On Wed, 31 Aug 2016 11:29:53 +0900 Hyung Jin Jung <realbright at lgcns.com> wrote:
> According to Atmel's guideline... > http://www.at91.com/linux4sam/bin/view/Linux4SAM/UsingAtmelDRMDriver > > the "fbdev emulation mode" could be set from kernel command line (LVDS-1:...) > however, driver register it as DRM_MODE_CONNECTOR_Unknown connector. Just adapt the command line with Unknown-1:... > > Actually we using sama5d3x with LVDS cable so that below patch would be > correct. No it wouldn't. The sama5 SoC is providing a raw RGB interface, so if you really have an LVDS interface on your board this means you have a bridge in the middle. This bridge should be represented in the DT, and attached to a driver in the kernel. > But I don't know the other case such as HDMI, composite... > > Do we need to consider using DT or auto-detection?? > > Signed-off-by: HyungJin Jung <realbright at lgcns.com> > --- > drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c > b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c > index 6119b50..da97efe > --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c > +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c > @@ -208,7 +208,7 @@ static int atmel_hlcdc_attach_endpoint(struct drm_device > *dev, > &atmel_hlcdc_panel_connector_helper_funcs); > ret = drm_connector_init(dev, &output->connector, > &atmel_hlcdc_panel_connector_funcs, > - DRM_MODE_CONNECTOR_Unknown); > + DRM_MODE_CONNECTOR_LVDS); > if (ret) > goto err_encoder_cleanup; >
