esp_lcd: Add function for register on color done callback.

components/esp_lcd/include/esp_lcd_panel_io.h

@@ -19,6 +19,30 @@ typedef void *esp_lcd_spi_bus_handle_t;                       /*!< Type of LCD S
 typedef void *esp_lcd_i2c_bus_handle_t;                       /*!< Type of LCD I2C bus handle */
 typedef struct esp_lcd_i80_bus_t *esp_lcd_i80_bus_handle_t;   /*!< Type of LCD intel 8080 bus handle */
 
+/**
+ * @brief Type of LCD panel IO event data
+ */
+typedef struct {
+} esp_lcd_panel_io_event_data_t;
+
+/**
+ * @brief Declare the prototype of the function that will be invoked when panel IO finishes transferring color data
+ *
+ * @param[in] panel_io LCD panel IO handle, which is created by factory API like `esp_lcd_new_panel_io_spi()`
+ * @param[in] edata Panel IO event data, fed by driver
+ * @param[in] user_ctx User data, passed from `esp_lcd_panel_io_xxx_config_t`
+ * @return Whether a high priority task has been waken up by this function
+ */
+typedef bool (*esp_lcd_panel_io_color_trans_done_cb_t)(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_io_event_data_t *edata, void *user_ctx);
+
+/**
+ * @brief Type of LCD panel IO callbacks
+ */
+typedef struct {
+    esp_lcd_panel_io_color_trans_done_cb_t on_color_trans_done; /*!< Callback invoked when color data transfer has finished */
+} esp_lcd_panel_io_callbacks_t;
+
+
 /**
  * @brief Transmit LCD command and receive corresponding parameters
  *
@@ -85,20 +109,16 @@ esp_err_t esp_lcd_panel_io_tx_color(esp_lcd_panel_io_handle_t io, int lcd_cmd, c
 esp_err_t esp_lcd_panel_io_del(esp_lcd_panel_io_handle_t io);
 
 /**
- * @brief Type of LCD panel IO event data
+ * @brief Register LCD panel IO callbacks
- */
-typedef struct {
-} esp_lcd_panel_io_event_data_t;
-
-/**
- * @brief Declare the prototype of the function that will be invoked when panel IO finishes transferring color data
  *
- * @param[in] panel_io LCD panel IO handle, which is created by factory API like `esp_lcd_new_panel_io_spi()`
+ * @param[in] io LCD panel IO handle, which is created by factory API like `esp_lcd_new_panel_io_spi()`
- * @param[in] edata Panel IO event data, fed by driver
+ * @param[in] cbs structure with all LCD panel IO callbacks
- * @param[in] user_ctx User data, passed from `esp_lcd_panel_io_xxx_config_t`
+ * @param[in] user_ctx User private data, passed directly to callback's user_ctx
- * @return Whether a high priority task has been waken up by this function
+ * @return
+ *          - ESP_ERR_INVALID_ARG   if parameter is invalid
+ *          - ESP_OK                on success
  */
-typedef bool (*esp_lcd_panel_io_color_trans_done_cb_t)(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_io_event_data_t *edata, void *user_ctx);
+esp_err_t esp_lcd_panel_io_register_event_callbacks(esp_lcd_panel_io_handle_t io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx);
 
 /**
  * @brief Panel IO configuration structure, for SPI interface

components/esp_lcd/interface/esp_lcd_panel_io_interface.h

@@ -7,6 +7,7 @@
 
 #include <stdbool.h>
 #include "esp_err.h"
+#include "esp_lcd_panel_io.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -73,6 +74,18 @@ struct esp_lcd_panel_io_t {
      *          - ESP_OK                on success
      */
     esp_err_t (*del)(esp_lcd_panel_io_t *io);
+
+    /**
+     * @brief Register LCD panel IO callbacks
+     *
+     * @param[in] io LCD panel IO handle, which is created by factory API like `esp_lcd_new_panel_io_spi()`
+     * @param[in] cbs structure with all LCD panel IO callbacks
+     * @param[in] user_ctx User private data, passed directly to callback's user_ctx
+     * @return
+     *          - ESP_ERR_INVALID_ARG   if parameter is invalid
+     *          - ESP_OK                on success
+     */
+    esp_err_t (*register_event_callbacks)(esp_lcd_panel_io_t *io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx);
 };
 
