触摸是带笔的，数据比较大，用的是spi接口。
一、添加驱动：
drivers/input/touchscreen/hxchipset
二、dts配置
&spi4 {
status = "okay";
pinctrl-0 = <&spi4m1_cs0 &spi4m1_cs1 &spi4m1_pins>;
himax_touch@0 {
compatible = "himax,hxcommon";
reg = <0>;
spi-max-frequency = <10000000>;
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&touch_int>;
himax,irq-gpio = <&gpio1 RK_PB5 IRQ_TYPE_LEVEL_LOW>;
himax,rst-gpio = <&gpio1 RK_PB4 GPIO_ACTIVE_HIGH>;
himax,panel-coords = <0 1200 0 2000>;
himax,display-coords = <0 1200 0 2000>;
report_type = <1>;
};
};
三、添加固件
diff --git a/device.mk b/device.mk
old mode 100644
new mode 100755
index b454e36..db1b079
--- a/device.mk
+++ b/device.mk
@@ -44,6 +44,8 @@ PRODUCT_COPY_FILES += \
PRODUCT_COPY_FILES += \
$(LOCAL_PATH)/init.rk3588.rc:$(TARGET_COPY_OUT_VENDOR)/etc/init/hw/init.rk3588.rc \
+ $(LOCAL_PATH)/rk3588s_s/Himax_firmware.bin:$(TARGET_COPY_OUT_VENDOR)/etc/firmware/Himax_firmware.bin \
$(LOCAL_PATH)/wake_lock_filter.xml:system/etc/wake_lock_filter.xml \
厂家提供正确驱动，驱动正常加载，提供的固件正常加载(/vendor/etc/firmware/Himax_firmware.bin),如果时序正确，那这时候一般都有触点了.
如果有触点，但方向反了或者镜像，那一般是固件没给对，需要提供正确对应的固件。
四、调试过程遇到的一些问题点
1.触摸不稳定，偶尔休眠唤醒或者开机没有触摸，那一般都是时序没有调好，
VCCD, VSP, VSN, LCM_RST, TP_RST这几个信号的时序要控制好：
VSP, VSN时序添加显示驱动中
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
old mode 100644
new mode 100755
index 4e298108a62e..c4e5b96d61f7
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -143,6 +143,9 @@ struct panel_simple {
struct gpio_desc *reset_gpio;
struct gpio_desc *hpd_gpio;
+ struct gpio_desc *enn_gpio;
+ struct gpio_desc *enp_gpio;
+
struct drm_display_mode override_mode;
struct drm_dsc_picture_parameter_set *pps;
@@ -465,6 +468,9 @@ static int panel_simple_unprepare(struct drm_panel *panel)
gpiod_direction_output(p->reset_gpio, 1);
gpiod_direction_output(p->enable_gpio, 0);
+ gpiod_direction_output(p->enn_gpio, 0);
+ gpiod_direction_output(p->enp_gpio, 0);
+
panel_simple_regulator_disable(p);
if (p->desc->delay.unprepare)
@@ -518,6 +524,9 @@ static int panel_simple_prepare(struct drm_panel *panel)
gpiod_direction_output(p->enable_gpio, 1);
+ gpiod_direction_output(p->enn_gpio, 1);
+ gpiod_direction_output(p->enp_gpio, 1);
+
delay = p->desc->delay.prepare;
if (p->no_hpd)
delay += p->desc->delay.hpd_absent_delay;
@@ -810,6 +819,27 @@ static int panel_simple_probe(struct device *dev, const struct pane
l_desc *desc)
return err;
}
+ panel->enn_gpio = devm_gpiod_get_optional(dev, "enn", GPIOD_ASIS);
+ if (IS_ERR(panel->enn_gpio)) {
+ err = PTR_ERR(panel->enn_gpio);
+ if (err != -EPROBE_DEFER)
+ dev_err(dev, "failed to get enn GPIO: %d\n", err);
+ return err;
+ }
+
+ panel->enp_gpio = devm_gpiod_get_optional(dev, "enp", GPIOD_ASIS);
+ if (IS_ERR(panel->enp_gpio)) {
+ err = PTR_ERR(panel->enp_gpio);
+ if (err != -EPROBE_DEFER)
+ dev_err(dev, "failed to get enp GPIO: %d\n", err);
+ return err;
+ }
+
+ gpiod_direction_output(panel->enn_gpio, 1);
+ gpiod_direction_output(panel->enp_gpio, 1);
