Re: [PATCH v11 0/9] Add support for Core Power Reduction v3, v4 and Hardened

[Konrad Dybcio]

On 27.06.2023 20:30, Konrad Dybcio wrote:
> Changes in v11:
> 
> CPR COMMON:
> - split the commonizing patch, make it actually do what it says on the
>   tin..
> - fix some overflow bugs
> 
> CPR3:
> - fix some overflow bugs
> - don't assume "lack of qcom,opp-?loop-vadj" means val=0"
> 
> CPR BINDINGS:
> - drop quotes in items
> - drop clock-names (there's just a single one)
> - rewrite the description a bit
> - fix up the example
> - drop bogus minItems
> - "acc-syscon" -> "qcom,acc"
> 
> DTS:
> - fix qfprom children so that the bits=<> doesn't overflow reg[size]
> - drop unrelated changes
> - place one reg entry per line
I managed to send the wrong revision. Will send a new one, with more
fixes soon.

Konrad
> 
> Link to v10: https://lore.kernel.org/r/20230217-topic-cpr3h-v10-0-67aed8fdfa61@xxxxxxxxxx
> 
> Changes in v10:
> - Skip "Let qcom,opp-fuse-level be a 2-long array" (Applied by Viresh)
> - Use b4 (it may be the first time you're receiving this if git send-email
>   omitted you before..)
> - +Cc Robert Marko (expressed interest in previous revisions)
> - Add "Document CPR3 open/closed loop volt adjustment"
> CPR:
> - %hhu -> %u (checkpatch)
> CPR BINDINGS:
> - Drop QCS404 fuse set (it doesn't use this driver, what did I even think..)
>   but leave the allOf:if: block for expansion (sdm660, msm8996, ipqABCD should
>   follow soon..)
> - Drop Rob's R-b (as things changed *again*, please take one more look to make
>   sure you're okay with this file, Rob..)
> 
> Link to v9:
> https://lore.kernel.org/linux-arm-msm/20230116093845.72621-1-konrad.dybcio@xxxxxxxxxx/
> 
> Changes in v9:
> - Restore forgotten MAINTAINERS patch (oops)
> CPR:
> - Include the missing header (big oops!)
> - Fix kconfig dependencies
> CPR bindings:
> - Fix cpu reg in example (why didn't dt_binding_check scream at that)
> - Add newlines between nodes in example
> - Change opp table node names to opp-table-cpu[04]
> - Change opp table labels to cpu[04]_opp_table
> - Change CPRh opp subnode names to opp-N from oppN
> - Remove some stray newlines
> - Bring back nvmem-cell-names and add the 8998's set
> - Allow power-domains for VDDCX_AO voting
> - Remove Rob's r-b, there's been quite a bit of changes..
> CPR DT:
> - Send the correct revision of the patch this time around..
> OPP bindings:
> - Add Rob's ack
> 
> Link to v8:
> https://lore.kernel.org/linux-arm-msm/20230110175605.1240188-1-konrad.dybcio@xxxxxxxxxx/
> 
> Changes in v8:
> - Overtake this series from AGdR
> - Apply all review comments from v7 except Vladimir's request to
>   not create the include/ header; it will be strictly necessary for
>   OSM-aware cpufreq_hw programming, which this series was more or
>   less created just for..
> - Drop QCS404 dtsi change, account for not breaking backwards compat
>   in [3/5]
> - Add type phandle type reference to acc-syscon in [1/5]
> - Update AGdR's email addresses for maintainer entries
> - Add [2/5] to make dt_binding_check happy
> - Separate the CPRh DT addition from cpufreq_hw addition, sort and
>   properly indent new nodes
> - Drop CPR yaml conversion, that happened in meantime
> - Reorder the patches to make a bit more sense
> - Tested again on MSM8998 Xperia XZ Premium (Maple)
> - I take no responsibility for AGdR's cheeky jokes, only the code!
> 
> Link to v7:
> https://lore.kernel.org/lkml/20210901155735.629282-1-angelogioacchino.delregno@xxxxxxxxxxxxxx/
> 
> Changes in v7:
> - Rebased on linux-next as of 210901
> - Changed cpr_read_efuse calls to nvmem_cell_read_variable_le_u32,
>   following what was done in commit c77634b9d916
> 
> Changes in v6:
> - Fixes from Bjorn's review
> - After a conversation with Viresh, it turned out I was abusing the
>   OPP API to pass the APM and MEM-ACC thresholds to qcom-cpufreq-hw,
>   so now the driver is using the genpd created virtual device and
>   passing drvdata instead to stop the abuse
