[M] Change in coreboot[master]: mb/google/brya/acpi: Hades Update ACPI GPU Sequences to have Aborts

[Eran Mitrani (Code Review)]

Eran Mitrani has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/76146?usp=email )

Change subject: mb/google/brya/acpi: Hades Update ACPI GPU Sequences to have Aborts
......................................................................

mb/google/brya/acpi: Hades Update ACPI GPU Sequences to have Aborts

For Hades power on sequence , in case an expected handshake fails when
powering on, abort and power off.
Note: Also added an error if timing out waiting for correct vendor ID.

BUG=287218791
TEST=Tested on Hades. currently fails on the VID error, set to WIP.

Signed-off-by: Eran Mitrani 
Change-Id: I1ea1916c52461d36f2fc8d4cb98bbc0f56d998c7
---
M src/mainboard/google/brya/acpi/power.asl
1 file changed, 53 insertions(+), 9 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/46/76146/1

diff --git a/src/mainboard/google/brya/acpi/power.asl b/src/mainboard/google/brya/acpi/power.asl
index 7eb31d8..8626bcb 100644
--- a/src/mainboard/google/brya/acpi/power.asl
+++ b/src/mainboard/google/brya/acpi/power.asl
@@ -111,6 +111,21 @@
    		    Local0, PMC_RP_IDX, Local1)
 }

+/*
+ * Check return code from GPPL, and shut down if it failed.
+ * Arg0 == return code from GPPL: 0 = OK, FF = Failure
+ * Arg1 == calling function name
+ * Arg2 == signal name
+ */
+Method(PGOR, 3, Serialized)
+{
+	if (Arg0 != 0) {
+		Printf("[ERROR] %o: %o not asserted. Shutting down power.", Arg1, Arg2)
+		PGOF()
+	}
+	Return (Arg0)
+}
+
 /* "GC6 In", i.e. GC6 Entry Sequence */
 Method (GC6I, 0, Serialized)
 {
@@ -168,15 +183,24 @@
    STXS (GPIO_GPU_PERST_L)

/* Wait for GPU to assert GPU_NVVDD_EN */
-	GPPL (GPIO_GPU_NVVDD_EN, 1, 20)
+	Local0 = GPPL (GPIO_GPU_NVVDD_EN, 1, 20)
+	if (PGOR(Local0, "GC6O", "GPIO_GPU_NVVDD_EN") != 0) {
+		return
+	}

/* Ramp up NVVDD */
    STXS (GPIO_NVVDD_PWR_EN)
-	GPPL (NVPG, 1, 4)
+	Local0 = GPPL (NVPG, 1, 4)
+	if (PGOR(Local0,  "GC6O", "GPIO_GPU_NVVDD_EN") != 0) {
+		return
+	}

/* Ramp up PEXVDD */
    STXS (GPIO_PEXVDD_PWR_EN)
-	GPPL (GPIO_PEXVDD_PG, 1, 4)
+	Local0 = GPPL (GPIO_PEXVDD_PG, 1, 4)
+	if (PGOR(Local0,  "GC6O", "GPIO_PEXVDD_PG") != 0) {
+		return
+	}

/* Ramp up FBVDD - TODO: Remove Agah when board is dropped */
 #if CONFIG(BOARD_GOOGLE_AGAH)
@@ -200,6 +224,7 @@
    	Local0--
    	If (Local0 == 0)
    	{
+			Printf("[ERROR] dGPU didn't reappear on the bus.. NVID=0x%x", NVID)
    		Break
    	}
    }
@@ -229,23 +254,38 @@

/* Ramp up 1.2V rail on boards with support */
    STXS (GPIO_NV12_PWR_EN)
-	GPPL (GPIO_NV12_PG, 1, 5)
+	Local0 = GPPL (GPIO_NV12_PG, 1, 5)
+	if (PGOR(Local0, "PGON", "GPIO_NV12_PG") != 0) {
+		return
+	}

/* Ramp up 1.8V rail */
    STXS (GPEN)
-	GPPL (GPIO_1V8_PG, 1, 20)
+	Local0 = GPPL (GPIO_1V8_PG, 1, 20)
+	if (PGOR(Local0, "PGON", "GPIO_1V8_PG") != 0) {
+		return
+	}

/* Ramp up NV33 rail */
    STXS (GPIO_NV33_PWR_EN)
-	GPPL (GPIO_NV33_PG, 1, 20)
+	Local0 = GPPL (GPIO_NV33_PG, 1, 20)
+	if (PGOR(Local0, "PGON", "GPIO_NV33_PG") != 0) {
+		return
+	}

/* Ramp up NVVDD rail */
    STXS (GPIO_NVVDD_PWR_EN)
-	GPPL (NVPG, 1, 5)
+	Local0 = GPPL (NVPG, 1, 5)
+	if (PGOR(Local0, "PGON", "NVPG") != 0) {
+		return
+	}

/* Ramp up PEXVDD rail */
    STXS (GPIO_PEXVDD_PWR_EN)
-	GPPL (GPIO_PEXVDD_PG, 1, 5)
+	Local0 = GPPL (GPIO_PEXVDD_PG, 1, 5)
+	if (PGOR(Local0, "PGON", "GPIO_PEXVDD_PG") != 0) {
+		return
+	}

/* Ramp up FBVDD rail */
 #if CONFIG(BOARD_GOOGLE_AGAH)
@@ -254,7 +294,10 @@
    STXS (GPIO_FBVDD_PWR_EN)
 #endif

-	GPPL (GPIO_FBVDD_PG, 1, 5)
+	Local0 = GPPL (GPIO_FBVDD_PG, 1, 5)
+	if (PGOR(Local0, "PGON", "GPIO_FBVDD_PG") != 0) {
+		return
+	}

/* All rails are good */
    STXS (GPIO_GPU_ALLRAILS_PG)
@@ -333,6 +376,7 @@
    	Local0--
    	If (Local0 == 0)
    	{
+			Printf("[ERROR] dGPU didn't reappear on the bus.. NVID=0x%x", NVID)
    		Break
    	}
    }