Re: [PATCH v2 09/15] drm/mediatek: remove dependency on DRM simple helpers

["CK Hu (胡俊光)" <ck.hu@mediatek.com>]

On Mon, 2026-07-20 at 17:40 +0200, Diogo Silva wrote:
> External email : Please do not click links or open attachments until you have verified the sender or the content.
> 
> 
> The simple KMS helpers are deprecated because they only add an
> intermediate layer between drivers and atomic modesetting.
> 
> Open-code drm_simple_encoder_init() by calling drm_encoder_init()
> directly and providing driver-local drm_encoder_funcs.

Reviewed-by: CK Hu <ck.hu@mediatek.com>

> 
> Signed-off-by: Diogo Silva <diogompaissilva@gmail.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_dsi.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index 3f3f56eed3f9..7cd136bd9605 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -21,12 +21,12 @@
>  #include <drm/drm_atomic_helper.h>
>  #include <drm/drm_bridge.h>
>  #include <drm/drm_bridge_connector.h>
> +#include <drm/drm_encoder.h>
>  #include <drm/drm_mipi_dsi.h>
>  #include <drm/drm_of.h>
>  #include <drm/drm_panel.h>
>  #include <drm/drm_print.h>
>  #include <drm/drm_probe_helper.h>
> -#include <drm/drm_simple_kms_helper.h>
> 
>  #include "mtk_ddp_comp.h"
>  #include "mtk_disp_drv.h"
> @@ -913,12 +913,16 @@ void mtk_dsi_ddp_stop(struct device *dev)
>         mtk_dsi_poweroff(dsi);
>  }
> 
> +static const struct drm_encoder_funcs mtk_dsi_encoder_funcs = {
> +       .destroy = drm_encoder_cleanup,
> +};
> +
>  static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
>  {
>         int ret;
> 
> -       ret = drm_simple_encoder_init(drm, &dsi->encoder,
> -                                     DRM_MODE_ENCODER_DSI);
> +       ret = drm_encoder_init(drm, &dsi->encoder, &mtk_dsi_encoder_funcs,
> +                              DRM_MODE_ENCODER_DSI, NULL);
>         if (ret) {
>                 drm_err(drm, "Failed to encoder init to drm\n");
>                 return ret;
> 
> --
> 2.54.0
> 
>