From patchwork Wed May 14 15:41:08 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Riesch via B4 Relay X-Patchwork-Id: 890068 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CB83527A92A; Wed, 14 May 2025 15:53:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747237983; cv=none; b=bdTBqQasDsmQvoUxt7EX6OP7t3080fQrggd84voG1XpiXSS9hN97eIwX/ygzpiJ+oUTSo2xpJ6IjN+VB7WYHqMS4RWgEWtSEROpXhKPQgOrraHctghapw5f6RRuZqTSdKVRG5dR3vF/enU3DjnFERaC0Nn8NHu7UprszJ310SZY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747237983; c=relaxed/simple; bh=FZRCNfzR1dt4GdUs3QJlk7AzufGzJai5j6zoM3nUCus=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=a1bMcTQEwNmhqO5afOgYgc2bSSUkIkhORJRZelOz9zcViO1L6a/wLYo81BV4c1EKqY17iPCEHzaTg4aH6B17J4ViF/fKiayQ9DkSZpbrkgxvYgAO2rKh6j6Euo0oDxWhRdTpUJGTtmrmvUZ2daZ+ayEW32CkCgRDwg/+3lWSHDA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DfzcvJnC; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DfzcvJnC" Received: by smtp.kernel.org (Postfix) with ESMTPS id 30B43C4CEFC; Wed, 14 May 2025 15:53:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1747237983; bh=FZRCNfzR1dt4GdUs3QJlk7AzufGzJai5j6zoM3nUCus=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=DfzcvJnCatVOfo7/wFiJ2OYynWzKlDfSJfgjoR5JNhY+C/WsqXBnsPze4C1kTnM0X pnJOJlsx8UFlRbZkEZn71j3pKDJVIs6rY7ggBrTABq0IihdtRRgJOyvRilkMiPX6Nv RlHz37jaeNnfJQUiVU7hSBBk2YAEKE0NphagSoQS6UhQm0r2zbTHj66bLs1eZsj1ik nCNh8t2H4gBTtfz36zwt1pKUfCDrX4JyUoIjoJS9Epns4E2MXyE0Gnlr7ogQmLPV+H k5Jz6nvwerSNrIcXl1kn1Vb/+mI4e9M6yGAnhd5jncc7ONN+rSajyREOF3TJLGlFyP 2miBSTEwNF+5w== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 25142C54754; Wed, 14 May 2025 15:53:03 +0000 (UTC) From: Michael Riesch via B4 Relay Date: Wed, 14 May 2025 17:41:08 +0200 Subject: [PATCH v7 07/14] media: rockchip: add driver for mipi csi-2 receiver Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240220-rk3568-vicap-v7-7-7581fd96a33a@collabora.com> References: <20240220-rk3568-vicap-v7-0-7581fd96a33a@collabora.com> In-Reply-To: <20240220-rk3568-vicap-v7-0-7581fd96a33a@collabora.com> To: Mehdi Djait , Maxime Chevallier , =?utf-8?q?Th=C3=A9o_Leb?= =?utf-8?q?run?= , Thomas Petazzoni , Gerald Loacker , Bryan O'Donoghue , Markus Elfring , Laurent Pinchart , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Kever Yang , Nicolas Dufresne , Sebastian Reichel , Collabora Kernel Team , Paul Kocialkowski , Alexander Shiyan , Val Packett , Rob Herring , Philipp Zabel , Sakari Ailus Cc: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, Michael Riesch , Michael Riesch X-Mailer: b4 0.12.