[PATCH v2 2/3] drm/bridge: lvds-codec: Add support for regulator

[Biju Das]

Hi Laurent,

Thanks for the feedback.

> Subject: Re: [PATCH v2 2/3] drm/bridge: lvds-codec: Add support for
> regulator
>
> Hi Biju,
>
> Thank you for the patch.
>
> On Mon, Aug 10, 2020 at 04:22:18PM +0100, Biju Das wrote:
> > Add the support for enabling optional regulator that may be used as
> > VCC source.
> >
> > Signed-off-by: Biju Das <biju.das.jz at bp.renesas.com>
> > ---
> > New Patch Ref: Ref:https://patchwork.kernel.org/patch/11705819/
> > ---
> >  drivers/gpu/drm/bridge/lvds-codec.c | 29
> > +++++++++++++++++++++++++++++
> >  1 file changed, 29 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/bridge/lvds-codec.c
> > b/drivers/gpu/drm/bridge/lvds-codec.c
> > index 24fb1befdfa2..5858a29aafe6 100644
> > --- a/drivers/gpu/drm/bridge/lvds-codec.c
> > +++ b/drivers/gpu/drm/bridge/lvds-codec.c
> > @@ -10,13 +10,16 @@
> >  #include <linux/of_device.h>
> >  #include <linux/of_graph.h>
> >  #include <linux/platform_device.h>
> > +#include <linux/regulator/consumer.h>
> >
> >  #include <drm/drm_bridge.h>
> >  #include <drm/drm_panel.h>
> >
> >  struct lvds_codec {
> > +struct device *dev;
> >  struct drm_bridge bridge;
> >  struct drm_bridge *panel_bridge;
> > +struct regulator *vcc;
> >  struct gpio_desc *powerdown_gpio;
> >  u32 connector_type;
> >  };
> > @@ -38,6 +41,14 @@ static int lvds_codec_attach(struct drm_bridge
> > *bridge,  static void lvds_codec_enable(struct drm_bridge *bridge)  {
> >  struct lvds_codec *lvds_codec = to_lvds_codec(bridge);
> > +int ret;
> > +
> > +ret = regulator_enable(lvds_codec->vcc);
> > +if (ret) {
> > +dev_err(lvds_codec->dev,
> > +"Failed to enable regulator \"vcc\": %d\n", ret);
> > +return;
> > +}
> >
> >  if (lvds_codec->powerdown_gpio)
> >  gpiod_set_value_cansleep(lvds_codec->powerdown_gpio,
> 0); @@ -46,9
> > +57,15 @@ static void lvds_codec_enable(struct drm_bridge *bridge)
> > static void lvds_codec_disable(struct drm_bridge *bridge)  {
> >  struct lvds_codec *lvds_codec = to_lvds_codec(bridge);
> > +int ret;
> >
> >  if (lvds_codec->powerdown_gpio)
> >  gpiod_set_value_cansleep(lvds_codec->powerdown_gpio,
> 1);
> > +
> > +ret = regulator_disable(lvds_codec->vcc);
> > +if (ret)
> > +dev_err(lvds_codec->dev,
> > +"Failed to disable regulator \"vcc\": %d\n", ret);
> >  }
> >
> >  static const struct drm_bridge_funcs funcs = { @@ -63,12 +80,24 @@
> > static int lvds_codec_probe(struct platform_device *pdev)
> >  struct device_node *panel_node;
> >  struct drm_panel *panel;
> >  struct lvds_codec *lvds_codec;
> > +int error;
>
> The driver tends to use "ret" for error status variables. If you're fine with this
> change there's no need to resubmit the patch, I can fix when applying.

Yes, I am ok with that.

Cheers,
Biju


> Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
>


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