Message-Id: <20171218121445.6086-1-jacob-chen@iotwrt.com>
Date:   Mon, 18 Dec 2017 20:14:33 +0800
From:   Jacob Chen <jacob-chen@...wrt.com>
To:     linux-rockchip@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        mchehab@...nel.org, linux-media@...r.kernel.org,
        sakari.ailus@...ux.intel.com, hans.verkuil@...co.com,
        tfiga@...omium.org, zhengsq@...k-chips.com,
        laurent.pinchart@...asonboard.com, zyc@...k-chips.com,
        eddie.cai.linux@...il.com, jeffy.chen@...k-chips.com,
        allon.huang@...k-chips.com, devicetree@...r.kernel.org,
        heiko@...ech.de, robh+dt@...nel.org, Joao.Pinto@...opsys.com,
        Luis.Oliveira@...opsys.com, Jose.Abreu@...opsys.com,
        Jacob Chen <jacob2.chen@...k-chips.com>
Subject: [PATCH v4 04/16] media: rkisp1: add Rockchip MIPI Synopsys DPHY driver

From: Jacob Chen <jacob2.chen@...k-chips.com>

This commit adds a subdev driver for Rockchip MIPI Synopsys DPHY driver

Signed-off-by: Jacob Chen <jacob2.chen@...k-chips.com>
Signed-off-by: Shunqian Zheng <zhengsq@...k-chips.com>
Signed-off-by: Tomasz Figa <tfiga@...omium.org>
---
 .../media/platform/rockchip/isp1/mipi_dphy_sy.c    | 787 +++++++++++++++++++++
 1 file changed, 787 insertions(+)
 create mode 100644 drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c

diff --git a/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c b/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c
new file mode 100644
index 000000000000..942118366f49
--- /dev/null
+++ b/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c
@@ -0,0 +1,787 @@
+/*
+ * Rockchip MIPI Synopsys DPHY driver
+ *
+ * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <media/media-entity.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#define RK3288_GRF_SOC_CON6	0x025c
+#define RK3288_GRF_SOC_CON8	0x0264
+#define RK3288_GRF_SOC_CON9	0x0268
+#define RK3288_GRF_SOC_CON10	0x026c
+#define RK3288_GRF_SOC_CON14	0x027c
+#define RK3288_GRF_SOC_STATUS21	0x02d4
+#define RK3288_GRF_IO_VSEL	0x0380
+#define RK3288_GRF_SOC_CON15	0x03a4
+
+#define RK3399_GRF_SOC_CON9	0x6224
+#define RK3399_GRF_SOC_CON21	0x6254
+#define RK3399_GRF_SOC_CON22	0x6258
+#define RK3399_GRF_SOC_CON23	0x625c
+#define RK3399_GRF_SOC_CON24	0x6260
+#define RK3399_GRF_SOC_CON25	0x6264
+#define RK3399_GRF_SOC_STATUS1	0xe2a4
+
+#define CLOCK_LANE_HS_RX_CONTROL		0x34
+#define LANE0_HS_RX_CONTROL			0x44
+#define LANE1_HS_RX_CONTROL			0x54
+#define LANE2_HS_RX_CONTROL			0x84
+#define LANE3_HS_RX_CONTROL			0x94
+#define HS_RX_DATA_LANES_THS_SETTLE__CONTROL	0x75
+
+#define HIWORD_UPDATE(val, mask, shift) \
+	((val) << (shift) | (mask) << ((shift) + 16))
+
+enum mipi_dphy_sy_pads {
+	MIPI_DPHY_SY_PAD_SINK = 0,
+	MIPI_DPHY_SY_PAD_SOURCE,
+	MIPI_DPHY_SY_PADS_NUM,
+};
+
+enum dphy_reg_id {
+	GRF_DPHY_RX0_TURNDISABLE = 0,
+	GRF_DPHY_RX0_FORCERXMODE,
+	GRF_DPHY_RX0_FORCETXSTOPMODE,
+	GRF_DPHY_RX0_ENABLE,
+	GRF_DPHY_RX0_TESTCLR,
+	GRF_DPHY_RX0_TESTCLK,
+	GRF_DPHY_RX0_TESTEN,
+	GRF_DPHY_RX0_TESTDIN,
+	GRF_DPHY_RX0_TURNREQUEST,
