linux-kernel - Re: [PATCH 0/6] Add support for Tegra186/Tegra194 and generic fixes

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Date:   Thu, 2 May 2019 14:36:10 +0100
From:   Jon Hunter <jonathanh@...dia.com>
To:     Sameer Pujar <spujar@...dia.com>, <vkoul@...nel.org>,
        <dan.j.williams@...el.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>
CC:     <thierry.reding@...il.com>, <ldewangan@...dia.com>,
        <dmaengine@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/6] Add support for Tegra186/Tegra194 and generic fixes


On 02/05/2019 13:55, Sameer Pujar wrote:
> Audio DMA(ADMA) interface is a gateway in the AHUB for facilitating DMA
> transfers between memory and all of its clients. Currently the driver
> supports Tegra210 based platforms. This series adds support for Tegra186
> and Tegra194 based platforms and fixes few functional issues.
> 
> Patches in the series are classified into three categories,
>   1. Add support for Tegra186 and Tegra194
>   2. Add DMA pause/resume feature
>   3. Fixes common to differernt Tegra generations
> 
> Below change log describes the patches in detail.
> 
> Change log:
> =====================================
> v1
> ----
> The series can be classified into 3 categories,
>   1. Add support for Tegra186 and Tegra194
>      [Patch 1/6] dmaengine: tegra210-adma: prepare for supporting newer
>      Tegra chips
>        * The support was there only for Tegra210
>        * This is a preparation for adding support for newer Tegra chips
>        * chip_data is enhanced to support differences between Tegra210 and
>          Tegra186/Tegra194
>      [Patch 2/6] Documentation: DT: Add compatibility binding for Tegra186
>        * New compatibility string is required for driver to work for
>          Tegra186 and Tegra194. Hence new compatibility is introduced.
>        * Tegra194 can use the same compatibility as Tegra186
>      [Patch 3/6] dmaengine: tegra210-adma: add support for Tegra186/
>      Tegra194
>        * Populates chip specific information for Tegra186
>        * There is a difference in the way ADMA CH_CONFIG registers are
>          encoded for Tegra210 and Tegra186. Added helper fucntions to
>          support different versions of burst size configuration
> 
>   2. Add DMA pause/resume feature
>      [Patch 4/6] dmaengine: tegra210-adma: add pause/resume support
>        * Adds support for ADMA pause/resume, otherwise audio loss was seen
>          during continuous pause/resume of audio playback.
> 
>   3. Fixes common to differernt Tegra generations
>      [Patch 5/6] dmaengine: tegra210-dma: free dma controller in remove()
>        * Fixes kernel panic observed during driver reload. DMA controller
>          needs to be freed when driver is unloaded
>      [Patch 6/6] dmaengine: tegra210-adma: restore channel status
>        * Fixes resume across system suspend. If the channel state is not
>          restored, the transfers won't resume from the state from where it
>          was left during suspend entry. In this case, audio playback did
>          not resume properly once system exited from low power state.
> 
> ===============================
> Sameer Pujar (6):
>   dmaengine: tegra210-adma: prepare for supporting newer Tegra chips
>   Documentation: DT: Add compatibility binding for Tegra186
>   dmaengine: tegra210-adma: add support for Tegra186/Tegra194
>   dmaengine: tegra210-adma: add pause/resume support
>   dmaengine: tegra210-dma: free dma controller in remove()
>   dmaengine: tegra210-adma: restore channel status
> 
>  .../bindings/dma/nvidia,tegra210-adma.txt     |   4 +-
>  drivers/dma/tegra210-adma.c                   | 232 +++++++++++++++++----
>  2 files changed, 193 insertions(+), 43 deletions(-)
> 

Thanks!

For the series ...

Reviewed-by: Jon Hunter <jonathanh@...dia.com>

Cheers
Jon

-- 
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