Adjust RAM configuration for nrf54h20 to optimize memory usage in video examples

Author: hathach

hw/bsp/nrf/boards/nrf54h20dk/board.cmake

@@ -1,7 +1,8 @@
 set(MCU_VARIANT nrf54h20)
 
 function(update_board TARGET)
-  # temporarily, 54h20 has multiple sram sections
+  # 32 KB primary RAM is too tight for memory-heavy examples (e.g. video YUY2
+  # framebuf). TODO: route static .bss to RAM00 (512 KB) and drop this.
   target_compile_definitions(${TARGET} PUBLIC
     CFG_EXAMPLE_VIDEO_READONLY
     )

hw/bsp/nrf/boards/nrf54h20dk/board.mk

@@ -1,6 +1,11 @@
 MCU_VARIANT = nrf54h20
 CFLAGS += -DNRF54H20_XXAA
 
+# 32 KB primary RAM is too tight for memory-heavy examples (e.g. video YUY2
+# framebuf). Match the CMake build (board.cmake) — TODO: route static .bss to
+# RAM00 (512 KB) and drop this.
+CFLAGS += -DCFG_EXAMPLE_VIDEO_READONLY
+
 # enable max3421 host driver for this board
 MAX3421_HOST = 1
 

hw/bsp/nrf/boards/nrf54lm20dk/board.cmake

@@ -2,7 +2,6 @@ set(MCU_VARIANT nrf54lm20a_enga)
 set(JLINK_DEVICE NRF54LM20A_M33)
 
 function(update_board TARGET)
-  target_compile_definitions(${TARGET} PUBLIC
-    CFG_EXAMPLE_VIDEO_READONLY
-    )
+  # No board-specific overrides needed — primary 256 KB RAM is plenty for
+  # memory-heavy examples (video YUY2 framebuf etc.).
 endfunction()