diff options
| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2020-12-19 23:43:56 +0200 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2021-02-06 07:33:51 +0000 |
| commit | 0f30063abf4fa29ba6671dcbab7879334f7bd013 (patch) | |
| tree | b17043fd82103435f6ae5acf15e9924facd5d06c /src/device | |
| parent | 021c621eb0c8b21a34902519da595df94a973414 (diff) | |
soc/intel/broadwell: Conditionally skip PRE_GRAPHICS_DELAY
It was commented that the need for the delay was mainly related
to external displays and only with VBIOS execution. Move the
delay such that it is done only when we actually need to execute
the VBIOS aka option rom.
A delay is currently only defined for librem/purism_bdw in
its Kconfig. As the description of the issue sounds like it
would equally happen on other platforms when VBIOS is involved,
promote the Kconfig visible option to global scope.
Change-Id: I4503158576f35057373f003586bbf76af4d59b3d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48787
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src/device')
| -rw-r--r-- | src/device/Kconfig | 10 | ||||
| -rw-r--r-- | src/device/pci_device.c | 9 |
2 files changed, 19 insertions, 0 deletions
diff --git a/src/device/Kconfig b/src/device/Kconfig index 0e5de456ae..421ad66fea 100644 --- a/src/device/Kconfig +++ b/src/device/Kconfig @@ -117,6 +117,16 @@ config NO_GFX_INIT endchoice +config PRE_GRAPHICS_DELAY + int "Graphics initialization delay in ms" + default 0 + depends on VGA_ROM_RUN + help + On some systems, coreboot boots so fast that connected monitors + (mostly TVs) won't be able to wake up fast enough to talk to the + VBIOS. On those systems we need to wait for a bit before executing + the VBIOS. + config ONBOARD_VGA_IS_PRIMARY bool "Use onboard VGA as primary video device" default n diff --git a/src/device/pci_device.c b/src/device/pci_device.c index 66f5447126..cd98f07605 100644 --- a/src/device/pci_device.c +++ b/src/device/pci_device.c @@ -732,6 +732,12 @@ static int should_load_oprom(struct device *dev) return 0; } +static void oprom_pre_graphics_stall(void) +{ + if (CONFIG_PRE_GRAPHICS_DELAY) + mdelay(CONFIG_PRE_GRAPHICS_DELAY); +} + /** Default handler: only runs the relevant PCI BIOS. */ void pci_dev_init(struct device *dev) { @@ -760,6 +766,9 @@ void pci_dev_init(struct device *dev) if (!should_run_oprom(dev, rom)) return; + /* Wait for any configured pre-graphics delay */ + oprom_pre_graphics_stall(); + run_bios(dev, (unsigned long)ram); gfx_set_init_done(1); |