Re: [PATCH v6 04/17] media: rkisp1: add Rockchip MIPI Synopsys DPHY driver
From: Tomasz Figa
Date: Mon Mar 11 2019 - 05:37:39 EST
Hi Laurent,
On Mon, Mar 11, 2019 at 2:49 AM Laurent Pinchart
<laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
>
> Hi Jacob,
>
> A few more comments on the code this time.
>
> First of all, this has bit-rotten a bit and doesn't compile. The
> following patch fixes it. Feel free to squash it into this patch (no
> need to credit me or add my SoB line).
Thanks a lot.
-Jacob, who's not working on this driver anymore.
+èåä (William), who's been looking into reviving this series.
>
> commit 297399bb5e3ac8d50f27f1c911fe7e5f26983e56
> Author: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Date: Sat Mar 2 02:18:19 2019 +0200
>
> media: rkisp1: Fix compilation errors
>
> The code has bit-rotten since March 2018, fix compilation errors.
>
> The new V4L2 async notifier API requires notifiers to be initialized by
> a call to v4l2_async_notifier_init() before being used, do so.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
>
> diff --git a/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c b/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c
> index 32140960557a..8a7d070314c9 100644
> --- a/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c
> +++ b/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c
> @@ -697,7 +697,7 @@ static int rockchip_mipidphy_fwnode_parse(struct device *dev,
> container_of(asd, struct sensor_async_subdev, asd);
> struct v4l2_mbus_config *config = &s_asd->mbus;
>
> - if (vep->bus_type != V4L2_MBUS_CSI2) {
> + if (vep->bus_type != V4L2_MBUS_CSI2_DPHY) {
> dev_err(dev, "Only CSI2 bus type is currently supported\n");
> return -EINVAL;
> }
> @@ -707,7 +707,7 @@ static int rockchip_mipidphy_fwnode_parse(struct device *dev,
> return -EINVAL;
> }
>
> - config->type = V4L2_MBUS_CSI2;
> + config->type = V4L2_MBUS_CSI2_DPHY;
> config->flags = vep->bus.mipi_csi2.flags;
> s_asd->lanes = vep->bus.mipi_csi2.num_data_lanes;
>
> @@ -745,6 +745,8 @@ static int rockchip_mipidphy_media_init(struct mipidphy_priv *priv)
> if (ret < 0)
> return ret;
>
> + v4l2_async_notifier_init(&priv->notifier);
> +
> ret = v4l2_async_notifier_parse_fwnode_endpoints_by_port(
> priv->dev, &priv->notifier,
> sizeof(struct sensor_async_subdev), 0,
> @@ -752,7 +754,7 @@ static int rockchip_mipidphy_media_init(struct mipidphy_priv *priv)
> if (ret < 0)
> return ret;
>
> - if (!priv->notifier.num_subdevs)
> + if (list_empty(&priv->notifier.asd_list))
> return -ENODEV; /* no endpoint */
>
> priv->sd.subdev_notifier = &priv->notifier;
>
>
> Then, please see below for additional comments.
>
> On Thu, Mar 08, 2018 at 05:47:54PM +0800, Jacob Chen wrote:
> > From: Jacob Chen <jacob2.chen@xxxxxxxxxxxxxx>
> >
> > This commit adds a subdev driver for Rockchip MIPI Synopsys DPHY driver
> >
> > Signed-off-by: Jacob Chen <jacob2.chen@xxxxxxxxxxxxxx>
> > Signed-off-by: Shunqian Zheng <zhengsq@xxxxxxxxxxxxxx>
> > Signed-off-by: Tomasz Figa <tfiga@xxxxxxxxxxxx>
> > ---
> > .../media/platform/rockchip/isp1/mipi_dphy_sy.c | 868 +++++++++++++++++++++
> > .../media/platform/rockchip/isp1/mipi_dphy_sy.h | 15 +
> > 2 files changed, 883 insertions(+)
> > create mode 100644 drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c
> > create mode 100644 drivers/media/platform/rockchip/isp1/mipi_dphy_sy.h
> >
> > 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..32140960557a
> > --- /dev/null
> > +++ b/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c
> > @@ -0,0 +1,868 @@
> > +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> > +/*
> > + * Rockchip MIPI Synopsys DPHY driver
> > + *
> > + * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
> > + */
> > +
> > +#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
> > +
> > +/*
> > + * CSI HOST
> > + */
> > +#define CSIHOST_PHY_TEST_CTRL0 0x30
> > +#define CSIHOST_PHY_TEST_CTRL1 0x34
> > +#define CSIHOST_PHY_SHUTDOWNZ 0x08
> > +#define CSIHOST_DPHY_RSTZ 0x0c
> > +
> > +#define PHY_TESTEN_ADDR (0x1 << 16)
> > +#define PHY_TESTEN_DATA (0x0 << 16)
> > +#define PHY_TESTCLK (0x1 << 1)
> > +#define PHY_TESTCLR (0x1 << 0)
> > +#define THS_SETTLE_COUNTER_THRESHOLD 0x04
> > +
> > +#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 mipidphy_priv;
> > +
> > +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];
>
> Should we really hardcode the maximum number of sensors ? Wouldn't it be
> better to allocate this dynamically ?
