From: zhexzhan <zhexi.zhang@xxxxxxx>
Issue: DROOP coef read by HDT appear to be mismatch with requirement of BKM0.83
Root cause: These values are supposed to be overwritten by PPLIB.
However, driver missed code of this part.
Solution: Add overwriting process when reading pptable from vBIOS
Hardcode specific coef with correct values:
GbVdroopTableCksoffA0 = 0xFFFCD2E7
GbVdroopTableCksoffA1 = 0x24902
GbVdroopTableCksoffA2 = 0x249BA
Signed-off-by: zhexzhan <zhexi.zhang@xxxxxxx>
---
drivers/gpu/drm/amd/powerplay/hwmgr/ppatomfwctrl.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/ppatomfwctrl.c b/drivers/gpu/drm/amd/powerplay/hwmgr/ppatomfwctrl.c
index 615cf2c0..b827c2c 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/ppatomfwctrl.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/ppatomfwctrl.c
@@ -293,6 +293,13 @@ int pp_atomfwctrl_get_avfs_information(struct pp_hwmgr *hwmgr,
format_revision = ((struct atom_common_table_header *)profile)->format_revision;
content_revision = ((struct atom_common_table_header *)profile)->content_revision;
+ if (format_revision == 4)
+ {
+ profile->gb_vdroop_table_cksoff_a0 = 0xfffcd2e7;
+ profile->gb_vdroop_table_cksoff_a1 = 0x24902;
+ profile->gb_vdroop_table_cksoff_a2 = 0x249ba;
+ }
+
if (format_revision == 4 && content_revision == 1) {
param->ulMaxVddc = le32_to_cpu(profile->maxvddc);
param->ulMinVddc = le32_to_cpu(profile->minvddc);
--
2.7.4
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