From: Akhil R <akhilrajeev@nvidia.com>
To: <ldewangan@nvidia.com>, <jonathanh@nvidia.com>,
<vkoul@kernel.org>, <thierry.reding@gmail.com>,
<p.zabel@pengutronix.de>, <dmaengine@vger.kernel.org>,
<linux-tegra@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<robh+dt@kernel.org>, <devicetree@vger.kernel.org>,
<krzysztof.kozlowski+dt@linaro.org>, <sfr@canb.auug.org.au>
Cc: <akhilrajeev@nvidia.com>
Subject: [PATCH v3 0/3] Tegra GPCDMA: Add channel-mask support
Date: Tue, 1 Nov 2022 13:57:09 +0530 [thread overview]
Message-ID: <20221101082712.59263-1-akhilrajeev@nvidia.com> (raw)
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
next reply other threads:[~2022-11-01 8:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-01 8:27 Akhil R [this message]
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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