src/device: Add option to look at revision in option roms
AMD's Family 17h SOCs have the same vendor and device IDs for
their graphics blocks, but need different video BIOSes. The
only difference is the revision number.
Add a Kconfig option that allows us to add the revision number
of the graphics device to the PCI option rom saved in CBFS.
Because searching CBFS takes a non-trivial amount of time,
only enable the option if it's needed. If it's not used, or
if nothing matches, the check will fall through and search for
an option rom with no version.
BUG=b:145817712
TEST=With surrounding patches, loads dali vbios
Change-Id: Icb610a2abe7fcd0f4dc3716382b9853551240a7a
Signed-off-by: Martin Roth <martinroth@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/2013181
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39792
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
diff --git a/src/device/Kconfig b/src/device/Kconfig
index 66130cc..de33b04 100644
--- a/src/device/Kconfig
+++ b/src/device/Kconfig
@@ -669,14 +669,14 @@
depends on VGA_BIOS
default "1106,3230"
help
- The comma-separated PCI vendor and device ID that would associate
- your VGA BIOS to your video card.
+ The comma-separated PCI vendor and device ID with optional revision if that
+ feature is enabled that would associate your vBIOS to your video card.
- Example: 1106,3230
+ Example: 1106,3230 or 1106,3230,a3
In the above example 1106 is the PCI vendor ID (in hex, but without
the "0x" prefix) and 3230 specifies the PCI device ID of the
- video card (also in hex, without "0x" prefix).
+ video card (also in hex, without "0x" prefix). a3 specifies the revision.
Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.
@@ -698,17 +698,23 @@
string "Graphics device PCI IDs"
depends on VGA_BIOS_SECOND
help
- The comma-separated PCI vendor and device ID that would associate
- your vBIOS to your video card.
+ The comma-separated PCI vendor and device ID with optional revision if that
+ feature is enabled that would associate your vBIOS to your video card.
- Example: 1106,3230
+ Example: 1106,3230 or 1106,3230,a3
In the above example 1106 is the PCI vendor ID (in hex, but without
the "0x" prefix) and 3230 specifies the PCI device ID of the
- video card (also in hex, without "0x" prefix).
+ video card (also in hex, without "0x" prefix). a3 specifies the revision.
Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.
+config CHECK_REV_IN_OPROM_NAME
+ def_bool n
+ help
+ Select this in the platform BIOS or chipset if the option rom has a revision
+ that needs to be checked when searching CBFS.
+
config VGA_BIOS_DGPU
bool "Add a discrete VGA BIOS image"
depends on VGA_BIOS
diff --git a/src/device/pci_rom.c b/src/device/pci_rom.c
index 27f2d8d..6af20e8 100644
--- a/src/device/pci_rom.c
+++ b/src/device/pci_rom.c
@@ -27,11 +27,17 @@
struct rom_header *pci_rom_probe(struct device *dev)
{
- struct rom_header *rom_header;
+ struct rom_header *rom_header = NULL;
struct pci_data *rom_data;
/* If it's in FLASH, then don't check device for ROM. */
- rom_header = cbfs_boot_map_optionrom(dev->vendor, dev->device);
+ if (CONFIG(CHECK_REV_IN_OPROM_NAME)) {
+ uint8_t rev = pci_read_config8(dev, PCI_REVISION_ID);
+ rom_header = cbfs_boot_map_optionrom_revision(dev->vendor, dev->device, rev);
+ }
+
+ if (!rom_header)
+ rom_header = cbfs_boot_map_optionrom(dev->vendor, dev->device);
u32 vendev = (dev->vendor << 16) | dev->device;
u32 mapped_vendev;