rockchip: video: edp: Add missing reset support
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>
diff --git a/drivers/video/rockchip/rk_edp.c b/drivers/video/rockchip/rk_edp.c
index 6baee7b..0ddf5e0 100644
--- a/drivers/video/rockchip/rk_edp.c
+++ b/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 @@
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 @@
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);