imx-drm: parallel-display: Fix DPMS default state.

If connector->dpms is left untouched, it defaults
to DRM_MODE_DPMS_ON (0).

As a result, drm_helper_connector_dpms will exit when
it will be asked to set the state to DRM_MODE_DPMS_ON,
because it is already set.

That issue prevented displays from turning on at boot.

Signed-off-by: Denis Carikli <denis@eukrea.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/imx-drm/parallel-display.c b/drivers/staging/imx-drm/parallel-display.c
index b567832..4ca61af 100644 (file)
--- a/drivers/staging/imx-drm/parallel-display.c
+++ b/drivers/staging/imx-drm/parallel-display.c
@@ -173,6 +173,13 @@ static int imx_pd_register(struct drm_device *drm,
        if (ret)
                return ret;
 
+       /* set the connector's dpms to OFF so that
+        * drm_helper_connector_dpms() won't return
+        * immediately since the current state is ON
+        * at this point.
+        */
+       imxpd->connector.dpms = DRM_MODE_DPMS_OFF;
+
        drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs);
        drm_encoder_init(drm, &imxpd->encoder, &imx_pd_encoder_funcs,
                         DRM_MODE_ENCODER_NONE);