> - Since the CPR commonization was ignored for more than 6 months,
>   it is now included in the CPRv3/4/h series, as there is no point
>   in commonizing without having this driver
> - Rebased on v5.13
> 
> Changes in v5:
> - Fixed getting OPP table when not yet installed by the caller
>   of power domain attachment
> 
> Changes in v4:
> - Huge patch series has been split for better reviewability,
>   as suggested by Bjorn
> 
> Changes in v3:
> - Fixed YAML doc issues
> - Removed unused variables and redundant if branch
> 
> Changes in v2:
> - Implemented dynamic Memory Accelerator corners support, needed
>   by MSM8998
> - Added MSM8998 Silver/Gold parameters
> 
> This commit introduces a new driver, based on the one for cpr v1,
> to enable support for the newer Qualcomm Core Power Reduction
> hardware, known downstream as CPR3, CPR4 and CPRh, and support
> for MSM8998 and SDM630 CPU power reduction.
> 
> In these new versions of the hardware, support for various new
> features was introduced, including voltage reduction for the GPU,
> security hardening and a new way of controlling CPU DVFS,
> consisting in internal communication between microcontrollers,
> specifically the CPR-Hardened and the Operating State Manager.
> 
> The CPR v3, v4 and CPRh are present in a broad range of SoCs,
> from the mid-range to the high end ones including, but not limited
> to, MSM8953/8996/8998, SDM630/636/660/845.
> 
> As to clarify, SDM845 does the CPR/SAW/OSM setup in TZ firmware, but
> this is limited to the CPU context; despite GPU CPR support being not
> implemented in this series, it is planned for the future, and some
> SDM845 need the CPR (in the context of GPU CPR) to be configured from
> this driver.
> 
> It is also planned to add the CPR data for MSM8996, since this driver
> does support the CPRv4 found on that SoC, but I currently have no time
> to properly test that on a real device, so I prefer getting this big
> implementation merged before adding more things on top.
> 
> As for MSM8953, we (read: nobody from SoMainline) have no device with
> this chip: since we are unable to test the cpr data and the entire
> driver on that one, we currently have no plans to do this addition
> in the future. This is left to other nice developers: I'm sure that
> somebody will come up with that, sooner or later
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
> ---
> AngeloGioacchino Del Regno (7):
>       MAINTAINERS: Add entry for Qualcomm CPRv3/v4/Hardened driver
>       dt-bindings: soc: qcom: cpr3: Add bindings for CPR3 driver
>       soc: qcom: cpr: Move common functions to new file
>       soc: qcom: cpr-common: Add support for flat fuse adjustment
>       soc: qcom: cpr-common: Add threads support
>       soc: qcom: Add support for Core Power Reduction v3, v4 and Hardened
>       arm64: dts: qcom: msm8998: Configure CPRh
> 
> Konrad Dybcio (2):
>       dt-bindings: opp: v2-qcom-level: Document CPR3 open/closed loop volt adjustment
>       soc: qcom: cpr: Use u64 for frequency
> 
>  .../devicetree/bindings/opp/opp-v2-qcom-level.yaml |   14 +
>  .../devicetree/bindings/soc/qcom/qcom,cpr3.yaml    |  289 ++
>  MAINTAINERS                                        |    6 +
>  arch/arm64/boot/dts/qcom/msm8998.dtsi              |  757 +++++
>  drivers/soc/qcom/Kconfig                           |   22 +
>  drivers/soc/qcom/Makefile                          |    2 +
>  drivers/soc/qcom/cpr-common.c                      |  362 +++
>  drivers/soc/qcom/cpr-common.h                      |  109 +
>  drivers/soc/qcom/cpr.c                             |  392 +--
>  drivers/soc/qcom/cpr3.c                            | 2932 ++++++++++++++++++++
>  include/soc/qcom/cpr.h                             |   17 +
>  11 files changed, 4535 insertions(+), 367 deletions(-)
> ---
> base-commit: 53cdf865f90ba922a854c65ed05b519f9d728424
> change-id: 20230217-topic-cpr3h-de232bfb47ec
> 
> Best regards,