fix(vg_lite): fix incorrect cache operation (#6054)

Signed-off-by: pengyiqiang <pengyiqiang@xiaomi.com>
Co-authored-by: pengyiqiang <pengyiqiang@xiaomi.com>

src/draw/lv_draw_buf.c

@@ -33,6 +33,7 @@ static void * draw_buf_malloc(const lv_draw_buf_handlers_t * handler, size_t siz
 static void draw_buf_free(const lv_draw_buf_handlers_t * handler, void * buf);
 static uint32_t width_to_stride(uint32_t w, lv_color_format_t color_format);
 static uint32_t _calculate_draw_buf_size(uint32_t w, uint32_t h, lv_color_format_t cf, uint32_t stride);
+static void draw_buf_get_full_area(const lv_draw_buf_t * draw_buf, lv_area_t * full_area);
 
 /**********************
  *  STATIC VARIABLES
@@ -54,14 +55,15 @@ void _lv_draw_buf_init_handlers(void)
 
 void lv_draw_buf_init_with_default_handlers(lv_draw_buf_handlers_t * handlers)
 {
-    lv_draw_buf_init_handlers(handlers, buf_malloc, buf_free, buf_align, NULL, width_to_stride);
+    lv_draw_buf_init_handlers(handlers, buf_malloc, buf_free, buf_align, NULL, NULL, width_to_stride);
 }
 
 void lv_draw_buf_init_handlers(lv_draw_buf_handlers_t * handlers,
                                lv_draw_buf_malloc_cb buf_malloc_cb,
                                lv_draw_buf_free_cb buf_free_cb,
                                lv_draw_buf_align_cb align_pointer_cb,
-                               lv_draw_buf_invalidate_cache_cb invalidate_cache_cb,
+                               lv_draw_buf_cache_operation_cb invalidate_cache_cb,
+                               lv_draw_buf_cache_operation_cb flush_cache_cb,
                                lv_draw_buf_width_to_stride_cb width_to_stride_cb)
 {
     lv_memzero(handlers, sizeof(lv_draw_buf_handlers_t));
@@ -69,6 +71,7 @@ void lv_draw_buf_init_handlers(lv_draw_buf_handlers_t * handlers,
     handlers->buf_free_cb = buf_free_cb;
     handlers->align_pointer_cb = align_pointer_cb;
     handlers->invalidate_cache_cb = invalidate_cache_cb;
+    handlers->flush_cache_cb = flush_cache_cb;
     handlers->width_to_stride_cb = width_to_stride_cb;
 }
 
@@ -108,18 +111,42 @@ void lv_draw_buf_invalidate_cache(const lv_draw_buf_t * draw_buf, const lv_area_
 void lv_draw_buf_invalidate_cache_user(const lv_draw_buf_handlers_t * handlers, const lv_draw_buf_t * draw_buf,
                                        const lv_area_t * area)
 {
-    if(handlers->invalidate_cache_cb) {
-        LV_ASSERT_NULL(draw_buf);
-        const lv_image_header_t * header = &draw_buf->header;
-        lv_area_t full;
-        if(area == NULL) {
-            full = (lv_area_t) {
-                0, 0, header->w - 1, header->h - 1
-            };
-            area = &full;
-        }
-        handlers->invalidate_cache_cb(draw_buf, area);
+    LV_ASSERT_NULL(draw_buf);
+
+    if(!handlers->invalidate_cache_cb) {
+        return;
     }
+
+    lv_area_t full;
+    if(area == NULL) {
+        draw_buf_get_full_area(draw_buf, &full);
+        area = &full;
+    }
+
+    handlers->invalidate_cache_cb(draw_buf, area);
+}
+
+void lv_draw_buf_flush_cache(const lv_draw_buf_t * draw_buf, const lv_area_t * area)
+{
+    lv_draw_buf_flush_cache_user(&default_handlers, draw_buf, area);
+}
+
+void lv_draw_buf_flush_cache_user(const lv_draw_buf_handlers_t * handlers, const lv_draw_buf_t * draw_buf,
+                                  const lv_area_t * area)
+{
+    LV_ASSERT_NULL(draw_buf);
+
+    if(!handlers->flush_cache_cb) {
+        return;
+    }
+
+    lv_area_t full;
+    if(area == NULL) {
+        draw_buf_get_full_area(draw_buf, &full);
+        area = &full;
+    }
+
+    handlers->flush_cache_cb(draw_buf, area);
 }
 
 void lv_draw_buf_clear(lv_draw_buf_t * draw_buf, const lv_area_t * a)
@@ -569,3 +596,9 @@ static uint32_t _calculate_draw_buf_size(uint32_t w, uint32_t h, lv_color_format
 
     return size;
 }
+
+static void draw_buf_get_full_area(const lv_draw_buf_t * draw_buf, lv_area_t * full_area)
+{
+    const lv_image_header_t * header = &draw_buf->header;
+    lv_area_set(full_area, 0, 0, header->w - 1, header->h - 1);
+}

src/draw/lv_draw_buf.h

@@ -76,7 +76,7 @@ typedef void (*lv_draw_buf_free_cb)(void * draw_buf);
 
 typedef void * (*lv_draw_buf_align_cb)(void * buf, lv_color_format_t color_format);
 