 #ifdef __cplusplus

components/esp_lcd/src/esp_lcd_panel_io.c

@@ -34,3 +34,10 @@ esp_err_t esp_lcd_panel_io_del(esp_lcd_panel_io_handle_t io)
     ESP_RETURN_ON_FALSE(io, ESP_ERR_INVALID_ARG, TAG, "invalid panel io handle");
     return io->del(io);
 }
+
+esp_err_t esp_lcd_panel_io_register_event_callbacks(esp_lcd_panel_io_handle_t io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx)
+{
+    ESP_RETURN_ON_FALSE(io, ESP_ERR_INVALID_ARG, TAG, "invalid panel io handle");
+    ESP_RETURN_ON_FALSE(cbs, ESP_ERR_INVALID_ARG, TAG, "invalid callbacks structure");
+    return io->register_event_callbacks(io, cbs, user_ctx);
+}

components/esp_lcd/src/esp_lcd_panel_io_i2c.c

@@ -29,6 +29,7 @@ static esp_err_t panel_io_i2c_del(esp_lcd_panel_io_t *io);
 static esp_err_t panel_io_i2c_rx_param(esp_lcd_panel_io_t *io, int lcd_cmd, void *param, size_t param_size);
 static esp_err_t panel_io_i2c_tx_param(esp_lcd_panel_io_t *io, int lcd_cmd, const void *param, size_t param_size);
 static esp_err_t panel_io_i2c_tx_color(esp_lcd_panel_io_t *io, int lcd_cmd, const void *color, size_t color_size);
+static esp_err_t panel_io_i2c_register_event_callbacks(esp_lcd_panel_io_handle_t io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx);
 
 typedef struct {
     esp_lcd_panel_io_t base; // Base class of generic lcd panel io
@@ -69,6 +70,7 @@ esp_err_t esp_lcd_new_panel_io_i2c(esp_lcd_i2c_bus_handle_t bus, const esp_lcd_p
     i2c_panel_io->base.rx_param = panel_io_i2c_rx_param;
     i2c_panel_io->base.tx_param = panel_io_i2c_tx_param;
     i2c_panel_io->base.tx_color = panel_io_i2c_tx_color;
+    i2c_panel_io->base.register_event_callbacks = panel_io_i2c_register_event_callbacks;
     *ret_io = &(i2c_panel_io->base);
     ESP_LOGD(TAG, "new i2c lcd panel io @%p", i2c_panel_io);
 
@@ -87,6 +89,20 @@ static esp_err_t panel_io_i2c_del(esp_lcd_panel_io_t *io)
     return ret;
 }
 
+static esp_err_t panel_io_i2c_register_event_callbacks(esp_lcd_panel_io_handle_t io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx)
+{
+    lcd_panel_io_i2c_t *i2c_panel_io = __containerof(io, lcd_panel_io_i2c_t, base);
+
+    if(i2c_panel_io->on_color_trans_done != NULL) {
+        ESP_LOGW(TAG, "Callback on_color_trans_done was already set and now it was owerwritten!");
+    }
+
+    i2c_panel_io->on_color_trans_done = cbs->on_color_trans_done;
+    i2c_panel_io->user_ctx = user_ctx;
+
+    return ESP_OK;
+}
+
 static esp_err_t panel_io_i2c_rx_buffer(esp_lcd_panel_io_t *io, int lcd_cmd, void *buffer, size_t buffer_size)
 {
     esp_err_t ret = ESP_OK;

