_vbt_pwm_freq() helper
Factor the code which checks and drm_dbg_kms-s the VBT PWM frequency
out of get_backlight_max_vbt().
This is a preparation patch for honering the VBT PWM frequency for
devices which use an external PWM controller (devices using
pwm_setup_backlight()).
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200903112337.4113-15-hdegoede@redhat.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_panel.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_panel.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c index aaed9eb3b56c..0cbb73baabf1 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.c +++ b/drivers/gpu/drm/i915/display/intel_panel.c @@ -1543,18 +1543,9 @@ static u32 vlv_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); } -static u32 get_backlight_max_vbt(struct intel_connector *connector) +static u16 get_vbt_pwm_freq(struct drm_i915_private *dev_priv) { - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; u16 pwm_freq_hz = dev_priv->vbt.backlight.pwm_freq_hz; - u32 pwm; - - if (!panel->backlight.hz_to_pwm) { - drm_dbg_kms(&dev_priv->drm, - "backlight frequency conversion not supported\n"); - return 0; - } if (pwm_freq_hz) { drm_dbg_kms(&dev_priv->drm, @@ -1567,6 +1558,22 @@ static u32 get_backlight_max_vbt(struct intel_connector *connector) pwm_freq_hz); } + return pwm_freq_hz; +} + +static u32 get_backlight_max_vbt(struct intel_connector *connector) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + u16 pwm_freq_hz = get_vbt_pwm_freq(dev_priv); + u32 pwm; + + if (!panel->backlight.hz_to_pwm) { + drm_dbg_kms(&dev_priv->drm, + "backlight frequency conversion not supported\n"); + return 0; + } + pwm = panel->backlight.hz_to_pwm(connector, pwm_freq_hz); if (!pwm) { drm_dbg_kms(&dev_priv->drm, |