adc: port gh pr to current adc continuous mode driver

DMA EOF may happens per multiple dma descriptors, instead of only one.

Closes https://github.com/espressif/esp-idf/pull/11500

components/driver/deprecated/adc_dma_legacy.c

@@ -380,7 +380,6 @@ static IRAM_ATTR bool s_adc_dma_intr(adc_digi_context_t *adc_digi_ctx)
         }
 
         ret = xRingbufferSendFromISR(adc_digi_ctx->ringbuf_hdl, finished_buffer, finished_size, &taskAwoken);
-        adc_hal_read_desc_finish (&adc_digi_ctx->hal);
         if (ret == pdFALSE) {
             //ringbuffer overflow
             adc_digi_ctx->ringbuf_overflow_flag = 1;

components/esp_adc/adc_continuous.c

@@ -93,7 +93,6 @@ static bool s_adc_dma_intr(adc_continuous_ctx_t *adc_digi_ctx);
 
 #if SOC_GDMA_SUPPORTED
 static bool adc_dma_in_suc_eof_callback(gdma_channel_handle_t dma_chan, gdma_event_data_t *event_data, void *user_data);
-static bool adc_dma_descr_err_callback(gdma_channel_handle_t dma_chan, void *user_data);
 #else
 static void adc_dma_intr_handler(void *arg);
 #endif
@@ -207,8 +206,7 @@ esp_err_t adc_continuous_new_handle(const adc_continuous_handle_cfg_t *hdl_confi
     gdma_apply_strategy(adc_ctx->rx_dma_channel, &strategy_config);
 
     gdma_rx_event_callbacks_t cbs = {
-        .on_recv_eof = adc_dma_in_suc_eof_callback,
-        .on_descr_err = adc_dma_descr_err_callback
+        .on_recv_eof = adc_dma_in_suc_eof_callback
     };
     gdma_register_rx_event_callbacks(adc_ctx->rx_dma_channel, &cbs, adc_ctx);
 
@@ -296,12 +294,6 @@ static IRAM_ATTR bool adc_dma_in_suc_eof_callback(gdma_channel_handle_t dma_chan
     return s_adc_dma_intr(user_data);
 }
 
-static bool adc_dma_descr_err_callback(gdma_channel_handle_t dma_chan, void *user_data)
-{
-    ESP_EARLY_LOGE(ADC_TAG, "GDMA descriptor error occurred, probable ADC data loss, CPU load too high?");
-    return false;
-}
-
 #else
 static IRAM_ATTR void adc_dma_intr_handler(void *arg)
 {
@@ -340,7 +332,6 @@ static IRAM_ATTR bool s_adc_dma_intr(adc_continuous_ctx_t *adc_digi_ctx)
         }
 
         ret = xRingbufferSendFromISR(adc_digi_ctx->ringbuf_hdl, finished_buffer, finished_size, &taskAwoken);
-        adc_hal_read_desc_finish (&adc_digi_ctx->hal);
         need_yield |= (taskAwoken == pdTRUE);
 
         if (adc_digi_ctx->cbs.on_conv_done) {

components/hal/adc_hal.c

@@ -238,6 +238,7 @@ static void adc_hal_digi_dma_link_descriptors(dma_descriptor_t *desc, uint8_t *d
     HAL_ASSERT(((uint32_t)data_buf % 4) == 0);
     HAL_ASSERT((per_eof_size % 4) == 0);
     uint32_t n = 0;
+    dma_descriptor_t *desc_head = desc;
 
     while (eof_num--) {
         uint32_t eof_size = per_eof_size;
@@ -261,7 +262,7 @@ static void adc_hal_digi_dma_link_descriptors(dma_descriptor_t *desc, uint8_t *d
             n++;
         }
     }
-    desc[n-1].next = desc;
+    desc[n-1].next = desc_head;
 }
 
 void adc_hal_digi_start(adc_hal_dma_ctx_t *hal, uint8_t *data_buf)
@@ -316,15 +317,24 @@ adc_hal_dma_desc_status_t adc_hal_get_reading_result(adc_hal_dma_ctx_t *hal, con
 
     //Find the eof list start
     eof_desc = eof_desc->next;
+    eof_desc->dw0.owner = 1;
     buffer_start = eof_desc->buffer;
     eof_len += eof_desc->dw0.length;
+    if ((intptr_t)eof_desc == eof_desc_addr) {
+        goto valid;
+    }
 
     //Find the eof list end
     for (int i = 1; i < hal->eof_step; i++) {
         eof_desc = eof_desc->next;
+        eof_desc->dw0.owner = 1;
         eof_len += eof_desc->dw0.length;
+        if ((intptr_t)eof_desc == eof_desc_addr) {
+            goto valid;
+        }
     }
 
+valid:
     hal->cur_desc_ptr = eof_desc;
     *buffer = buffer_start;
     *len = eof_len;
@@ -332,11 +342,6 @@ adc_hal_dma_desc_status_t adc_hal_get_reading_result(adc_hal_dma_ctx_t *hal, con
     return ADC_HAL_DMA_DESC_VALID;
 }
 
-void adc_hal_read_desc_finish(adc_hal_dma_ctx_t *hal) {
-    // Allow DMA to re-use descriptor.
-    hal->cur_desc_ptr->dw0.owner = 1;
-}
-
 void adc_hal_digi_clr_intr(adc_hal_dma_ctx_t *hal, uint32_t mask)
 {
     adc_dma_ll_rx_clear_intr(hal->dev, hal->dma_chan, mask);

components/hal/include/hal/adc_hal.h

@@ -188,7 +188,7 @@ bool adc_hal_check_event(adc_hal_dma_ctx_t *hal, uint32_t mask);
 #endif
 
 /**
- * @brief Get the ADC reading result. Call adc_hal_read_desc_finish after using the descriptor.
+ * @brief Get the ADC reading result
  *
  * @param      hal           Context of the HAL
  * @param      eof_desc_addr The last descriptor that is finished by HW. Should be got from DMA
@@ -199,14 +199,6 @@ bool adc_hal_check_event(adc_hal_dma_ctx_t *hal, uint32_t mask);
  */
 adc_hal_dma_desc_status_t adc_hal_get_reading_result(adc_hal_dma_ctx_t *hal, const intptr_t eof_desc_addr, uint8_t **buffer, uint32_t *len);
 
-/**
- * @brief Finishes reading the current descriptor and frees it for repeated usage by DMA.
- *
- * @param      hal           Context of the HAL
- */
-void adc_hal_read_desc_finish(adc_hal_dma_ctx_t *hal);
-
-
 /**
  * @brief Clear interrupt
  *