diff --git a/arch/x86/cpu/queensbay/Kconfig b/arch/x86/cpu/queensbay/Kconfig index fbf85f233fb36e9e2ae98c02b411ff6b9da4b6b2..6136d75422cb3cbd9367609d4d6e700d6d21c326 100644 --- a/arch/x86/cpu/queensbay/Kconfig +++ b/arch/x86/cpu/queensbay/Kconfig @@ -42,4 +42,12 @@ config CPU_ADDR_BITS int default 32 +config DISABLE_IGD + bool "Disable Integrated Graphics Device (IGD)" + help + Disable the Integrated Graphics Device (IGD) so that it does not + show in the PCI configuration space as a VGA disaplay controller. + This gives a chance for U-Boot to run PCI/PCIe based graphics + card's VGA BIOS and use that card for the graphics console. + endif diff --git a/arch/x86/cpu/queensbay/tnc.c b/arch/x86/cpu/queensbay/tnc.c index 9682cfff26b96ac7ba0d84d10eb09d660cc280e3..0c02a44f63f673ce3475019f7a6508d3ce475288 100644 --- a/arch/x86/cpu/queensbay/tnc.c +++ b/arch/x86/cpu/queensbay/tnc.c @@ -23,6 +23,16 @@ static void unprotect_spi_flash(void) x86_pci_write_config32(TNC_LPC, 0xd8, bc); } +static void __maybe_unused disable_igd(void) +{ + u32 gc; + + gc = x86_pci_read_config32(TNC_IGD, IGD_GC); + gc &= ~GMS_MASK; + gc |= VGA_DISABLE; + x86_pci_write_config32(TNC_IGD, IGD_GC, gc); +} + int arch_cpu_init(void) { int ret; @@ -39,6 +49,15 @@ int arch_cpu_init(void) return 0; } +int arch_early_init_r(void) +{ +#ifdef CONFIG_DISABLE_IGD + disable_igd(); +#endif + + return 0; +} + void cpu_irq_init(void) { struct tnc_rcba *rcba; diff --git a/arch/x86/include/asm/arch-queensbay/tnc.h b/arch/x86/include/asm/arch-queensbay/tnc.h index ad9a6c4892f47929321e3328bda21aaa7f3194ab..23653949de678416c464d45b89ef52a33b313b96 100644 --- a/arch/x86/include/asm/arch-queensbay/tnc.h +++ b/arch/x86/include/asm/arch-queensbay/tnc.h @@ -7,6 +7,11 @@ #ifndef _X86_ARCH_TNC_H_ #define _X86_ARCH_TNC_H_ +/* IGD Control Register */ +#define IGD_GC 0x50 +#define VGA_DISABLE 0x00020000 +#define GMS_MASK 0x00700000 + /* Memory BAR Enable */ #define MEM_BAR_EN 0x00000001 diff --git a/include/configs/crownbay.h b/include/configs/crownbay.h index 3153a74d3b819ca468e8c802692d7f965aea0963..7f91ffffa56f20ca1585df991d925197878233bd 100644 --- a/include/configs/crownbay.h +++ b/include/configs/crownbay.h @@ -15,6 +15,7 @@ #define CONFIG_SYS_MONITOR_LEN (1 << 20) #define CONFIG_BOARD_EARLY_INIT_F +#define CONFIG_ARCH_EARLY_INIT_R #define CONFIG_ARCH_MISC_INIT #define CONFIG_SMSC_LPC47M