+	GRF_DPHY_RX0_TESTDOUT,
+	GRF_DPHY_TX0_TURNDISABLE,
+	GRF_DPHY_TX0_FORCERXMODE,
+	GRF_DPHY_TX0_FORCETXSTOPMODE,
+	GRF_DPHY_TX0_TURNREQUEST,
+	GRF_DPHY_TX1RX1_TURNDISABLE,
+	GRF_DPHY_TX1RX1_FORCERXMODE,
+	GRF_DPHY_TX1RX1_FORCETXSTOPMODE,
+	GRF_DPHY_TX1RX1_ENABLE,
+	GRF_DPHY_TX1RX1_MASTERSLAVEZ,
+	GRF_DPHY_TX1RX1_BASEDIR,
+	GRF_DPHY_TX1RX1_ENABLECLK,
+	GRF_DPHY_TX1RX1_TURNREQUEST,
+	GRF_DPHY_RX1_SRC_SEL,
+	/* rk3288 only */
+	GRF_CON_DISABLE_ISP,
+	GRF_CON_ISP_DPHY_SEL,
+	GRF_DSI_CSI_TESTBUS_SEL,
+	GRF_DVP_V18SEL,
+	/* below is for rk3399 only */
+	GRF_DPHY_RX0_CLK_INV_SEL,
+	GRF_DPHY_RX1_CLK_INV_SEL,
+};
+
+struct dphy_reg {
+	u32 offset;
+	u32 mask;
+	u32 shift;
+};
+
+#define PHY_REG(_offset, _width, _shift) \
+	{ .offset = _offset, .mask = BIT(_width) - 1, .shift = _shift, }
+
+static const struct dphy_reg rk3399_grf_dphy_regs[] = {
+	[GRF_DPHY_RX0_TURNREQUEST] = PHY_REG(RK3399_GRF_SOC_CON9, 4, 0),
+	[GRF_DPHY_RX0_CLK_INV_SEL] = PHY_REG(RK3399_GRF_SOC_CON9, 1, 10),
+	[GRF_DPHY_RX1_CLK_INV_SEL] = PHY_REG(RK3399_GRF_SOC_CON9, 1, 11),
+	[GRF_DPHY_RX0_ENABLE] = PHY_REG(RK3399_GRF_SOC_CON21, 4, 0),
+	[GRF_DPHY_RX0_FORCERXMODE] = PHY_REG(RK3399_GRF_SOC_CON21, 4, 4),
+	[GRF_DPHY_RX0_FORCETXSTOPMODE] = PHY_REG(RK3399_GRF_SOC_CON21, 4, 8),
+	[GRF_DPHY_RX0_TURNDISABLE] = PHY_REG(RK3399_GRF_SOC_CON21, 4, 12),
+	[GRF_DPHY_TX0_FORCERXMODE] = PHY_REG(RK3399_GRF_SOC_CON22, 4, 0),
+	[GRF_DPHY_TX0_FORCETXSTOPMODE] = PHY_REG(RK3399_GRF_SOC_CON22, 4, 4),
+	[GRF_DPHY_TX0_TURNDISABLE] = PHY_REG(RK3399_GRF_SOC_CON22, 4, 8),
+	[GRF_DPHY_TX0_TURNREQUEST] = PHY_REG(RK3399_GRF_SOC_CON22, 4, 12),
+	[GRF_DPHY_TX1RX1_ENABLE] = PHY_REG(RK3399_GRF_SOC_CON23, 4, 0),
+	[GRF_DPHY_TX1RX1_FORCERXMODE] = PHY_REG(RK3399_GRF_SOC_CON23, 4, 4),
+	[GRF_DPHY_TX1RX1_FORCETXSTOPMODE] = PHY_REG(RK3399_GRF_SOC_CON23, 4, 8),
+	[GRF_DPHY_TX1RX1_TURNDISABLE] = PHY_REG(RK3399_GRF_SOC_CON23, 4, 12),
+	[GRF_DPHY_TX1RX1_TURNREQUEST] = PHY_REG(RK3399_GRF_SOC_CON24, 4, 0),
+	[GRF_DPHY_RX1_SRC_SEL] = PHY_REG(RK3399_GRF_SOC_CON24, 1, 4),
+	[GRF_DPHY_TX1RX1_BASEDIR] = PHY_REG(RK3399_GRF_SOC_CON24, 1, 5),
+	[GRF_DPHY_TX1RX1_ENABLECLK] = PHY_REG(RK3399_GRF_SOC_CON24, 1, 6),
+	[GRF_DPHY_TX1RX1_MASTERSLAVEZ] = PHY_REG(RK3399_GRF_SOC_CON24, 1, 7),
+	[GRF_DPHY_RX0_TESTDIN] = PHY_REG(RK3399_GRF_SOC_CON25, 8, 0),
+	[GRF_DPHY_RX0_TESTEN] = PHY_REG(RK3399_GRF_SOC_CON25, 1, 8),
+	[GRF_DPHY_RX0_TESTCLK] = PHY_REG(RK3399_GRF_SOC_CON25, 1, 9),
+	[GRF_DPHY_RX0_TESTCLR] = PHY_REG(RK3399_GRF_SOC_CON25, 1, 10),
+	[GRF_DPHY_RX0_TESTDOUT] = PHY_REG(RK3399_GRF_SOC_STATUS1, 8, 0),
+};
+
+static const struct dphy_reg rk3288_grf_dphy_regs[] = {
+	[GRF_CON_DISABLE_ISP] = PHY_REG(RK3288_GRF_SOC_CON6, 1, 0),
+	[GRF_CON_ISP_DPHY_SEL] = PHY_REG(RK3288_GRF_SOC_CON6, 1, 1),
+	[GRF_DSI_CSI_TESTBUS_SEL] = PHY_REG(RK3288_GRF_SOC_CON6, 1, 14),
+	[GRF_DPHY_TX0_TURNDISABLE] = PHY_REG(RK3288_GRF_SOC_CON8, 4, 0),
+	[GRF_DPHY_TX0_FORCERXMODE] = PHY_REG(RK3288_GRF_SOC_CON8, 4, 4),
+	[GRF_DPHY_TX0_FORCETXSTOPMODE] = PHY_REG(RK3288_GRF_SOC_CON8, 4, 8),
