[coreboot-gerrit] Change in libgfxinit[master]: gma panel: Also wait for `power cycle delay active`

[Nico Huber (Code Review)]

Nico Huber has uploaded this change for review. ( https://review.coreboot.org/c/libgfxinit/+/34470 )

Change subject: gma panel: Also wait for `power cycle delay active`
......................................................................

gma panel: Also wait for `power cycle delay active`

It's possible that the `power cycle progress` bits are only valid if no
power-cycle delay is active. So let's check that bit, too.

Also increase the timeouts to the theoretical maximum, including a pos-
sibly ongoing sequence and the power-cycle delay.

Change-Id: I536a094151c5cc5036c2d39a3d8d6e5826f198ac
Signed-off-by: Nico Huber 
---
M common/hw-gfx-gma-panel.adb
1 file changed, 7 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/libgfxinit refs/changes/70/34470/1

diff --git a/common/hw-gfx-gma-panel.adb b/common/hw-gfx-gma-panel.adb
index 968fbbe..8ccbbb9 100644
--- a/common/hw-gfx-gma-panel.adb
+++ b/common/hw-gfx-gma-panel.adb
@@ -1,5 +1,6 @@
 --
 -- Copyright (C) 2015-2016 secunet Security Networks AG
+-- Copyright (C) 2019 Nico Huber 
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
@@ -305,8 +306,9 @@
       Time.Delay_Until (Power_Up_Timer);
       Registers.Wait_Unset_Mask
         (Register => Panel_PP_Regs.STATUS,
-         Mask     => PCH_PP_STATUS_PWR_SEQ_PROGRESS_MASK,
-         TOut_MS  => 300);
+         Mask     => PCH_PP_STATUS_PWR_SEQ_PROGRESS_MASK or
+                     PCH_PP_STATUS_PWR_CYC_DELAY_ACTIVE,
+         TOut_MS  => 820 + 3_100 + 820);  -- theoretical max: off + cycle + on

Registers.Unset_Mask (Panel_PP_Regs.CONTROL, PCH_PP_CONTROL_VDD_OVERRIDE);
    end Wait_On;
@@ -327,8 +329,9 @@
       end if;
       Registers.Wait_Unset_Mask
         (Register => Panel_PP_Regs.STATUS,
-         Mask     => PCH_PP_STATUS_PWR_SEQ_PROGRESS_MASK,
-         TOut_MS  => 600);
+         Mask     => PCH_PP_STATUS_PWR_SEQ_PROGRESS_MASK or
+                     PCH_PP_STATUS_PWR_CYC_DELAY_ACTIVE,
+         TOut_MS  => 820 + 3_100 + 820);  -- theoretical max: on + cycle + off
       if Was_On then
          Power_Cycle_Timer := Time.US_From_Now (Delays_US (Power_Cycle_Delay));
       end if;