** Changed in: linux-xilinx-zynqmp (Ubuntu Jammy)
Status: New => Invalid
** Changed in: linux-xilinx-zynqmp (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/2041782
Title:
spi: spi-cadence-quadspi: Fix ospi resume failures conflicts
Status in linux-xilinx-zynqmp package in Ubuntu:
Invalid
Status in linux-xilinx-zynqmp source package in Jammy:
Invalid
Bug description:
jammy:xilinx-zynqmp is carrying a patch subject "spi: spi-cadence-
quadspi: Fix ospi resume failure" from the Xilinx tree , branch
xlnx_rebase_v5.15_LTS_2022.1_update . This commit hasn't been
upstreamed and completely rewrites the function cqspi_resume(). A
change has landed in the v5.15.111 upstream stable release which
conflicts with this Xilinx patch in such a way that we don't know how
to resolve the conflicts and keep the functionality intact.
We have found where Xlinx resolved the merge on the XIlinx 6.1 branch
but it doesn't seem correct. In the original commit:
(https://github.com/Xilinx/linux-
xlnx/commit/6edac18033db445439ca57c23b8cee29a6bbdf0f)
in the function cqspi_resume() , the call to cqspi_controller_enable() is
removed and ZynqMP specific controls are added. Upstream fixed an issue with
suspend-resume
(https://github.com/torvalds/linux/commit/2087e85bb66ee3652dafe732bb9b9b896229eafc).
The upstream fix replaces the cqspi_controller_enable() with some clock
initializations and a call to cqspi_controller_init() which does some register
writes before calling cqspi_controller_enable(). Xilinx resolve the conflict by
concatenating the two commit's changes to
cqspi_resume()
(https://github.com/Xilinx/linux-xlnx/blob/xlnx_rebase_v6.1_LTS_2023.1_update/drivers/spi/spi-cadence-quadspi.c#L2271),
the end result is that cqspi_resume() consists of ZynqMP specific controls
followed by a (nested) call to cqspi_controller_enable(), the exact function
call that was removed in XIlinx's original commit.
This bug is to track how this merge conflict is resolved.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-xilinx-zynqmp/+bug/2041782/+subscriptions
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