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  1. 05 12月, 2018 3 次提交
  3. 30 7月, 2018 2 次提交
  5. 06 7月, 2018 1 次提交
    • R
      dmaengine: imx-sdma: add missing structure description · 24ca312d
      由 Robin Gong 提交于 
      Some member description or colons missing cause build warning with
'W=1' as below:

drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'vd' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'num_bd' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'bd_phys' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'buf_tail' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'buf_ptail' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'period_len' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'chn_real_count' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'chn_count' not described in 'sdma_desc
Signed-off-by: NRobin Gong <yibin.gong@nxp.com>
Reported-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NVinod Koul <vkoul@kernel.org>
      24ca312d
  7. 02 7月, 2018 9 次提交
  9. 23 5月, 2018 1 次提交
  11. 05 3月, 2018 1 次提交
  13. 22 12月, 2017 1 次提交
  15. 22 9月, 2017 1 次提交
  17. 30 5月, 2017 2 次提交
  19. 27 3月, 2017 1 次提交
    • J
      dmaengine: imx-sdma: add 1ms delay to ensure SDMA channel is stopped · 7f3ff14b
      由 Jiada Wang 提交于 
      sdma_disable_channel() cannot ensure dma is stopped to access
module's FIFOs. There is chance SDMA core is running and accessing
BD when disable of corresponding channel, this may cause sometimes
even after call of .sdma_disable_channel(), SDMA core still be
running and accessing module's FIFOs.

According to NXP R&D team a delay of one BD SDMA cost time (maximum
is 1ms) should be added after disable of the channel bit, to ensure
SDMA core has really been stopped after SDMA clients call
.device_terminate_all.

This patch introduces adds a new function sdma_disable_channel_with_delay()
which simply adds 1ms delay after call sdma_disable_channel(),
and set it as .device_terminate_all.
Signed-off-by: NJiada Wang <jiada_wang@mentor.com>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>
      7f3ff14b
  21. 14 3月, 2017 1 次提交
  23. 25 11月, 2016 1 次提交
  25. 31 8月, 2016 3 次提交
  27. 11 8月, 2016 1 次提交
  29. 08 8月, 2016 1 次提交
  31. 23 7月, 2016 2 次提交
  33. 16 7月, 2016 1 次提交
    • V
      dmaengine: imx-sdma: explicitly freeup irq · 5bb9dbb5
      由 Vinod Koul 提交于 
      dmaengine device should explicitly call devm_free_irq() when using
devm_request_irq().

The irq is still ON when devices remove is executed and irq should be
quiesced before remove is completed.
Signed-off-by: NVinod Koul <vinod.koul@intel.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
      5bb9dbb5
  35. 12 7月, 2016 1 次提交
    • M
      dmaengine: imx-sdma: ack channel 0 IRQ in the interrupt handler · 1d069bfa
      由 Michael Olbrich 提交于 
      Currently the handler ignores the channel 0 interrupt and thus doesn't ack
it properly. This is done in order to allow sdma_run_channel0() to poll
on the irq status bit, as this function may be called in atomic context,
but needs to know when the channel has finished.

This works mostly, as the polling happens under a spinlock, disabling IRQs
on the local CPU, leaving only a very slight race window for a spurious
IRQ to happen if the handler is executed on another CPU in an SMP system.
Still this is clearly suboptimal.
This behavior turns into a real problem on an RT system, where the spinlock
doesn't disable IRQs on the local CPU. Not acking the IRQ in the handler
in such a setup is very likely to drown the CPU in an IRQ storm, leaving
it unable to make any progress in the polling loop, leading to the IRQ
never being acked.

Fix this by properly acknowledging the channel 0 IRQ in the handler.
As the IRQ status bit can no longer be used to poll for the channel
completion, switch over to using the SDMA_H_STATSTOP register for this
purpose, where bit 0 is cleared by the hardware when the channel is done.
Signed-off-by: NMichael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: NLucas Stach <l.stach@pengutronix.de>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>
      1d069bfa
  37. 16 11月, 2015 1 次提交
    • J
      dmaengine: imx-sdma: remove __init annotation on sdma_event_remap · 29f493da
      由 Jason Liu 提交于 
      The sdma_probe function will call sdma_event_remap, but sdma_event_remap
marked with the __init annotation which make the kbuild complains as the
following log:

WARNING: drivers/dma/built-in.o(.text+0x56fc): Section mismatch in reference
from the function sdma_probe() to the function .init.text:sdma_event_remap()
The function sdma_probe() references
the function __init sdma_event_remap().
This is often because sdma_probe lacks a __init
annotation or the annotation of sdma_event_remap is wrong.

Remove the __init annotation on sdma_event_remap to kill this build warning
Signed-off-by: NJason Liu <r64343@freescale.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>
      29f493da
  39. 07 10月, 2015 2 次提交
  41. 20 8月, 2015 1 次提交
  43. 19 8月, 2015 1 次提交
  45. 05 8月, 2015 1 次提交
  47. 04 5月, 2015 1 次提交