From patchwork Tue Apr 9 00:24:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Ond=C5=99ej_Jirman?= X-Patchwork-Id: 10890293 X-Patchwork-Delegate: johannes@sipsolutions.net 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 932151390 for ; Tue, 9 Apr 2019 00:26:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7B0ED286B1 for ; Tue, 9 Apr 2019 00:26:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6F10D287CB; Tue, 9 Apr 2019 00:26:17 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 0D922286B1 for ; Tue, 9 Apr 2019 00:26:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727958AbfDIA0P (ORCPT ); Mon, 8 Apr 2019 20:26:15 -0400 Received: from vps.xff.cz ([195.181.215.36]:36212 "EHLO vps.xff.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726885AbfDIAZI (ORCPT ); Mon, 8 Apr 2019 20:25:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megous.com; s=mail; t=1554769501; bh=VkQoH6CXHm1XnyYK3skp3BPEyuZWDtRMncNrhU7EJQM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nKtWc8/E61ajiGcGZpBIZNCU5X4yb8KE9vahtA/sTeMLvt5a7SE6EuJRnM91ypW2V OSr6+SuVmvfNZcnvEaDJGib+YIbUiwqFDWVNx7F8re37hTShYYo01xjWZl3M7jcHjT AH+5eR0zzPeBOUm279pyPepZXbz4CuPOzFF+8c3A= From: megous@megous.com To: linux-sunxi@googlegroups.com, Maxime Ripard , Chen-Yu Tsai , Rob Herring , Linus Walleij Cc: Ondrej Jirman , David Airlie , Daniel Vetter , Mark Rutland , Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , "David S. Miller" , Maxime Coquelin , Arend van Spriel , Franky Lin , Hante Meuleman , Chi-Hsien Lin , Wright Feng , Kalle Valo , Naveen Gupta , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-wireless@vger.kernel.org, brcm80211-dev-list.pdl@broadcom.com, brcm80211-dev-list@cypress.com, linux-gpio@vger.kernel.org Subject: [PATCH v2 08/13] drm: sun4i: Add support for enabling DDC I2C bus to dw_hdmi glue Date: Tue, 9 Apr 2019 02:24:47 +0200 Message-Id: <20190409002452.14551-9-megous@megous.com> In-Reply-To: <20190409002452.14551-1-megous@megous.com> References: <20190409002452.14551-1-megous@megous.com> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ondrej Jirman Orange Pi 3 board requires enabling DDC I2C bus via some GPIO connected transistors, before it can be used. Model this as a power supply for DDC (via regulator framework). Signed-off-by: Ondrej Jirman --- drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 17 ++++++++++++++++- drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h | 1 + 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c index dc47720c99ba..a1518525fa2f 100644 --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c @@ -146,16 +146,28 @@ static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master, return PTR_ERR(hdmi->regulator); } + hdmi->ddc_regulator = devm_regulator_get(dev, "ddc"); + if (IS_ERR(hdmi->ddc_regulator)) { + dev_err(dev, "Couldn't get ddc regulator\n"); + return PTR_ERR(hdmi->ddc_regulator); + } + ret = regulator_enable(hdmi->regulator); if (ret) { dev_err(dev, "Failed to enable regulator\n"); return ret; } + ret = regulator_enable(hdmi->ddc_regulator); + if (ret) { + dev_err(dev, "Failed to enable ddc regulator\n"); + goto err_disable_regulator; + } + ret = reset_control_deassert(hdmi->rst_ctrl); if (ret) { dev_err(dev, "Could not deassert ctrl reset control\n"); - goto err_disable_regulator; + goto err_disable_ddc_regulator; } ret = clk_prepare_enable(hdmi->clk_tmds); @@ -208,6 +220,8 @@ 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_ddc_regulator: + regulator_disable(hdmi->ddc_regulator); err_disable_regulator: regulator_disable(hdmi->regulator); @@ -223,6 +237,7 @@ 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->ddc_regulator); regulator_disable(hdmi->regulator); } diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h index 720c5aa8adc1..6e93d55560b6 100644 --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h @@ -188,6 +188,7 @@ struct sun8i_dw_hdmi { struct sun8i_hdmi_phy *phy; struct dw_hdmi_plat_data plat_data; struct regulator *regulator; + struct regulator *ddc_regulator; const struct sun8i_dw_hdmi_quirks *quirks; struct reset_control *rst_ctrl; };