+	[GRF_DPHY_TX1RX1_TURNDISABLE] = PHY_REG(RK3288_GRF_SOC_CON9, 4, 0),
+	[GRF_DPHY_TX1RX1_FORCERXMODE] = PHY_REG(RK3288_GRF_SOC_CON9, 4, 4),
+	[GRF_DPHY_TX1RX1_FORCETXSTOPMODE] = PHY_REG(RK3288_GRF_SOC_CON9, 4, 8),
+	[GRF_DPHY_TX1RX1_ENABLE] = PHY_REG(RK3288_GRF_SOC_CON9, 4, 12),
+	[GRF_DPHY_RX0_TURNDISABLE] = PHY_REG(RK3288_GRF_SOC_CON10, 4, 0),
+	[GRF_DPHY_RX0_FORCERXMODE] = PHY_REG(RK3288_GRF_SOC_CON10, 4, 4),
+	[GRF_DPHY_RX0_FORCETXSTOPMODE] = PHY_REG(RK3288_GRF_SOC_CON10, 4, 8),
+	[GRF_DPHY_RX0_ENABLE] = PHY_REG(RK3288_GRF_SOC_CON10, 4, 12),
+	[GRF_DPHY_RX0_TESTCLR] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 0),
+	[GRF_DPHY_RX0_TESTCLK] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 1),
+	[GRF_DPHY_RX0_TESTEN] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 2),
+	[GRF_DPHY_RX0_TESTDIN] = PHY_REG(RK3288_GRF_SOC_CON14, 8, 3),
+	[GRF_DPHY_TX1RX1_ENABLECLK] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 12),
+	[GRF_DPHY_RX1_SRC_SEL] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 13),
+	[GRF_DPHY_TX1RX1_MASTERSLAVEZ] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 14),
+	[GRF_DPHY_TX1RX1_BASEDIR] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 15),
+	[GRF_DPHY_RX0_TURNREQUEST] = PHY_REG(RK3288_GRF_SOC_CON15, 4, 0),
+	[GRF_DPHY_TX1RX1_TURNREQUEST] = PHY_REG(RK3288_GRF_SOC_CON15, 4, 4),
+	[GRF_DPHY_TX0_TURNREQUEST] = PHY_REG(RK3288_GRF_SOC_CON15, 3, 8),
+	[GRF_DVP_V18SEL] = PHY_REG(RK3288_GRF_IO_VSEL, 1, 1),
+	[GRF_DPHY_RX0_TESTDOUT] = PHY_REG(RK3288_GRF_SOC_STATUS21, 8, 0),
+};
+
+struct hsfreq_range {
+	u32 range_h;
+	u8 cfg_bit;
+};
+
+struct dphy_drv_data {
+	const char * const *clks;
+	int num_clks;
+	const struct hsfreq_range *hsfreq_ranges;
+	int num_hsfreq_ranges;
+	const struct dphy_reg *regs;
+};
+
+struct sensor_async_subdev {
+	struct v4l2_async_subdev asd;
+	struct v4l2_mbus_config mbus;
+	int lanes;
+};
+
+#define MAX_DPHY_CLK		8
+#define MAX_DPHY_SENSORS	2
+
+struct mipidphy_sensor {
+	struct v4l2_subdev *sd;
+	struct v4l2_mbus_config mbus;
+	int lanes;
+};
+
+struct mipidphy_priv {
+	struct device *dev;
+	struct regmap *regmap_grf;
+	const struct dphy_reg *grf_regs;
+	struct clk *clks[MAX_DPHY_CLK];
+	const struct dphy_drv_data *drv_data;
+	u64 data_rate_mbps;
+	struct v4l2_async_notifier notifier;
+	struct v4l2_subdev sd;
+	struct media_pad pads[MIPI_DPHY_SY_PADS_NUM];
+	struct mipidphy_sensor sensors[MAX_DPHY_SENSORS];
+	int num_sensors;
+	bool is_streaming;
+};
+
+static inline struct mipidphy_priv *to_dphy_priv(struct v4l2_subdev *subdev)
+{
+	return container_of(subdev, struct mipidphy_priv, sd);
+}
+
+static inline void write_reg(struct mipidphy_priv *priv, int index, u8 value)
+{
+	const struct dphy_reg *reg = &priv->grf_regs[index];
+	unsigned int val = HIWORD_UPDATE(value, reg->mask, reg->shift);
+
+	WARN_ON(!reg->offset);
+	regmap_write(priv->regmap_grf, reg->offset, val);
+}
+
+static void mipidphy_wr_reg(struct mipidphy_priv *priv,
+			    u8 test_code, u8 test_data)
+{
+	/*
+	 * With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
