Re: [PATCH v3 1/2] drm/bridge: Add Cadence DSI driver

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Hi Boris,


Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

On 31/08/17 18:55, Boris Brezillon wrote:
> Add a driver for Cadence DPI -> DSI bridge.
> 
> This driver only support a subset of Cadence DSI bridge capabilities.
> 
> Here is a non-exhaustive list of missing features:
>  * burst mode
>  * dynamic configuration of the DPHY based on the
>  * support for additional input interfaces (SDI input)
> 
> Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>

<snip>

> +	dsi->pclk = devm_clk_get(&pdev->dev, "pclk");
> +	if (IS_ERR(dsi->pclk))
> +		return PTR_ERR(dsi->pclk);

What's the purpose of pclk? Isn't that normally dealt with the normal
modesetting, enabled with the video stream? How could it even be enabled
here, without anyone setting the rate?

 Tomi

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