From patchwork Wed Feb 8 02:25:22 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Zhong X-Patchwork-Id: 9561677 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 B033360236 for ; Wed, 8 Feb 2017 02:30:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A2C9B28438 for ; Wed, 8 Feb 2017 02:30:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 97A4528484; Wed, 8 Feb 2017 02:30:48 +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=-1.4 required=2.0 tests=BAYES_00, RCVD_IN_SORBS_SPAM autolearn=no 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 58A7928438 for ; Wed, 8 Feb 2017 02:30:48 +0000 (UTC) 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 1cbI1v-0006Ql-Qb; Wed, 08 Feb 2017 02:30:47 +0000 Received: from mail-pf0-f194.google.com ([209.85.192.194]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cbHxU-0002nM-Bt; Wed, 08 Feb 2017 02:26:16 +0000 Received: by mail-pf0-f194.google.com with SMTP id y143so10486316pfb.1; Tue, 07 Feb 2017 18:25:55 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=FpLZxjB4BIOBScdHxIKntiyidFCD24dRqBXOw41MB/U=; b=ooDE2UGXNXDNGh8U52YldPJQ0wsIV83IBjmS1YN+JkHxFa749xM+LpXZ9ztDg604hV QucvB8F1dFZylfNgICv8bsT08RV2gwRKtWX4nC0uK9p6Mimg1TK1ZWOPNUWKj1lXFxUn zIHEb/r5eZQ8wR75jUWz1tlufaNFBrT+YZMFzwtj8vQpwgMx7JS69I9mXz0OLA+hLzII gLDaWgzZZrCSaqSqWDAW0N6zVQkGgPSMoAT1C9XeCrN380HaNoyGsglnsDumePtzTJf3 7KMhkOuJtuYLPi6Wv1cy3YGVo50AuPcyDYK31wZNdYXDWGS33j1w3veCAmYm0+gPpwX8 mn8w== X-Gm-Message-State: AIkVDXL38CKU4oGV+R4/5BAE1xhx9oC4suScWHRFj4XySvYDSIbvOsdtnfIIIkhDkLWL3Q== X-Received: by 10.99.60.76 with SMTP id i12mr23729507pgn.170.1486520754697; Tue, 07 Feb 2017 18:25:54 -0800 (PST) Received: from localhost.localdomain ([103.29.142.67]) by smtp.gmail.com with ESMTPSA id c204sm14659344pfb.51.2017.02.07.18.25.50 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 07 Feb 2017 18:25:54 -0800 (PST) From: Chris Zhong To: john@metanate.com, dianders@chromium.org, tfiga@chromium.org, heiko@sntech.de, yzq@rock-chips.com, mark.rutland@arm.com, devicetree@vger.kernel.org, robh+dt@kernel.org, galak@codeaurora.org, pawel.moll@arm.com, seanpaul@chromium.org Subject: [PATCH v6 6/6] drm/rockchip/dsi: add dw-mipi power domain support Date: Wed, 8 Feb 2017 10:25:22 +0800 Message-Id: <1486520722-8853-7-git-send-email-zyw@rock-chips.com> X-Mailer: git-send-email 2.6.3 In-Reply-To: <1486520722-8853-1-git-send-email-zyw@rock-chips.com> References: <1486520722-8853-1-git-send-email-zyw@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170207_182612_773130_06D59C63 X-CRM114-Status: GOOD ( 11.01 ) 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: David Airlie , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, Chris Zhong , linux-arm-kernel@lists.infradead.org, Mark Yao 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 Reference the power domain incase dw-mipi power down when in use. Signed-off-by: Chris Zhong Reviewed-by: Sean Paul --- Changes in v6: None Changes in v5: None Changes in v4: None Changes in v3: None drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c index a2b4ec4..2ee2317 100644 --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -293,6 +294,7 @@ struct dw_mipi_dsi { struct clk *pclk; struct clk *phy_cfg_clk; + int dpms_mode; unsigned int lane_mbps; /* per lane */ u32 channel; u32 lanes; @@ -960,6 +962,9 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder) { struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder); + if (dsi->dpms_mode != DRM_MODE_DPMS_ON) + return; + if (clk_prepare_enable(dsi->pclk)) { dev_err(dsi->dev, "%s: Failed to enable pclk\n", __func__); return; @@ -971,7 +976,9 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder) drm_panel_unprepare(dsi->panel); dw_mipi_dsi_disable(dsi); + pm_runtime_put(dsi->dev); clk_disable_unprepare(dsi->pclk); + dsi->dpms_mode = DRM_MODE_DPMS_OFF; } static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder) @@ -987,11 +994,15 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder) if (ret < 0) return; + if (dsi->dpms_mode == DRM_MODE_DPMS_ON) + return; + if (clk_prepare_enable(dsi->pclk)) { dev_err(dsi->dev, "%s: Failed to enable pclk\n", __func__); return; } + pm_runtime_get_sync(dsi->dev); dw_mipi_dsi_init(dsi); dw_mipi_dsi_dpi_config(dsi, mode); dw_mipi_dsi_packet_handler_config(dsi); @@ -1027,6 +1038,7 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder) regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val); dev_dbg(dsi->dev, "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG"); + dsi->dpms_mode = DRM_MODE_DPMS_ON; } static int @@ -1194,6 +1206,7 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master, dsi->dev = dev; dsi->pdata = pdata; + dsi->dpms_mode = DRM_MODE_DPMS_OFF; ret = rockchip_mipi_parse_dt(dsi); if (ret) @@ -1274,6 +1287,8 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master, dev_set_drvdata(dev, dsi); + pm_runtime_enable(dev); + dsi->dsi_host.ops = &dw_mipi_dsi_host_ops; dsi->dsi_host.dev = dev; ret = mipi_dsi_host_register(&dsi->dsi_host); @@ -1296,6 +1311,7 @@ static void dw_mipi_dsi_unbind(struct device *dev, struct device *master, struct dw_mipi_dsi *dsi = dev_get_drvdata(dev); mipi_dsi_host_unregister(&dsi->dsi_host); + pm_runtime_disable(dev); clk_disable_unprepare(dsi->pllref_clk); }