[PATCH 4/5] arm: socfpga: agilex5: drop dual port hack

[Michael Tretter <m.tretter@pengutronix.de>]

On Agilex 5 with a firmware generated by Quartus 25.3, the dualport
value in the handoff_table is correctly set to 0. In this case, the
workaround is not necessary.

If the Agilex 5 is configured with dual port DDR access, the hack is not
correct either, because while the firmware is configured for dual port,
barebox would incorrectly initialize the IOSSM controller.

Remove the hack.

If the dualport issues become apparent, either use this as a test case
to fix dualport support correctly or implement a proper workaround with
documentation and warning.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
---
 arch/arm/mach-socfpga/agilex5-sdram.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/arch/arm/mach-socfpga/agilex5-sdram.c b/arch/arm/mach-socfpga/agilex5-sdram.c
index 7a82dc6a6ad4..fa940958d104 100644
--- a/arch/arm/mach-socfpga/agilex5-sdram.c
+++ b/arch/arm/mach-socfpga/agilex5-sdram.c
@@ -94,14 +94,8 @@ static int populate_ddr_handoff(struct altera_sdram_plat *plat, struct io96b_inf
 	/* Read handoff for DDR configuration */
 	socfpga_handoff_read((void *)SOC64_HANDOFF_SDRAM, handoff_table, len);
 
-	/* Read handoff - dual port
-	   FIXME: Intel u-boot has a patch that HACKs this to 0
-	   https://github.com/altera-opensource/meta-intel-fpga-refdes/ \
-	   blob/master/recipes-bsp/u-boot/files/v1-0001-HSD-15015933655-ddr-altera-agilex5-Hack-dual-port-DO-NOT-MERGE.patch
-	   Patch doesn't say why or what is broken here: handoff files? dualport RAM access?
-	 */
-	//plat->dualport = FIELD_GET(BIT(0), handoff_table[PORT_EMIF_CONFIG_OFFSET]);
-	plat->dualport = 0;
+	/* Read handoff - dual port */
+	plat->dualport = FIELD_GET(BIT(0), handoff_table[PORT_EMIF_CONFIG_OFFSET]);
 	pr_debug("%s: dualport from handoff: 0x%x\n", __func__, plat->dualport);
 
 	if (plat->dualport)

-- 
2.47.3