+	 * is latched internally as the current test code. Test data is
+	 * programmed internally by rising edge on TESTCLK.
+	 */
+	write_reg(priv, GRF_DPHY_RX0_TESTCLK, 1);
+	write_reg(priv, GRF_DPHY_RX0_TESTDIN, test_code);
+	write_reg(priv, GRF_DPHY_RX0_TESTEN, 1);
+	write_reg(priv, GRF_DPHY_RX0_TESTCLK, 0);
+	write_reg(priv, GRF_DPHY_RX0_TESTEN, 0);
+	write_reg(priv, GRF_DPHY_RX0_TESTDIN, test_data);
+	write_reg(priv, GRF_DPHY_RX0_TESTCLK, 1);
+}
+
+static struct v4l2_subdev *get_remote_sensor(struct v4l2_subdev *sd)
+{
+	struct media_pad *local, *remote;
+	struct media_entity *sensor_me;
+
+	local = &sd->entity.pads[MIPI_DPHY_SY_PAD_SINK];
+	remote = media_entity_remote_pad(local);
+	if (!remote) {
+		v4l2_warn(sd, "No link between dphy and sensor\n");
+		return NULL;
+	}
+
+	sensor_me = media_entity_remote_pad(local)->entity;
+	return media_entity_to_v4l2_subdev(sensor_me);
+}
+
+static struct mipidphy_sensor *sd_to_sensor(struct mipidphy_priv *priv,
+					    struct v4l2_subdev *sd)
+{
+	int i;
+
+	for (i = 0; i < priv->num_sensors; ++i)
+		if (priv->sensors[i].sd == sd)
+			return &priv->sensors[i];
+
+	return NULL;
+}
+
+static int mipidphy_get_sensor_data_rate(struct v4l2_subdev *sd)
+{
+	struct mipidphy_priv *priv = to_dphy_priv(sd);
+	struct v4l2_subdev *sensor_sd = get_remote_sensor(sd);
+	struct v4l2_ctrl *link_freq;
+	struct v4l2_querymenu qm = { .id = V4L2_CID_LINK_FREQ, };
+	int ret;
+
+	link_freq = v4l2_ctrl_find(sensor_sd->ctrl_handler, V4L2_CID_LINK_FREQ);
+	if (!link_freq) {
+		v4l2_warn(sd, "No pixel rate control in subdev\n");
+		return -EPIPE;
+	}
+
+	qm.index = v4l2_ctrl_g_ctrl(link_freq);
+	ret = v4l2_querymenu(sensor_sd->ctrl_handler, &qm);
+	if (ret < 0) {
+		v4l2_err(sd, "Failed to get menu item\n");
+		return ret;
+	}
+
+	if (!qm.value) {
+		v4l2_err(sd, "Invalid link_freq\n");
+		return -EINVAL;
+	}
+	priv->data_rate_mbps = qm.value * 2;
+	do_div(priv->data_rate_mbps, 1000 * 1000);
+
+	return 0;
+}
+
+static int mipidphy_s_stream_start(struct v4l2_subdev *sd)
+{
+	struct mipidphy_priv *priv = to_dphy_priv(sd);
+	const struct dphy_drv_data *drv_data = priv->drv_data;
+	const struct hsfreq_range *hsfreq_ranges = drv_data->hsfreq_ranges;
+	int num_hsfreq_ranges = drv_data->num_hsfreq_ranges;
+	struct v4l2_subdev *sensor_sd = get_remote_sensor(sd);
+	struct mipidphy_sensor *sensor = sd_to_sensor(priv, sensor_sd);
+	int i, ret, hsfreq = 0;
+
+	if (priv->is_streaming)
+		return 0;
+
+	ret = mipidphy_get_sensor_data_rate(sd);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < num_hsfreq_ranges; i++) {
+		if (hsfreq_ranges[i].range_h >= priv->data_rate_mbps) {
+			hsfreq = hsfreq_ranges[i].cfg_bit;
+			break;
+		}
+	}
+
+	write_reg(priv, GRF_DPHY_RX0_FORCERXMODE, 0);
+	write_reg(priv, GRF_DPHY_RX0_FORCETXSTOPMODE, 0);
+	/* Disable lan turn around, which is ignored in receive mode */
+	write_reg(priv, GRF_DPHY_RX0_TURNREQUEST, 0);
+	write_reg(priv, GRF_DPHY_RX0_TURNDISABLE, 0xf);
+
+	write_reg(priv, GRF_DPHY_RX0_ENABLE, GENMASK(sensor->lanes - 1, 0));
