From patchwork Tue Sep 4 04:40:52 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Icenowy Zheng X-Patchwork-Id: 10586613 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B831B14E0 for ; Tue, 4 Sep 2018 04:42:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A67FD2904C for ; Tue, 4 Sep 2018 04:42:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9B16229050; Tue, 4 Sep 2018 04:42:44 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 319582904C for ; Tue, 4 Sep 2018 04:42:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727676AbeIDJF4 (ORCPT ); Tue, 4 Sep 2018 05:05:56 -0400 Received: from hermes.aosc.io ([199.195.250.187]:45081 "EHLO hermes.aosc.io" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727266AbeIDJF4 (ORCPT ); Tue, 4 Sep 2018 05:05:56 -0400 Received: from localhost (localhost [127.0.0.1]) (Authenticated sender: icenowy@aosc.io) by hermes.aosc.io (Postfix) with ESMTPSA id 58F83FFA39; Tue, 4 Sep 2018 04:42:32 +0000 (UTC) From: Icenowy Zheng To: Maxime Ripard , Chen-Yu Tsai , Jagan Teki , Jernej Skrabec Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-sunxi@googlegroups.com, Icenowy Zheng Subject: [PATCH v4 10/11] drm/sun4i: Add support for HDMI voltage regulator Date: Tue, 4 Sep 2018 12:40:52 +0800 Message-Id: <20180904044053.15425-11-icenowy@aosc.io> In-Reply-To: <20180904044053.15425-1-icenowy@aosc.io> References: <20180904044053.15425-1-icenowy@aosc.io> Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jernej Skrabec Some boards have HDMI VCC pin connected to voltage regulator which may not be turned on by default. Add support for such boards by adding voltage regulator handling code to HDMI driver. Signed-off-by: Jernej Skrabec [Icenowy: change supply name to "hvcc"] Signed-off-by: Icenowy Zheng --- Changes in v4: - Rename the supply name to "hvcc". Changes in v3.1: - New patch. (Replaced "drm: sun4i: add support for HVCC regulator for DWC HDMI glue" by Icenowy.) drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 17 ++++++++++++++++- drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h | 2 ++ 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c index 31875b636434..ed2983770e9c 100644 --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c @@ -125,10 +125,22 @@ static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master, return PTR_ERR(hdmi->clk_tmds); } + hdmi->regulator = devm_regulator_get(dev, "hvcc"); + if (IS_ERR(hdmi->regulator)) { + dev_err(dev, "Couldn't get regulator\n"); + return PTR_ERR(hdmi->regulator); + } + + ret = regulator_enable(hdmi->regulator); + if (ret) { + dev_err(dev, "Failed to enable regulator\n"); + return ret; + } + ret = reset_control_deassert(hdmi->rst_ctrl); if (ret) { dev_err(dev, "Could not deassert ctrl reset control\n"); - return ret; + goto err_disable_regulator; } ret = clk_prepare_enable(hdmi->clk_tmds); @@ -183,6 +195,8 @@ static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master, clk_disable_unprepare(hdmi->clk_tmds); err_assert_ctrl_reset: reset_control_assert(hdmi->rst_ctrl); +err_disable_regulator: + regulator_disable(hdmi->regulator); return ret; } @@ -196,6 +210,7 @@ static void sun8i_dw_hdmi_unbind(struct device *dev, struct device *master, sun8i_hdmi_phy_remove(hdmi); clk_disable_unprepare(hdmi->clk_tmds); reset_control_assert(hdmi->rst_ctrl); + regulator_disable(hdmi->regulator); } static const struct component_ops sun8i_dw_hdmi_ops = { diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h index aadbe0a10b0c..7fdc1ecd2892 100644 --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h @@ -10,6 +10,7 @@ #include #include #include +#include #include #define SUN8I_HDMI_PHY_DBG_CTRL_REG 0x0000 @@ -176,6 +177,7 @@ struct sun8i_dw_hdmi { struct drm_encoder encoder; struct sun8i_hdmi_phy *phy; struct dw_hdmi_plat_data plat_data; + struct regulator *regulator; struct reset_control *rst_ctrl; };