On 01/09/25 09:03, Aaron Kling via B4 Relay wrote:

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This series borrows the concept used on Tegra234 to scale EMC based on
CPU frequency and applies it to Tegra186 and Tegra194. Except that the
bpmp on those archs does not support bandwidth manager, so the scaling
iteself is handled similar to how Tegra124 currently works.

Signed-off-by: Aaron Kling <redacted>
---

Tegra186/194 had multiple drivers for BWMGR, ISOMGR and LA+PTSA configs
on the CPU side. I am not sure how effective this patch series will be 
in absence
of those components. In Tegra234, those were moved to BPMP-FW. So, Kernel
forwards the BW request to BPMP (R5) who takes care of setting the final 
freq.

Thank you,
Sumit Gupta

Aaron Kling (8):
       dt-bindings: tegra: Add ICC IDs for dummy memory clients for Tegra186
       dt-bindings: tegra: Add ICC IDs for dummy memory clients for Tegra194
       cpufreq: tegra186: add OPP support and set bandwidth
       memory: tegra186-emc: Support non-bpmp icc scaling
       memory: tegra186: Support icc scaling
       memory: tegra194: Support icc scaling
       arm64: tegra: Add CPU OPP tables for Tegra186
       arm64: tegra: Add CPU OPP tables for Tegra194

  arch/arm64/boot/dts/nvidia/tegra186.dtsi | 317 +++++++++++++++
  arch/arm64/boot/dts/nvidia/tegra194.dtsi | 636 +++++++++++++++++++++++++++++++
  drivers/cpufreq/tegra186-cpufreq.c       | 152 +++++++-
  drivers/memory/tegra/tegra186-emc.c      | 132 ++++++-
  drivers/memory/tegra/tegra186.c          |  48 +++
  drivers/memory/tegra/tegra194.c          |  59 ++-
  include/dt-bindings/memory/tegra186-mc.h |   4 +
  include/dt-bindings/memory/tegra194-mc.h |   6 +
  8 files changed, 1344 insertions(+), 10 deletions(-)
---
base-commit: 1b237f190eb3d36f52dffe07a40b5eb210280e00
change-id: 20250823-tegra186-icc-7299110cd774
prerequisite-change-id: 20250826-tegra186-cpufreq-fixes-7fbff81c68a2:v3
prerequisite-patch-id: 74a2633b412b641f9808306cff9b0a697851d6c8
prerequisite-patch-id: 9c52827317f7abfb93885febb1894b40967bd64c

Best regards,
--
Aaron Kling [off-list ref]