>
> > + int num_sensors;
> > + bool is_streaming;
> > + void __iomem *txrx_base_addr;
> > + int (*stream_on)(struct mipidphy_priv *priv, struct v4l2_subdev *sd);
> > +};
> > +
> > +static inline struct mipidphy_priv *to_dphy_priv(struct v4l2_subdev *subdev)
> > +{
> > + return container_of(subdev, struct mipidphy_priv, sd);
> > +}
> > +
> > +static inline void write_grf_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 mipidphy0_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_grf_reg(priv, GRF_DPHY_RX0_TESTCLK, 1);
> > + write_grf_reg(priv, GRF_DPHY_RX0_TESTDIN, test_code);
> > + write_grf_reg(priv, GRF_DPHY_RX0_TESTEN, 1);
> > + write_grf_reg(priv, GRF_DPHY_RX0_TESTCLK, 0);
> > + write_grf_reg(priv, GRF_DPHY_RX0_TESTEN, 0);
> > + write_grf_reg(priv, GRF_DPHY_RX0_TESTDIN, test_data);
> > + write_grf_reg(priv, GRF_DPHY_RX0_TESTCLK, 1);
> > +}
> > +
> > +static void mipidphy1_wr_reg(struct mipidphy_priv *priv, unsigned char addr,
> > + unsigned char data)
> > +{
> > + /*
> > + * TESTEN =1,TESTDIN=addr
> > + * TESTCLK=0
> > + * TESTEN =0,TESTDIN=data
> > + * TESTCLK=1
> > + */
> > + writel((PHY_TESTEN_ADDR | addr),
> > + priv->txrx_base_addr + CSIHOST_PHY_TEST_CTRL1);
> > + writel(0x00, priv->txrx_base_addr + CSIHOST_PHY_TEST_CTRL0);
> > + writel((PHY_TESTEN_DATA | data),
> > + priv->txrx_base_addr + CSIHOST_PHY_TEST_CTRL1);
> > + writel(PHY_TESTCLK, priv->txrx_base_addr + CSIHOST_PHY_TEST_CTRL0);
> > +}
> > +
> > +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);
>
> You could call this at the beginning of mipidphy_s_stream_start() and
> pass the sensor pointer to mipidphy_get_sensor_data_rate() and the
> .stream_on() operations to avoid multiple costly lookups, or possibly
> cache it in the mipidphy_priv structure (in that case I'd reset it to
> NULL at stream off time).
>
> > +}
> > +
> > +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);
>
> The correct control for this is V4L2_CID_PIXEL_RATE. You will have to
> divide it by the number of lanes to get the data rate per lane, but
> there will be no need to multiply it by 2 as below.
>
> > + 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);
> > + int ret = 0;
> > +
> > + if (priv->is_streaming)
> > + return 0;
> > +
> > + ret = mipidphy_get_sensor_data_rate(sd);
> > + if (ret < 0)
> > + return ret;
> > +
> > + priv->stream_on(priv, sd);
> > +
> > + priv->is_streaming = true;
> > +
> > + return 0;
> > +}
> > +
> > +static int mipidphy_s_stream_stop(struct v4l2_subdev *sd)
> > +{
> > + struct mipidphy_priv *priv = to_dphy_priv(sd);
> > +
> > + 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;
> > +}
>
> This seems like a hack :-(
>
> > +
> > +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);
>
> It's userspace responsibility to propagate formats through the pipeline
> when using the MC API, you shouldn't access the format of the source
> subdev in this driver.
