[PATCH v11 3/9] drm/mediatek: add RDMA fifo size error handle
From: Hsin-Yi Wang <hidden>
Date: 2021-01-28 07:34:17
Also in:
dri-devel, linux-arm-kernel, linux-mediatek, lkml
Subsystem:
drm drivers, drm drivers for mediatek, the rest · Maintainers:
David Airlie, Simona Vetter, Chun-Kuang Hu, Philipp Zabel, Linus Torvalds
From: Yongqiang Niu <redacted> 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 <redacted> Signed-off-by: Hsin-Yi Wang <redacted> --- 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 b84004394970f..04b9542010b00 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c@@ -168,6 +168,10 @@ void mtk_rdma_config(struct device *dev, 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; + reg = RDMA_FIFO_UNDERFLOW_EN | RDMA_FIFO_PSEUDO_SIZE(rdma_fifo_size) | RDMA_OUTPUT_VALID_FIFO_THRESHOLD(threshold);
--
2.30.0.280.ga3ce27912f-goog