drivers: display: extend support for renesas,ra-glcdc driver

Change pinctrl-0 dts prop as optional in case DSI display is used
Add these APIs support: set_brightness, set_contrast, get_framebuffer
Add a new config to select frame buffer section

Signed-off-by: Danh Doan <danh.doan.ue@bp.renesas.com>

Author: Danh Doan

boards/renesas/ek_ra8d1/Kconfig.defconfig

@@ -1,4 +1,4 @@
-# Copyright (c) 2024 Renesas Electronics Corporation
+# Copyright (c) 2024-2025 Renesas Electronics Corporation
 # SPDX-License-Identifier: Apache-2.0
 
 if BOARD_EK_RA8D1
@@ -10,18 +10,26 @@ config NET_L2_ETHERNET
 
 endif # NETWORKING
 
+if DISPLAY
+
 if SHIELD_RTKMIPILCDB00000BE
 
 config MEMC
 	default y
 
+config RENESAS_RA_GLCDC_FRAME_BUFFER_SECTION
+	default ".sdram"
+	depends on RENESAS_RA_GLCDC
+
+endif # SHIELD_RTKMIPILCDB00000BE
+
+endif # DISPLAY
+
 if LVGL
 
 config LV_Z_VDB_CUSTOM_SECTION
 	default y
 
 endif # LVGL
 
-endif # SHIELD_RTKMIPILCDB00000BE
-
 endif # BOARD_EK_RA8D1

drivers/display/Kconfig.renesas_ra

@@ -1,6 +1,6 @@
 # Renesas RA Family
 
-# Copyright (c) 2024 Renesas Electronics Corporation
+# Copyright (c) 2024-2025 Renesas Electronics Corporation
 # SPDX-License-Identifier: Apache-2.0
 
 config RENESAS_RA_GLCDC
@@ -23,6 +23,14 @@ config RENESAS_RA_GLCDC_FB_NUM
 	    - 1 single frame buffer in RENESAS RA GLCDC driver.
 	    - 2 double frame buffer in RENESAS RA GLCDC driver.
 
+config RENESAS_RA_GLCDC_FRAME_BUFFER_SECTION
+	string "RAM memory section to place frame buffer"
+	depends on RENESAS_RA_GLCDC_FB_NUM > 0
+	help
+	  RAM memory section name to place frame buffer.
+	  Example: to place display frame buffer in external SDRAM (.sdram section)
+	    CONFIG_RENESAS_RA_GLCDC_FRAME_BUFFER_SECTION=".sdram"
+
 if LVGL
 
 # Force display buffers to be aligned to cache line size (64 bytes)