In order to ensure that the eDP registers are in correct state, add missing support for the eDP reset lines found in the device-tree.
Signed-off-by: Arnaud Patard arnaud.patard@rtp-net.org Tested-by: Peter Robinson pbrobinson@gmail.com Index: u-boot/drivers/video/rockchip/rk_edp.c =================================================================== --- u-boot.orig/drivers/video/rockchip/rk_edp.c +++ u-boot/drivers/video/rockchip/rk_edp.c @@ -8,11 +8,13 @@ #include <clk.h> #include <display.h> #include <dm.h> +#include <dm/device_compat.h> #include <edid.h> #include <log.h> #include <malloc.h> #include <panel.h> #include <regmap.h> +#include <reset.h> #include <syscon.h> #include <asm/gpio.h> #include <asm/io.h> @@ -1053,6 +1055,7 @@ static int rk_edp_probe(struct udevice * struct rk_edp_priv *priv = dev_get_priv(dev); struct rk3288_edp *regs = priv->regs; struct rockchip_dp_data *edp_data = (struct rockchip_dp_data *)dev_get_driver_data(dev); + struct reset_ctl dp_rst;
struct clk clk; int ret; @@ -1065,6 +1068,25 @@ static int rk_edp_probe(struct udevice * return ret; }
+ ret = reset_get_by_name(dev, "dp", &dp_rst); + if (ret) { + dev_err(dev, "failed to get dp reset (ret=%d)\n", ret); + return ret; + } + + ret = reset_assert(&dp_rst); + if (ret) { + dev_err(dev, "failed to assert dp reset (ret=%d)\n", ret); + return ret; + } + udelay(20); + + ret = reset_deassert(&dp_rst); + if (ret) { + dev_err(dev, "failed to deassert dp reset (ret=%d)\n", ret); + return ret; + } + int vop_id = uc_plat->source_id; debug("%s, uc_plat=%p, vop_id=%u\n", __func__, uc_plat, vop_id);