components/esp_lcd/src/esp_lcd_panel_io_i2s.c

@@ -58,6 +58,7 @@ static esp_err_t i2s_lcd_configure_gpio(esp_lcd_i80_bus_handle_t bus, const esp_
 static void i2s_lcd_trigger_quick_trans_done_event(esp_lcd_i80_bus_handle_t bus);
 static void lcd_i80_switch_devices(lcd_panel_io_i80_t *cur_device, lcd_panel_io_i80_t *next_device);
 static void lcd_default_isr_handler(void *args);
+static esp_err_t panel_io_i80_register_event_callbacks(esp_lcd_panel_io_handle_t io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx);
 
 struct esp_lcd_i80_bus_t {
     int bus_id;            // Bus ID, index from 0
@@ -295,6 +296,7 @@ esp_err_t esp_lcd_new_panel_io_i80(esp_lcd_i80_bus_handle_t bus, const esp_lcd_p
     i80_device->base.del = panel_io_i80_del;
     i80_device->base.tx_param = panel_io_i80_tx_param;
     i80_device->base.tx_color = panel_io_i80_tx_color;
+    i80_device->base.register_event_callbacks = panel_io_i80_register_event_callbacks;
     if (io_config->cs_gpio_num >= 0) {
         // CS signal is controlled by software
         gpio_set_level(io_config->cs_gpio_num, !io_config->flags.cs_active_high); // de-assert by default
@@ -342,6 +344,20 @@ static esp_err_t panel_io_i80_del(esp_lcd_panel_io_t *io)
     return ESP_OK;
 }
 
+static esp_err_t panel_io_i80_register_event_callbacks(esp_lcd_panel_io_handle_t io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx)
+{
+    lcd_panel_io_i80_t *i80_device = __containerof(io, lcd_panel_io_i80_t, base);
+
+    if(i80_device->on_color_trans_done != NULL) {
+        ESP_LOGW(TAG, "Callback on_color_trans_done was already set and now it was owerwritten!");
+    }
+
+    i80_device->on_color_trans_done = cbs->on_color_trans_done;
+    i80_device->user_ctx = user_ctx;
+
+    return ESP_OK;
+}
+
 static void i2s_lcd_prepare_cmd_buffer(lcd_i80_trans_descriptor_t *trans_desc, const void *cmd)
 {
     lcd_panel_io_i80_t *i80_device = trans_desc->i80_device;

components/esp_lcd/src/esp_lcd_panel_io_i80.c

@@ -56,6 +56,7 @@ static esp_err_t lcd_i80_bus_configure_gpio(esp_lcd_i80_bus_handle_t bus, const
 static void lcd_i80_switch_devices(lcd_panel_io_i80_t *cur_device, lcd_panel_io_i80_t *next_device);
 static void lcd_start_transaction(esp_lcd_i80_bus_t *bus, lcd_i80_trans_descriptor_t *trans_desc);
 static void lcd_default_isr_handler(void *args);
+static esp_err_t panel_io_i80_register_event_callbacks(esp_lcd_panel_io_handle_t io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx);
 
 struct esp_lcd_i80_bus_t {
     int bus_id;            // Bus ID, index from 0
@@ -285,6 +286,7 @@ esp_err_t esp_lcd_new_panel_io_i80(esp_lcd_i80_bus_handle_t bus, const esp_lcd_p
     i80_device->base.del = panel_io_i80_del;
     i80_device->base.tx_param = panel_io_i80_tx_param;
     i80_device->base.tx_color = panel_io_i80_tx_color;
+    i80_device->base.register_event_callbacks = panel_io_i80_register_event_callbacks;
     // we only configure the CS GPIO as output, don't connect to the peripheral signal at the moment
     // we will connect the CS GPIO to peripheral signal when switching devices in lcd_i80_switch_devices()
     if (io_config->cs_gpio_num >= 0) {
@@ -333,6 +335,20 @@ static esp_err_t panel_io_i80_del(esp_lcd_panel_io_t *io)
     return ESP_OK;
 }
 
