diff options
| author | Nico Huber <nico.h@gmx.de> | 2022-08-05 13:09:25 +0200 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-08-17 16:29:39 +0000 |
| commit | bba97354b05cc8770d6d913bfe5777b46450bbb8 (patch) | |
| tree | 3a9eef1f44a1c4e102d705d7918b5d980189b3b9 /src/device/pciexp_device.c | |
| parent | 9099feaa94670af2dd558de35b74452570452028 (diff) | |
pciexp_device: Properly search for Intel's 0xcafe capability
We have this quirk in our tree since the introduction of L1-substate
support[1]. The way we searched for this capability was rather crude:
We simply assumed that it would show up in the first data word of
another capability.
As it turned out that it is actually a proper vendor-specific capa-
bility that we are looking for, we can drop some of the mystic code.
This was confirmed to work on the device that was originally used
during development, Google/Samus.
[1] commit 31c6e632cf (PCIe: Add L1 Sub-State support.)
Change-Id: I886fb96e9a92387bc0e2a7feb746f7842cee5476
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66455
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/device/pciexp_device.c')
| -rw-r--r-- | src/device/pciexp_device.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/device/pciexp_device.c b/src/device/pciexp_device.c index bc4012503a..3bb5cb82df 100644 --- a/src/device/pciexp_device.c +++ b/src/device/pciexp_device.c @@ -5,6 +5,7 @@ #include <delay.h> #include <device/device.h> #include <device/pci.h> +#include <device/pci_ids.h> #include <device/pci_ops.h> #include <device/pciexp.h> @@ -387,7 +388,10 @@ static void pciexp_config_L1_sub_state(struct device *root, struct device *dev) end_cap = pciexp_find_extended_cap(dev, PCIE_EXT_CAP_L1SS_ID, 0); if (!end_cap) { - end_cap = pciexp_find_extended_cap(dev, 0xcafe, 0); + if (dev->vendor != PCI_VID_INTEL) + return; + + end_cap = pciexp_find_ext_vendor_cap(dev, 0xcafe, 0); if (!end_cap) return; } |