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747237265; l=22440; i=michael.riesch@collabora.com; s=20250410; h=from:subject:message-id; bh=q4gYrbkrI8ULVmUgERCXaByA52E6pQrsGq5TYaMxyUE=; b=HfL3YZQ3T1GfnEo+RSZyhcUg77FUvHeBf/4UC5bfU+K6Vh6lf0hqc9QPNAUmo7eNXUjf84rAg 8lRiA5A3VAADNxhoQdQfq4hNt8dsNTrkaISSq2bCXzjt/3UivaaXD5Y X-Developer-Key: i=michael.riesch@collabora.com; a=ed25519; pk=+MWX1fffLFZtTPG/I6XdYm/+OSvpRE8D9evQaWbiN04= X-Endpoint-Received: by B4 Relay for michael.riesch@collabora.com/20250410 with auth_id=371 X-Original-From: Michael Riesch Reply-To: michael.riesch@collabora.com From: Michael Riesch The Rockchip RK3568 MIPI CSI-2 Receiver is a CSI-2 bridge with one input port and one output port. It receives the data with the help of an external MIPI PHY (C-PHY or D-PHY) and passes it to the Rockchip RK3568 Video Capture (VICAP) block. Add a V4L2 subdevice driver for this unit. Signed-off-by: Michael Riesch Signed-off-by: Michael Riesch --- MAINTAINERS | 1 + drivers/media/platform/rockchip/Kconfig | 1 + drivers/media/platform/rockchip/Makefile | 1 + drivers/media/platform/rockchip/rkcsi/Kconfig | 15 + drivers/media/platform/rockchip/rkcsi/Makefile | 3 + drivers/media/platform/rockchip/rkcsi/rkcsi.c | 735 +++++++++++++++++++++++++ 6 files changed, 756 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 6cca9f6a2f0e..68ad7d92d094 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -21043,6 +21043,7 @@ M: Michael Riesch L: linux-media@vger.kernel.org S: Maintained F: Documentation/devicetree/bindings/media/rockchip,rk3568-mipi-csi.yaml +F: drivers/media/platform/rockchip/rkcsi/ ROCKCHIP RK3568 RANDOM NUMBER GENERATOR SUPPORT M: Daniel Golle diff --git a/drivers/media/platform/rockchip/Kconfig b/drivers/media/platform/rockchip/Kconfig index 549f4e9f443e..96b38768c17e 100644 --- a/drivers/media/platform/rockchip/Kconfig +++ b/drivers/media/platform/rockchip/Kconfig @@ -4,4 +4,5 @@ comment "Rockchip media platform drivers" source "drivers/media/platform/rockchip/rga/Kconfig" source "drivers/media/platform/rockchip/rkcif/Kconfig" +source "drivers/media/platform/rockchip/rkcsi/Kconfig" source "drivers/media/platform/rockchip/rkisp1/Kconfig" diff --git a/drivers/media/platform/rockchip/Makefile b/drivers/media/platform/rockchip/Makefile index 6aba32c8830c..932be2d3fdd6 100644 --- a/drivers/media/platform/rockchip/Makefile +++ b/drivers/media/platform/rockchip/Makefile @@ -1,4 +1,5 @@ # SPDX-License-Identifier: GPL-2.0-only obj-y += rga/ obj-y += rkcif/ +obj-y += rkcsi/ obj-y += rkisp1/ diff --git a/drivers/media/platform/rockchip/rkcsi/Kconfig b/drivers/media/platform/rockchip/rkcsi/Kconfig new file mode 100644 index 000000000000..150a5e22eb9e --- /dev/null +++ b/drivers/media/platform/rockchip/rkcsi/Kconfig @@ -0,0 +1,15 @@ +config VIDEO_ROCKCHIP_CSI + tristate "Rockchip MIPI CSI-2 Receiver" + depends on ARCH_ROCKCHIP || COMPILE_TEST + depends on V4L_PLATFORM_DRIVERS + depends on PM && COMMON_CLK + select MEDIA_CONTROLLER + select V4L2_FWNODE + select VIDEO_V4L2_SUBDEV_API + help + This is a driver for Rockchip MIPI CSI-2 Receiver. It is featured + in various Rockchips SoCs, usually in combination with a Video + Capture (VICAP) unit (see Rockchip Camera Interface (CIF) driver). + + To compile this driver as a module, choose M here: the module + will be called rockchip-mipi-csi. diff --git