+
+ msleep(10);
+
panel->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_ASIS);
if (IS_ERR(panel->reset_gpio)) {
err = PTR_ERR(panel->reset_gpio);
1.每次开机触摸不行，休眠唤醒后才有触摸。
需要在u-boot里面添加VSP, VSN信号的控制：
diff --git a/drivers/video/drm/rockchip_panel.c b/drivers/video/drm/rockchip_panel.c
old mode 100644
new mode 100755
index de7e5e25c2..80eba26247
--- a/drivers/video/drm/rockchip_panel.c
+++ b/drivers/video/drm/rockchip_panel.c
@@ -67,6 +67,9 @@ struct rockchip_panel_priv {
struct gpio_desc enable_gpio;
struct gpio_desc reset_gpio;
+ struct gpio_desc enn_gpio;
+ struct gpio_desc enp_gpio;
+
int cmd_type;
struct gpio_desc spi_sdi_gpio;
struct gpio_desc spi_scl_gpio;
@@ -285,6 +288,16 @@ static void panel_simple_prepare(struct rockchip_panel *panel)
if (plat->delay.prepare)
mdelay(plat->delay.prepare);
+ //wmc add
+ if (dm_gpio_is_valid(&priv->enn_gpio))
+ dm_gpio_set_value(&priv->enn_gpio, 1);
+
+ if (dm_gpio_is_valid(&priv->enp_gpio))
+ dm_gpio_set_value(&priv->enp_gpio, 1);
+
+++ b/drivers/video/drm/rockchip_panel.c
@@ -67,6 +67,9 @@ struct rockchip_panel_priv {
struct gpio_desc enable_gpio;
struct gpio_desc reset_gpio;
+ struct gpio_desc enn_gpio;
+ struct gpio_desc enp_gpio;
+
int cmd_type;
struct gpio_desc spi_sdi_gpio;
struct gpio_desc spi_scl_gpio;
@@ -285,6 +288,16 @@ static void panel_simple_prepare(struct rockchip_panel *panel)
if (plat->delay.prepare)
mdelay(plat->delay.prepare);
+ //wmc add
+ if (dm_gpio_is_valid(&priv->enn_gpio))
+ dm_gpio_set_value(&priv->enn_gpio, 1);
+
+ if (dm_gpio_is_valid(&priv->enp_gpio))
+ dm_gpio_set_value(&priv->enp_gpio, 1);
+
+ mdelay(10);
+ /////////////
+
if (dm_gpio_is_valid(&priv->reset_gpio))
dm_gpio_set_value(&priv->reset_gpio, 1);
@@ -339,6 +352,14 @@ static void panel_simple_unprepare(struct rockchip_panel *panel)
if (dm_gpio_is_valid(&priv->reset_gpio))
dm_gpio_set_value(&priv->reset_gpio, 1);
+ //wmc add
+ if (dm_gpio_is_valid(&priv->enn_gpio))
+ dm_gpio_set_value(&priv->enn_gpio, 0);
+
+ if (dm_gpio_is_valid(&priv->enp_gpio))
+ dm_gpio_set_value(&priv->enp_gpio, 0);
+ /////////////
+
if (dm_gpio_is_valid(&priv->enable_gpio))
dm_gpio_set_value(&priv->enable_gpio, 0);
@@ -470,6 +491,20 @@ static int rockchip_panel_probe(struct udevice *dev)
printf("%s: Cannot get reset GPIO: %d\n", __func__, ret);
return ret;
}
+
+ ret = gpio_request_by_name(dev, "enn-gpios", 0,
+ &priv->enn_gpio, GPIOD_IS_OUT);
+ if (ret && ret != -ENOENT) {
+ printf("%s: Cannot get enn GPIO: %d\n", __func__, ret);
+ return ret;
+ }
+
+ ret = gpio_request_by_name(dev, "enp-gpios", 0,
+ &priv->enp_gpio, GPIOD_IS_OUT);
+ if (ret && ret != -ENOENT) {
+ printf("%s: Cannot get enp GPIO: %d\n", __func__, ret);
+ return ret;
+ }
ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
"backlight", &priv->backlight);
标签：10.36,struct,Himax,enn,incell,gpio,desc,priv,panel From： https://www.cnblogs.com/wmc245376374/p/18438222