Re: [RESEND PATCH 3/3] drm/mediatek: mtk_dpi: Use simple encoder

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On Mon, 18 May 2020 19:39:09 +0200
Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> wrote:

> The mtk_dpi driver uses an empty implementation for its encoder. Replace
> the code with the generic simple encoder.
> 
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
> Reviewed-by: Chun-Kuang Hu <chunkuang.hu@xxxxxxxxxx>
> ---
> 
>  drivers/gpu/drm/mediatek/mtk_dpi.c | 14 +++-----------
>  1 file changed, 3 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index baad198c69eb..80778b2aac2a 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -20,6 +20,7 @@
>  #include <drm/drm_bridge.h>
>  #include <drm/drm_crtc.h>
>  #include <drm/drm_of.h>
> +#include <drm/drm_simple_kms_helper.h>
>  
>  #include "mtk_dpi_regs.h"
>  #include "mtk_drm_ddp_comp.h"
> @@ -510,15 +511,6 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
>  	return 0;
>  }
>  
> -static void mtk_dpi_encoder_destroy(struct drm_encoder *encoder)
> -{
> -	drm_encoder_cleanup(encoder);
> -}
> -
> -static const struct drm_encoder_funcs mtk_dpi_encoder_funcs = {
> -	.destroy = mtk_dpi_encoder_destroy,
> -};
> -
>  static int mtk_dpi_bridge_attach(struct drm_bridge *bridge,
>  				 enum drm_bridge_attach_flags flags)
>  {
> @@ -591,8 +583,8 @@ static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
>  		return ret;
>  	}
>  
> -	ret = drm_encoder_init(drm_dev, &dpi->encoder, &mtk_dpi_encoder_funcs,
> -			       DRM_MODE_ENCODER_TMDS, NULL);
> +	ret = drm_simple_encoder_init(drm_dev, &dpi->encoder,
> +				      DRM_MODE_ENCODER_TMDS);

Not related to this change, but shouldn't we have DRM_MODE_ENCODER_DPI
here?

>  	if (ret) {
>  		dev_err(dev, "Failed to initialize decoder: %d\n", ret);
>  		goto err_unregister;

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