From: Emanuele Ghidoli emanuele.ghidoli@toradex.com
Add support to Verdin IMX8MP V1.1B SKU which uses MT53E1G32D2FW-046 WT:B memory. Compared to the 8 GB memory (MT53E2G32D4NQ-046 WT:A) used on Verdin IMX8MP V1.0A it has 16 row addresses instead of 17. In fact, the new memory, is a 2 GB/rank memory. The 8 GB memory is a 4 GB/rank memory.
Manually tweaking Host Interface addresses vs LPDDR4 signals mapping it is possible to have a single configuration working with both memories: - Old configuration: HIF bit 30 -> rank, HIF bit 29 -> Row 16 - New configuration: HIF bit 29 -> rank, HIF bit 30 -> Row 16
With this change the memory space from the host processor is contiguous for both the configurations and the correct memory size is computed using get_ram_size() at runtime.
Support for single rank memories still works thanks to the fact dual ranks training fails (ddr_init->ddr_cfg_phy) toward single rank memories.
Signed-off-by: Emanuele Ghidoli emanuele.ghidoli@toradex.com Signed-off-by: Marcel Ziswiler marcel.ziswiler@toradex.com ---
(no changes since v1)
board/toradex/verdin-imx8mp/lpddr4_timing.c | 4 ++-- board/toradex/verdin-imx8mp/spl.c | 5 ++--- 2 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/board/toradex/verdin-imx8mp/lpddr4_timing.c b/board/toradex/verdin-imx8mp/lpddr4_timing.c index 3e00d9b51e1..314b74e7df2 100644 --- a/board/toradex/verdin-imx8mp/lpddr4_timing.c +++ b/board/toradex/verdin-imx8mp/lpddr4_timing.c @@ -55,13 +55,13 @@ struct dram_cfg_param ddr_ddrc_cfg[] = { { 0x3d4001c4, 0x1 }, { 0x3d4000f4, 0xc99 }, { 0x3d400108, 0x9121c1c }, - { 0x3d400200, 0x18 }, + { 0x3d400200, 0x17 }, { 0x3d40020c, 0x0 }, { 0x3d400210, 0x1f1f }, { 0x3d400204, 0x80808 }, { 0x3d400214, 0x7070707 }, { 0x3d400218, 0x7070707 }, - { 0x3d40021c, 0xf07 }, + { 0x3d40021c, 0xf08 }, { 0x3d400250, 0x1705 }, { 0x3d400254, 0x2c }, { 0x3d40025c, 0x4000030 }, diff --git a/board/toradex/verdin-imx8mp/spl.c b/board/toradex/verdin-imx8mp/spl.c index ea99e370850..7b383cc0d53 100644 --- a/board/toradex/verdin-imx8mp/spl.c +++ b/board/toradex/verdin-imx8mp/spl.c @@ -34,11 +34,10 @@ int spl_board_boot_device(enum boot_device boot_dev_spl) void spl_dram_init(void) { /* - * try configuring for quad die, dual rank aka 8 GB falling back to - * dual die, single rank aka 1 GB (untested), 2 GB or 4 GB if it fails + * Try configuring for dual rank memory falling back to single rank */ if (ddr_init(&dram_timing)) { - printf("Quad die, dual rank failed, attempting dual die, single rank configuration.\n"); + printf("Dual rank failed, attempting single rank configuration.\n"); ddr_init(&dram_timing2); } }