boot/xilinx-prebuilt: install pld.pdi to target

With the Versal Segmented Configuration, it is possible to load a PL bitstream
at run-time using the Linux fpgautil application.  Whenever Segmented
Configuration is used, both the boot.pdi and pld.pdi files will be available
to Buildroot.  For this reason, this patch improves the user experience by
installing the pld.pdi file to the target file system for run-time loading
whenever Versal Segemented Configuration is used.

If the fpgautil application is available in the target file system, it can
be used for loading the pld.pdi using the target command below.

fpgautil -b /lib/firmware/xilinx/*_pld.pdi

The source code for the fpgautil application can be found here:
https://github.com/Xilinx/meta-xilinx/blob/master/meta-xilinx-core/recipes-bsp/fpga-manager-script/files/fpgautil.c

Along with usage details:
https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/1188397412/Solution+Versal+PL+Programming

Signed-off-by: Neal Frager <neal.frager@amd.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

boot/xilinx-prebuilt/Config.in

@@ -63,6 +63,15 @@ config BR2_TARGET_XILINX_PREBUILT_VERSAL_XSA_LOCATION
 
 endif # BR2_TARGET_XILINX_PREBUILT_VERSAL_XSA
 
+config BR2_TARGET_XILINX_PREBUILT_VERSAL_PLD_PDI
+	bool "install versal pld.pdi"
+	depends on BR2_TARGET_XILINX_PREBUILT_VERSAL
+	help
+	  When using the Versal Segmented Configuration, there is a
+	  pld.pdi file containing the FPGA bitstream which can be
+	  loaded at run-time.  By enabling this option, the pld.pdi
+	  will be installed to the target /lib/firmware/xilinx dir.
+
 config BR2_TARGET_XILINX_PREBUILT_FAMILY
 	string
 	default "zynqmp" if BR2_TARGET_XILINX_PREBUILT_ZYNQMP

boot/xilinx-prebuilt/xilinx-prebuilt.mk

@@ -19,7 +19,6 @@ XILINX_PREBUILT_LICENSE = MIT
 XILINX_PREBUILT_LICENSE_FILES = LICENSE
 endif # BR2_TARGET_XILINX_PREBUILT_VERSAL_XSA
 
-XILINX_PREBUILT_INSTALL_TARGET = NO
 XILINX_PREBUILT_INSTALL_IMAGES = YES
 
 XILINX_PREBUILT_FAMILY = $(call qstrip,$(BR2_TARGET_XILINX_PREBUILT_FAMILY))
@@ -48,6 +47,18 @@ define XILINX_PREBUILT_INSTALL_VERSAL_XSA_BOOT_PDI
 		) \
 		$(BINARIES_DIR)/boot.pdi
 endef
+
+ifeq ($(BR2_TARGET_XILINX_PREBUILT_VERSAL_PLD_PDI),y)
+# Install pld.pdi in target file system for run-time loading when using
+# Versal Segmented Configuration.
+define XILINX_PREBUILT_INSTALL_VERSAL_XSA_PLD_PDI
+	$(if $(wildcard $(@D)/*_pld.pdi),
+		mkdir -p $(TARGET_DIR)/lib/firmware/xilinx && \
+		$(INSTALL) -D -m 0644 $(@D)/*_pld.pdi \
+			$(TARGET_DIR)/lib/firmware/xilinx
+	)
+endef
+endif # BR2_TARGET_XILINX_PREBUILT_VERSAL_PLD_PDI
 else # BR2_TARGET_XILINX_PREBUILT_VERSAL_XSA
 XILINX_PREBUILT_PLM = $(XILINX_PREBUILT_BOARD_DIR)/plm.elf
 XILINX_PREBUILT_PSMFW = $(XILINX_PREBUILT_BOARD_DIR)/psmfw.elf
@@ -63,6 +74,18 @@ define XILINX_PREBUILT_INSTALL_VERSAL_BOOT_PDI
 		) \
 		$(BINARIES_DIR)/boot.pdi
 endef
+
+ifeq ($(BR2_TARGET_XILINX_PREBUILT_VERSAL_PLD_PDI),y)
+# Install pld.pdi in target file system for run-time loading when using
+# Versal Segmented Configuration.
+define XILINX_PREBUILT_INSTALL_VERSAL_PLD_PDI
+	$(if $(wildcard $(XILINX_PREBUILT_BOARD_DIR)/*_pld.pdi),
+		mkdir -p $(TARGET_DIR)/lib/firmware/xilinx && \
+		$(INSTALL) -D -m 0644 $(XILINX_PREBUILT_BOARD_DIR)/*_pld.pdi \
+			$(TARGET_DIR)/lib/firmware/xilinx
+	)
+endef
+endif # BR2_TARGET_XILINX_PREBUILT_VERSAL_PLD_PDI
 endif # BR2_TARGET_XILINX_PREBUILT_VERSAL_XSA
 
 ifneq ($(BR2_TARGET_XILINX_EMBEDDEDSW_VERSAL_PLM),y)
@@ -96,4 +119,9 @@ define XILINX_PREBUILT_INSTALL_IMAGES_CMDS
 	$(XILINX_PREBUILT_INSTALL_ZYNQMP_PMUFW)
 endef
 
+define XILINX_PREBUILT_INSTALL_TARGET_CMDS
+	$(XILINX_PREBUILT_INSTALL_VERSAL_PLD_PDI)
+	$(XILINX_PREBUILT_INSTALL_VERSAL_XSA_PLD_PDI)
+endef
+
 $(eval $(generic-package))