| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <device/pci_ops.h> |
| #include <soc/gfx.h> |
| #include <soc/pci_devs.h> |
| #include <soc/romstage.h> |
| |
| void gfx_init(void) |
| { |
| uint32_t ggc; |
| uint8_t msac; |
| const unsigned int gfx_dev = PCI_DEV(0, GFX_DEV, GFX_FUNC); |
| |
| /* The GFX device needs to set the aperture, gtt stolen size, and |
| * graphics stolen memory stolen size before running MRC. For now |
| * just hard code the defaults. Options can be added to the device |
| * tree if needed. */ |
| |
| ggc = pci_read_config32(gfx_dev, GGC); |
| msac = pci_read_config8(gfx_dev, MSAC); |
| |
| ggc &= ~(GGC_GTT_SIZE_MASK | GGC_GSM_SIZE_MASK); |
| /* 32MB GSM is not supported with <C0 stepping. */ |
| ggc |= GGC_GTT_SIZE_2MB | GGC_GSM_SIZE_64MB; |
| /* Enable VGA decoding as well. */ |
| ggc &= ~(GGC_VGA_DISABLE); |
| |
| msac &= ~(APERTURE_SIZE_MASK); |
| msac |= APERTURE_SIZE_256MB; |
| |
| pci_write_config32(gfx_dev, GGC, ggc); |
| pci_write_config8(gfx_dev, MSAC, msac); |
| } |