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52c74d3d35
linux/drivers/dma/ti
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Grygorii Strashko 52c74d3d35 dmaengine: ti: k3-udma-glue: fix channel enable functions 
Now the K3 UDMA glue layer enable functions perform RMW operation on UDMA
RX/TX RT_CTL registers to set EN bit and enable channel, which is
incorrect, because only EN bit has to be set in those registers to enable
channel (all other bits should be cleared 0).
More over, this causes issues when bootloader leaves UDMA channel RX/TX
RT_CTL registers in incorrect state - TDOWN bit set, for example. As
result, UDMA channel will just perform teardown right after it's enabled.

Hence, fix it by writing correct values (EN=1) directly in UDMA channel
RX/TX RT_CTL registers in k3_udma_glue_enable_tx/rx_chn() functions.

Fixes: d702419134 ("dmaengine: ti: k3-udma: Add glue layer for non DMAengine users")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200916120955.7963-1-grygorii.strashko@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-09-18 13:06:26 +05:30
..
cppi41.c dmaengine: cppi41: Fix cppi41_dma_prep_slave_sg() when idle 2019-10-23 21:15:21 +05:30
dma-crossbar.c dmaengine: ti: dma-crossbar: convert to devm_platform_ioremap_resource() 2020-02-13 20:47:52 +05:30
edma.c dmaengine: Replace zero-length array with flexible-array 2020-06-15 23:08:30 -05:00
k3-psil-am654.c dmaengine: ti: k3-psil: make symbols static 2020-01-21 13:10:24 +05:30
k3-psil-j721e.c dmaengine: ti: k3-psil-j721e: Add entries for 2nd port of MCU SA2UL 2020-08-17 10:50:31 +05:30
k3-psil-j7200.c dmaengine: ti: k3-psil: add map for j7200 2020-08-17 10:50:31 +05:30
k3-psil-priv.h dmaengine: ti: k3-psil: add map for j7200 2020-08-17 10:50:31 +05:30
k3-psil.c dmaengine: ti: k3-psil: add map for j7200 2020-08-17 10:50:31 +05:30
k3-udma-glue.c dmaengine: ti: k3-udma-glue: fix channel enable functions 2020-09-18 13:06:26 +05:30
k3-udma-private.c Merge branch 'for-linus' into fixes 2020-08-05 19:02:07 +05:30
k3-udma.c dmaengine: ti: k3-udma: Use soc_device_match() for SoC dependent parameters 2020-09-11 17:46:20 +05:30
k3-udma.h dmaengine: ti: k3-udma: Query throughput level information from hardware 2020-07-27 14:23:03 +05:30
Kconfig dmaengine: ti: k3-udma: Drop COMPILE_TEST for the drivers for now 2020-04-15 21:25:25 +05:30
Makefile dmaengine: ti: k3-psil: add map for j7200 2020-08-17 10:50:31 +05:30
omap-dma.c dmaengine: ti: omap-dma: Drop of_match_ptr to fix -Wunused-const-variable 2020-08-17 10:43:49 +05:30