On Thu, 2020-12-10 at 23:50 +0800, Chun-Kuang Hu wrote: > Hi, Yongqiang: > > Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx> 於 2020年12月10日 週四 下午5:08寫道： > > > > This patch add RDMA fifo size error handle > > rdma fifo size will not always bigger than the calculated threshold > > if that case happened, we need set fifo size as the threshold > > > > Signed-off-by: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx> > > --- > > drivers/gpu/drm/mediatek/mtk_disp_rdma.c | 4 ++++ > > 1 file changed, 4 insertions(+) > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c > > index 794acc5..0508392 100644 > > --- a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c > > +++ b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c > > @@ -151,6 +151,10 @@ static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width, > > * account for blanking, and with a pixel depth of 4 bytes: > > */ > > threshold = width * height * vrefresh * 4 * 7 / 1000000; > > + > > + if (threshold > rdma_fifo_size) > > + threshold = rdma_fifo_size; > > If the formula is not correct, you should fix the formula not work around. > > Regards, > Chun-Kuang. how about this: threshold = max(width * height * vrefresh * 4 * 7 / 1000000, rdma_fifo_size); > > > + > > reg = RDMA_FIFO_UNDERFLOW_EN | > > RDMA_FIFO_PSEUDO_SIZE(rdma_fifo_size) | > > RDMA_OUTPUT_VALID_FIFO_THRESHOLD(threshold); > > -- > > 1.8.1.1.dirty > > _______________________________________________ > > Linux-mediatek mailing list > > Linux-mediatek@xxxxxxxxxxxxxxxxxxx > > http://lists.infradead.org/mailman/listinfo/linux-mediatek _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
