From mboxrd@z Thu Jan 1 00:00:00 1970 From: yt.shen@mediatek.com (YT Shen) Date: Fri, 25 Nov 2016 18:34:32 +0800 Subject: [PATCH v10 09/13] drm/mediatek: add mipi_tx data rate check In-Reply-To: <1480070076-6196-1-git-send-email-yt.shen@mediatek.com> References: <1480070076-6196-1-git-send-email-yt.shen@mediatek.com> Message-ID: <1480070076-6196-10-git-send-email-yt.shen@mediatek.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org modify data rate limitation (>lGbps/lane) for mipitx Signed-off-by: shaoming chen Signed-off-by: YT Shen --- 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; -- 1.9.1