linux-kernel - Re: [PATCH v2 6/8] drm/imx: support handling bridge timings bus flags

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Date:   Thu, 13 Sep 2018 10:38:50 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Stefan Agner <stefan@...er.ch>, linus.walleij@...aro.org,
        Laurent.pinchart@...asonboard.com, airlied@...ux.ie,
        robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
        s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, fabio.estevam@....com, linux-imx@....com,
        architt@...eaurora.org, a.hajda@...sung.com, gustavo@...ovan.org,
        maarten.lankhorst@...ux.intel.com, sean@...rly.run,
        marcel.ziswiler@...adex.com, max.krummenacher@...adex.com,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/8] drm/imx: support handling bridge timings bus
 flags

On Wed, 2018-09-12 at 11:32 -0700, Stefan Agner wrote:
> A bridge might require specific settings for the pixel data on
> the bus.

On which bus? The bridge has input and output.

> Copy the bus flags from the bridge timings if a bridge
> is in use.
> 
> Signed-off-by: Stefan Agner <stefan@...er.ch>
> ---
>  drivers/gpu/drm/imx/parallel-display.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c
> index aefd04e18f93..7798a0621df7 100644
> --- a/drivers/gpu/drm/imx/parallel-display.c
> +++ b/drivers/gpu/drm/imx/parallel-display.c
> @@ -239,6 +239,9 @@ static int imx_pd_bind(struct device *dev, struct device *master, void *data)
>  	if (ret && ret != -ENODEV)
>  		return ret;
>  
> +	if (imxpd->bridge && imxpd->bridge->timings)
> +		imxpd->bus_flags = imxpd->bridge->timings->input_bus_flags;

Oh, ok. I'd also specify input bus in the commit message.

> +
>  	imxpd->dev = dev;
>  
>  	ret = imx_pd_register(drm, imxpd);

regards
Philipp