+static esp_err_t panel_io_i80_register_event_callbacks(esp_lcd_panel_io_handle_t io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx)
+{
+    lcd_panel_io_i80_t *i80_device = __containerof(io, lcd_panel_io_i80_t, base);
+
+    if(i80_device->on_color_trans_done != NULL) {
+        ESP_LOGW(TAG, "Callback on_color_trans_done was already set and now it was owerwritten!");
+    }
+
+    i80_device->on_color_trans_done = cbs->on_color_trans_done;
+    i80_device->user_ctx = user_ctx;
+
+    return ESP_OK;
+}
+
 static void i80_lcd_prepare_cmd_buffer(esp_lcd_i80_bus_t *bus, lcd_panel_io_i80_t *i80_device, void *lcd_cmd)
 {
     uint8_t *from = (uint8_t *)lcd_cmd;

components/esp_lcd/src/esp_lcd_panel_io_spi.c

@@ -32,6 +32,7 @@ static esp_err_t panel_io_spi_tx_color(esp_lcd_panel_io_t *io, int lcd_cmd, cons
 static esp_err_t panel_io_spi_del(esp_lcd_panel_io_t *io);
 static void lcd_spi_pre_trans_cb(spi_transaction_t *trans);
 static void lcd_spi_post_trans_color_cb(spi_transaction_t *trans);
+static esp_err_t panel_io_spi_register_event_callbacks(esp_lcd_panel_io_handle_t io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx);
 
 typedef struct {
     spi_transaction_t base;
@@ -78,7 +79,7 @@ esp_err_t esp_lcd_new_panel_io_spi(esp_lcd_spi_bus_handle_t bus, const esp_lcd_p
         .spics_io_num = io_config->cs_gpio_num,
         .queue_size = io_config->trans_queue_depth,
         .pre_cb = lcd_spi_pre_trans_cb, // pre-transaction callback, mainly control DC gpio level
-        .post_cb = io_config->on_color_trans_done ? lcd_spi_post_trans_color_cb : NULL, // post-transaction, where we invoke user registered "on_color_trans_done()"
+        .post_cb = lcd_spi_post_trans_color_cb, // post-transaction, where we invoke user registered "on_color_trans_done()"
     };
     ret = spi_bus_add_device((spi_host_device_t)bus, &devcfg, &spi_panel_io->spi_dev);
     ESP_GOTO_ON_ERROR(ret, err, TAG, "adding spi device to bus failed");
@@ -104,6 +105,7 @@ esp_err_t esp_lcd_new_panel_io_spi(esp_lcd_spi_bus_handle_t bus, const esp_lcd_p
     spi_panel_io->base.tx_param = panel_io_spi_tx_param;
     spi_panel_io->base.tx_color = panel_io_spi_tx_color;
     spi_panel_io->base.del = panel_io_spi_del;
+    spi_panel_io->base.register_event_callbacks = panel_io_spi_register_event_callbacks;
     *ret_io = &(spi_panel_io->base);
     ESP_LOGD(TAG, "new spi lcd panel io @%p", spi_panel_io);
 
@@ -143,6 +145,20 @@ err:
     return ret;
 }
 
+static esp_err_t panel_io_spi_register_event_callbacks(esp_lcd_panel_io_handle_t io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx)
+{
+    esp_lcd_panel_io_spi_t *spi_panel_io = __containerof(io, esp_lcd_panel_io_spi_t, base);
+
+    if(spi_panel_io->on_color_trans_done != NULL) {
+        ESP_LOGW(TAG, "Callback on_color_trans_done was already set and now it was owerwritten!");
+    }
+
+    spi_panel_io->on_color_trans_done = cbs->on_color_trans_done;
+    spi_panel_io->user_ctx = user_ctx;
+
+    return ESP_OK;
+}
+
 static void spi_lcd_prepare_cmd_buffer(esp_lcd_panel_io_spi_t *panel_io, const void *cmd)
 {
     uint8_t *from = (uint8_t *)cmd;