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drm/i915: panel: Use intel_panel_compute_brightness() from pwm_setup_backlight() 

Use intel_panel_compute_brightness() from pwm_setup_backlight() so that
we correctly take i915_modparams.invert_brightness and/or
QUIRK_INVERT_BRIGHTNESS into account when setting + getting the initial
brightness value.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200221172927.510027-1-hdegoede@redhat.com
This commit is contained in:
Hans de Goede 2020-02-21 18:29:26 +01:00
parent 8e9f84cf5c
commit d59b1d1bdf
1 changed files with 11 additions and 7 deletions
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16
drivers/gpu/drm/i915/display/intel_panel.c
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@ -1882,6 +1882,7 @@ static int pwm_setup_backlight(struct intel_connector *connector,
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_panel *panel = &connector->panel;
const char *desc;
u32 level, ns;
int retval;
/* Get the right PWM chip for DSI backlight according to VBT */
@ -1906,8 +1907,12 @@ static int pwm_setup_backlight(struct intel_connector *connector,
*/
pwm_apply_args(panel->backlight.pwm);
retval = pwm_config(panel->backlight.pwm, CRC_PMIC_PWM_PERIOD_NS,
CRC_PMIC_PWM_PERIOD_NS);
panel->backlight.min = 0; /* 0% */
panel->backlight.max = 100; /* 100% */
level = intel_panel_compute_brightness(connector, 100);
ns = DIV_ROUND_UP(level * CRC_PMIC_PWM_PERIOD_NS, 100);
retval = pwm_config(panel->backlight.pwm, ns, CRC_PMIC_PWM_PERIOD_NS);
if (retval < 0) {
drm_err(&dev_priv->drm, "Failed to configure the pwm chip\n");
pwm_put(panel->backlight.pwm);
@ -1915,11 +1920,10 @@ static int pwm_setup_backlight(struct intel_connector *connector,
return retval;
}
panel->backlight.min = 0; /* 0% */
panel->backlight.max = 100; /* 100% */
panel->backlight.level = DIV_ROUND_UP(
pwm_get_duty_cycle(panel->backlight.pwm) * 100,
level = DIV_ROUND_UP(pwm_get_duty_cycle(panel->backlight.pwm) * 100,
CRC_PMIC_PWM_PERIOD_NS);
panel->backlight.level =
intel_panel_compute_brightness(connector, level);
panel->backlight.enabled = panel->backlight.level != 0;
drm_info(&dev_priv->drm, "Using %s PWM for LCD backlight control\n",