>
> > +}
> > +
> > +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 int mipidphy_rx_stream_on(struct mipidphy_priv *priv,
> > + struct v4l2_subdev *sd)
> > +{
> > + struct v4l2_subdev *sensor_sd = get_remote_sensor(sd);
> > + struct mipidphy_sensor *sensor = sd_to_sensor(priv, sensor_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;
> > + int i, hsfreq = 0;
> > +
> > + 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_grf_reg(priv, GRF_CON_ISP_DPHY_SEL, 0);
> > + write_grf_reg(priv, GRF_DPHY_RX0_FORCERXMODE, 0);
> > + write_grf_reg(priv, GRF_DPHY_RX0_FORCETXSTOPMODE, 0);
> > + /* Disable lan turn around, which is ignored in receive mode */
> > + write_grf_reg(priv, GRF_DPHY_RX0_TURNREQUEST, 0);
> > + write_grf_reg(priv, GRF_DPHY_RX0_TURNDISABLE, 0xf);
> > +
> > + write_grf_reg(priv, GRF_DPHY_RX0_ENABLE, GENMASK(sensor->lanes - 1, 0));
> > +
> > + /* dphy start */
> > + write_grf_reg(priv, GRF_DPHY_RX0_TESTCLK, 1);
> > + write_grf_reg(priv, GRF_DPHY_RX0_TESTCLR, 1);
> > + usleep_range(100, 150);
> > + write_grf_reg(priv, GRF_DPHY_RX0_TESTCLR, 0);
> > + usleep_range(100, 150);
> > +
> > + /* set clock lane */
> > + /* HS hsfreq_range & lane 0 settle bypass */
> > + mipidphy0_wr_reg(priv, CLOCK_LANE_HS_RX_CONTROL, 0);
> > + /* HS RX Control of lane0 */
> > + mipidphy0_wr_reg(priv, LANE0_HS_RX_CONTROL, hsfreq << 1);
> > + /* HS RX Control of lane1 */
> > + mipidphy0_wr_reg(priv, LANE1_HS_RX_CONTROL, 0);
> > + /* HS RX Control of lane2 */
> > + mipidphy0_wr_reg(priv, LANE2_HS_RX_CONTROL, 0);
> > + /* HS RX Control of lane3 */
> > + mipidphy0_wr_reg(priv, LANE3_HS_RX_CONTROL, 0);
> > + /* HS RX Data Lanes Settle State Time Control */
> > + mipidphy0_wr_reg(priv, HS_RX_DATA_LANES_THS_SETTLE_CONTROL,
> > + THS_SETTLE_COUNTER_THRESHOLD);
> > +
> > + /* Normal operation */
> > + mipidphy0_wr_reg(priv, 0x0, 0);
> > +
> > + return 0;
> > +}
> > +
> > +static int mipidphy_txrx_stream_on(struct mipidphy_priv *priv,
> > + struct v4l2_subdev *sd)
> > +{
> > + struct v4l2_subdev *sensor_sd = get_remote_sensor(sd);
> > + struct mipidphy_sensor *sensor = sd_to_sensor(priv, sensor_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;
> > + int i, hsfreq = 0;
> > +
> > + 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_grf_reg(priv, GRF_CON_ISP_DPHY_SEL, 1);
> > + write_grf_reg(priv, GRF_DSI_CSI_TESTBUS_SEL, 1);
> > + write_grf_reg(priv, GRF_DPHY_RX1_SRC_SEL, 1);
> > + write_grf_reg(priv, GRF_DPHY_TX1RX1_MASTERSLAVEZ, 0);
> > + write_grf_reg(priv, GRF_DPHY_TX1RX1_BASEDIR, 1);
> > + /* Disable lan turn around, which is ignored in receive mode */
> > + write_grf_reg(priv, GRF_DPHY_TX1RX1_FORCERXMODE, 0);
> > + write_grf_reg(priv, GRF_DPHY_TX1RX1_FORCETXSTOPMODE, 0);
> > + write_grf_reg(priv, GRF_DPHY_TX1RX1_TURNREQUEST, 0);
> > + write_grf_reg(priv, GRF_DPHY_TX1RX1_TURNDISABLE, 0xf);
> > + write_grf_reg(priv, GRF_DPHY_TX1RX1_ENABLE,
> > + GENMASK(sensor->lanes - 1, 0));
> > + /* dphy start */
> > + writel(0, priv->txrx_base_addr + CSIHOST_PHY_SHUTDOWNZ);
> > + writel(0, priv->txrx_base_addr + CSIHOST_DPHY_RSTZ);
> > + writel(PHY_TESTCLK, priv->txrx_base_addr + CSIHOST_PHY_TEST_CTRL0);
> > + writel(PHY_TESTCLR, priv->txrx_base_addr + CSIHOST_PHY_TEST_CTRL0);
> > + usleep_range(100, 150);
> > + writel(PHY_TESTCLK, priv->txrx_base_addr + CSIHOST_PHY_TEST_CTRL0);
> > + usleep_range(100, 150);
> > +
> > + /* set clock lane */
> > + mipidphy1_wr_reg(priv, CLOCK_LANE_HS_RX_CONTROL, 0);
> > + mipidphy1_wr_reg(priv, LANE0_HS_RX_CONTROL, hsfreq << 1);
> > + mipidphy1_wr_reg(priv, LANE1_HS_RX_CONTROL, 0);
> > + mipidphy1_wr_reg(priv, LANE2_HS_RX_CONTROL, 0);
> > + mipidphy1_wr_reg(priv, LANE3_HS_RX_CONTROL, 0);
> > + /* HS RX Data Lanes Settle State Time Control */
> > + mipidphy1_wr_reg(priv, HS_RX_DATA_LANES_THS_SETTLE_CONTROL,
> > + THS_SETTLE_COUNTER_THRESHOLD);
> > +
> > + /* Normal operation */
> > + mipidphy1_wr_reg(priv, 0x0, 0);
> > +
> > + return 0;
> > +}
> > +
> > +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);
>
> You can mode this just above the probe function to group it with the
> code that uses it.
