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mb/system76/lemp9: Drop unneeded memcfg values and comments 

This mainboard uses a Comet Lake SoC and mixed-topology DDR4 memory.
Drop LPDDR-specific DQ and DQS mappings and comment about Cannon Lake.

Change-Id: Icb986d1c074e64b3cfad3897b69d35d108f64bff
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51336
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Crawford <tcrawford@system76.com>
Reviewed-by: Jeremy Soller <jeremy@system76.com>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
This commit is contained in:
Angel Pons 2021-03-08 10:14:47 +01:00 committed by Michael Niewöhner
parent 813a3bafa8
commit a70d17dba2
1 changed files with 1 additions and 34 deletions
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35
src/mainboard/system76/lemp9/romstage.c
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@ -16,36 +16,6 @@ static const struct cnl_mb_cfg memcfg = {
},
.spd[3] = {.read_type = NOT_EXISTING},
/*
* For each channel, there are 3 sets of DQ byte mappings,
* where each set has a package 0 and a package 1 value (package 0
* represents the first 64-bit lpddr4 chip combination, and package 1
* represents the second 64-bit lpddr4 chip combination).
* The first three sets are for CLK, CMD, and CTL.
* The fsp package actually expects 6 sets, but the last 3 sets are
* not used in CNL, so we only define the three sets that are used
* and let the meminit_lpddr4() routine take care of clearing the
* unused fields for the caller.
*/
.dq_map[DDR_CH0] = {
{0x0F, 0xF0}, {0x00, 0xF0}, {0x0F, 0xF0},
//{0x0F, 0x00}, {0xFF, 0x00}, {0xFF, 0x00}
},
.dq_map[DDR_CH1] = {
{0x33, 0xCC}, {0x00, 0xCC}, {0x33, 0xCC},
//{0x33, 0x00}, {0xFF, 0x00}, {0xFF, 0x00}
},
/*
* DQS CPU<>DRAM map Ch0 and Ch1. Each array entry represents a
* mapping of a dq bit on the CPU to the bit it's connected to on
* the memory part. The array index represents the dqs bit number
* on the memory part, and the values in the array represent which
* pin on the CPU that DRAM pin connects to.
*/
.dqs_map[DDR_CH0] = {0, 1, 2, 3, 4, 5, 6, 7},
.dqs_map[DDR_CH1] = {1, 0, 2, 3, 4, 5, 6, 7},
/*
* Rcomp resistor values. These values represent the resistance in
* ohms of the three rcomp resistors attached to the DDR_COMP_0,
@ -53,10 +23,7 @@ static const struct cnl_mb_cfg memcfg = {
*/
.rcomp_resistor = { 121, 81, 100 },
/*
* Rcomp target values. These will typically be the following
* values for Cannon Lake : { 80, 40, 40, 40, 30 }
*/
/* Rcomp target values */
.rcomp_targets = { 100, 40, 20, 20, 26 },
/*