mb/google/brya/var/agah: Disable ASPM for dGPU
Since ASPM is not verified as fully functional yet, and the board is
still in development, this patch disables ASPM for the dGPU.
BUG=b:236676400
TEST=boot to OS in agah, lspci -vvv shows ASPM is disabled
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I525eeb18c57d45fd55335b63a59262066afc9567
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65566
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Ivy Jian <ivy.jian@quanta.corp-partner.google.com>
diff --git a/src/mainboard/google/brya/variants/agah/overridetree.cb b/src/mainboard/google/brya/variants/agah/overridetree.cb
index 550dab6..a50a9d4 100644
--- a/src/mainboard/google/brya/variants/agah/overridetree.cb
+++ b/src/mainboard/google/brya/variants/agah/overridetree.cb
@@ -71,6 +71,7 @@
.clk_req = 0,
.clk_src = 0,
.flags = PCIE_RP_LTR | PCIE_RP_AER,
+ .pcie_rp_aspm = ASPM_DISABLE
}"
device pci 00.0 alias dgpu on end
end
diff --git a/src/mainboard/google/brya/variants/agah/variant.c b/src/mainboard/google/brya/variants/agah/variant.c
index b0baab3..437fdc4 100644
--- a/src/mainboard/google/brya/variants/agah/variant.c
+++ b/src/mainboard/google/brya/variants/agah/variant.c
@@ -132,6 +132,10 @@
void variant_init(void)
{
+ /* Disable ASPM for the GPU until it is verified working. */
+ struct device *dgpu = DEV_PTR(dgpu);
+ dgpu->disable_pcie_aspm = 1;
+
if (acpi_is_wakeup_s3())
return;