From patchwork Mon Jul 11 11:05:52 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yakir Yang X-Patchwork-Id: 9223343 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 CBE6A60572 for ; Mon, 11 Jul 2016 11:08:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BC25727C4B for ; Mon, 11 Jul 2016 11:08:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B0E4A27CEA; Mon, 11 Jul 2016 11:08:09 +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 autolearn=unavailable version=3.3.1 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.wl.linuxfoundation.org (Postfix) with ESMTPS id A5E3A27C4B for ; Mon, 11 Jul 2016 11:08:08 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bMZ3A-0008AF-FN; Mon, 11 Jul 2016 11:06:56 +0000 Received: from lucky1.263xmail.com ([211.157.147.135]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bMZ2V-0007Qm-8P; Mon, 11 Jul 2016 11:06:16 +0000 Received: from ykk?rock-chips.com (unknown [192.168.167.159]) by lucky1.263xmail.com (Postfix) with SMTP id 1C93D7A1; Mon, 11 Jul 2016 19:05:54 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id E34E2348A; Mon, 11 Jul 2016 19:05:51 +0800 (CST) X-RL-SENDER: ykk@rock-chips.com X-FST-TO: mark.yao@rock-chips.com X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: ykk@rock-chips.com X-UNIQUE-TAG: <41fa9d5924f2c9023cab904a544c5700> X-ATTACHMENT-NUM: 0 X-SENDER: ykk@rock-chips.com X-DNS-TYPE: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith ESMTP id 3784Z7XJ9G; Mon, 11 Jul 2016 19:05:53 +0800 (CST) From: Yakir Yang To: Mark Yao , Heiko Stuebner , Rob Herring , Russell King , Philipp Zabel , Andy Yan Subject: [PATCH v1 6/6] drm/rockchip: dw_hdmi: introduce the pclk for grf Date: Mon, 11 Jul 2016 19:05:52 +0800 Message-Id: <1468235152-29683-1-git-send-email-ykk@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1468235079-29152-1-git-send-email-ykk@rock-chips.com> References: <1468235079-29152-1-git-send-email-ykk@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160711_040615_890619_94D4C4D9 X-CRM114-Status: GOOD ( 10.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, David Airlie , Daniel Vetter , Yakir Yang , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, Kumar Gala , xhc@rock-chips.com, linux-arm-kernel@lists.infradead.org, Zheng Yang 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 For RK3399's GRF module, if we want to operate the graphic related grf registers, we need to enable the pclk_vio_grf which supply power for VIO GRF IOs, so it's better to introduce an optional grf clock in driver. Signed-off-by: Yakir Yang --- .../bindings/display/rockchip/dw_hdmi-rockchip.txt | 3 ++- drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 20 ++++++++++++++++++++ 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/display/rockchip/dw_hdmi-rockchip.txt b/Documentation/devicetree/bindings/display/rockchip/dw_hdmi-rockchip.txt index 4e23ca4..e22d70f 100644 --- a/Documentation/devicetree/bindings/display/rockchip/dw_hdmi-rockchip.txt +++ b/Documentation/devicetree/bindings/display/rockchip/dw_hdmi-rockchip.txt @@ -18,7 +18,8 @@ Required properties: Optional properties - ddc-i2c-bus: phandle of an I2C controller used for DDC EDID probing - clocks, clock-names: phandle to the HDMI CEC clock, name should be "cec", - phandle to the VPLL clock, name should be "vpll". + phandle to the VPLL clock, name should be "vpll", + phandle to the GRF clock, name should be "grf". Example: hdmi: hdmi@ff980000 { diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c index 701bb73..69e6efb 100644 --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c @@ -36,6 +36,7 @@ struct rockchip_hdmi { struct drm_encoder encoder; enum dw_hdmi_devtype dev_type; struct clk *vpll_clk; + struct clk *grf_clk; }; #define to_rockchip_hdmi(x) container_of(x, struct rockchip_hdmi, x) @@ -166,6 +167,16 @@ static int rockchip_hdmi_parse_dt(struct rockchip_hdmi *hdmi) return PTR_ERR(hdmi->vpll_clk); } + hdmi->grf_clk = devm_clk_get(hdmi->dev, "grf"); + if (PTR_ERR(hdmi->grf_clk) == -ENOENT) { + hdmi->grf_clk = NULL; + } else if (PTR_ERR(hdmi->grf_clk) == -EPROBE_DEFER) { + return -EPROBE_DEFER; + } else if (IS_ERR(hdmi->grf_clk)) { + dev_err(hdmi->dev, "failed to get grf clock\n"); + return PTR_ERR(hdmi->grf_clk); + } + ret = clk_prepare_enable(hdmi->vpll_clk); if (ret) { dev_err(hdmi->dev, "Failed to enable HDMI vpll: %d\n", ret); @@ -225,6 +236,7 @@ static void dw_hdmi_rockchip_encoder_enable(struct drm_encoder *encoder) u32 lcdsel_grf_reg, lcdsel_mask; u32 val; int mux; + int ret; switch (hdmi->dev_type) { case RK3288_HDMI: @@ -245,9 +257,17 @@ static void dw_hdmi_rockchip_encoder_enable(struct drm_encoder *encoder) else val = HIWORD_UPDATE(0, lcdsel_mask); + ret = clk_prepare_enable(hdmi->grf_clk); + if (ret < 0) { + dev_err(hdmi->dev, "failed to enable grfclk %d\n", ret); + return; + } + regmap_write(hdmi->regmap, lcdsel_grf_reg, val); dev_dbg(hdmi->dev, "vop %s output to hdmi\n", (mux) ? "LIT" : "BIG"); + + clk_disable_unprepare(hdmi->grf_clk); } static int