vboot: remove OPROM-related code

As of CL:1605641, vboot2 code should be used for setting and
checking display init state.  Remove all vboot1 OPROM-related
code, and use the vboot2 display init code which has already
been added in previous commits.

coreboot should not be reading vboot NVRAM flags directly.
Remove the function vboot_wants_oprom(), and instead rely on
display_init_required(), which uses the
VBOOT_WD_FLAG_DISPLAY_INIT value stored in
vboot_working_data.flags, initialized during verstage.
Note that this means in the case of CONFIG_VBOOT=y, the return
value of display_init_required() can only be trusted after
verstage has been executed.  This should not be a problem
assuming that all display initialization occurs in ramstage.

BUG=b:124141368, b:124192753, chromium:948529
TEST=Build locally
TEST=make clean && make test-abuild
BRANCH=none

Change-Id: Ic8f9dc5a3c7f1546a8fed82bde02be4d04568f8d
Signed-off-by: Joel Kitching <kitching@google.com>
Cq-Depend: chromium:1605641, chromium:1605525
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32723
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/device/pci_device.c

@@ -780,9 +780,6 @@ static int should_run_oprom(struct device *dev)
 	 */
 	should_run = display_init_required();
 
-	if (!should_run && CONFIG(VBOOT))
-		should_run = vboot_wants_oprom();
-
 	if (!should_run)
 		printk(BIOS_DEBUG, "Not running VGA Option ROM\n");
 	return should_run;

src/security/vboot/vbnv.c

@@ -140,13 +140,6 @@ int get_recovery_mode_from_vbnv(void)
 	return vbnv_data(RECOVERY_OFFSET);
 }
 
-/* Read the BOOT_DISPLAY_REQUEST flag from VBNV. */
-int vboot_wants_oprom(void)
-{
-	vbnv_setup();
-	return (vbnv_data(BOOT_OFFSET) & BOOT_DISPLAY_REQUEST) ? 1 : 0;
-}
-
 /* Read the USB Device Controller(UDC) enable flag from VBNV. */
 int vbnv_udc_enable_flag(void)
 {

src/security/vboot/vbnv.h

@@ -25,7 +25,6 @@ int verify_vbnv(uint8_t *vbnv_copy);
 void regen_vbnv_crc(uint8_t *vbnv_copy);
 int get_recovery_mode_from_vbnv(void);
 void set_recovery_mode_into_vbnv(int recovery_reason);
-int vboot_wants_oprom(void);
 
 /* Read the USB Device Controller(UDC) enable flag from VBNV. */
 int vbnv_udc_enable_flag(void);

src/security/vboot/vboot_handoff.c

@@ -68,13 +68,6 @@ static void fill_vboot_handoff(struct vboot_handoff *vboot_handoff,
 		vb_sd->flags |= VBSD_BOOT_DEV_SWITCH_ON;
 		vb_sd->flags |= VBSD_LF_DEV_SWITCH_ON;
 	}
-	/* TODO(chromium:948529): Remove these two flags after downstream
-	   vboot code longer reads them. */
-	if (vboot_wants_oprom() || vb2_sd->recovery_reason ||
-	    vb2_sd->flags & VB2_SD_FLAG_DEV_MODE_ENABLED)
-		vb_sd->flags |= VBSD_OPROM_LOADED;
-	if (CONFIG(VBOOT_MUST_REQUEST_DISPLAY))
-		vb_sd->flags |= VBSD_OPROM_MATTERS;
 
 	/* In vboot1, VBSD_FWB_TRIED is
 	 * set only if B is booted as explicitly requested. Therefore, if B is

src/soc/intel/broadwell/igd.c

@@ -513,7 +513,7 @@ static void igd_init(struct device *dev)
 	/* Wait for any configured pre-graphics delay */
 	if (!acpi_is_wakeup_s3()) {
 #if CONFIG(CHROMEOS)
-		if (display_init_required() || vboot_wants_oprom())
+		if (display_init_required())
 			mdelay(CONFIG_PRE_GRAPHICS_DELAY);
 #else
 		mdelay(CONFIG_PRE_GRAPHICS_DELAY);