diff options
Diffstat (limited to 'src/soc/rockchip/rk3288/hdmi.c')
| -rw-r--r-- | src/soc/rockchip/rk3288/hdmi.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/soc/rockchip/rk3288/hdmi.c b/src/soc/rockchip/rk3288/hdmi.c index 805b98a6e5..1a825abfca 100644 --- a/src/soc/rockchip/rk3288/hdmi.c +++ b/src/soc/rockchip/rk3288/hdmi.c @@ -15,6 +15,7 @@ #include <console/console.h> #include <delay.h> #include <edid.h> +#include <gpio.h> #include <stdlib.h> #include <stdint.h> #include <string.h> @@ -774,8 +775,23 @@ int rk_hdmi_get_edid(struct edid *edid) { u8 edid_buf[HDMI_EDID_BLOCK_SIZE * 2]; u32 edid_size = HDMI_EDID_BLOCK_SIZE; + gpio_t hdmi_i2c_sda = GPIO(7, C, 3); + gpio_t hdmi_i2c_scl = GPIO(7, C, 4); int ret; + /* If SDA is low, try to clock once to fix it */ + gpio_input_pullup(hdmi_i2c_sda); + if (gpio_get(hdmi_i2c_sda) == 0) { + gpio_output(hdmi_i2c_scl, 0); + udelay(1000); + gpio_input_pullup(hdmi_i2c_scl); + udelay(1000); + } + + /* HDMI I2C */ + write32(&rk3288_grf->iomux_i2c5sda, IOMUX_HDMI_EDP_I2C_SDA); + write32(&rk3288_grf->iomux_i2c5scl, IOMUX_HDMI_EDP_I2C_SCL); + ret = hdmi_read_edid(0, edid_buf); if (ret) { hdmi_debug("failed to read edid.\n"); |