diff options
Diffstat (limited to 'src/soc/intel')
| -rw-r--r-- | src/soc/intel/baytrail/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/intel/baytrail/include/soc/int15.h | 8 | ||||
| -rw-r--r-- | src/soc/intel/baytrail/int15.c | 95 |
3 files changed, 104 insertions, 0 deletions
diff --git a/src/soc/intel/baytrail/Makefile.inc b/src/soc/intel/baytrail/Makefile.inc index f49aac45b0..f4c4d7e75a 100644 --- a/src/soc/intel/baytrail/Makefile.inc +++ b/src/soc/intel/baytrail/Makefile.inc @@ -48,6 +48,7 @@ ramstage-y += smm.c ramstage-y += southcluster.c ramstage-y += xhci.c ramstage-$(CONFIG_ELOG) += elog.c +ramstage-$(CONFIG_VGA_ROM_RUN) += int15.c ifeq ($(CONFIG_HAVE_REFCODE_BLOB),y) ramstage-y += refcode.c diff --git a/src/soc/intel/baytrail/include/soc/int15.h b/src/soc/intel/baytrail/include/soc/int15.h new file mode 100644 index 0000000000..cab911554e --- /dev/null +++ b/src/soc/intel/baytrail/include/soc/int15.h @@ -0,0 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef SOC_INTEL_BAYTRAIL_INT15_H +#define SOC_INTEL_BAYTRAIL_INT15_H + +void install_baytrail_vga_int15_handler(void); + +#endif /* !SOC_INTEL_BAYTRAIL_INT15_H */ diff --git a/src/soc/intel/baytrail/int15.c b/src/soc/intel/baytrail/int15.c new file mode 100644 index 0000000000..62abbc11a6 --- /dev/null +++ b/src/soc/intel/baytrail/int15.c @@ -0,0 +1,95 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <arch/interrupt.h> +#include <console/console.h> +#include <soc/int15.h> +#include <x86emu/x86emu.h> + +static int int15_handler(void) +{ + int res = 1; + + printk(BIOS_DEBUG, "%s: AX=%04x BX=%04x CX=%04x DX=%04x\n", + __func__, X86_AX, X86_BX, X86_CX, X86_DX); + + switch (X86_AX) { + case 0x5f34: + /* + * Set Panel Fitting Hook: + * bit 2 = Graphics Stretching + * bit 1 = Text Stretching + * bit 0 = Centering (do not set with bit1 or bit2) + * 0 = video BIOS default + */ + X86_AX = 0x005f; + X86_CX = 0x0001; + res = 1; + break; + case 0x5f35: + /* + * Boot Display Device Hook: + * bit 0 = CRT + * bit 1 = TV + * bit 2 = EFP (HDMI) + * bit 3 = LFP (eDP)* + * bit 4 = CRT2 + * bit 5 = TV2 + * bit 6 = EFP2 + * bit 7 = LFP2 + */ + X86_AX = 0x005f; + X86_CX = 0x0008; + res = 1; + break; + case 0x5f51: + /* + * Hook to select active LFP configuration: + * 00h = No LVDS, VBIOS does not enable LVDS + * 01h = Int-LVDS, LFP driven by integrated LVDS decoder + * 02h = SVDO-LVDS, LFP driven by SVDO decoder + * 03h = eDP, LFP Driven by Int-DisplayPort encoder + */ + X86_AX = 0x005f; + X86_CX = 0x0003; + res = 1; + break; + case 0x5f70: + switch ((X86_CX >> 8) & 0xff) { + case 0: + /* Get Mux */ + X86_AX = 0x005f; + X86_CX = 0x0000; + res = 1; + break; + case 1: + /* Set Mux */ + X86_AX = 0x005f; + X86_CX = 0x0000; + res = 1; + break; + case 2: + /* Get SG/Non-SG mode */ + X86_AX = 0x005f; + X86_CX = 0x0000; + res = 1; + break; + default: + /* Interrupt was not handled */ + printk(BIOS_DEBUG, + "Unknown INT15 5f70 function: 0x%02x\n", + ((X86_CX >> 8) & 0xff)); + break; + } + break; + + default: + printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", X86_AX); + break; + } + return res; +} + +void install_baytrail_vga_int15_handler(void) +{ + mainboard_interrupt_handlers(0x15, &int15_handler); +} |