diff options
Diffstat (limited to 'src/mainboard/google/fizz/mainboard.c')
| -rw-r--r-- | src/mainboard/google/fizz/mainboard.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/mainboard/google/fizz/mainboard.c b/src/mainboard/google/fizz/mainboard.c index 89e692741e..6a7d452942 100644 --- a/src/mainboard/google/fizz/mainboard.c +++ b/src/mainboard/google/fizz/mainboard.c @@ -16,6 +16,7 @@ #include <arch/acpi.h> #include <baseboard/variants.h> #include <chip.h> +#include <delay.h> #include <device/device.h> #include <ec/ec.h> #include <ec/google/chromeec/ec.h> @@ -26,8 +27,11 @@ #include <soc/pci_devs.h> #include <soc/nhlt.h> #include <string.h> +#include <timer.h> #include <vendorcode/google/chromeos/chromeos.h> +#include <variant/gpio.h> + #define FIZZ_SKU_ID_I7_U42 0x4 #define FIZZ_SKU_ID_I5_U42 0x5 #define FIZZ_SKU_ID_I3_U42 0x6 @@ -230,6 +234,50 @@ static void mainboard_enable(struct device *dev) dev->ops->write_acpi_tables = mainboard_write_acpi_tables; } +#define GPIO_HDMI_HPD GPP_E13 +#define GPIO_DP_HPD GPP_E14 + +/* TODO: This can be moved to common directory */ +static void wait_for_hpd(gpio_t gpio, long timeout) +{ + struct stopwatch sw; + + printk(BIOS_INFO, "Waiting for HPD\n"); + gpio_input(gpio); + + stopwatch_init_msecs_expire(&sw, timeout); + while (!gpio_get(gpio)) { + if (stopwatch_expired(&sw)) { + printk(BIOS_WARNING, + "HPD not ready after %ldms. Abort.\n", timeout); + return; + } + mdelay(200); + } + printk(BIOS_INFO, "HPD ready after %lu ms\n", + stopwatch_duration_msecs(&sw)); +} + +static void mainboard_chip_init(void *chip_info) +{ + const struct pad_config *pads; + size_t num; + static const long display_timeout_ms = 3000; + + /* This is reconfigured back to whatever FSP-S expects by + gpio_configure_pads. */ + gpio_input(GPIO_HDMI_HPD); + if (display_init_required() && !gpio_get(GPIO_HDMI_HPD)) { + /* This has to be done before FSP-S runs. */ + if (google_chromeec_wait_for_displayport(display_timeout_ms)) + wait_for_hpd(GPIO_DP_HPD, display_timeout_ms); + } + + pads = variant_gpio_table(&num); + gpio_configure_pads(pads, num); +} + struct chip_operations mainboard_ops = { + .init = mainboard_chip_init, .enable_dev = mainboard_enable, }; |