[coreboot-gerrit] Change in coreboot[master]: drivers/intel/gma: Fix OpRegion Mailbox3 synchronization
Nico Huber (Code Review)
gerrit at coreboot.org
Thu Aug 23 23:58:04 CEST 2018
Nico Huber has uploaded this change for review. ( https://review.coreboot.org/28302
Change subject: drivers/intel/gma: Fix OpRegion Mailbox3 synchronization
......................................................................
drivers/intel/gma: Fix OpRegion Mailbox3 synchronization
Make XBCM `Serialized` (obvious), and check for the callee clearing the
request bit (we checked only the status for 0 which we potentially wrote
ourselves).
Change-Id: Ic92d525eda8d0a159fa5ddaacf230658d71c1578
Signed-off-by: Nico Huber <nico.h at gmx.de>
---
M src/drivers/intel/gma/acpi/configure_brightness_levels.asl
1 file changed, 9 insertions(+), 4 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/02/28302/1
diff --git a/src/drivers/intel/gma/acpi/configure_brightness_levels.asl b/src/drivers/intel/gma/acpi/configure_brightness_levels.asl
index 024360f..951d33d 100644
--- a/src/drivers/intel/gma/acpi/configure_brightness_levels.asl
+++ b/src/drivers/intel/gma/acpi/configure_brightness_levels.asl
@@ -55,7 +55,7 @@
* * Driver not loaded or not ready
* * Driver reported an error during ASLE IRQ
*/
- Method (XBCM, 1, NotSerialized)
+ Method (XBCM, 1, Serialized)
{
If (LEqual(ASLS, Zero))
{
@@ -84,9 +84,14 @@
While (LGreater(Local0, Zero))
{
Sleep (1)
- If (LEqual(And(ShiftRight(ASLC, 12), 0x3), Zero))
- {
- Return (Zero)
+ If (LEqual (And (ASLC, 0x2), 0)) {
+ /* Request has been processed, check status: */
+ And (ShiftRight (ASLC, 12), 0x3, Local1)
+ If (LEqual (Local1, 0)) {
+ Return (0)
+ } Else {
+ Return (Ones)
+ }
}
Decrement (Local0)
}
--
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ic92d525eda8d0a159fa5ddaacf230658d71c1578
Gerrit-Change-Number: 28302
Gerrit-PatchSet: 1
Gerrit-Owner: Nico Huber <nico.h at gmx.de>
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