-typedef void (*lv_draw_buf_invalidate_cache_cb)(const lv_draw_buf_t * draw_buf, const lv_area_t * area);
+typedef void (*lv_draw_buf_cache_operation_cb)(const lv_draw_buf_t * draw_buf, const lv_area_t * area);
 
 typedef uint32_t (*lv_draw_buf_width_to_stride_cb)(uint32_t w, lv_color_format_t color_format);
 
@@ -84,7 +84,8 @@ typedef struct {
     lv_draw_buf_malloc_cb buf_malloc_cb;
     lv_draw_buf_free_cb buf_free_cb;
     lv_draw_buf_align_cb align_pointer_cb;
-    lv_draw_buf_invalidate_cache_cb invalidate_cache_cb;
+    lv_draw_buf_cache_operation_cb invalidate_cache_cb;
+    lv_draw_buf_cache_operation_cb flush_cache_cb;
     lv_draw_buf_width_to_stride_cb width_to_stride_cb;
 } lv_draw_buf_handlers_t;
 
@@ -118,7 +119,8 @@ void lv_draw_buf_init_handlers(lv_draw_buf_handlers_t * handlers,
                                lv_draw_buf_malloc_cb buf_malloc_cb,
                                lv_draw_buf_free_cb buf_free_cb,
                                lv_draw_buf_align_cb align_pointer_cb,
-                               lv_draw_buf_invalidate_cache_cb invalidate_cache_cb,
+                               lv_draw_buf_cache_operation_cb invalidate_cache_cb,
+                               lv_draw_buf_cache_operation_cb flush_cache_cb,
                                lv_draw_buf_width_to_stride_cb width_to_stride_cb);
 
 /**
@@ -162,6 +164,23 @@ void lv_draw_buf_invalidate_cache(const lv_draw_buf_t * draw_buf, const lv_area_
 void lv_draw_buf_invalidate_cache_user(const lv_draw_buf_handlers_t * handlers, const lv_draw_buf_t * draw_buf,
                                        const lv_area_t * area);
 
+/**
+ * Flush the cache of the buffer
+ * @param draw_buf     the draw buffer needs to be flushed
+ * @param area         the area to flush in the buffer,
+ *                     use NULL to flush the whole draw buffer address range
+ */
+void lv_draw_buf_flush_cache(const lv_draw_buf_t * draw_buf, const lv_area_t * area);
+
+/**
+ * Flush the cache of the buffer using the user-defined callback
+ * @param handlers     the draw buffer handlers
+ * @param draw_buf     the draw buffer needs to be flushed
+ * @param area         the area to flush in the buffer,
+ */
+void lv_draw_buf_flush_cache_user(const lv_draw_buf_handlers_t * handlers, const lv_draw_buf_t * draw_buf,
+                                  const lv_area_t * area);
+
 /**
  * Calculate the stride in bytes based on a width and color format
  * @param w                 the width in pixels

src/draw/lv_image_decoder.c

@@ -112,6 +112,7 @@ lv_result_t lv_image_decoder_open(lv_image_decoder_dsc_t * dsc, const void * src
         .premultiply = false,
         .no_cache = false,
         .use_indexed = false,
+        .flush_cache = false,
     };
 
     /*
@@ -121,6 +122,18 @@ lv_result_t lv_image_decoder_open(lv_image_decoder_dsc_t * dsc, const void * src
      * */
     lv_result_t res = dsc->decoder->open_cb(dsc->decoder, dsc);
 
+    /* Flush the D-Cache if enabled and the image was successfully opened */
+    if(dsc->args.flush_cache && res == LV_RESULT_OK) {
+        lv_draw_buf_flush_cache(dsc->decoded, NULL);
+        LV_LOG_INFO("Flushed D-cache: src %p (%s) (W%" LV_PRId32 " x H%" LV_PRId32 ", data: %p cf: %d)",
+                    src,
+                    dsc->src_type == LV_IMAGE_SRC_FILE ? (const char *)src : "c-array",
+                    dsc->decoded->header.w,
+                    dsc->decoded->header.h,
+                    dsc->decoded->data,
+                    dsc->decoded->header.cf);
+    }
+
     return res;
 }
 

src/draw/lv_image_decoder.h

@@ -62,6 +62,7 @@ typedef struct _lv_image_decoder_args_t {
     bool premultiply;       /*Whether image should be premultiplied or not after decoding*/
     bool no_cache;          /*When set, decoded image won't be put to cache, and decoder open will also ignore cache.*/
     bool use_indexed;       /*Decoded indexed image as is. Convert to ARGB8888 if false.*/
+    bool flush_cache;       /*Whether to flush the data cache after decoding*/
 } lv_image_decoder_args_t;
 
