From d59b1d1bdffa62291958d14f4e1ea69bb65958a6 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Fri, 21 Feb 2020 18:29:26 +0100
Subject: [PATCH] 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
---
drivers/gpu/drm/i915/display/intel_panel.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
index 5aead622019cc..276f438708026 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.c
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -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,
- CRC_PMIC_PWM_PERIOD_NS);
+ 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",
--
GitLab