diff options
| author | Niklas Schulze <me@jns.io> | 2019-07-27 12:07:13 +0000 |
|---|---|---|
| committer | Anatolij Gustschin <agust@denx.de> | 2019-07-29 00:32:59 +0200 |
| commit | 60a62acfb07afb0815f28abe6f49a9b906a7c3f4 (patch) | |
| tree | 84b3875ef9c441ffb7c8a5275423f68cf25a0aed | |
| parent | 233358c46a753438d9f0c26dc67dad3ddecca1e9 (diff) | |
| download | u-boot-60a62acfb07afb0815f28abe6f49a9b906a7c3f4.tar.gz u-boot-60a62acfb07afb0815f28abe6f49a9b906a7c3f4.tar.bz2 u-boot-60a62acfb07afb0815f28abe6f49a9b906a7c3f4.zip | |
video: dw_hdmi: Add support for ddc-i2c-bus property
Add support for the ddc-i2c-bus device tree property which allows
for using an external i2c master for reading the display's EDID.
Signed-off-by: Niklas Schulze <me@jns.io>
| -rw-r--r-- | drivers/video/dw_hdmi.c | 13 | ||||
| -rw-r--r-- | drivers/video/meson/meson_dw_hdmi.c | 3 | ||||
| -rw-r--r-- | drivers/video/rockchip/rk_hdmi.c | 3 | ||||
| -rw-r--r-- | drivers/video/sunxi/sunxi_dw_hdmi.c | 3 | ||||
| -rw-r--r-- | include/dw_hdmi.h | 1 |
5 files changed, 23 insertions, 0 deletions
diff --git a/drivers/video/dw_hdmi.c b/drivers/video/dw_hdmi.c index 463436edf3..bf74d6adf2 100644 --- a/drivers/video/dw_hdmi.c +++ b/drivers/video/dw_hdmi.c @@ -8,6 +8,7 @@ #include <common.h> #include <fdtdec.h> #include <asm/io.h> +#include <i2c.h> #include <media_bus_format.h> #include "dw_hdmi.h" @@ -812,6 +813,18 @@ static int hdmi_read_edid(struct dw_hdmi *hdmi, int block, u8 *buff) u32 trytime = 5; u32 n; + if (CONFIG_IS_ENABLED(DM_I2C) && hdmi->ddc_bus) { + struct udevice *chip; + + edid_read_err = i2c_get_chip(hdmi->ddc_bus, + HDMI_I2CM_SLAVE_DDC_ADDR, + 1, &chip); + if (edid_read_err) + return edid_read_err; + + return dm_i2c_read(chip, shift, buff, HDMI_EDID_BLOCK_SIZE); + } + /* set ddc i2c clk which devided from ddc_clk to 100khz */ hdmi_write(hdmi, hdmi->i2c_clk_high, HDMI_I2CM_SS_SCL_HCNT_0_ADDR); hdmi_write(hdmi, hdmi->i2c_clk_low, HDMI_I2CM_SS_SCL_LCNT_0_ADDR); diff --git a/drivers/video/meson/meson_dw_hdmi.c b/drivers/video/meson/meson_dw_hdmi.c index 617f75724b..9831d978fc 100644 --- a/drivers/video/meson/meson_dw_hdmi.c +++ b/drivers/video/meson/meson_dw_hdmi.c @@ -375,6 +375,9 @@ static int meson_dw_hdmi_probe(struct udevice *dev) } #endif + uclass_get_device_by_phandle(UCLASS_I2C, dev, "ddc-i2c-bus", + &priv->hdmi.ddc_bus); + ret = reset_get_bulk(dev, &resets); if (ret) return ret; diff --git a/drivers/video/rockchip/rk_hdmi.c b/drivers/video/rockchip/rk_hdmi.c index 51931ceefa..5b44a7e8c9 100644 --- a/drivers/video/rockchip/rk_hdmi.c +++ b/drivers/video/rockchip/rk_hdmi.c @@ -93,6 +93,9 @@ int rk_hdmi_ofdata_to_platdata(struct udevice *dev) priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); + uclass_get_device_by_phandle(UCLASS_I2C, dev, "ddc-i2c-bus", + &hdmi->ddc_bus); + return 0; } diff --git a/drivers/video/sunxi/sunxi_dw_hdmi.c b/drivers/video/sunxi/sunxi_dw_hdmi.c index 6fe1aa7ee4..cec23295b5 100644 --- a/drivers/video/sunxi/sunxi_dw_hdmi.c +++ b/drivers/video/sunxi/sunxi_dw_hdmi.c @@ -373,6 +373,9 @@ static int sunxi_dw_hdmi_probe(struct udevice *dev) priv->hdmi.phy_set = sunxi_dw_hdmi_phy_cfg; priv->mux = uc_plat->source_id; + uclass_get_device_by_phandle(UCLASS_I2C, dev, "ddc-i2c-bus", + &priv->hdmi.ddc_bus); + dw_hdmi_init(&priv->hdmi); return 0; diff --git a/include/dw_hdmi.h b/include/dw_hdmi.h index 90fb64bc99..8acae3839f 100644 --- a/include/dw_hdmi.h +++ b/include/dw_hdmi.h @@ -542,6 +542,7 @@ struct dw_hdmi { u8 i2c_clk_low; u8 reg_io_width; struct hdmi_data_info hdmi_data; + struct udevice *ddc_bus; int (*phy_set)(struct dw_hdmi *hdmi, uint mpixelclock); void (*write_reg)(struct dw_hdmi *hdmi, u8 val, int offset); |