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authorMaxim Polyakov <max.senia.poliak@gmail.com>2019-08-29 16:51:37 +0300
committerPatrick Georgi <pgeorgi@google.com>2019-10-04 16:21:43 +0000
commitb4383fc759a0f705d052efc696623bf3b9a917c8 (patch)
tree85f6d784aa25a16c0c2bd49b979697f3d8e0db59 /src
parent33ed3ebf6a1c2e2fdac4ac798ad7ce8290cbe45a (diff)
downloadcoreboot-b4383fc759a0f705d052efc696623bf3b9a917c8.tar.xz
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>
Diffstat (limited to 'src')
-rw-r--r--src/soc/intel/skylake/vr_config.c22
1 files changed, 13 insertions, 9 deletions
diff --git a/src/soc/intel/skylake/vr_config.c b/src/soc/intel/skylake/vr_config.c
index 089dd5d572..fc48558f2e 100644
--- a/src/soc/intel/skylake/vr_config.c
+++ b/src/soc/intel/skylake/vr_config.c
@@ -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];
}