[PATCH v9][ 6/8] staging: imx-drm: parallel display: add regulator support.

[Philipp Zabel]

Hi Denis,

Am Donnerstag, den 06.03.2014, 17:04 +0100 schrieb Denis Carikli:
> diff --git a/Documentation/devicetree/bindings/staging/imx-drm/fsl-imx-drm.txt b/Documentation/devicetree/bindings/staging/imx-drm/fsl-imx-drm.txt
> index 2d24425..4dd7ce5 100644
> --- a/Documentation/devicetree/bindings/staging/imx-drm/fsl-imx-drm.txt
> +++ b/Documentation/devicetree/bindings/staging/imx-drm/fsl-imx-drm.txt
> @@ -28,6 +28,7 @@ Required properties:
>  - compatible: Should be "fsl,imx-parallel-display"
>  - crtc: the crtc this display is connected to, see below
>  Optional properties:
> +- display-supply : phandle to the regulator device tree node if needed.

I'd very much prefer to not do this here. I have submitted a patch to
add drm_display support to this driver, so you can connect a drm_panel
compatible driver as output. The simple-panel driver already supports
supply regulator and backlight control.

regards
Philipp

>  - interface_pix_fmt: How this display is connected to the
>    crtc. Currently supported types: "rgb24", "rgb565", "bgr666", "rgb666"
>  - edid: verbatim EDID data block describing attached display.
> diff --git a/drivers/staging/imx-drm/parallel-display.c b/drivers/staging/imx-drm/parallel-display.c
> index 084500b..0e0c5ac 100644
> --- a/drivers/staging/imx-drm/parallel-display.c
> +++ b/drivers/staging/imx-drm/parallel-display.c
> @@ -24,6 +24,7 @@
>  #include <drm/drm_fb_helper.h>
>  #include <drm/drm_crtc_helper.h>
>  #include <drm/drm_panel.h>
> +#include <linux/regulator/consumer.h>
>  #include <linux/videodev2.h>
>  #include <video/of_display_timing.h>
>  
> @@ -36,6 +37,7 @@ struct imx_parallel_display {
>  	struct drm_connector connector;
>  	struct drm_encoder encoder;
>  	struct device *dev;
> +	struct regulator *disp_reg;
>  	void *edid;
>  	int edid_len;
>  	u32 interface_pix_fmt;
> @@ -155,6 +157,9 @@ static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
>  {
>  	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
>  
> +	if (regulator_enable(imxpd->disp_reg))
> +		dev_err(imxpd->dev, "Failed to enable regulator.\n");
> +
>  	imx_drm_panel_format(encoder, imxpd->interface_pix_fmt);
>  }
>  
> @@ -170,6 +175,10 @@ static void imx_pd_encoder_mode_set(struct drm_encoder *encoder,
>  
>  static void imx_pd_encoder_disable(struct drm_encoder *encoder)
>  {
> +	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
> +
> +	if (regulator_disable(imxpd->disp_reg))
> +		dev_err(imxpd->dev, "Failed to disable regulator.\n");
>  }
>  
>  static struct drm_connector_funcs imx_pd_connector_funcs = {
> @@ -267,6 +276,10 @@ static int imx_pd_bind(struct device *dev, struct device *master, void *data)
>  	if (ret)
>  		return ret;
>  
> +	imxpd->disp_reg = devm_regulator_get(dev, "display");
> +	if (IS_ERR(imxpd->disp_reg))
> +		return PTR_ERR(imxpd->disp_reg);
> +
>  	dev_set_drvdata(dev, imxpd);
>  
>  	return 0;