Re: Process identical patches in different tree

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On 08/01/2020 12:14, Matthias Brugger wrote:
> Hi CK,
> 
> On 07/01/2020 03:56, CK Hu wrote:
>> Hi, Dave, Daniel, Matthias:
>>
>> In mediatek-drm-next-5.6 [1], I've cherry-pick 3 patches from
>> v5.5-next/soc [2] because some drm patches depend on these cmdq patches.
>> So these cmdq patches exist in both tree now. I want to know how to
>> process this case. I think we could choose one of below way:
>>
>> 1. Because these cmdq patches are identical in both tree, so each tree
>> could do its own upstream and the there would be nothing happen when
>> merge.
>> 2. Let soc upstream first, and mediatek drm rebase on the latest
>> mainline then upstream.
>>
>> Which one do you prefer?
>>
> 
> What we would need is a stable branch with this commits that get merged by both
> trees. If I understand correctly that otherwise the SHA of the commits would be
> different and that would provoke merge conflicts.
> 
> We should not rely on one tree being merged before the other. AFAIK there is no
> hard merge order between trees.
> 

I prepared a branch with the patches I think are relevant for you. Please
confirm that this is correct, merge the tree in yours and I'll do the same for
v5.5-next/soc

<paste>

The following changes since commit e42617b825f8073569da76dc4510bfa019b1c35a:

  Linux 5.5-rc1 (2019-12-08 14:57:55 -0800)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/matthias.bgg/linux.git/
tags/v5.5-next-cmdq-stable

for you to fetch changes up to d412f18c9bc791d8951e903de9a68817e3098a6a:

  soc: mediatek: cmdq: add cmdq_dev_get_client_reg function (2020-01-08 12:59:57
+0100)

----------------------------------------------------------------
cmdq patches needed by drm driver to use cmdq interface

----------------------------------------------------------------
Bibby Hsieh (4):
      soc: mediatek: cmdq: remove OR opertaion from err return
      soc: mediatek: cmdq: define the instruction struct
      soc: mediatek: cmdq: add polling function
      soc: mediatek: cmdq: add cmdq_dev_get_client_reg function

 drivers/soc/mediatek/mtk-cmdq-helper.c   | 147
++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------
 include/linux/mailbox/mtk-cmdq-mailbox.h |  11 ++++++
 include/linux/soc/mediatek/mtk-cmdq.h    |  53 +++++++++++++++++++++++++
 3 files changed, 185 insertions(+), 26 deletions(-)

</paste>

Regards,
Matthias
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