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* [PATCH v3 0/3] Tegra GPCDMA: Add channel-mask support
@ 2022-11-01  8:27 Akhil R
  2022-11-01  8:27 ` [PATCH v3 1/3] dt-bindings: dmaengine: Add dma-channel-mask to Tegra GPCDMA Akhil R
                   ` (2 more replies)
  0 siblings, 3 replies; 5+ messages in thread
From: Akhil R @ 2022-11-01  8:27 UTC (permalink / raw)
  To: ldewangan, jonathanh, vkoul, thierry.reding, p.zabel, dmaengine,
	linux-tegra, linux-kernel, robh+dt, devicetree,
	krzysztof.kozlowski+dt, sfr
  Cc: akhilrajeev

Read dma-channel-mask from device tree and register only the
specified channels. This is useful to reserve some channels for the
firmware.

Also update the channel number and interrupts to include all 32
channels. The current driver was using only 31 channels as one
channel was reserved for firmware. Now with this change, the driver
can align more to the actual hardware.

v2->v3:
  * Updates in driver and DT to provide only the interrupts
    corresponding to the channels used in kernel. This would fix
    the ABI breakage that could occur with the previous version

v1->v2:
  * Reversed the operands and used BIT macro in 'if' condition.
  * Fixed warning reported-by: kernel test robot <lkp@intel.com>

Akhil R (3):
  dt-bindings: dmaengine: Add dma-channel-mask to Tegra GPCDMA
  arm64: tegra: Add dma-channel-mask in GPCDMA node
  dmaengine: tegra: Add support for dma-channel-mask

 .../bindings/dma/nvidia,tegra186-gpc-dma.yaml |  7 ++-
 arch/arm64/boot/dts/nvidia/tegra186.dtsi      |  1 +
 arch/arm64/boot/dts/nvidia/tegra194.dtsi      |  1 +
 arch/arm64/boot/dts/nvidia/tegra234.dtsi      |  1 +
 drivers/dma/tegra186-gpc-dma.c                | 46 +++++++++++++++----
 5 files changed, 46 insertions(+), 10 deletions(-)

-- 
2.17.1


^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2022-11-02 10:12 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-11-01  8:27 [PATCH v3 0/3] Tegra GPCDMA: Add channel-mask support Akhil R
2022-11-01  8:27 ` [PATCH v3 1/3] dt-bindings: dmaengine: Add dma-channel-mask to Tegra GPCDMA Akhil R
2022-11-01  8:27 ` [PATCH v3 2/3] arm64: tegra: Add dma-channel-mask in GPCDMA node Akhil R
2022-11-01  8:27 ` [PATCH v3 3/3] dmaengine: tegra: Add support for dma-channel-mask Akhil R
2022-11-02 10:11   ` kernel test robot

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