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Don't try to write the read-only PP_STATUS register. 

Also, don't bother reading the PP_CONTROL register to try to get LVDS status --
that's what PP_STATUS is for.
This commit is contained in:
Eric Anholt 2006-12-01 12:49:43 -08:00
parent f21230d3e1
commit a504e31f0f
1 changed files with 2 additions and 6 deletions
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8
src/i830_lvds.c
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@ -50,12 +50,10 @@ i830SetLVDSPanelPower(ScrnInfoPtr pScrn, Bool on)
pI830->backlight_duty_cycle = backlight_duty_cycle;
if (on) {
OUTREG(PP_STATUS, INREG(PP_STATUS) | PP_ON);
OUTREG(PP_CONTROL, INREG(PP_CONTROL) | POWER_TARGET_ON);
do {
pp_status = INREG(PP_STATUS);
pp_control = INREG(PP_CONTROL);
} while (!(pp_status & PP_ON) && !(pp_control & POWER_TARGET_ON));
} while ((pp_status & PP_ON) == 0);
OUTREG(BLC_PWM_CTL,
(blc_pwm_ctl & ~BACKLIGHT_DUTY_CYCLE_MASK) |
pI830->backlight_duty_cycle);
@ -63,12 +61,10 @@ i830SetLVDSPanelPower(ScrnInfoPtr pScrn, Bool on)
OUTREG(BLC_PWM_CTL,
(blc_pwm_ctl & ~BACKLIGHT_DUTY_CYCLE_MASK));
OUTREG(PP_STATUS, INREG(PP_STATUS) & ~PP_ON);
OUTREG(PP_CONTROL, INREG(PP_CONTROL) & ~POWER_TARGET_ON);
do {
pp_status = INREG(PP_STATUS);
pp_control = INREG(PP_CONTROL);
} while ((pp_status & PP_ON) || (pp_control & POWER_TARGET_ON));
} while (pp_status & PP_ON);
}
}