[PATCH v10 09/13] drm/mediatek: add mipi_tx data rate check
From: CK Hu <hidden>
Date: 2016-11-30 11:05:25
Also in:
dri-devel, linux-mediatek, lkml
Hi, YT: On Fri, 2016-11-25 at 18:34 +0800, YT Shen wrote:
modify data rate limitation (>lGbps/lane) for mipitx
I think MT2701 DRM can work correctly without this patch. Why do you put this patch in MT2701 series? Maybe you can send this patch independently. Regards, CK
quoted hunk ↗ jump to hunk
Signed-off-by: shaoming chen <redacted> Signed-off-by: YT Shen <redacted> --- drivers/gpu/drm/mediatek/mtk_mipi_tx.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)diff --git a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c index fd84914..1ef00ac 100644 --- a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c +++ b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c@@ -177,7 +177,9 @@ static int mtk_mipi_tx_pll_prepare(struct clk_hw *hw) dev_dbg(mipi_tx->dev, "prepare: %u Hz\n", mipi_tx->data_rate); - if (mipi_tx->data_rate >= 500000000) { + if (mipi_tx->data_rate > 1250000000) { + return -EINVAL; + } else if (mipi_tx->data_rate >= 500000000) { txdiv = 1; txdiv0 = 0; txdiv1 = 0;