Hi Daniel,

A patch to fix this is already merged into drm-misc:

commit db9b60400f9253c25ae639797df2d0ff7a35d9d8 Author: Sudip Mukherjee sudipm.mukherjee@gmail.com Date: Tue Feb 2 11:35:55 2016 +0530

drm/gma500: remove helper function

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@vectorindia.org Link: http://patchwork.freedesktop.org/patch/msgid/1454393155-13142-1-git-send-ema... Acked-by: Patrik Jakobsson patrik.r.jakobsson@gmail.com Signed-off-by: Daniel Vetter daniel.vetter@intel.com

Thanks Patrik

On Thu, Feb 18, 2016 at 3:58 PM, Daniel Wagner daniel.wagner@bmw-carit.de wrote:

9a69a9ac20f7 ("drm: Make the connector dpms callback return a value, v2.") wants mdfld_dsi_connector_dpms to return a value.

This fixes also a new gcc 5.2 warning:

drivers/gpu/drm/gma500/mdfld_dsi_output.c:407:39: warning: initialization from incompatible pointer type [-Werror=incompatible-pointer-types] .dpms = /*drm_helper_connector_dpms*/mdfld_dsi_connector_dpms, ^ Signed-off-by: Daniel Wagner daniel.wagner@bmw-carit.de

---

drivers/gpu/drm/gma500/mdfld_dsi_output.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/gma500/mdfld_dsi_output.c b/drivers/gpu/drm/gma500/mdfld_dsi_output.c index d758f4c..407b9bb 100644 --- a/drivers/gpu/drm/gma500/mdfld_dsi_output.c +++ b/drivers/gpu/drm/gma500/mdfld_dsi_output.c @@ -382,14 +382,14 @@ 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) +static int mdfld_dsi_connector_dpms(struct drm_connector *connector, int mode) { if (mode == connector->dpms)

•           return;
  

•           return 0;
  
    /*first, execute dpms*/
  
  

•   drm_helper_connector_dpms(connector, mode);
  

•   return drm_helper_connector_dpms(connector, mode);
  

}

static struct drm_encoder *mdfld_dsi_connector_best_encoder( @@ -404,7 +404,7 @@ 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 = mdfld_dsi_connector_dpms,
    .detect = mdfld_dsi_connector_detect,
    .fill_modes = drm_helper_probe_single_connector_modes,
    .set_property = mdfld_dsi_connector_set_property,
  

-- 2.5.0