From patchwork Fri Nov 25 10:34:32 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: YT Shen X-Patchwork-Id: 9447311 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 934186071C for ; Fri, 25 Nov 2016 10:42:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A22581FFB9 for ; Fri, 25 Nov 2016 10:42:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 96C6F28111; Fri, 25 Nov 2016 10:42:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 160481FFB9 for ; Fri, 25 Nov 2016 10:42:53 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1cADwP-0004lo-RV; Fri, 25 Nov 2016 10:41:13 +0000 Received: from [210.61.82.184] (helo=mailgw02.mediatek.com) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1cADtS-0000pY-5i; Fri, 25 Nov 2016 10:38:21 +0000 Received: from mtkhts09.mediatek.inc [(172.21.101.70)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1624039184; Fri, 25 Nov 2016 18:37:47 +0800 Received: from mtkslt301.mediatek.inc (10.21.14.114) by mtkhts09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.266.1; Fri, 25 Nov 2016 18:37:46 +0800 From: YT Shen To: , Philipp Zabel Subject: [PATCH v10 09/13] drm/mediatek: add mipi_tx data rate check Date: Fri, 25 Nov 2016 18:34:32 +0800 Message-ID: <1480070076-6196-10-git-send-email-yt.shen@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1480070076-6196-1-git-send-email-yt.shen@mediatek.com> References: <1480070076-6196-1-git-send-email-yt.shen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161125_023810_777879_745A539B X-CRM114-Status: GOOD ( 11.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Airlie , Daniel Vetter , Daniel Kurtz , Chris Wilson , Thierry Reding , Boris Brezillon , Jie Qiu , Mao Huang , Bibby Hsieh , YT Shen , yingjoe.chen@mediatek.com, Dan Carpenter , Jitao Shi , CK Hu , linux-mediatek@lists.infradead.org, Matthias Brugger , shaoming chen , linux-arm-kernel@lists.infradead.org, srv_heupstream@mediatek.com, emil.l.velikov@gmail.com, linux-kernel@vger.kernel.org, Sascha Hauer , Maxime Ripard Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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;