>
> > +
> > +/* 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;
> > + struct resource *res;
> > + 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)) {
> > + grf = syscon_regmap_lookup_by_phandle(dev->of_node,
> > + "rockchip,grf");
> > + 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;
> > + priv->stream_on = mipidphy_txrx_stream_on;
> > + priv->txrx_base_addr = NULL;
> > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > + priv->txrx_base_addr = devm_ioremap_resource(dev, res);
>
> This will result in an error being printed to the kernel log if res is
> NULL. The following (untested) code should fix it.
>
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> if (res) {
> priv->txrx_base_addr = devm_ioremap_resource(dev, res);
> if (IS_ERR(priv->txrx_base_addr))
> return PTR_ERR(priv->txrx_base_addr);
>
> priv->stream_on = mipidphy_txrx_stream_on;
> } else {
> priv->txrx_base_addr = NULL;
> priv->stream_on = mipidphy_rx_stream_on;
> }
>
> Furthermore, txrx_base_addr seems to be used to access the CSIHOST
> registers, part of the CSI-2 receiver (CSI host in the system connection
> description of the RK3288 datasheet, in the MIPI CSI PHY section), not
> the PHY itself. I'm afraid you'll have to redesign this to split the
> code between those two components. One option would be to have a CSI
> host DT node with a reg resource for the CSIHOST registers, modeled as a
> V4L2 subdev, and pointing to the DPHY using a phy-handle property. In
> the rkisp1 driver, I would then extract the CSI-2 receiver code to a
> separate subdev, and handle the PHY from that subdev, also with a
> phy-handle property in the rkisp1 DT node.
>
> > + if (IS_ERR(priv->txrx_base_addr))
> > + priv->stream_on = mipidphy_rx_stream_on;
> > +
> > + 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,
>
> Too much indentation.
>
> > + },
> > +};
> > +
> > +module_platform_driver(rockchip_isp_mipidphy_driver);
>
> dev.c also has a module_platform_driver(). As both are compiled in the
> same module, this results in a link error when compiling the drivers as
> a module. I would recommend separating it into two modules to fix this.
>
> > +MODULE_AUTHOR("Rockchip Camera/ISP team");
> > +MODULE_DESCRIPTION("Rockchip MIPI DPHY driver");
> > +MODULE_LICENSE("Dual BSD/GPL");
> > diff --git a/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.h b/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.h
> > new file mode 100644
> > index 000000000000..c558791064a2
> > --- /dev/null
> > +++ b/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.h
> > @@ -0,0 +1,15 @@
> > +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> > +/*
> > + * Rockchip MIPI Synopsys DPHY driver
> > + *
> > + * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
> > + */
> > +
> > +#ifndef __MIPI_DPHY_SY_H__
> > +#define __MIPI_DPHY_SY_H__
> > +
> > +#include <media/v4l2-subdev.h>
> > +
> > +void rkisp1_set_mipi_dphy_sy_lanes(struct v4l2_subdev *dphy, int lanes);
>
> This function doesn't seem to be used or defined anywhere, you can drop
> this file.
>
> > +
> > +#endif /* __RKISP1_MIPI_DPHY_SY_H__ */
>
> --
> Regards,
>
> Laurent Pinchart