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* [PATCH v4 00/11] Add explicit clock vote and enable power-domain for QCOM-ICE
@ 2026-03-23  9:17 Harshal Dev
  2026-03-23  9:17 ` [PATCH v4 01/11] dt-bindings: crypto: qcom,ice: Fix missing power-domain and iface clk Harshal Dev
                   ` (10 more replies)
  0 siblings, 11 replies; 30+ messages in thread
From: Harshal Dev @ 2026-03-23  9:17 UTC (permalink / raw)
  To: Herbert Xu, David S. Miller, Rob Herring, Krzysztof Kozlowski,
	Conor Dooley, Bjorn Andersson, Konrad Dybcio, Abel Vesa,
	Manivannan Sadhasivam, cros-qcom-dts-watchers, Eric Biggers,
	Dmitry Baryshkov, Jingyi Wang, Tengfei Fan, Bartosz Golaszewski,
	David Wronek, Luca Weiss, Neil Armstrong, Melody Olvera,
	Alexander Koskovich
  Cc: Brian Masney, Neeraj Soni, Gaurav Kashyap, linux-arm-msm,
	linux-crypto, devicetree, linux-kernel, Krzysztof Kozlowski,
	Konrad Dybcio, Kuldeep Singh, Krzysztof Kozlowski, Harshal Dev

When the kernel is booted without the 'clk_ignore_unused' and
'pd_ignore_unused' command‑line flags, votes for unused clocks and power
domains are dropped by the kernel post late_init and deferred probe
timeout. Depending on the relative timing between the ICE probe and the
kernel disabling the unused clocks and power domains occasional unclocked
register accesses or 'stuck' clocks are observed during QCOM‑ICE probe.
When the 'iface' clock is not voted on, unclocked register access would
be observed. On the other hand, if the associated power-domain for ICE
is not enabled, a 'stuck' clock is observed.

This patch series resolves both of these problems by adding explicit
power‑domain enablement and 'iface' clock‑vote handling to the QCOM‑ICE
driver.

The clock 'stuck' issue was first reported on Qualcomm RideSX4 (sa8775p)
platform: https://lore.kernel.org/all/ZZYTYsaNUuWQg3tR@x1/

Issue with unclocked ICE register access is easily reproducible on
on Qualcomm RB3Gen2 (kodiak) platform when 'clk_ignore_unused' is
not passed on the kernel command-line.

This patch series has been validated on: SM8650-MTP, RB3Gen2 and
Lemans-EVK.

Signed-off-by: Harshal Dev <harshal.dev@oss.qualcomm.com>
---
Changes in v4:
- Squashed commits 1 and 2 from v3 to form a single consolidated patch with
  an updated and more concise commit message that explains why the DT binding
  needs to be fixed and why the fix is necessary for this release cycle.
- Re-order the ICE driver source code patches to be positioned before the DTS
  patches.
- Collected Reviewed-by tags from Konrad for DTS patches which were missed in
  v3.
- Link to v3: https://lore.kernel.org/r/20260317-qcom_ice_power_and_clk_vote-v3-0-53371dbabd6a@oss.qualcomm.com

Changes in v3:
- Dropped "_clk" suffix from clock names in DT binding and sources and ensure
  ICE driver looks for these updated clock names.
- Updated commit message of DT binding change (Patch 1) to explicitly state
  that the change is preserving backward compatibility.
- Introduced new DT binding commit to ensure eliza and milos require the iface
  clock and power-domain.
- Check for IS_ERR() on devm_clk_get_optional_enabled(dev, "iface") return
  value.
- Minor beautification of dev_err() prints as suggested by Konrad.
- Rebased onto latest linux-next tag next-20260316.
- Link to v2: https://lore.kernel.org/r/20260310-qcom_ice_power_and_clk_vote-v2-0-b9c2a5471d9e@oss.qualcomm.com

Changes in v2:
- Updated the DT bindings and ICE driver source to ensure no ABI breaks are
  made in this patch series. A follow-up patch series will mark the clocks
  and power-domain as required to preserve bisectability.
- Added list of allowed clock-names to the DT-binding.
- Added Fixes tag to mark the original regressions and ensure back-porting
  for stable trees.
- Updated the commit messages to explicitly mention the problem of
  potential unclocked register access and stuck clocks during probe.
- Dropped explicit calls to pm_runtime_* APIs from ICE probe, suspend and
  resume.
- Link to v1: https://lore.kernel.org/r/20260123-qcom_ice_power_and_clk_vote-v1-0-e9059776f85c@qti.qualcomm.com

