drivers: video: add VIDEO_BUFFER_ZEPHYR_REGION for pool section

Add a Kconfig option in order to indicate in which Zephyr
memory-region the video buffer pool should be stored.

Signed-off-by: Alain Volmat <[email protected]>

Author: Alain Volmat

drivers/video/Kconfig

@@ -35,6 +35,19 @@ config VIDEO_BUFFER_POOL_ALIGN
 	int "Alignment of the video pool’s buffer"
 	default 64
 
+config VIDEO_BUFFER_ZEPHYR_REGION
+	bool "Place video pool in a Zephyr memory-region"
+	help
+	  Place the video pool in a section, automatically
+	  creating from a 'zephyr,memory-region' compatible node,
+	  whose name is specified in VIDEO_BUFFER_ZEPHYR_REGION_NAME.
+
+config VIDEO_BUFFER_ZEPHYR_REGION_NAME
+	string "Name of the zephyr memory-region for video pool"
+	depends on VIDEO_BUFFER_ZEPHYR_REGION
+	help
+	  Name of the Zephyr memory-region where video pool is placed.
+
 config VIDEO_BUFFER_USE_SHARED_MULTI_HEAP
 	bool "Use shared multi heap for video buffer"
 	default n

drivers/video/video_common.c

@@ -27,8 +27,14 @@ LOG_MODULE_REGISTER(video_common, CONFIG_VIDEO_LOG_LEVEL);
 	shared_multi_heap_aligned_alloc(CONFIG_VIDEO_BUFFER_SMH_ATTRIBUTE, align, size)
 #define VIDEO_COMMON_FREE(block) shared_multi_heap_free(block)
 #else
+#if defined(CONFIG_VIDEO_BUFFER_ZEPHYR_REGION)
+Z_HEAP_DEFINE_IN_SECT(video_buffer_pool,
+		      CONFIG_VIDEO_BUFFER_POOL_SZ_MAX * CONFIG_VIDEO_BUFFER_POOL_NUM_MAX,
+		      Z_GENERIC_SECTION(CONFIG_VIDEO_BUFFER_ZEPHYR_REGION_NAME));
+#else
 K_HEAP_DEFINE(video_buffer_pool,
-		CONFIG_VIDEO_BUFFER_POOL_SZ_MAX * CONFIG_VIDEO_BUFFER_POOL_NUM_MAX);
+	      CONFIG_VIDEO_BUFFER_POOL_SZ_MAX * CONFIG_VIDEO_BUFFER_POOL_NUM_MAX);
+#endif
 #define VIDEO_COMMON_HEAP_ALLOC(align, size, timeout)                                              \
 	k_heap_aligned_alloc(&video_buffer_pool, align, size, timeout);
 #define VIDEO_COMMON_FREE(block) k_heap_free(&video_buffer_pool, block)