feat(nxp-ddr): add workaround for errata A050958

Set the receiver gain to max value to recover
cold temp marginality issue for phy-gen2

Signed-off-by: Pankit Garg <pankit.garg@nxp.com>
Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Change-Id: If639fa3ed404cf6e1b8abcc2b7137db1fdd0b2c2

drivers/nxp/ddr/nxp-ddr/ddr.mk

@@ -1,5 +1,5 @@
 #
-# Copyright 2021 NXP
+# Copyright 2021-2022 NXP
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -19,6 +19,10 @@ ifeq (${ERRATA_DDR_A050450}, 1)
 $(eval $(call add_define,ERRATA_DDR_A050450))
 endif
 
+ifeq (${ERRATA_DDR_A050958}, 1)
+$(eval $(call add_define,ERRATA_DDR_A050958))
+endif
+
 endif
 
 ifeq ($(PLAT_DDR_PHY), PHY_GEN1)

drivers/nxp/ddr/phy-gen2/phy.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021 NXP
+ * Copyright 2021-2022 NXP
  * SPDX-License-Identifier: BSD-3-Clause
  *
  */
@@ -1673,6 +1673,10 @@ static void prog_dq_dqs_rcv_cntrl(uint16_t *phy,
 	int sel_analog_vref = 1;
 	uint32_t addr;
 
+#ifdef ERRATA_DDR_A050958
+	gain_curr_adj_defval = 0x1f;
+#endif
+
 	dq_dqs_rcv_cntrl = gain_curr_adj_defval << csr_gain_curr_adj_lsb |
 			major_mode_dbyte << csr_major_mode_dbyte_lsb	|
 			dfe_ctrl_defval << csr_dfe_ctrl_lsb		|

plat/nxp/common/soc_errata/errata.c

@@ -38,4 +38,7 @@ void soc_errata(void)
 #if ERRATA_DDR_A050450
 	INFO("SoC workaround for DDR Errata A050450 was applied\n");
 #endif
+#if ERRATA_DDR_A050958
+	INFO("SoC workaround for DDR Errata A050958 was applied\n");
+#endif
 }