From patchwork Fri Mar 31 11:30:35 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: YT Shen X-Patchwork-Id: 9656043 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 48543601D2 for ; Fri, 31 Mar 2017 11:37:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 36A4224DA2 for ; Fri, 31 Mar 2017 11:37:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2844A26E39; Fri, 31 Mar 2017 11:37:00 +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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C2DFE24DA2 for ; Fri, 31 Mar 2017 11:36:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0BE5F6EAA7; Fri, 31 Mar 2017 11:36:59 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mailgw01.mediatek.com (unknown [210.61.82.183]) by gabe.freedesktop.org (Postfix) with ESMTPS id 489C76EAA7 for ; Fri, 31 Mar 2017 11:36:57 +0000 (UTC) Received: from mtkhts07.mediatek.inc [(172.21.101.69)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1926442158; Fri, 31 Mar 2017 19:31:50 +0800 Received: from mtkslt301.mediatek.inc (10.21.14.114) by mtkhts07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.266.1; Fri, 31 Mar 2017 19:31:48 +0800 From: YT Shen To: CK Hu , Philipp Zabel Subject: [PATCH v13 08/12] drm/mediatek: add dsi interrupt control Date: Fri, 31 Mar 2017 19:30:35 +0800 Message-ID: <1490959839-39816-9-git-send-email-yt.shen@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1490959839-39816-1-git-send-email-yt.shen@mediatek.com> References: <1490959839-39816-1-git-send-email-yt.shen@mediatek.com> MIME-Version: 1.0 X-MTK: N Cc: Mark Rutland , devicetree@vger.kernel.org, srv_heupstream@mediatek.com, emil.l.velikov@gmail.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Rob Herring , linux-mediatek@lists.infradead.org, Matthias Brugger , yingjoe.chen@mediatek.com, shaoming chen , linux-arm-kernel@lists.infradead.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: shaoming chen add dsi interrupt control Signed-off-by: shaoming chen Acked-by: CK Hu --- drivers/gpu/drm/mediatek/mtk_dsi.c | 92 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index 5d66b98..57955636 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -29,6 +30,16 @@ #define DSI_START 0x00 +#define DSI_INTEN 0x08 + +#define DSI_INTSTA 0x0c +#define LPRX_RD_RDY_INT_FLAG BIT(0) +#define CMD_DONE_INT_FLAG BIT(1) +#define TE_RDY_INT_FLAG BIT(2) +#define VM_DONE_INT_FLAG BIT(3) +#define EXT_TE_RDY_INT_FLAG BIT(4) +#define DSI_BUSY BIT(31) + #define DSI_CON_CTRL 0x10 #define DSI_RESET BIT(0) #define DSI_EN BIT(1) @@ -71,6 +82,9 @@ #define DSI_HSTX_CKL_WC 0x64 +#define DSI_RACK 0x84 +#define RACK BIT(0) + #define DSI_PHY_LCCON 0x104 #define LC_HS_TX_EN BIT(0) #define LC_ULPM_EN BIT(1) @@ -137,6 +151,8 @@ struct mtk_dsi { struct videomode vm; int refcount; bool enabled; + u32 irq_data; + wait_queue_head_t irq_wait_queue; }; static inline struct mtk_dsi *encoder_to_dsi(struct drm_encoder *e) @@ -469,6 +485,64 @@ static void mtk_dsi_start(struct mtk_dsi *dsi) writel(1, dsi->regs + DSI_START); } +static void mtk_dsi_set_interrupt_enable(struct mtk_dsi *dsi) +{ + u32 inten = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG; + + writel(inten, dsi->regs + DSI_INTEN); +} + +static void mtk_dsi_irq_data_set(struct mtk_dsi *dsi, u32 irq_bit) +{ + dsi->irq_data |= irq_bit; +} + +static __maybe_unused void mtk_dsi_irq_data_clear(struct mtk_dsi *dsi, u32 irq_bit) +{ + dsi->irq_data &= ~irq_bit; +} + +static __maybe_unused s32 mtk_dsi_wait_for_irq_done(struct mtk_dsi *dsi, u32 irq_flag, + unsigned int timeout) +{ + s32 ret = 0; + unsigned long jiffies = msecs_to_jiffies(timeout); + + ret = wait_event_interruptible_timeout(dsi->irq_wait_queue, + dsi->irq_data & irq_flag, + jiffies); + if (ret == 0) { + DRM_WARN("Wait DSI IRQ(0x%08x) Timeout\n", irq_flag); + + mtk_dsi_enable(dsi); + mtk_dsi_reset_engine(dsi); + } + + return ret; +} + +static irqreturn_t mtk_dsi_irq(int irq, void *dev_id) +{ + struct mtk_dsi *dsi = dev_id; + u32 status, tmp; + u32 flag = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG; + + status = readl(dsi->regs + DSI_INTSTA) & flag; + + if (status) { + do { + mtk_dsi_mask(dsi, DSI_RACK, RACK, RACK); + tmp = readl(dsi->regs + DSI_INTSTA); + } while (tmp & DSI_BUSY); + + mtk_dsi_mask(dsi, DSI_INTSTA, status, 0); + mtk_dsi_irq_data_set(dsi, status); + wake_up_interruptible(&dsi->irq_wait_queue); + } + + return IRQ_HANDLED; +} + static void mtk_dsi_poweroff(struct mtk_dsi *dsi) { if (WARN_ON(dsi->refcount == 0)) @@ -517,6 +591,7 @@ static void mtk_output_dsi_enable(struct mtk_dsi *dsi) mtk_dsi_ps_control_vact(dsi); mtk_dsi_config_vdo_timing(dsi); + mtk_dsi_set_interrupt_enable(dsi); mtk_dsi_set_mode(dsi); mtk_dsi_clk_hs_mode(dsi, 1); @@ -800,6 +875,7 @@ static int mtk_dsi_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *remote_node, *endpoint; struct resource *regs; + int irq_num; int comp_id; int ret; @@ -876,6 +952,22 @@ static int mtk_dsi_probe(struct platform_device *pdev) return ret; } + irq_num = platform_get_irq(pdev, 0); + if (irq_num < 0) { + dev_err(&pdev->dev, "failed to request dsi irq resource\n"); + return -EPROBE_DEFER; + } + + irq_set_status_flags(irq_num, IRQ_TYPE_LEVEL_LOW); + ret = devm_request_irq(&pdev->dev, irq_num, mtk_dsi_irq, + IRQF_TRIGGER_LOW, dev_name(&pdev->dev), dsi); + if (ret) { + dev_err(&pdev->dev, "failed to request mediatek dsi irq\n"); + return -EPROBE_DEFER; + } + + init_waitqueue_head(&dsi->irq_wait_queue); + platform_set_drvdata(pdev, dsi); return component_add(&pdev->dev, &mtk_dsi_component_ops);