From patchwork Wed Feb 17 11:28:47 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Zabel X-Patchwork-Id: 8336991 Return-Path: X-Original-To: patchwork-linux-mediatek@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id E1F62C02AE for ; Wed, 17 Feb 2016 11:30:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 06E3B2038D for ; Wed, 17 Feb 2016 11:30:17 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9195F20382 for ; Wed, 17 Feb 2016 11:30:08 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aW0J6-0004PX-2u; Wed, 17 Feb 2016 11:30:08 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aW0Iq-0003pD-GR for linux-mediatek@lists.infradead.org; Wed, 17 Feb 2016 11:29:54 +0000 Received: from paszta.hi.4.pengutronix.de ([10.1.0.120] helo=paszta.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1aW0ID-0000s2-2K; Wed, 17 Feb 2016 12:29:13 +0100 From: Philipp Zabel To: dri-devel@lists.freedesktop.org Subject: [PATCH v11 07/14] drm/mediatek: enable hdmi output control bit Date: Wed, 17 Feb 2016 12:28:47 +0100 Message-Id: <1455708534-20274-8-git-send-email-p.zabel@pengutronix.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1455708534-20274-1-git-send-email-p.zabel@pengutronix.de> References: <1455708534-20274-1-git-send-email-p.zabel@pengutronix.de> X-SA-Exim-Connect-IP: 10.1.0.120 X-SA-Exim-Mail-From: p.zabel@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-mediatek@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160217_032952_998519_8667E67D X-CRM114-Status: GOOD ( 11.21 ) X-Spam-Score: -1.9 (-) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Stephen Boyd , Michael Turquette , Dave Airlie , Jie Qiu , Cawa Cheng , Daniel Stone , YT Shen , Yingjoe Chen , Philipp Zabel , devicetree@vger.kernel.org, Jitao Shi , kernel@pengutronix.de, Pawel Moll , Ian Campbell , CK Hu , Rob Herring , linux-mediatek@lists.infradead.org, Matthias Brugger , Paul Bolle , Emil Velikov , Tomasz Figa , Daniel Vetter , Kumar Gala MIME-Version: 1.0 Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jie Qiu MT8173 HDMI hardware has a output control bit to enable/disable HDMI output. Because of security reason, so this bit can ONLY be controlled in ARM supervisor mode. Now the only way to enter ARM supervisor is the ARM trusted firmware. So atf provides a API for HDMI driver to call to setup this HDMI control bit to enable HDMI output in supervisor mode. Signed-off-by: Jie Qiu Signed-off-by: Philipp Zabel --- drivers/gpu/drm/mediatek/mtk_hdmi_hw.c | 12 ++++++++++++ drivers/gpu/drm/mediatek/mtk_hdmi_regs.h | 1 + 2 files changed, 13 insertions(+) diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_hw.c b/drivers/gpu/drm/mediatek/mtk_hdmi_hw.c index 99c7ffc..ea4e35f 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi_hw.c +++ b/drivers/gpu/drm/mediatek/mtk_hdmi_hw.c @@ -15,6 +15,7 @@ #include "mtk_hdmi_regs.h" #include "mtk_hdmi.h" +#include #include #include #include @@ -50,6 +51,17 @@ void mtk_hdmi_hw_vid_black(struct mtk_hdmi *hdmi, void mtk_hdmi_hw_make_reg_writable(struct mtk_hdmi *hdmi, bool enable) { + struct arm_smccc_res res; + + /* + * MT8173 HDMI hardware has an output control bit to enable/disable HDMI + * output. This bit can only be controlled in ARM supervisor mode. + * The ARM trusted firmware provides an API for the HDMI driver to set + * this control bit to enable HDMI output in supervisor mode. + */ + arm_smccc_smc(MTK_SIP_SET_AUTHORIZED_SECURE_REG, 0x14000904, 0x80000000, + 0, 0, 0, 0, 0, &res); + regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20, HDMI_PCLK_FREE_RUN, enable ? HDMI_PCLK_FREE_RUN : 0); regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG1C, diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_regs.h b/drivers/gpu/drm/mediatek/mtk_hdmi_regs.h index 8c1d318..d88279f 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi_regs.h +++ b/drivers/gpu/drm/mediatek/mtk_hdmi_regs.h @@ -218,4 +218,5 @@ #define MHL_SYNC_AUTO_EN BIT(30) #define HDMI_PCLK_FREE_RUN BIT(31) +#define MTK_SIP_SET_AUTHORIZED_SECURE_REG 0x82000001 #endif