GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

soc/skl/vr_config: set Iccmax_gt depends on CPU/GT 

According to the DC Current Specifications [1], the current limit for
the graphical VR domain (Iccmax_gt) isn't same for different Kaby Lake S
CPUs. This value should depend on the iGPU model and processor TDP:

  +---------------------+-----+------------+
  |       Segment       | TDP | Icc_max GT |
  +---------------------+-----+------------+
  | Dual Core GT2/GT1   | 35W |            |
  | Dual Core GT2       | 51W |    48 A    |
  | Dual Core GT1       | 54W |            |
  +---------------------+-----+------------+
  | Quad Core GT2       | 35W |    35 A    |
  +---------------------+-----+------------+
  | Quad Core GT2       | 65W |    45 A    |
  | Quad Core GT2 K-SKU | 91W |            |
  +---------------------+-----+------------+

This patch adds the remaining Iccmax_gt current limit values from the
documentation [1].

[1] 7th Generation Intel(R) Processor Families for S Platforms and
    Intel(R) Core(TM) X-Series Processor Family Datasheet, Volume 1,
    December 2018, Document Number: 335195-003

Change-Id: I19766e4f8fab6b48565b65ed4cf13efbc213e654
Signed-off-by: Maxim Polyakov <max.senia.poliak@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35166
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
This commit is contained in:
Maxim Polyakov 2019-08-29 16:51:37 +03:00 committed by Patrick Georgi
parent 33ed3ebf6a
commit b4383fc759
1 changed files with 13 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
src/soc/intel/skylake/vr_config.c
View File

@ -117,12 +117,12 @@ static uint16_t get_sku_icc_max(int domain)
* +----------------+-------------+---------------+------+-----+
* | Domain/Setting | SA | IA | GTUS | GTS |
* +----------------+-------------+---------------+------+-----+
* | IccMax(KBL-S) | 11.1A | 100A | 45A | 45A |
* | | | ... | | |
* | | | 40A | | |
* | IccMax(KBL-S) | 11.1A | 100A | 48A | 48A |
* | | | ... | 45A | 45A |
* | | | 40A | 35A | 35A |
* +----------------+-------------+---------------+------+-----+
* | IccMax(KBL-H) | 11.1A(45W) | 68A | 55A | 55A |
* | | 6.6A(Others)| 60A | | |
* | IccMax(KBL-H) | 11.1A (45W) | 68A | 55A | 55A |
* | | 6.6A (18W) | 60A | | |
* +----------------+-------------+---------------+------+-----+
* | IccMax(KBL-U/R)| 6A(U42) | 64A(U42) | 31A | 31A |
* | | 4.5A(Others)| 29A(P/C) | | |
@ -139,8 +139,8 @@ static uint16_t get_sku_icc_max(int domain)
uint16_t icc_max[NUM_VR_DOMAINS] = {
VR_CFG_AMP(11.1),
VR_CFG_AMP(40),
VR_CFG_AMP(45),
VR_CFG_AMP(45),
VR_CFG_AMP(48),
VR_CFG_AMP(48),
};
if (tdp >= 54)
icc_max[VR_IA_CORE] = VR_CFG_AMP(58);
@ -155,13 +155,17 @@ static uint16_t get_sku_icc_max(int domain)
uint16_t icc_max[NUM_VR_DOMAINS] = {
VR_CFG_AMP(11.1),
VR_CFG_AMP(66),
VR_CFG_AMP(55),
VR_CFG_AMP(55),
VR_CFG_AMP(45),
VR_CFG_AMP(45),
};
if (tdp >= 91)
icc_max[VR_IA_CORE] = VR_CFG_AMP(100);
else if (tdp >= 65)
icc_max[VR_IA_CORE] = VR_CFG_AMP(79);
else if (tdp >= 35) {
icc_max[VR_GT_UNSLICED] = VR_CFG_AMP(35);
icc_max[VR_GT_SLICED] = VR_CFG_AMP(35);
}
return icc_max[domain];
}