Hung-Te Lin submitted this change.

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vc/mediatek/mt8195: Optimize DRAM init time by reducing I2C I/O

Disable reading of vdram/vddq/vmddr to reduce access of I2C
to reduce DRAM init time by about 30ms.
The values were only needed by HQA report and not needed on
production units.

BUG=b:195274787

Signed-off-by: Ryan Chuang <ryan.chuang@mediatek.corp-partner.google.com>
Change-Id: I32cd68fb8b52cec6e145d6772475fde0130ca6ac
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56850
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.corp-partner.google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
M src/vendorcode/mediatek/mt8195/dramc/dramc_pi_main.c
1 file changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/vendorcode/mediatek/mt8195/dramc/dramc_pi_main.c b/src/vendorcode/mediatek/mt8195/dramc/dramc_pi_main.c
index b5b9ae1..f39023b 100644
--- a/src/vendorcode/mediatek/mt8195/dramc/dramc_pi_main.c
+++ b/src/vendorcode/mediatek/mt8195/dramc/dramc_pi_main.c
@@ -273,10 +273,12 @@
 #ifndef DDR_INIT_TIME_PROFILING
     print("Read voltage for %d, %d\n", p->frequency, vGet_Current_SRAMIdx(p));
     print("Vcore = %d\n", dramc_get_vcore_voltage());
+#ifdef FOR_HQA_REPORT_USED
     print("Vdram = %d\n", dramc_get_vmdd_voltage(p->dram_type));
     print("Vddq = %d\n", dramc_get_vmddq_voltage(p->dram_type));
     print("Vmddr = %d\n", dramc_get_vmddr_voltage());
 #endif
+#endif
 
 #endif
 #endif

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