linux.git/drivers/dma/ti, branch v6.6

dmaengine: ti: k3-udma-glue: clean up k3_udma_glue_tx_get_irq() return

2023-10-04T09:29:55+00:00

The k3_udma_glue_tx_get_irq() function currently returns negative error
codes on error, zero on error and positive values for success.  This
complicates life for the callers who need to propagate the error code.
Also GCC will not warn about unsigned comparisons when you check:

	if (unsigned_irq <= 0)

All the callers have been fixed now but let's just make this easy going
forward.

Signed-off-by: Dan Carpenter 
Reviewed-by: Roger Quadros 
Acked-by: Vinod Koul 
Signed-off-by: David S. Miller

dmaengine: Explicitly include correct DT includes

2023-08-01T18:21:27+00:00

The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring 
Link: https://lore.kernel.org/r/20230718143138.1066177-1-robh@kernel.org
Signed-off-by: Vinod Koul

Merge tag 'dmaengine-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine

2023-07-06T16:48:31+00:00

Pull dmaengine updates from Vinod Koul:
 "New support:
   - TI J721S2 CSI BCDMA support

  Updates:
   - Native HDMI support for dw edma driver
   - ste dma40 updates for supporting proper SRAM handle in DT
   - removal of dma device chancnt setting in drivers"

* tag 'dmaengine-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (28 commits)
  dmaengine: sprd: Don't set chancnt
  dmaengine: hidma: Don't set chancnt
  dmaengine: plx_dma: Don't set chancnt
  dmaengine: axi-dmac: Don't set chancnt
  dmaengine: dw-axi-dmac: Don't set chancnt
  dmaengine: qcom: bam_dma: allow omitting num-{channels,ees}
  dmaengine: dw-edma: Add HDMA DebugFS support
  dmaengine: dw-edma: Add support for native HDMA
  dmaengine: dw-edma: Create a new dw_edma_core_ops structure to abstract controller operation
  dmaengine: dw-edma: Rename dw_edma_core_ops structure to dw_edma_plat_ops
  dmaengine: ste_dma40: use proper format string for resource_size_t
  dmaengine: make QCOM_HIDMA depend on HAS_IOMEM
  dmaengine: ste_dma40: fix typo in enum documentation
  dmaengine: ste_dma40: use correct print specfier for resource_size_t
  MAINTAINERS: Add myself as the DW eDMA driver reviewer
  MAINTAINERS: Add Manivannan to DW eDMA driver maintainers list
  MAINTAINERS: Demote Gustavo Pimentel to DW EDMA driver reviewer
  dmaengine: ti: k3-udma: Add support for J721S2 CSI BCDMA instance
  dt-bindings: dma: ti: Add J721S2 BCDMA
  dmaengine: ti: k3-psil-j721s2: Add PSI-L thread map for main CPSW2G
  ...

dmaengine: ti: k3-udma: annotate pm function with __maybe_unused

2023-05-17T06:45:47+00:00

We get a warning when PM is not set:

../drivers/dma/ti/k3-udma.c:5552:12: warning: 'udma_pm_resume' defined but not used [-Wunused-function]
 5552 | static int udma_pm_resume(struct device *dev)
      |            ^~~~~~~~~~~~~~
../drivers/dma/ti/k3-udma.c:5530:12: warning: 'udma_pm_suspend' defined but not used [-Wunused-function]
 5530 | static int udma_pm_suspend(struct device *dev)
      |            ^~~~~~~~~~~~~~~

Fix this by annotating pm function with __maybe_unused

Fixes: fbe05149e40b ("dmaengine: ti: k3-udma: Add system suspend/resume support")
Reported-by: Randy Dunlap 
Signed-off-by: Vinod Koul 
Acked-by: Randy Dunlap 
Tested-by: Randy Dunlap  # build-tested
Link: https://lore.kernel.org/r/20230516174311.117264-1-vkoul@kernel.org
Signed-off-by: Vinod Koul

dmaengine: ti: k3-udma: Add support for J721S2 CSI BCDMA instance

2023-05-16T17:55:52+00:00

J721S2 has dedicated BCDMA instance for Camera Serial Interface RX
and TX. The BCDMA instance supports RX and TX channels but block copy
channels are not present, add support for the same.