+
+	/* dphy start */
+	write_reg(priv, GRF_DPHY_RX0_TESTCLK, 1);
+	write_reg(priv, GRF_DPHY_RX0_TESTCLR, 1);
+	usleep_range(100, 150);
+	write_reg(priv, GRF_DPHY_RX0_TESTCLR, 0);
+	usleep_range(100, 150);
+
+	/* set clock lane */
+	/* HS hsfreq_range & lane 0  settle bypass */
+	mipidphy_wr_reg(priv, CLOCK_LANE_HS_RX_CONTROL, 0);
+	/* HS RX Control of lane0 */
+	mipidphy_wr_reg(priv, LANE0_HS_RX_CONTROL, hsfreq << 1);
+	/* HS RX Control of lane1 */
+	mipidphy_wr_reg(priv, LANE1_HS_RX_CONTROL, 0);
+	/* HS RX Control of lane2 */
+	mipidphy_wr_reg(priv, LANE2_HS_RX_CONTROL, 0);
+	/* HS RX Control of lane3 */
+	mipidphy_wr_reg(priv, LANE3_HS_RX_CONTROL, 0);
+	/* HS RX Data Lanes Settle State Time Control */
+	mipidphy_wr_reg(priv, HS_RX_DATA_LANES_THS_SETTLE__CONTROL, 0x04);
+
+	/* Normal operation */
+	mipidphy_wr_reg(priv, 0x0, 0);
+
+	priv->is_streaming = true;
+
+	return 0;
+}
+
+static int mipidphy_s_stream_stop(struct v4l2_subdev *sd)
+{
+	struct mipidphy_priv *priv = to_dphy_priv(sd);
+
+	if (!priv->is_streaming)
+		return 0;
+
+	priv->is_streaming = false;
+
+	return 0;
+}
+
+static int mipidphy_s_stream(struct v4l2_subdev *sd, int on)
+{
+	if (on)
+		return mipidphy_s_stream_start(sd);
+	else
+		return mipidphy_s_stream_stop(sd);
+}
+
+static int mipidphy_g_mbus_config(struct v4l2_subdev *sd,
+				  struct v4l2_mbus_config *config)
+{
+	struct mipidphy_priv *priv = to_dphy_priv(sd);
+	struct v4l2_subdev *sensor_sd = get_remote_sensor(sd);
+	struct mipidphy_sensor *sensor = sd_to_sensor(priv, sensor_sd);
+
+	*config = sensor->mbus;
+
+	return 0;
+}
+
+static int mipidphy_s_power(struct v4l2_subdev *sd, int on)
+{
+	struct mipidphy_priv *priv = to_dphy_priv(sd);
+
+	if (on)
+		return pm_runtime_get_sync(priv->dev);
+	else
+		return pm_runtime_put(priv->dev);
+}
+
+static int mipidphy_runtime_suspend(struct device *dev)
+{
+	struct media_entity *me = dev_get_drvdata(dev);
+	struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(me);
+	struct mipidphy_priv *priv = to_dphy_priv(sd);
+	int i, num_clks;
+
+	num_clks = priv->drv_data->num_clks;
+	for (i = num_clks - 1; i >= 0; i--)
+		clk_disable_unprepare(priv->clks[i]);
+
+	return 0;
+}
+
+static int mipidphy_runtime_resume(struct device *dev)
+{
+	struct media_entity *me = dev_get_drvdata(dev);
+	struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(me);
+	struct mipidphy_priv *priv = to_dphy_priv(sd);
+	int i, num_clks, ret;
+
+	num_clks = priv->drv_data->num_clks;
+	for (i = 0; i < num_clks; i++) {
+		ret = clk_prepare_enable(priv->clks[i]);
+		if (ret < 0)
+			goto err;
+	}
+
+	return 0;
+err:
+	while (--i >= 0)
+		clk_disable_unprepare(priv->clks[i]);
+	return ret;
+}
+
+/* dphy accepts all fmt/size from sensor */
+static int mipidphy_get_set_fmt(struct v4l2_subdev *sd,
+				struct v4l2_subdev_pad_config *cfg,
+				struct v4l2_subdev_format *fmt)
+{
+	struct v4l2_subdev *sensor = get_remote_sensor(sd);
+
+	/*
+	 * Do not allow format changes and just relay whatever
+	 * set currently in the sensor.