---
Harshal Dev (11):
      dt-bindings: crypto: qcom,ice: Fix missing power-domain and iface clk
      soc: qcom: ice: Allow explicit votes on 'iface' clock for ICE
      arm64: dts: qcom: kaanapali: Add power-domain and iface clk for ice node
      arm64: dts: qcom: lemans: Add power-domain and iface clk for ice node
      arm64: dts: qcom: monaco: Add power-domain and iface clk for ice node
      arm64: dts: qcom: sc7180: Add power-domain and iface clk for ice node
      arm64: dts: qcom: kodiak: Add power-domain and iface clk for ice node
      arm64: dts: qcom: sm8450: Add power-domain and iface clk for ice node
      arm64: dts: qcom: sm8550: Add power-domain and iface clk for ice node
      arm64: dts: qcom: sm8650: Add power-domain and iface clk for ice node
      arm64: dts: qcom: sm8750: Add power-domain and iface clk for ice node

 .../bindings/crypto/qcom,inline-crypto-engine.yaml | 35 +++++++++++++++++++++-
 arch/arm64/boot/dts/qcom/kaanapali.dtsi            |  6 +++-
 arch/arm64/boot/dts/qcom/kodiak.dtsi               |  6 +++-
 arch/arm64/boot/dts/qcom/lemans.dtsi               |  6 +++-
 arch/arm64/boot/dts/qcom/monaco.dtsi               |  6 +++-
 arch/arm64/boot/dts/qcom/sc7180.dtsi               |  6 +++-
 arch/arm64/boot/dts/qcom/sm8450.dtsi               |  6 +++-
 arch/arm64/boot/dts/qcom/sm8550.dtsi               |  6 +++-
 arch/arm64/boot/dts/qcom/sm8650.dtsi               |  6 +++-
 arch/arm64/boot/dts/qcom/sm8750.dtsi               |  6 +++-
 drivers/soc/qcom/ice.c                             | 17 +++++++++--
 11 files changed, 94 insertions(+), 12 deletions(-)
---
base-commit: 95c541ddfb0815a0ea8477af778bb13bb075079a
change-id: 20260120-qcom_ice_power_and_clk_vote-769704f5036a

Best regards,
-- 
Harshal Dev <harshal.dev@oss.qualcomm.com>


^ permalink raw reply	[flat|nested] 30+ messages in thread

end of thread, other threads:[~2026-04-06  9:45 UTC | newest]

Thread overview: 30+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-03-23  9:17 [PATCH v4 00/11] Add explicit clock vote and enable power-domain for QCOM-ICE Harshal Dev
2026-03-23  9:17 ` [PATCH v4 01/11] dt-bindings: crypto: qcom,ice: Fix missing power-domain and iface clk Harshal Dev
2026-03-24 10:46   ` Kuldeep Singh
2026-03-31  9:40     ` Harshal Dev
2026-04-06  8:25       ` Harshal Dev
2026-04-06  8:37   ` Krzysztof Kozlowski
2026-04-06  9:20     ` Harshal Dev
2026-04-06  9:45       ` Harshal Dev
2026-03-23  9:17 ` [PATCH v4 02/11] soc: qcom: ice: Allow explicit votes on 'iface' clock for ICE Harshal Dev
2026-03-23 12:27   ` Konrad Dybcio
2026-03-24  4:48   ` Kuldeep Singh
2026-03-24 16:29   ` Manivannan Sadhasivam
2026-03-23  9:17 ` [PATCH v4 03/11] arm64: dts: qcom: kaanapali: Add power-domain and iface clk for ice node Harshal Dev
2026-03-24  5:04   ` Kuldeep Singh
2026-03-23  9:17 ` [PATCH v4 04/11] arm64: dts: qcom: lemans: " Harshal Dev
2026-03-24 10:33   ` Kuldeep Singh
2026-03-23  9:17 ` [PATCH v4 05/11] arm64: dts: qcom: monaco: " Harshal Dev
2026-03-24 10:48   ` Kuldeep Singh
2026-03-23  9:17 ` [PATCH v4 06/11] arm64: dts: qcom: sc7180: " Harshal Dev
2026-03-24 10:48   ` Kuldeep Singh
2026-03-23  9:18 ` [PATCH v4 07/11] arm64: dts: qcom: kodiak: " Harshal Dev
2026-03-24 10:37   ` Kuldeep Singh
2026-03-23  9:18 ` [PATCH v4 08/11] arm64: dts: qcom: sm8450: " Harshal Dev
2026-03-24 10:38   ` Kuldeep Singh
2026-03-23  9:18 ` [PATCH v4 09/11] arm64: dts: qcom: sm8550: " Harshal Dev
2026-03-24 10:39   ` Kuldeep Singh
2026-03-23  9:18 ` [PATCH v4 10/11] arm64: dts: qcom: sm8650: " Harshal Dev
2026-03-24 10:39   ` Kuldeep Singh
2026-03-23  9:18 ` [PATCH v4 11/11] arm64: dts: qcom: sm8750: " Harshal Dev
2026-03-24 10:47   ` Kuldeep Singh

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