mb/google/brox/var/lotso: Add RAM ID for K3KL8L80CM-MGCT

Add RAM ID for K3KL8L80CM-MGCT. And importing a single RAM device,
so use mb_get_channel_disable_mask to distinguish it.

BUG=b/468889066
BRANCH=None
TEST=boot to kernel success, and the log shows that the RAM ID is correct.

Change-Id: Idc1e890ab826ec008031f54e0fc445fa5ee62978
Signed-off-by: Rui Zhou <zhourui@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90752
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>

src/mainboard/google/brox/Kconfig

@@ -81,6 +81,7 @@ config BOARD_GOOGLE_BROX_EC_ISH
 config BOARD_GOOGLE_LOTSO
 	select BOARD_GOOGLE_BASEBOARD_BROX
 	select CHROMEOS_WIFI_SAR if CHROMEOS
+	select ENFORCE_MEM_CHANNEL_DISABLE
 	select MAINBOARD_HAS_GOOGLE_STRAUSS_KEYBOARD
 	select USE_UNIFIED_AP_FIRMWARE_FOR_UFS_AND_NON_UFS
 

src/mainboard/google/brox/variants/lotso/memory.c

@@ -99,6 +99,19 @@ bool variant_is_half_populated(void)
 	return gpio_get(GPP_S0);
 }
 
+uint8_t mb_get_channel_disable_mask(void)
+{
+	/*
+	 * GPP_S0 High -> One RAM Chip
+	 * GPP_S0 Low  -> Two RAM Chip
+	 * Disable all other channels except first two on each controller
+	 */
+	if (gpio_get(GPP_S0))
+		return (BIT(2) | BIT(3));
+
+	return 0;
+}
+
 void variant_get_spd_info(struct mem_spd *spd_info)
 {
 	spd_info->topo = MEM_TOPO_MEMORY_DOWN;

src/mainboard/google/brox/variants/lotso/memory/Makefile.mk

@@ -7,4 +7,4 @@ SPD_SOURCES =
 SPD_SOURCES += spd/lp5/set-0/spd-9.hex      # ID = 0(0b0000)  Parts = K3KL6L60GM-MGCT
 SPD_SOURCES += spd/lp5/set-0/spd-1.hex      # ID = 1(0b0001)  Parts = H9JCNNNBK3MLYR-N6E
 SPD_SOURCES += spd/lp5/set-0/spd-11.hex      # ID = 2(0b0010)  Parts = K3KL8L80DM-MGCU, MT62F1G32D2DS-023 WT:C, H58G56BK8BX068, H58G56CK8BX146, K3KL8L80EM-MGCU
-SPD_SOURCES += spd/lp5/set-0/spd-7.hex      # ID = 3(0b0011)  Parts = H58G56BK7BX068
+SPD_SOURCES += spd/lp5/set-0/spd-7.hex      # ID = 3(0b0011)  Parts = H58G56BK7BX068, K3KL8L80CM-MGCT

src/mainboard/google/brox/variants/lotso/memory/dram_id.generated.txt

@@ -9,6 +9,7 @@ H9JCNNNBK3MLYR-N6E             1 (0001)
 K3KL8L80DM-MGCU                2 (0010)
 MT62F1G32D2DS-023 WT:C         2 (0010)
 H58G56BK8BX068                 2 (0010)
-H58G56BK7BX068                 3 (0011)
 H58G56CK8BX146                 2 (0010)
 K3KL8L80EM-MGCU                2 (0010)
+H58G56BK7BX068                 3 (0011)
+K3KL8L80CM-MGCT                3 (0011)

src/mainboard/google/brox/variants/lotso/memory/mem_parts_used.txt

@@ -10,10 +10,11 @@
 
 # Part Name
 K3KL6L60GM-MGCT
+K3KL8L80CM-MGCT
 H9JCNNNBK3MLYR-N6E
 K3KL8L80DM-MGCU
 MT62F1G32D2DS-023 WT:C
 H58G56BK8BX068
-H58G56BK7BX068
 H58G56CK8BX146
 K3KL8L80EM-MGCU
+H58G56BK7BX068