[PATCH v2 0/5] K3 R5F & DSP IPC-only mode support

[Suman Anna]

Hi All,

The following is a revised version of the series that adds the IPC-only
mode support for the TI K3 R5F and DSP (C66x and C71x) remoteprocs
covering AM65x, J721E, J7200 and AM64x SoCs. Patches are on top of
5.14-rc1 (the other dependent patches from v1 made it into 5.14-rc1).

Please see the v1 cover-letter [1] for the design details of the
'IPC-only' mode functionality.

The following are the main changes from v1, please see the individual
patches for the exact deltas:
 - The first patch in v1 "remoteproc: Introduce rproc_detach_device()
   wrapper" is dropped
 - Removed the addition of the rproc state flag 'detach_on_shutdown'
   and the 'ipc-only' state flag in each of the remoteproc drivers
 - IPC-only mode and remoteproc mode are supported by registering only
   the appropriate rproc ops.

The following is a summary of patches in v2:
 - Patch 1 enhances the remoteproc core to restrict stop on early-booted
   remoteprocs. 
 - Patches 2 and 4 refactor the mailbox request code out of start
   in the K3 R5F and DSP remoteproc drivers for reuse in the new attach
   callbacks.
 - Patch 3 adds the IPC-only mode support for R5F.
 - Patch 5 adds the IPC-only mode support for both K3 C66x and C71x
   DSPs.

I have re-verified the different combinations on J721E, J7200 and AM65x
SoCs. AM64x currently lacks early-boot support, but the logic is ready
for Single-CPU and Split modes that are specific to AM64x SoCs. 

regards
Suman

[1] https://patchwork.kernel.org/project/linux-remoteproc/cover/20210522000309.26134-1-s-anna@ti.com/

Suman Anna (5):
  remoteproc: Add support for detach-only during shutdown
  remoteproc: k3-r5: Refactor mbox request code in start
  remoteproc: k3-r5: Add support for IPC-only mode for all R5Fs
  remoteproc: k3-dsp: Refactor mbox request code in start
  remoteproc: k3-dsp: Add support for IPC-only mode for all K3 DSPs

 drivers/remoteproc/remoteproc_cdev.c      |   7 +
 drivers/remoteproc/remoteproc_core.c      |   5 +-
 drivers/remoteproc/remoteproc_sysfs.c     |   6 +
 drivers/remoteproc/ti_k3_dsp_remoteproc.c | 197 ++++++++++++----
 drivers/remoteproc/ti_k3_r5_remoteproc.c  | 265 +++++++++++++++++++---
 5 files changed, 407 insertions(+), 73 deletions(-)

-- 
2.32.0