feat(tjpegd): add logs on errors (#9841)

Co-authored-by: YZ <104435201+YanZ256@users.noreply.github.com>
Co-authored-by: cubic-dev-ai[bot] <191113872+cubic-dev-ai[bot]@users.noreply.github.com>

src/libs/tjpgd/lv_tjpgd.c

@@ -200,6 +200,7 @@ static lv_result_t decoder_open(lv_image_decoder_t * decoder, lv_image_decoder_d
         lv_free(f);
         lv_free(workb_temp);
         lv_free(jd);
+        LV_LOG_WARN("jd_prepare error: %d", rc);
         return LV_RESULT_INVALID;
     }
 
@@ -240,7 +241,10 @@ static lv_result_t decoder_get_area(lv_image_decoder_t * decoder, lv_image_decod
         else {
             lv_fs_seek(jd->device, 0, LV_FS_SEEK_SET);
             JRESULT rc = jd_prepare(jd, input_func, jd->pool_original, (size_t)TJPGD_WORKBUFF_SIZE, jd->device);
-            if(rc) return LV_RESULT_INVALID;
+            if(rc) {
+                LV_LOG_WARN("jd_prepare error: %d", rc);
+                return LV_RESULT_INVALID;
+            }
         }
         decoded->data = jd->workbuf;
         decoded->header = dsc->header;
@@ -268,17 +272,26 @@ static lv_result_t decoder_get_area(lv_image_decoder_t * decoder, lv_image_decod
     JRESULT rc;
     if(jd->nrst && jd->rst++ == jd->nrst) {
         rc = jd_restart(jd, jd->rsc++);
-        if(rc != JDR_OK) return LV_RESULT_INVALID;
+        if(rc != JDR_OK) {
+            LV_LOG_WARN("jd_restart error: %d", rc);
+            return LV_RESULT_INVALID;
+        }
         jd->rst = 1;
     }
 
     /* Load an MCU (decompress huffman coded stream, dequantize and apply IDCT) */
     rc = jd_mcu_load(jd);
-    if(rc != JDR_OK) return LV_RESULT_INVALID;
+    if(rc != JDR_OK) {
+        LV_LOG_WARN("jd_mcu_load error: %d", rc);
+        return LV_RESULT_INVALID;
+    }
 
     /* Output the MCU (YCbCr to RGB, scaling and output) */
     rc = jd_mcu_output(jd, NULL, decoded_area->x1, decoded_area->y1);
-    if(rc != JDR_OK) return LV_RESULT_INVALID;
+    if(rc != JDR_OK) {
+        LV_LOG_WARN("jd_mcu_output error: %d", rc);
+        return LV_RESULT_INVALID;
+    }
 
     return LV_RESULT_OK;
 }