linux-kernel - Re: [PATCH] drm/gma500: remove helper function

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Date:	Sat, 6 Feb 2016 18:09:13 +0100
From:	Patrik Jakobsson <patrik.r.jakobsson@...il.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	David Airlie <airlied@...ux.ie>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	dri-devel <dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH] drm/gma500: remove helper function

On Tue, Feb 2, 2016 at 7:05 AM, Sudip Mukherjee
<sudipm.mukherjee@...il.com> wrote:
> We were getting build warning about:
> drivers/gpu/drm/gma500/mdfld_dsi_output.c:407:2: warning: initialization
>         from incompatible pointer type
>
> The callback to dpms was pointing to a helper function which had a
> return type of void, whereas the callback should point to a function
> which has a return type of int.
> On closer look it turned out that we do not need the helper function
> since if we call drm_helper_connector_dpms() directly, the first check
> that drm_helper_connector_dpms() does is: if (mode == connector->dpms)
>
> Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>

Looks good, thanks.

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@...il.com>

> ---
>  drivers/gpu/drm/gma500/mdfld_dsi_output.c | 12 +-----------
>  1 file changed, 1 insertion(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/gma500/mdfld_dsi_output.c b/drivers/gpu/drm/gma500/mdfld_dsi_output.c
> index d758f4c..907cb51 100644
> --- a/drivers/gpu/drm/gma500/mdfld_dsi_output.c
> +++ b/drivers/gpu/drm/gma500/mdfld_dsi_output.c
> @@ -382,16 +382,6 @@ static int mdfld_dsi_connector_mode_valid(struct drm_connector *connector,
>         return MODE_OK;
>  }
>
> -static void mdfld_dsi_connector_dpms(struct drm_connector *connector, int mode)
> -{
> -       if (mode == connector->dpms)
> -               return;
> -
> -       /*first, execute dpms*/
> -
> -       drm_helper_connector_dpms(connector, mode);
> -}
> -
>  static struct drm_encoder *mdfld_dsi_connector_best_encoder(
>                                 struct drm_connector *connector)
>  {
> @@ -404,7 +394,7 @@ static struct drm_encoder *mdfld_dsi_connector_best_encoder(
>
>  /*DSI connector funcs*/
>  static const struct drm_connector_funcs mdfld_dsi_connector_funcs = {
> -       .dpms = /*drm_helper_connector_dpms*/mdfld_dsi_connector_dpms,
> +       .dpms = drm_helper_connector_dpms,
>         .detect = mdfld_dsi_connector_detect,
>         .fill_modes = drm_helper_probe_single_connector_modes,
>         .set_property = mdfld_dsi_connector_set_property,
> --
> 1.9.1
>