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soc/intel/alderlake: Align RcompResistor definition as per MRC 

List of changes:
1. Alder Lake MRC is expecting a RcompResistor value of word width.
Reference RCOMP resistors on motherboard are ~ 100 Ohms but coreboot
is passing an array of RcompResistor which is not completely in use.

Note: Rcomp resistor value represents rcomp resistor attached to
the DDR_COMP pins on the SoC.

2. Also, remove usage of '&' with memcpy the required value into
RcompTarget array.

3. Also, update RcompResistor value for ADLRVP.

BUG=b:183341229
TEST=Enable FSP debug log to verify the override value for
RcompResistor is reflecting correctly.

Change-Id: I69c7cec55b65036fc039c33374a3fd363ef7004e
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51704
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Subrata Banik 2021-03-22 15:50:08 +05:30
parent 74406e1053
commit c8ac8f5ce9
3 changed files with 9 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/mainboard/intel/adlrvp/memory.c
View File

@ -14,8 +14,8 @@ static const struct mb_cfg ddr4_mem_config = {
.ddr_config = {
/* Baseboard uses only 100ohm Rcomp resistors */
.rcomp_resistor = {100, 100, 100},
/* Baseboard uses only 100ohm Rcomp resistor */
.rcomp_resistor = 100,
/* Baseboard Rcomp target values */
.rcomp_targets = {40, 30, 33, 33, 30},
@ -148,8 +148,8 @@ static const struct mb_cfg ddr5_mem_config = {
.UserBd = BOARD_TYPE_MOBILE,
.ddr_config = {
/* Baseboard uses only 100ohm Rcomp resistors */
.rcomp_resistor = {100, 100, 100},
/* Baseboard uses only 100ohm Rcomp resistor */
.rcomp_resistor = 100,
/* Baseboard Rcomp target values */
.rcomp_targets = {50, 30, 30, 30, 27},

7
src/soc/intel/alderlake/include/soc/meminit.h
View File

@ -20,11 +20,10 @@ struct mem_ddr_config {
/* Dqs Pins Interleaved Setting. Enable/Disable Control */
bool dq_pins_interleaved;
/*
* Rcomp resistor values. These values represent the resistance in
* ohms of the three rcomp resistors attached to the DDR_COMP_0,
* DDR_COMP_1, and DDR_COMP_2 pins on the DRAM.
* Rcomp resistor value. This values represents the resistance in
* ohms of the rcomp resistor attached to the DDR_COMP pin on the SoC.
*/
uint16_t rcomp_resistor[3];
uint16_t rcomp_resistor;
/* Rcomp target values. */
uint16_t rcomp_targets[5];
};

5
src/soc/intel/alderlake/meminit.c
View File

@ -28,9 +28,8 @@ static void meminit_lp5x(FSP_M_CONFIG *mem_cfg, const struct mem_lp5x_config *lp
static void meminit_ddr(FSP_M_CONFIG *mem_cfg, const struct mem_ddr_config *ddr_config)
{
mem_cfg->DqPinsInterleaved = ddr_config->dq_pins_interleaved;
memcpy(&mem_cfg->RcompResistor, ddr_config->rcomp_resistor,
sizeof(mem_cfg->RcompResistor));
memcpy(&mem_cfg->RcompTarget, ddr_config->rcomp_targets, sizeof(mem_cfg->RcompTarget));
mem_cfg->RcompResistor = ddr_config->rcomp_resistor;
memcpy(mem_cfg->RcompTarget, ddr_config->rcomp_targets, sizeof(mem_cfg->RcompTarget));
}
static const struct soc_mem_cfg soc_mem_cfg[] = {