 /**

src/draw/vg_lite/lv_vg_lite_decoder.c

@@ -248,11 +248,6 @@ static lv_result_t decoder_open_variable(lv_image_decoder_t * decoder, lv_image_
         dest += dest_stride;
     }
 
-    /* invalidate D-Cache */
-    lv_draw_buf_invalidate_cache(draw_buf, NULL);
-    LV_LOG_INFO("image %p (W%" LV_PRId32 " x H%" LV_PRId32 ", buffer: %p, cf: %d) decode finish",
-                image_data, width, height, draw_buf->data, src_cf);
-
     return LV_RESULT_OK;
 }
 
@@ -345,12 +340,6 @@ static lv_result_t decoder_open_file(lv_image_decoder_t * decoder, lv_image_deco
     lv_free(src_temp);
 
     lv_fs_close(&file);
-
-    /* invalidate D-Cache */
-    lv_draw_buf_invalidate_cache(draw_buf, NULL);
-
-    LV_LOG_INFO("image %s (W%" LV_PRId32 " x H%" LV_PRId32 ", buffer: %p cf: %d) decode finish",
-                path, width, height, draw_buf->data, src_header.cf);
     return LV_RESULT_OK;
 
 failed:

src/draw/vg_lite/lv_vg_lite_utils.c

@@ -629,6 +629,7 @@ bool lv_vg_lite_buffer_open_image(vg_lite_buffer_t * buffer, lv_image_decoder_ds
     args.stride_align = true;
     args.use_indexed = true;
     args.no_cache = no_cache;
+    args.flush_cache = true;
 
     lv_result_t res = lv_image_decoder_open(decoder_dsc, src, &args);
     if(res != LV_RESULT_OK) {

src/drivers/nuttx/lv_nuttx_cache.c

@@ -27,6 +27,7 @@
  **********************/
 
 static void invalidate_cache(const lv_draw_buf_t * draw_buf, const lv_area_t * area);
+static void flush_cache(const lv_draw_buf_t * draw_buf, const lv_area_t * area);
 
 /**********************
  *  STATIC VARIABLES
@@ -44,28 +45,44 @@ void lv_nuttx_cache_init(void)
 {
     lv_draw_buf_handlers_t * handlers = lv_draw_buf_get_handlers();
     handlers->invalidate_cache_cb = invalidate_cache;
+    handlers->flush_cache_cb = flush_cache;
 }
 
 /**********************
  *   STATIC FUNCTIONS
  **********************/
 
-static void invalidate_cache(const lv_draw_buf_t * draw_buf, const lv_area_t * area)
+static void draw_buf_to_region(
+    const lv_draw_buf_t * draw_buf, const lv_area_t * area,
+    lv_uintptr_t * start, lv_uintptr_t * end)
 {
     LV_ASSERT_NULL(draw_buf);
+    LV_ASSERT_NULL(area);
+    LV_ASSERT_NULL(start);
+    LV_ASSERT_NULL(end);
+
     void * buf = draw_buf->data;
     uint32_t stride = draw_buf->header.stride;
 
+    int32_t h = lv_area_get_height(area);
+    *start = (lv_uintptr_t)buf + area->y1 * stride;
+    *end = *start + h * stride;
+}
+
+static void invalidate_cache(const lv_draw_buf_t * draw_buf, const lv_area_t * area)
+{
     lv_uintptr_t start;
     lv_uintptr_t end;
-
-    int32_t h = lv_area_get_height(area);
-    start = (lv_uintptr_t)buf + area->y1 * stride;
-    end = start + h * stride;
-
-    LV_UNUSED(start);
-    LV_UNUSED(end);
+    draw_buf_to_region(draw_buf, area, &start, &end);
     up_invalidate_dcache(start, end);
 }
 
+static void flush_cache(const lv_draw_buf_t * draw_buf, const lv_area_t * area)
+{
+    lv_uintptr_t start;
+    lv_uintptr_t end;
+    draw_buf_to_region(draw_buf, area, &start, &end);
+    up_flush_dcache(start, end);
+}
+
 #endif /* LV_USE_NUTTX */