[PATCH v4 06/13] drm/bridge: lvds-codec: Add "lvds-decoder" support

[Laurent Pinchart]

Hi Fabrizio,

On Wed, Nov 13, 2019 at 03:51:25PM +0000, Fabrizio Castro wrote:
> Add support for transparent LVDS decoders by adding a new
> compatible string ("lvds-decoder") to the driver.
> This patch also adds member connector_type to struct lvds_codec,
> and that's because LVDS decoders have a different connector type
> from LVDS encoders. We fill this new member up with the data
> matching the compatible string.
> 
> Signed-off-by: Fabrizio Castro <fabrizio.castro at bp.renesas.com>
> 
> ---
> v3->v4:
> * New patch
> ---
>  drivers/gpu/drm/bridge/lvds-codec.c | 19 ++++++++++++++++---
>  1 file changed, 16 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/lvds-codec.c b/drivers/gpu/drm/bridge/lvds-codec.c
> index b5801a2..c32e125 100644
> --- a/drivers/gpu/drm/bridge/lvds-codec.c
> +++ b/drivers/gpu/drm/bridge/lvds-codec.c
> @@ -7,6 +7,7 @@
>  #include <linux/gpio/consumer.h>
>  #include <linux/module.h>
>  #include <linux/of.h>
> +#include <linux/of_device.h>
>  #include <linux/of_graph.h>
>  #include <linux/platform_device.h>
>  
> @@ -17,6 +18,7 @@ struct lvds_codec {
>  	struct drm_bridge bridge;
>  	struct drm_bridge *panel_bridge;
>  	struct gpio_desc *powerdown_gpio;
> +	u32 connector_type;
>  };
>  
>  static int lvds_codec_attach(struct drm_bridge *bridge)
> @@ -65,6 +67,7 @@ static int lvds_codec_probe(struct platform_device *pdev)
>  	if (!lvds_codec)
>  		return -ENOMEM;
>  
> +	lvds_codec->connector_type = (u32)of_device_get_match_data(&pdev->dev);

I'm now getting a compilation failure here:

drivers/gpu/drm/bridge/lvds-codec.c: In function ‘lvds_codec_probe’:
drivers/gpu/drm/bridge/lvds-codec.c:68:31: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
  lvds_codec->connector_type = (u32)of_device_get_match_data(&pdev->dev);
                               ^

The fix should be simple:

	lvds_codec->connector_type = (uintptr_t)of_device_get_match_data(dev);

I'm bothered by the fact that I've compiled this before without any
issue, so this really puzzles me. Do you get the same warning ?

>  	lvds_codec->powerdown_gpio = devm_gpiod_get_optional(dev, "powerdown",
>  							     GPIOD_OUT_HIGH);
>  	if (IS_ERR(lvds_codec->powerdown_gpio)) {
> @@ -105,7 +108,7 @@ static int lvds_codec_probe(struct platform_device *pdev)
>  
>  	lvds_codec->panel_bridge =
>  		devm_drm_panel_bridge_add_typed(dev, panel,
> -						DRM_MODE_CONNECTOR_LVDS);
> +						lvds_codec->connector_type);
>  	if (IS_ERR(lvds_codec->panel_bridge))
>  		return PTR_ERR(lvds_codec->panel_bridge);
>  
> @@ -133,8 +136,18 @@ static int lvds_codec_remove(struct platform_device *pdev)
>  }
>  
>  static const struct of_device_id lvds_codec_match[] = {
> -	{ .compatible = "lvds-encoder" },
> -	{ .compatible = "thine,thc63lvdm83d" },
> +	{
> +		.compatible = "lvds-decoder",
> +		.data = (void *)DRM_MODE_CONNECTOR_DPI,
> +	},
> +	{
> +		.compatible = "lvds-encoder",
> +		.data = (void *)DRM_MODE_CONNECTOR_LVDS,
> +	},
> +	{
> +		.compatible = "thine,thc63lvdm83d",
> +		.data = (void *)DRM_MODE_CONNECTOR_LVDS,
> +	},
>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, lvds_codec_match);

-- 
Regards,

Laurent Pinchart