[0/3] spi: spi-geni-qcom: Avoid a bunch of per-transfer overhead

Message

Doug Anderson July 2, 2020, 12:45 a.m. UTC

This series tries to reduce a whole bunch of overhead in each SPI
transfer.  Much of this overhead is new with the recent interconnect
changes, but even without those changes we still had some overhead
that we could avoid.  Let's avoid all of it.

These changes are atop the Qualcomm tree to avoid merge conflicts.  If
they look good, the most expedient way to land them is probably to get
Ack's from Mark and land then via the Qualcomm tree.

Most testing was done on the Chrome OS 5.4 tree, but sanity check was
done on mainline.


Douglas Anderson (3):
  spi: spi-geni-qcom: Avoid clock setting if not needed
  spi: spi-geni-qcom: Set an autosuspend delay of 250 ms
  spi: spi-geni-qcom: Get rid of most overhead in prepare_message()

 drivers/spi/spi-geni-qcom.c | 67 ++++++++++++++++++-------------------
 1 file changed, 32 insertions(+), 35 deletions(-)

Comments

Mark Brown July 7, 2020, 2:17 p.m. UTC | #1

On Wed, 1 Jul 2020 17:45:06 -0700, Douglas Anderson wrote:
> This series tries to reduce a whole bunch of overhead in each SPI
> transfer.  Much of this overhead is new with the recent interconnect
> changes, but even without those changes we still had some overhead
> that we could avoid.  Let's avoid all of it.
> 
> These changes are atop the Qualcomm tree to avoid merge conflicts.  If
> they look good, the most expedient way to land them is probably to get
> Ack's from Mark and land then via the Qualcomm tree.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next

Thanks!

[1/3] spi: spi-geni-qcom: Avoid clock setting if not needed
      (no commit info)
[2/3] spi: spi-geni-qcom: Set an autosuspend delay of 250 ms
      commit: e99f0b6ef2679b0abeefcd7bd148cd65651c7857
[3/3] spi: spi-geni-qcom: Get rid of most overhead in prepare_message()
      (no commit info)

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark