Hi, CK: I've some idea as below. On Fri, 2018-05-25 at 13:00 +0800, CK Hu wrote: > Hi, Stu: > > On Fri, 2018-05-25 at 10:34 +0800, stu.hsieh@xxxxxxxxxxxx wrote: > > From: Stu Hsieh <stu.hsieh@xxxxxxxxxxxx> > > > > This patch create third crtc by third ddp path > > > > Apply this patch before the patch 'Add support for mediatek SOC MT2712' > because this patch is necessary for mt2712. > > > Signed-off-by: Stu Hsieh <stu.hsieh@xxxxxxxxxxxx> > > --- > > drivers/gpu/drm/mediatek/mtk_drm_drv.c | 5 +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c > > index b32c4cc8d051..3a866e1d6af4 100644 > > --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c > > +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c > > @@ -267,6 +267,11 @@ static int mtk_drm_kms_init(struct drm_device *drm) > > if (ret < 0) > > goto err_component_unbind; > > > > + ret = mtk_drm_crtc_create(drm, private->data->third_path, > > + private->data->third_len); > > I think you should prevent doing this for mt8173 and mt2701 because that > two SoC has only two ddp path. Now, 8173 and 2701 have only two ddp path, there is a problem on run time. There are three crtc for drm resource, and there is nothing in third crtc. Because 8173 and 2701 have no third ddp, and the third ddp_len is zero. So, I want to add the condition like following in mtk_crtc_create() if (path_len == 0) return 0; Then, the valur ret is zero and it would not create the null third crtc. Regards, Stu > > Regards, > CK > > > + if (ret < 0) > > + goto err_component_unbind; > > + > > /* Use OVL device for all DMA memory allocations */ > > np = private->comp_node[private->data->main_path[0]] ?: > > private->comp_node[private->data->ext_path[0]]; > > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
