drivers/intel/gma: Hook up libgfxinit in romstage
A mainboard port needs to:
- select `CONFIG_MAINBOARD_HAS_EARLY_LIBGFXINIT'
- implement the Ada package `GMA.Mainboard' with a single function
`ports' that returns a list of ports to be probed for displays.
- set the desired `GFX_GMA_DEFAULT_MMIO' IO memory address to use
in romstage (and ramstage) for the graphic device.
BUG=b:252792591
BRANCH=firmware-brya-14505.B
TEST=libgfxinit compiles in romstage.
libgfxinit successfully executes in romstage and ramstage using
the requested MMIO setting on skolas.
Change-Id: I3c2101de10dc5df54fe873e43bbe0f1c4dccff44
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70276
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/common/block/graphics/graphics.c b/src/soc/intel/common/block/graphics/graphics.c
index e9a6a5d..bc04727 100644
--- a/src/soc/intel/common/block/graphics/graphics.c
+++ b/src/soc/intel/common/block/graphics/graphics.c
@@ -173,6 +173,18 @@
if (res_bar0->flags & IORESOURCE_PREFETCH)
res_bar0->flags &= ~IORESOURCE_PREFETCH;
}
+
+ /*
+ * If libhwbase static MMIO driver is used, IGD BAR 0 has to be set to
+ * CONFIG_GFX_GMA_DEFAULT_MMIO for the libgfxinit to operate properly.
+ */
+ if (CONFIG(MAINBOARD_USE_LIBGFXINIT) && CONFIG(HWBASE_STATIC_MMIO)) {
+ struct resource *res_bar0 = find_resource(dev, PCI_BASE_ADDRESS_0);
+ res_bar0->base = CONFIG_GFX_GMA_DEFAULT_MMIO;
+ res_bar0->flags |= IORESOURCE_ASSIGNED;
+ pci_dev_set_resources(dev);
+ res_bar0->flags |= IORESOURCE_FIXED;
+ }
}
const struct device_operations graphics_ops = {