Merge branch 'bugfix/fix_touch_curr_scan_workaround_on_p4_v5.5' into 'release/v5.5'

fix(esp32p4): P4 touch channel 14 failure fix (v5.5)

See merge request espressif/esp-idf!42922

Author: Jiang Jiang Jian

components/esp_driver_touch_sens/hw_ver3/touch_version_specific.c

@@ -63,6 +63,10 @@ void IRAM_ATTR touch_priv_default_intr_handler(void *arg)
     touch_base_event_data_t data;
     touch_ll_get_active_channel_mask(&data.status_mask);
     int ch_offset = touch_ll_get_current_meas_channel() - TOUCH_MIN_CHAN_ID;
+    if (ch_offset < 0 || ch_offset >= (int)SOC_TOUCH_SENSOR_NUM) {
+        /* Not a valid channel */
+        return;
+    }
     data.chan = g_touch->ch[ch_offset];
     /* If the channel is not registered, return directly */
     if (!data.chan) {

components/esp_driver_touch_sens/test_apps/touch_sens/main/test_touch_sens_common.c

@@ -252,3 +252,53 @@ TEST_CASE("touch_sens_active_inactive_test", "[touch]")
     TEST_ASSERT_EQUAL_INT32(touch_cnt, cb_data.active_count);
     TEST_ASSERT_EQUAL_INT32(touch_cnt, cb_data.inactive_count);
 }
+
+#if SOC_TOUCH_SENSOR_VERSION > 1
+TEST_CASE("touch_sens_current_meas_channel_test", "[touch]")
+{
+    touch_sensor_handle_t touch = NULL;
+    touch_channel_handle_t touch_chan = NULL;
+
+    touch_sensor_config_t sens_cfg = TOUCH_SENSOR_DEFAULT_BASIC_CONFIG(TOUCH_SAMPLE_CFG_NUM, s_sample_cfg);
+    TEST_ESP_OK(touch_sensor_new_controller(&sens_cfg, &touch));
+
+    /* Configuring the filter */
+    touch_sensor_filter_config_t filter_cfg = TOUCH_SENSOR_DEFAULT_FILTER_CONFIG();
+    TEST_ESP_OK(touch_sensor_config_filter(touch, &filter_cfg));
+
+    int err_chan[TOUCH_MAX_CHAN_ID - TOUCH_MIN_CHAN_ID + 1] = {[0 ...(TOUCH_MAX_CHAN_ID - TOUCH_MIN_CHAN_ID)] = -1};
+    int scan_times = 100;
+    uint32_t curr_chan[scan_times];
+    /* Loop all channels */
+    for (int ch_id = TOUCH_MIN_CHAN_ID; ch_id <= TOUCH_MAX_CHAN_ID; ch_id++) {
+        /* New a channel */
+        TEST_ESP_OK(touch_sensor_new_channel(touch, ch_id, &s_chan_cfg, &touch_chan));
+        TEST_ESP_OK(touch_sensor_enable(touch));
+        /* Trigger one-shot scanning to update the current measuring channel */
+        touch_sensor_trigger_oneshot_scanning(touch, 2000);
+
+        /* Read the current measuring channel for several times */
+        for (int i = 0; i < scan_times; i++) {
+            curr_chan[i] = touch_ll_get_current_meas_channel();
+            /* Check if the current measuring channel is the same as the channel id */
+            if (curr_chan[i] != ch_id) {
+                err_chan[ch_id - TOUCH_MIN_CHAN_ID] = curr_chan[i];
+            }
+        }
+        /* Check if there is any error */
+        TEST_ESP_OK(touch_sensor_disable(touch));
+        TEST_ESP_OK(touch_sensor_del_channel(touch_chan));
+    }
+    TEST_ESP_OK(touch_sensor_del_controller(touch));
+
+    /* Check if there is any error in the current measuring channel from any channel */
+    bool has_error = false;
+    for (int i = 0; i < TOUCH_MAX_CHAN_ID - TOUCH_MIN_CHAN_ID + 1; i++) {
+        if (err_chan[i] >= 0) {
+            ESP_LOGE("TOUCH_TEST", "actual channel is %d, but current measuring channel reads %d", i + TOUCH_MIN_CHAN_ID, err_chan[i]);
+            has_error = true;
+        }
+    }
+    TEST_ASSERT_FALSE(has_error);
+}
+#endif  // SOC_TOUCH_SENSOR_VERSION > 1

components/hal/esp32p4/include/hal/touch_sensor_ll.h

@@ -489,11 +489,7 @@ static inline void touch_ll_set_idle_channel_connect(touch_idle_conn_t type)
 __attribute__((always_inline))
 static inline uint32_t touch_ll_get_current_meas_channel(void)
 {
-    uint32_t curr_chan = LP_TOUCH.chn_status.scan_curr;
-    HAL_ASSERT(curr_chan < 14);
-    // Workaround: the curr channel read 0 when the actual channel is 14
-    curr_chan = curr_chan == 0 ? 14 : curr_chan;
-    return curr_chan;
+    return LP_TOUCH.chn_status.scan_curr;
 }
 
 /**