diff options
Diffstat (limited to 'src/cpu/samsung/exynos5420')
| -rw-r--r-- | src/cpu/samsung/exynos5420/cpu.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/cpu/samsung/exynos5420/cpu.c b/src/cpu/samsung/exynos5420/cpu.c index bda46de63d..5ff345eaa8 100644 --- a/src/cpu/samsung/exynos5420/cpu.c +++ b/src/cpu/samsung/exynos5420/cpu.c @@ -33,6 +33,8 @@ #include "usb.h" #include "chip.h" +#include <ec/google/chromeec/ec.h> + static unsigned int cpu_id; static unsigned int cpu_rev; @@ -141,6 +143,17 @@ static void exynos_displayport_init(device_t dev, u32 lcdbase, mmio_resource(dev, 1, lcdbase/KiB, (fb_size + KiB - 1)/KiB); } +static void tps65090_thru_ec_fet_disable(int index) +{ + uint8_t value = 0; + + if (google_chromeec_i2c_xfer(0x48, 0xe + index, 1, &value, 1, 0)) { + printk(BIOS_ERR, + "Error sending i2c pass through command to EC.\n"); + return; + } +} + static void cpu_enable(device_t dev) { unsigned long fb_size = FB_SIZE_KB * KiB; @@ -149,6 +162,14 @@ static void cpu_enable(device_t dev) ram_resource(dev, 0, RAM_BASE_KB, RAM_SIZE_KB - FB_SIZE_KB); mmio_resource(dev, 1, lcdbase / KiB, (fb_size + KiB - 1) / KiB); + /* + * Disable LCD FETs before we do anything with the display. + * FIXME(dhendrix): This is a gross hack and should be done + * elsewhere (romstage?). + */ + tps65090_thru_ec_fet_disable(1); + tps65090_thru_ec_fet_disable(6); + exynos_displayport_init(dev, lcdbase, fb_size); set_cpu_id(); |