+	 */
+	return v4l2_subdev_call(sensor, pad, get_fmt, NULL, fmt);
+}
+
+static const struct v4l2_subdev_pad_ops mipidphy_subdev_pad_ops = {
+	.set_fmt = mipidphy_get_set_fmt,
+	.get_fmt = mipidphy_get_set_fmt,
+};
+
+static const struct v4l2_subdev_core_ops mipidphy_core_ops = {
+	.s_power = mipidphy_s_power,
+};
+
+static const struct v4l2_subdev_video_ops mipidphy_video_ops = {
+	.g_mbus_config = mipidphy_g_mbus_config,
+	.s_stream = mipidphy_s_stream,
+};
+
+static const struct v4l2_subdev_ops mipidphy_subdev_ops = {
+	.core = &mipidphy_core_ops,
+	.video = &mipidphy_video_ops,
+	.pad = &mipidphy_subdev_pad_ops,
+};
+
+/* These tables must be sorted by .range_h ascending. */
+static const struct hsfreq_range rk3288_mipidphy_hsfreq_ranges[] = {
+	{  89, 0x00}, {  99, 0x10}, { 109, 0x20}, { 129, 0x01},
+	{ 139, 0x11}, { 149, 0x21}, { 169, 0x02}, { 179, 0x12},
+	{ 199, 0x22}, { 219, 0x03}, { 239, 0x13}, { 249, 0x23},
+	{ 269, 0x04}, { 299, 0x14}, { 329, 0x05}, { 359, 0x15},
+	{ 399, 0x25}, { 449, 0x06}, { 499, 0x16}, { 549, 0x07},
+	{ 599, 0x17}, { 649, 0x08}, { 699, 0x18}, { 749, 0x09},
+	{ 799, 0x19}, { 849, 0x29}, { 899, 0x39}, { 949, 0x0a},
+	{ 999, 0x1a}
+};
+
+static const struct hsfreq_range rk3399_mipidphy_hsfreq_ranges[] = {
+	{  89, 0x00}, {  99, 0x10}, { 109, 0x20}, { 129, 0x01},
+	{ 139, 0x11}, { 149, 0x21}, { 169, 0x02}, { 179, 0x12},
+	{ 199, 0x22}, { 219, 0x03}, { 239, 0x13}, { 249, 0x23},
+	{ 269, 0x04}, { 299, 0x14}, { 329, 0x05}, { 359, 0x15},
+	{ 399, 0x25}, { 449, 0x06}, { 499, 0x16}, { 549, 0x07},
+	{ 599, 0x17}, { 649, 0x08}, { 699, 0x18}, { 749, 0x09},
+	{ 799, 0x19}, { 849, 0x29}, { 899, 0x39}, { 949, 0x0a},
+	{ 999, 0x1a}, {1049, 0x2a}, {1099, 0x3a}, {1149, 0x0b},
+	{1199, 0x1b}, {1249, 0x2b}, {1299, 0x3b}, {1349, 0x0c},
+	{1399, 0x1c}, {1449, 0x2c}, {1500, 0x3c}
+};
+
+static const char * const rk3399_mipidphy_clks[] = {
+	"dphy-ref",
+	"dphy-cfg",
+	"grf",
+};
+
+static const char * const rk3288_mipidphy_clks[] = {
+	"dphy-ref",
+	"pclk",
+};
+
+static const struct dphy_drv_data rk3288_mipidphy_drv_data = {
+	.clks = rk3288_mipidphy_clks,
+	.num_clks = ARRAY_SIZE(rk3288_mipidphy_clks),
+	.hsfreq_ranges = rk3288_mipidphy_hsfreq_ranges,
+	.num_hsfreq_ranges = ARRAY_SIZE(rk3288_mipidphy_hsfreq_ranges),
+	.regs = rk3288_grf_dphy_regs,
+};
+
+static const struct dphy_drv_data rk3399_mipidphy_drv_data = {
+	.clks = rk3399_mipidphy_clks,
+	.num_clks = ARRAY_SIZE(rk3399_mipidphy_clks),
+	.hsfreq_ranges = rk3399_mipidphy_hsfreq_ranges,
+	.num_hsfreq_ranges = ARRAY_SIZE(rk3399_mipidphy_hsfreq_ranges),
+	.regs = rk3399_grf_dphy_regs,
+};
+
+static const struct of_device_id rockchip_mipidphy_match_id[] = {
+	{
+		.compatible = "rockchip,rk3399-mipi-dphy",
+		.data = &rk3399_mipidphy_drv_data,
+	},
+	{
+		.compatible = "rockchip,rk3288-mipi-dphy",
+		.data = &rk3288_mipidphy_drv_data,
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, rockchip_mipidphy_match_id);
+
+/* The .bound() notifier callback when a match is found */
+static int