Signed-off-by: Vaishnav Achath 
Link: https://lore.kernel.org/r/20230505143929.28131-3-vaishnav.a@ti.com
Signed-off-by: Vinod Koul

dmaengine: ti: k3-psil-j721s2: Add PSI-L thread map for main CPSW2G

2023-05-16T17:51:29+00:00

Add PSI-L thread map for main CPSW2G.

Signed-off-by: Kishon Vijay Abraham I 
Signed-off-by: Siddharth Vadapalli 
Acked-by: Peter Ujfalusi 
Link: https://lore.kernel.org/r/20230511034704.656155-1-s-vadapalli@ti.com
Signed-off-by: Vinod Koul

dmaengine: ti: k3-psil: Add PSI-L thread support for J784s4

2023-03-31T12:47:06+00:00

Add psil thread IDs for J784s4 and include J784s4 in the set of
"k3_soc_devices" in k3-psil.c.

Signed-off-by: Apurva Nandan 
Signed-off-by: Hari Nagalla 
Signed-off-by: Siddharth Vadapalli 
Signed-off-by: Vignesh Raghavendra 
[vaishnav.a@ti.com: add MCSPI-TX and 3rd CSI2RX instance entries]
Signed-off-by: Vaishnav Achath 
[j-choudhary@ti.com: add sa2ul entries, minor cleanups]
Signed-off-by: Jayesh Choudhary 
Acked-by: Peter Ujfalusi 
Link: https://lore.kernel.org/r/20230308201513.116638-1-j-choudhary@ti.com
Signed-off-by: Vinod Koul

dmaengine: ti: edma: remove unused edma_and function

2023-03-31T12:27:49+00:00

clang with W=1 reports
drivers/dma/ti/edma.c:321:20: error: unused function
  'edma_and' [-Werror,-Wunused-function]
static inline void edma_and(struct edma_cc *ecc, int offset, unsigned and)
                   ^
This function is not used, so remove it.

Signed-off-by: Tom Rix 
Link: https://lore.kernel.org/r/20230320231209.1728940-1-trix@redhat.com
Signed-off-by: Vinod Koul

dmaengine: ti: k3-udma: Workaround errata i2234

2023-03-31T12:19:36+00:00

Per [1], UDMA TR15 transactions may hang if ICNT0 is less than 64B
Work around is to set EOL flag is to 1 for ICNT0.

Since, there is no performance penalty / side effects of setting EOL
flag event ICNTO > 64B, just set the flag for all UDMAP TR15
descriptors.

[1] https://www.ti.com/lit/er/sprz455a/sprz455a.pdf
Errata doc for J721E DRA829/TDA4VM Processors Silicon Revision 1.1/1.0
(Rev. A)

Signed-off-by: Vignesh Raghavendra 
[j-choudhary@ti.com: minor cleanups]
Signed-off-by: Jayesh Choudhary 
Link: https://lore.kernel.org/r/20230323120107.27638-1-j-choudhary@ti.com
Signed-off-by: Vinod Koul

dmaengine: ti: k3-udma: Add system suspend/resume support

2023-03-31T08:06:00+00:00

The K3 platforms configure the DMA resources with the
help of the TI's System Firmware's Device Manager(DM)
over TISCI. The group of DMA related Resource Manager[1]
TISCI messages includes: INTA, RINGACC, UDMAP, and PSI-L.
This configuration however, does not persist in the DM
after leaving from Suspend-to-RAM state. We have to restore
the DMA channel configuration over TISCI for all configured
channels when returning from suspend.

The TISCI resource management calls for each DMA type (UDMA,
PKTDMA, BCDMA) happen in device_free_chan_resources() and
device_alloc_chan_resources(). In pm_suspend() we store
the current udma_chan_config for channels that still have
attached clients and call device_free_chan_resources().
In pm_resume() restore the udma_channel_config from backup
and call device_alloc_chan_resources() for those channels.

Drivers like CPSW that use k3-udma-glue already do their own
DMA resource management so use the late system suspend/resume hooks.

[1] https://software-dl.ti.com/tisci/esd/latest/2_tisci_msgs/index.html#resource-management-rm

Signed-off-by: Vignesh Raghavendra 
[g-vlaev@ti.com: Add patch description and config backup]
[g-vlaev@ti.com: Supend only channels with clients]
Signed-off-by: Georgi Vlaev 
Acked-by: Peter Ujfalusi 
Link: https://lore.kernel.org/r/20230329155349.2566010-1-vigneshr@ti.com
Signed-off-by: Vinod Koul