From patchwork Fri Feb 24 12:54:48 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Keeping X-Patchwork-Id: 9590219 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 EE67F60471 for ; Fri, 24 Feb 2017 13:11:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B704F2857C for ; Fri, 24 Feb 2017 13:11:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AAB852875B; Fri, 24 Feb 2017 13:11:15 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 544482857C for ; Fri, 24 Feb 2017 13:11:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=VAySL+mC+k3LEtyRyVPJtXREYI54ECpohelW5fBv+BQ=; b=kIrH4zm7W7flZEBXZLMyxUu7X6 C4AnNGTVEiyNBEQCjQU4sF/WyEOE8vrYEvQqmFMAmt/Rbnf/1tutWXFm31ypgfkmUy2CVd8/K4ssL u/KoyASpwXuiHkDTpjbjNRMvufDeU5QPVlbHDEl+gaMteMUcGTjJadbNe51hYN54tuuX3XBY6AVGE WNXamkw1YVJSqrbJ36N2lzEQPolhx5B+lRFsw4qnalkeQRfC39JXZe01BoQTdgtkJ3u7BMens4XaO jNQ/t7GvXGHL3xSLgHiYRbwKvP/ly3rcWtnlo5xqoAP5qcKXvWCk504LdUyBLjacnjWaTz2BCiLT+ aInRNNPg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1chFeQ-0001cM-Ph; Fri, 24 Feb 2017 13:11:10 +0000 Received: from dougal.metanate.com ([90.155.101.14] helo=metanate.com) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1chFPb-0006Qo-Nm; Fri, 24 Feb 2017 12:56:07 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=simple/simple; d=metanate.com; s=stronger; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From; bh=KQ05W/2LXAvCR8WgLcOWBoCHQK2/XdYcfJNKPe87xpw=; b=RGWwDBrRB6qK5ZxaS9+zZaCc6EVt0YHVG2G+GL0ZY7khziCh0gDeJoxFAY+N3pNyVBqse7Wxrob6Kka1QGNqd5YrO7+ubcdU3JoeeS3py0Fy24i8zSLH3NSe8TXd5lVDRgkF7x7MsPjkhfVzd8XSi8NkasAfovEpsPain+PVm7YY7odtfwdCQCuyAEjKIn5DKuK8AMNZtkq9pHpAKIFhU19PvXhdJC+6b5MNxh9ifVnyZgaOwmLHS3Z3OD9wFiJiKo7xSCusty1pBJ1dEU58C0/skOIP1nd5uoeJag1gel6uVh71oHANc/Sh6J+yAi706+Ddqi4oaf8t77yrOH3aQA==; Received: from brian ([192.168.88.1] helo=leela.metanate.com) by shrek.metanate.com with esmtpsa (TLSv1.2:DHE-RSA-AES128-GCM-SHA256:128) (Exim 4.83_RC2) (envelope-from ) id 1chFOz-0006ml-Vs; Fri, 24 Feb 2017 12:55:14 +0000 From: John Keeping To: Mark Yao Subject: [PATCH v4 05/23] drm/rockchip: dw-mipi-dsi: fix generic packet status check Date: Fri, 24 Feb 2017 12:54:48 +0000 Message-Id: <20170224125506.21533-6-john@metanate.com> X-Mailer: git-send-email 2.12.0.rc0.230.gf625d4cdb9.dirty In-Reply-To: <20170224125506.21533-1-john@metanate.com> References: <20170224125506.21533-1-john@metanate.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170224_045552_442769_8B4B28FE X-CRM114-Status: UNSURE ( 7.06 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, Sean Paul , Chris Zhong , John Keeping , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 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 We want to check that both the GEN_CMD_EMPTY and GEN_PLD_W_EMPTY bits are set so we can't just check "val & mask" because that will be true if either bit is set. Signed-off-by: John Keeping Reviewed-by: Chris Zhong Reviewed-by: Sean Paul --- v4: - Add Sean's Reviewed-by v3: - Add Chris' Reviewed-by Unchanged in v2 --- drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c index 4cbbbcb619b7..4be1ff3a42bb 100644 --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c @@ -545,7 +545,7 @@ static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host, static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 hdr_val) { int ret; - u32 val; + u32 val, mask; ret = readx_poll_timeout(readl, dsi->base + DSI_CMD_PKT_STATUS, val, !(val & GEN_CMD_FULL), 1000, @@ -557,8 +557,9 @@ static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 hdr_val) dsi_write(dsi, DSI_GEN_HDR, hdr_val); + mask = GEN_CMD_EMPTY | GEN_PLD_W_EMPTY; ret = readx_poll_timeout(readl, dsi->base + DSI_CMD_PKT_STATUS, - val, val & (GEN_CMD_EMPTY | GEN_PLD_W_EMPTY), + val, (val & mask) == mask, 1000, CMD_PKT_STATUS_TIMEOUT_US); if (ret < 0) { dev_err(dsi->dev, "failed to write command FIFO\n");