+rockchip_mipidphy_notifier_bound(struct v4l2_async_notifier *notifier,
+				 struct v4l2_subdev *sd,
+				 struct v4l2_async_subdev *asd)
+{
+	struct mipidphy_priv *priv = container_of(notifier,
+						  struct mipidphy_priv,
+						  notifier);
+	struct sensor_async_subdev *s_asd = container_of(asd,
+					struct sensor_async_subdev, asd);
+	struct mipidphy_sensor *sensor;
+	unsigned int pad, ret;
+
+	if (priv->num_sensors == ARRAY_SIZE(priv->sensors))
+		return -EBUSY;
+
+	sensor = &priv->sensors[priv->num_sensors++];
+	sensor->lanes = s_asd->lanes;
+	sensor->mbus = s_asd->mbus;
+	sensor->sd = sd;
+
+	for (pad = 0; pad < sensor->sd->entity.num_pads; pad++)
+		if (sensor->sd->entity.pads[pad].flags
+					& MEDIA_PAD_FL_SOURCE)
+			break;
+
+	if (pad == sensor->sd->entity.num_pads) {
+		dev_err(priv->dev,
+			"failed to find src pad for %s\n",
+			sensor->sd->name);
+
+		return -ENXIO;
+	}
+
+	ret = media_create_pad_link(
+			&sensor->sd->entity, pad,
+			&priv->sd.entity, MIPI_DPHY_SY_PAD_SINK,
+			priv->num_sensors != 1 ? 0 : MEDIA_LNK_FL_ENABLED);
+	if (ret) {
+		dev_err(priv->dev,
+			"failed to create link for %s\n",
+			sensor->sd->name);
+		return ret;
+	}
+
+	return 0;
+}
+
+/* The .unbind callback */
+static void
+rockchip_mipidphy_notifier_unbind(struct v4l2_async_notifier *notifier,
+				  struct v4l2_subdev *sd,
+				  struct v4l2_async_subdev *asd)
+{
+	struct mipidphy_priv *priv = container_of(notifier,
+						  struct mipidphy_priv,
+						  notifier);
+	struct mipidphy_sensor *sensor = sd_to_sensor(priv, sd);
+
+	sensor->sd = NULL;
+}
+
+static const struct
+v4l2_async_notifier_operations rockchip_mipidphy_async_ops = {
+	.bound = rockchip_mipidphy_notifier_bound,
+	.unbind = rockchip_mipidphy_notifier_unbind,
+};
+
+static int rockchip_mipidphy_fwnode_parse(struct device *dev,
+			     struct v4l2_fwnode_endpoint *vep,
+			     struct v4l2_async_subdev *asd)
+{
+	struct sensor_async_subdev *s_asd =
+			container_of(asd, struct sensor_async_subdev, asd);
+	struct v4l2_mbus_config *config = &s_asd->mbus;
+
+	if (vep->bus_type != V4L2_MBUS_CSI2) {
+		dev_err(dev, "Only CSI2 bus type is currently supported\n");
+		return -EINVAL;
+	}
+
+	if (vep->base.port != 0) {
+		dev_err(dev, "The PHY has only port 0\n");
+		return -EINVAL;
+	}
+
+	config->type = V4L2_MBUS_CSI2;
+	config->flags = vep->bus.mipi_csi2.flags;
+	s_asd->lanes = vep->bus.mipi_csi2.num_data_lanes;
+
+	switch (vep->bus.mipi_csi2.num_data_lanes) {
+	case 1:
+		config->flags |= V4L2_MBUS_CSI2_1_LANE;
+		break;
+	case 2:
+		config->flags |= V4L2_MBUS_CSI2_2_LANE;
+		break;
+	case 3:
+		config->flags |= V4L2_MBUS_CSI2_3_LANE;
+		break;
+	case 4:
+		config->flags |= V4L2_MBUS_CSI2_4_LANE;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int rockchip_mipidphy_media_init(struct mipidphy_priv *priv)
+{
+	int ret;
+
+	priv->pads[MIPI_DPHY_SY_PAD_SOURCE].flags =
+		MEDIA_PAD_FL_SOURCE | MEDIA_PAD_FL_MUST_CONNECT;
+	priv->pads[MIPI_DPHY_SY_PAD_SINK].flags =
+		MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT;
+
