BLM_PCH_PWM_ENABLE
panel->backlight.pwm_enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE;
(pch_ctl1 & BLM_PCH_PWM_ENABLE);
intel_de_rmw(display, BLC_PWM_PCH_CTL1, BLM_PCH_PWM_ENABLE, 0);
intel_de_rmw(display, BLC_PWM_PCH_CTL1, BLM_PCH_PWM_ENABLE, 0);
if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
intel_de_write(display, BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
intel_de_write(display, BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
intel_de_read(display, BLC_PWM_PCH_CTL1) & BLM_PCH_PWM_ENABLE,