diff options
Diffstat (limited to 'src/drivers/intel/gma/intel_dp.c')
| -rw-r--r-- | src/drivers/intel/gma/intel_dp.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/drivers/intel/gma/intel_dp.c b/src/drivers/intel/gma/intel_dp.c index 4b5f7c49c1..8097c6aca5 100644 --- a/src/drivers/intel/gma/intel_dp.c +++ b/src/drivers/intel/gma/intel_dp.c @@ -621,6 +621,26 @@ static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp) ironlake_wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE); } +void intel_dp_wait_reg(unsigned long addr, + unsigned long val) +{ + unsigned long newval; + int tries = 0; + + while ((newval = io_i915_read32(addr)) != val) { + udelay(1); + if (tries++ > 1000) { + printk(BIOS_ERR, "%s: Waiting on %08lx to be %08lx, got %08lx\n", + __func__, addr, val, newval); + break; + } + } +} + +void intel_dp_wait_panel_power_control(unsigned long val) +{ + intel_dp_wait_reg(PCH_PP_CONTROL, val); +} /* Read the current pp_control value, unlocking the register if it * is locked |