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authorTim Wawrzynczak <twawrzynczak@chromium.org>2022-05-27 12:34:02 -0600
committerMartin L Roth <gaumless@tutanota.com>2022-05-29 14:44:20 +0000
commit5027d2de4d63359967b02ba1aecc04b8f34b1d69 (patch)
tree8930fcc73da86c8de60ac4cd947516229e2b0085 /src/superio/ite/it8623e
parentfc32b8fea3f58e41e4db869444b26ac12dcd6606 (diff)
mb/google/brya/var/agah: Fix GPU power sequencing
While testing the power sequencing code for the GPU, a few mistakes were found. This patch fixes those errors: 1) FBVDD load-switch enable is active-low 2) NVVDD VR enable is active-high 3) GPU_PERST_L should be driven low during GPIO table programming 4) The BAR saving code missed the top 32 bits of 64-bit BARs 5) sequence_rail() assumed the pwr_en_gpio and pg_gpio were the same polarity 6) PEG vGPIOs were not programmed to the correct NF BUG=b:233552225 TEST=dGPU is able to successfully enumerate over PCIe bus Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org> Change-Id: I85767d382012a0c7dfdb1f849768e0160f06c273 Reviewed-on: https://review.coreboot.org/c/coreboot/+/64727 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
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