On 06/08/2020 08:30, Rajesh Gumasta wrote:
> Adding GPC DMA controller driver for Tegra186 and Tegra194. The driver
> supports dma transfers between memory to memory, IO peripheral to memory
> and memory to IO peripheral.
>
> Signed-off-by: Pavan Kunapuli
> Signed-off-by: Rajesh Gumasta
> ---
On 06/08/2020 08:30, Rajesh Gumasta wrote:
> Adding GPC DMA controller driver for Tegra186 and Tegra194. The driver
> supports dma transfers between memory to memory, IO peripheral to memory
> and memory to IO peripheral.
>
> Signed-off-by: Pavan Kunapuli
> Signed-off-by: Rajesh Gumasta
> ---
rnel.org; linux-
> te...@vger.kernel.org; linux-kernel@vger.kernel.org
> Cc: Krishna Yarlagadda ; Pavan Kunapuli
>
> Subject: Re: [Patch v2 2/4] dmaengine: tegra: Add Tegra GPC DMA driver
>
> External email: Use caution opening links or attachments
>
>
> 06.08.2020 10:30,
06.08.2020 16:56, Rajesh Gumasta пишет:
...
>>> +static const struct __maybe_unused dev_pm_ops
>> tegra_dma_dev_pm_ops = {
>>> + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_dma_pm_suspend,
>>> +tegra_dma_pm_resume) };
>>
>> Please explain why this is needed. All DMA should be stopped (not
>> paused) on
06.08.2020 10:30, Rajesh Gumasta пишет:
...
> +/*
> + * Save and restore csr and channel register on pm_suspend
> + * and pm_resume respectively
> + */
> +static int __maybe_unused tegra_dma_pm_suspend(struct device *dev)
> +{
> + struct tegra_dma *tdma = dev_get_drvdata(dev);
> + int i;
>
06.08.2020 10:30, Rajesh Gumasta пишет:
> +static int tegra_dma_program_sid(struct tegra_dma_channel *tdc,
> + int chan, int stream_id)
> +{
> + unsigned int reg_val = tdc_read(tdc, TEGRA_GPCDMA_CHAN_MCSEQ);
> +
> + reg_val &= ~(TEGRA_GPCDMA_MCSEQ_STREAM_ID_MAS
06.08.2020 10:30, Rajesh Gumasta пишет:
> +static struct dma_async_tx_descriptor *tegra_dma_prep_dma_memset(
> + struct dma_chan *dc, dma_addr_t dest, int value, size_t len,
> + unsigned long flags)
> +{
This looks and reads okay, although the following style of code's
formatting is a bit
Adding GPC DMA controller driver for Tegra186 and Tegra194. The driver
supports dma transfers between memory to memory, IO peripheral to memory
and memory to IO peripheral.
Signed-off-by: Pavan Kunapuli
Signed-off-by: Rajesh Gumasta
---
drivers/dma/Kconfig | 12 +
drivers/dma/Makefile
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