linux-kernel - Re: [RFC PATCH 2/6] drm: Add skeleton for EPDC driver

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Date:   Sat, 12 Mar 2022 20:41:59 +0100
From:   Jonathan Neuschäfer <j.neuschaefer@....net>
To:     Andreas Kemnade <andreas@...nade.info>
Cc:     p.zabel@...gutronix.de, airlied@...ux.ie, daniel@...ll.ch,
        robh+dt@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        tzimmermann@...e.de, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, alistair@...stair23.me,
        samuel@...lland.org, josua.mayer@....eu,
        letux-kernel@...nphoenux.org
Subject: Re: [RFC PATCH 2/6] drm: Add skeleton for EPDC driver

On Sun, Feb 06, 2022 at 09:00:12AM +0100, Andreas Kemnade wrote:
> This driver is for the EPD controller in the i.MX SoCs. Add a skeleton
> and basic things for the driver
> 
> Signed-off-by: Andreas Kemnade <andreas@...nade.info>
> ---
>  drivers/gpu/drm/Kconfig                 |   2 +
>  drivers/gpu/drm/Makefile                |   1 +
>  drivers/gpu/drm/mxc-epdc/Kconfig        |  15 +
>  drivers/gpu/drm/mxc-epdc/Makefile       |   5 +
>  drivers/gpu/drm/mxc-epdc/epdc_regs.h    | 442 ++++++++++++++++++++++++
>  drivers/gpu/drm/mxc-epdc/mxc_epdc.h     |  20 ++
>  drivers/gpu/drm/mxc-epdc/mxc_epdc_drv.c | 248 +++++++++++++
>  7 files changed, 733 insertions(+)
>  create mode 100644 drivers/gpu/drm/mxc-epdc/Kconfig
>  create mode 100644 drivers/gpu/drm/mxc-epdc/Makefile
>  create mode 100644 drivers/gpu/drm/mxc-epdc/epdc_regs.h
>  create mode 100644 drivers/gpu/drm/mxc-epdc/mxc_epdc.h
>  create mode 100644 drivers/gpu/drm/mxc-epdc/mxc_epdc_drv.c
> 
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index b1f22e457fd0..6b6b44ff7556 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -390,6 +390,8 @@ source "drivers/gpu/drm/gud/Kconfig"
>  
>  source "drivers/gpu/drm/sprd/Kconfig"
>  
> +source "drivers/gpu/drm/mxc-epdc/Kconfig"

I'd put it under gpu/drm/imx/epdc, perhaps.

> +int mxc_epdc_output(struct drm_device *drm)
> +{
> +	struct mxc_epdc *priv = to_mxc_epdc(drm);
> +	int ret;
> +
> +	priv->connector.dpms = DRM_MODE_DPMS_OFF;
> +	priv->connector.polled = 0;
> +	drm_connector_helper_add(&priv->connector,
> +				 &mxc_epdc_connector_helper_funcs);
> +	ret = drm_connector_init(drm, &priv->connector,
> +				 &mxc_epdc_connector_funcs,
> +				 DRM_MODE_CONNECTOR_Unknown);
> +	if (ret)
> +		return ret;
> +	ret = of_get_display_timing(drm->dev->of_node, "timing", &priv->timing);
> +	if (ret)
> +		return ret;
> +
> +	return 0;

Possible to simplify to:

	return of_get_display_timing(drm->dev->of_node, "timing", &priv->timing);



Jonathan

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