+	ret = media_entity_pads_init(&priv->sd.entity,
+				 MIPI_DPHY_SY_PADS_NUM, priv->pads);
+	if (ret < 0)
+		return ret;
+
+	ret = v4l2_async_notifier_parse_fwnode_endpoints_by_port(
+		priv->dev, &priv->notifier,
+		sizeof(struct sensor_async_subdev), 0,
+		rockchip_mipidphy_fwnode_parse);
+	if (ret < 0)
+		return ret;
+
+	if (!priv->notifier.num_subdevs)
+		return -ENODEV;	/* no endpoint */
+
+	priv->sd.subdev_notifier = &priv->notifier;
+	priv->notifier.ops = &rockchip_mipidphy_async_ops;
+	ret = v4l2_async_subdev_notifier_register(&priv->sd, &priv->notifier);
+	if (ret) {
+		dev_err(priv->dev,
+			"failed to register async notifier : %d\n", ret);
+		v4l2_async_notifier_cleanup(&priv->notifier);
+		return ret;
+	}
+
+	return v4l2_async_register_subdev(&priv->sd);
+}
+
+static int rockchip_mipidphy_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct v4l2_subdev *sd;
+	struct mipidphy_priv *priv;
+	struct regmap *grf;
+	const struct of_device_id *of_id;
+	const struct dphy_drv_data *drv_data;
+	int i, ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+	priv->dev = dev;
+
+	of_id = of_match_device(rockchip_mipidphy_match_id, dev);
+	if (!of_id)
+		return -EINVAL;
+
+	grf = syscon_node_to_regmap(dev->parent->of_node);
+	if (IS_ERR(grf)) {
+		dev_err(dev, "Can't find GRF syscon\n");
+		return -ENODEV;
+	}
+	priv->regmap_grf = grf;
+
+	drv_data = of_id->data;
+	for (i = 0; i < drv_data->num_clks; i++) {
+		priv->clks[i] = devm_clk_get(dev, drv_data->clks[i]);
+
+		if (IS_ERR(priv->clks[i])) {
+			dev_err(dev, "Failed to get %s\n", drv_data->clks[i]);
+			return PTR_ERR(priv->clks[i]);
+		}
+	}
+
+	priv->grf_regs = drv_data->regs;
+	priv->drv_data = drv_data;
+
+	sd = &priv->sd;
+	v4l2_subdev_init(sd, &mipidphy_subdev_ops);
+	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	snprintf(sd->name, sizeof(sd->name), "rockchip-sy-mipi-dphy");
+	sd->dev = dev;
+
+	platform_set_drvdata(pdev, &sd->entity);
+
+	ret = rockchip_mipidphy_media_init(priv);
+	if (ret < 0)
+		return ret;
+
+	pm_runtime_enable(&pdev->dev);
+
+	return 0;
+}
+
+static int rockchip_mipidphy_remove(struct platform_device *pdev)
+{
+	struct media_entity *me = platform_get_drvdata(pdev);
+	struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(me);
+
+	media_entity_cleanup(&sd->entity);
+
+	pm_runtime_disable(&pdev->dev);
+
+	return 0;
+}
+
+static const struct dev_pm_ops rockchip_mipidphy_pm_ops = {
+	SET_RUNTIME_PM_OPS(mipidphy_runtime_suspend,
+			   mipidphy_runtime_resume, NULL)
+};
+
+static struct platform_driver rockchip_isp_mipidphy_driver = {
+	.probe = rockchip_mipidphy_probe,
+	.remove = rockchip_mipidphy_remove,
+	.driver = {
+			.name = "rockchip-sy-mipi-dphy",
+			.pm = &rockchip_mipidphy_pm_ops,
+			.of_match_table = rockchip_mipidphy_match_id,
+	},
+};
+
+module_platform_driver(rockchip_isp_mipidphy_driver);
+MODULE_AUTHOR("Rockchip Camera/ISP team");
+MODULE_DESCRIPTION("Rockchip MIPI DPHY driver");
+MODULE_LICENSE("Dual BSD/GPL");
-- 
2.15.1

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