From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E37C9C433FF for ; Wed, 14 Aug 2019 10:51:14 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 68B2C2063F for ; Wed, 14 Aug 2019 10:51:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="D0IIQK02" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 68B2C2063F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nxp.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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=kFnycmUu16Gl88fbLCbBMqby6C0aThF5vFyJKIvKl8U=; b=D0IIQK02ji2SkIQeRWzFJyDRGO M/U2Ffvgu5foTc9y/YZSANOgG5v5m+eDMQ6KyjACe/sj0cwmE2bpf/IEKAYTROQ9Wk/ii0oL39VHW b0aXb9mpwURYNDsYUeQ8JaM8a0F/SDpVheXA5srzAE3FHOhdErRpVNd4nMRft+2Qnqf2SrzwIqkpA jTsvpi5HRzc7PnijUrSagYNj4Ct1sU8YJiu2MLAE0KukOef2L8bJ446AdD7Tf+otjJ2F1F//875p9 5Vf8TkXaNOIFJstqB08OjcVDn32wo6CdDx+yugVYbCbr1KmpFoS1Jvhf6/mnW9hXawzgs6/FRNcIp 0dKeHwQQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hxqs4-0007aS-LT; Wed, 14 Aug 2019 10:51:12 +0000 Received: from inva020.nxp.com ([92.121.34.13]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hxqq5-0003rf-Gf for linux-arm-kernel@lists.infradead.org; Wed, 14 Aug 2019 10:49:11 +0000 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 4AE281A039B; Wed, 14 Aug 2019 12:49:08 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 3E6821A039F; Wed, 14 Aug 2019 12:49:08 +0200 (CEST) Received: from fsr-ub1664-120.ea.freescale.net (fsr-ub1664-120.ea.freescale.net [10.171.82.81]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id 33F602060E; Wed, 14 Aug 2019 12:49:07 +0200 (CEST) From: Robert Chiras To: =?UTF-8?q?Guido=20G=C3=BCnther?= , Marek Vasut , Stefan Agner , David Airlie , Daniel Vetter , Rob Herring , Mark Rutland , Shawn Guo , Sascha Hauer , Fabio Estevam Subject: [PATCH v2 11/15] drm/mxsfb: Update mxsfb to support LCD reset Date: Wed, 14 Aug 2019 13:48:47 +0300 Message-Id: <1565779731-1300-12-git-send-email-robert.chiras@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1565779731-1300-1-git-send-email-robert.chiras@nxp.com> References: <1565779731-1300-1-git-send-email-robert.chiras@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190814_034909_724858_AB860DD3 X-CRM114-Status: GOOD ( 11.42 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, NXP Linux Team , Pengutronix Kernel Team , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org The eLCDIF controller has control pin for the external LCD reset pin. Add support for it and assert this pin in enable and de-assert it in disable. Signed-off-by: Robert Chiras --- drivers/gpu/drm/mxsfb/mxsfb_crtc.c | 14 ++++++++++---- drivers/gpu/drm/mxsfb/mxsfb_regs.h | 2 ++ 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/mxsfb/mxsfb_crtc.c b/drivers/gpu/drm/mxsfb/mxsfb_crtc.c index 1be29f5..a4ba368 100644 --- a/drivers/gpu/drm/mxsfb/mxsfb_crtc.c +++ b/drivers/gpu/drm/mxsfb/mxsfb_crtc.c @@ -224,9 +224,12 @@ static void mxsfb_enable_controller(struct mxsfb_drm_private *mxsfb) clk_prepare_enable(mxsfb->clk_disp_axi); clk_prepare_enable(mxsfb->clk); - if (mxsfb->devdata->ipversion >= 4) + if (mxsfb->devdata->ipversion >= 4) { writel(CTRL2_OUTSTANDING_REQS(REQ_16), mxsfb->base + LCDC_V4_CTRL2 + REG_SET); + /* Assert LCD Reset bit */ + writel(CTRL2_LCD_RESET, mxsfb->base + LCDC_V4_CTRL2 + REG_SET); + } /* If it was disabled, re-enable the mode again */ writel(CTRL_DOTCLK_MODE, mxsfb->base + LCDC_CTRL + REG_SET); @@ -244,11 +247,14 @@ static void mxsfb_disable_controller(struct mxsfb_drm_private *mxsfb) { u32 reg; - if (mxsfb->devdata->ipversion >= 4) + writel(CTRL_RUN, mxsfb->base + LCDC_CTRL + REG_CLR); + + if (mxsfb->devdata->ipversion >= 4) { writel(CTRL2_OUTSTANDING_REQS(0x7), mxsfb->base + LCDC_V4_CTRL2 + REG_CLR); - - writel(CTRL_RUN, mxsfb->base + LCDC_CTRL + REG_CLR); + /* De-assert LCD Reset bit */ + writel(CTRL2_LCD_RESET, mxsfb->base + LCDC_V4_CTRL2 + REG_CLR); + } /* * Even if we disable the controller here, it will still continue diff --git a/drivers/gpu/drm/mxsfb/mxsfb_regs.h b/drivers/gpu/drm/mxsfb/mxsfb_regs.h index dc4daa0..0f63ba1 100644 --- a/drivers/gpu/drm/mxsfb/mxsfb_regs.h +++ b/drivers/gpu/drm/mxsfb/mxsfb_regs.h @@ -108,6 +108,8 @@ #define CTRL2_LINE_PATTERN_BGR 5 #define CTRL2_LINE_PATTERN_CLR 7 +#define CTRL2_LCD_RESET BIT(0) + #define TRANSFER_COUNT_SET_VCOUNT(x) REG_PUT((x), 31, 16) #define TRANSFER_COUNT_GET_VCOUNT(x) REG_GET((x), 31, 16) #define TRANSFER_COUNT_SET_HCOUNT(x) REG_PUT((x), 15, 0) -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel