Re: [PATCH v10 0/4] Misc SCM driver changes

[Mukesh Ojha <quic_mojha@quicinc.com>]

Bjorn,

Any comments on these patches?

-Mukesh

On 11/2/2023 10:44 PM, Mukesh Ojha wrote:
> First two changes changes are needed to enable download mode on
> chipset like IPQ9574 and IPQ5332 SoCs as for these targets others
> bits in download mode registers are used for different purpose
> and earlier kernel code was mistakenly overwrite the other bits.
> 
> First three changes(1/4-3/4) are SCM driver specific while 4/4 from
> pinctrl try to use the introduced API(1/3).
> 
> Changes from v9: https://lore.kernel.org/lkml/1698648967-974-1-git-send-email-quic_mojha@quicinc.com/
>   - Added 3/4 new patch.
>   - commit subject modification.
> 
> Change from v8: https://lore.kernel.org/lkml/1698235506-16993-1-git-send-email-quic_mojha@quicinc.com/
>   - Introduce enum for dload mode constants as per suggestion from [Elliot].
>   - Rebased on linux-next.
> 
> Changes from v7: https://lore.kernel.org/lkml/1696440338-12561-1-git-send-email-quic_mojha@quicinc.com/
>   - Rebased it on next-20231025.
>   - Added reviewed-by tag and take care of comment made about
>     commit text should be in imperative mode.
>   - Modified the name of the API to qcom_scm_io_rmw() as per suggestion
>     made by [Dmitry]
>   - Moved spinlock inside qcom_scm structure.
>   - Corrected the patch order as per subsystem SCM first then pinctrl.
> 
> Change from minidump-v5(13/17-15/17):https://lore.kernel.org/lkml/1694429639-21484-1-git-send-email-quic_mojha@quicinc.com/ - Removed mistakenly added macros.
>     https://lore.kernel.org/lkml/9da888dc-401a-4cbb-b616-b4654fa79e35@quicinc.com/
>   - Added Acked-by tag from Linus.w to 2/3.
> Change from minidump-v5(13/17-15/17):https://lore.kernel.org/lkml/1694429639-21484-1-git-send-email-quic_mojha@quicinc.com/
>   - Removed mistakenly added macros.
>     https://lore.kernel.org/lkml/9da888dc-401a-4cbb-b616-b4654fa79e35@quicinc.com/
>   - Added Acked-by tag from Linus.w to 2/3.
> 
> Changes in v6: https://lore.kernel.org/lkml/1680076012-10785-1-git-send-email-quic_mojha@quicinc.com/
>   - Rebased it on latest tag available on linux-next
>   - Added missed Poovendhan sign-off on 15/17 and tested-by tag from
>     Kathiravan. Thanks to him for testing and reminding me of missing sign-off.
>   - Addressed comments made on dload mode patch v6 version
> 
> Changes in v5: https://lore.kernel.org/lkml/1680017869-22421-1-git-send-email-quic_mojha@quicinc.com/
>    - Tried to fix the issue reported by kernel test robot
>      https://lore.kernel.org/lkml/202303280535.acb66sQT-lkp@intel.com/
> 
>    - Applied some of the improvement suggested by [Bjorn.andersson]
> 
>      . Dropped 'both' instead support full,mini or mini,full for setting download
>      mode to collect both minidump and full dump.
> 
>      . logging improvement.
> 
> Changes in v4: https://lore.kernel.org/lkml/1679935281-18445-1-git-send-email-quic_mojha@quicinc.com/
>    - val should be shifted within the function [srinivas.kandagatla]
>      i.e new = (old & ~mask) | (val << ffs(mask) - 1);
>    - Added Acked-by [linus.walleij] on pinctrl change.
> 
> Changes in v3 : https://lore.kernel.org/lkml/1679070482-8391-1-git-send-email-quic_mojha@quicinc.com/
>   - Removed [1] from the series and sent as a separate patch[2], although this series
>     should be applied on top [2].
>    [1] https://lore.kernel.org/lkml/1677664555-30191-2-git-send-email-quic_mojha@quicinc.com/
>    [2] https://lore.kernel.org/lkml/1678979666-551-1-git-send-email-quic_mojha@quicinc.com/
>   - Introduce new exported symbol on suggestion from [srinivas.kandagatla]
>   - Use the symbol from drivers/pinctrl/qcom/pinctrl-msm.c.
>   - Addressed comment given by [dmitry.baryshkov]
>   - Converted non-standard Originally-by to Signed-off-by.
> 
> Changes in v2: https://lore.kernel.org/lkml/1677664555-30191-1-git-send-email-quic_mojha@quicinc.com/
>   - Addressed comment made by [bjorn]
>   - Added download mask.
>   - Passed download mode as parameter
>   - Accept human accepatable download mode string.
>   - enable = !!dload_mode
>   - Shifted module param callback to somewhere down in
>     the file so that it no longer need to know the
>     prototype of qcom_scm_set_download_mode()
>   - updated commit text.
> 
> 
> Mukesh Ojha (4):
>    firmware: qcom: scm: provide a read-modify-write function
>    firmware: qcom: scm: Modify only the download bits in TCSR register
>    firmware: qcom: scm: Rework dload mode availability check
>    pinctrl: qcom: Use qcom_scm_io_rmw() function
> 
>   drivers/firmware/qcom/qcom_scm.c       | 50 ++++++++++++++++++++++++++++------
>   drivers/pinctrl/qcom/pinctrl-msm.c     | 10 +++----
>   include/linux/firmware/qcom/qcom_scm.h |  1 +
>   3 files changed, 47 insertions(+), 14 deletions(-)
>