On Thursday, December 05, 2013 at 07:28:09 PM, Denis Carikli wrote:
> Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Cc: Rob Herring <rob.herring@xxxxxxxxxxx>
> Cc: Pawel Moll <pawel.moll@xxxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: Stephen Warren <swarren@xxxxxxxxxxxxx>
> Cc: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: driverdev-devel@xxxxxxxxxxxxxxxxxxxxxx
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: Sascha Hauer <kernel@xxxxxxxxxxxxxx>
> Cc: Shawn Guo <shawn.guo@xxxxxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: Eric Bénard <eric@xxxxxxxxxx>
> Signed-off-by: Denis Carikli <denis@xxxxxxxxxx>
> ---
> ChangeLog v3->v5:
> - Code clenaup.
>
> ChangeLog v2->v3:
> - Added some interested people in the Cc list.
> - the lcd-supply is now called display-supply (not all display are LCD).
> - The code and documentation was updated accordingly.
> - regulator_is_enabled now guard the regulator enables/disables because
> regulator_disable does not check the regulator state.
> ---
> .../bindings/staging/imx-drm/fsl-imx-drm.txt | 1 +
> drivers/staging/imx-drm/parallel-display.c | 22
> ++++++++++++++++++++ 2 files changed, 23 insertions(+)
>
> 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.
> - 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 65d0c18..61c0aeb 100644
> --- a/drivers/staging/imx-drm/parallel-display.c
> +++ b/drivers/staging/imx-drm/parallel-display.c
> @@ -22,6 +22,7 @@
> #include <drm/drmP.h>
> #include <drm/drm_fb_helper.h>
> #include <drm/drm_crtc_helper.h>
> +#include <linux/regulator/consumer.h>
> #include <linux/videodev2.h>
>
> #include "imx-drm.h"
> @@ -35,6 +36,7 @@ struct imx_parallel_display {
> struct drm_encoder encoder;
> struct imx_drm_encoder *imx_drm_encoder;
> struct device *dev;
> + struct regulator *disp_reg;
> void *edid;
> int edid_len;
> u32 interface_pix_fmt;
> @@ -141,6 +143,13 @@ static void imx_pd_encoder_prepare(struct drm_encoder
> *encoder) {
> struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
>
> + if (!IS_ERR(imxpd->disp_reg) &&
> + !regulator_is_enabled(imxpd->disp_reg)) {
> + if (regulator_enable(imxpd->disp_reg))
> + dev_err(imxpd->dev,
> + "Failed to enable regulator.\n");
I wonder, is this linebreak needed for this function call ?
[...]
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