a/drivers/media/platform/rockchip/rkcsi/Makefile b/drivers/media/platform/rockchip/rkcsi/Makefile new file mode 100644 index 000000000000..147712cbb68a --- /dev/null +++ b/drivers/media/platform/rockchip/rkcsi/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_VIDEO_ROCKCHIP_CSI) += rockchip-mipi-csi.o +rockchip-mipi-csi-objs += rkcsi.o diff --git a/drivers/media/platform/rockchip/rkcsi/rkcsi.c b/drivers/media/platform/rockchip/rkcsi/rkcsi.c new file mode 100644 index 000000000000..eaad3608337e --- /dev/null +++ b/drivers/media/platform/rockchip/rkcsi/rkcsi.c @@ -0,0 +1,735 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Rockchip MIPI CSI-2 Receiver Driver + * + * Copyright (C) 2019 Rockchip Electronics Co., Ltd. + * Copyright (C) 2025 Michael Riesch + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#define CSI2HOST_N_LANES 0x04 +#define CSI2HOST_CSI2_RESETN 0x10 +#define CSI2HOST_PHY_STATE 0x14 +#define CSI2HOST_ERR1 0x20 +#define CSI2HOST_ERR2 0x24 +#define CSI2HOST_MSK1 0x28 +#define CSI2HOST_MSK2 0x2c +#define CSI2HOST_CONTROL 0x40 + +#define SW_CPHY_EN(x) ((x) << 0) +#define SW_DSI_EN(x) ((x) << 4) +#define SW_DATATYPE_FS(x) ((x) << 8) +#define SW_DATATYPE_FE(x) ((x) << 14) +#define SW_DATATYPE_LS(x) ((x) << 20) +#define SW_DATATYPE_LE(x) ((x) << 26) + +#define RKCSI_CLKS_MAX 1 + +enum { + RKCSI_PAD_SINK, + RKCSI_PAD_SRC, + RKCSI_PAD_MAX, +}; + +struct rkcsi_format { + u32 code; + u8 depth; + u8 csi_dt; +}; + +struct rkcsi_device { + struct device *dev; + + void __iomem *base_addr; + struct clk_bulk_data *clks; + unsigned int clks_num; + struct phy *phy; + struct reset_control *reset; + + const struct rkcsi_format *formats; + unsigned int formats_num; + + struct media_pad pads[RKCSI_PAD_MAX]; + struct v4l2_async_notifier notifier; + struct v4l2_fwnode_endpoint vep; + struct v4l2_subdev sd; + + struct v4l2_subdev *source_sd; + u32 source_pad; +}; + +static const struct v4l2_mbus_framefmt default_format = { + .width = 3840, + .height = 2160, + .code = MEDIA_BUS_FMT_SRGGB10_1X10, + .field = V4L2_FIELD_NONE, + .colorspace = V4L2_COLORSPACE_RAW, + .ycbcr_enc = V4L2_YCBCR_ENC_601, + .quantization = V4L2_QUANTIZATION_FULL_RANGE, + .xfer_func = V4L2_XFER_FUNC_NONE, +}; + +static const struct rkcsi_format formats[] = { + /* YUV formats */ + { + .code = MEDIA_BUS_FMT_YUYV8_1X16, + .depth = 16, + .csi_dt = MIPI_CSI2_DT_YUV422_8B, + }, + { + .code = MEDIA_BUS_FMT_UYVY8_1X16, + .depth = 16, + .csi_dt = MIPI_CSI2_DT_YUV422_8B, + }, + { + .code = MEDIA_BUS_FMT_YVYU8_1X16, + .depth = 16, + .csi_dt = MIPI_CSI2_DT_YUV422_8B, + }, + { + .code = MEDIA_BUS_FMT_VYUY8_1X16, + .depth = 16, + .csi_dt = MIPI_CSI2_DT_YUV422_8B, + }, + /* RGB formats */ + { + .code = MEDIA_BUS_FMT_RGB888_1X24, + .depth = 24, + .csi_dt = MIPI_CSI2_DT_RGB888, + }, + { + .code = MEDIA_BUS_FMT_BGR888_1X24, + .depth = 24, + .csi_dt = MIPI_CSI2_DT_RGB888, + }, + /* Bayer formats */ + { + .code = MEDIA_BUS_FMT_SBGGR8_1X8, + .depth = 8, + .csi_dt = MIPI_CSI2_DT_RAW8, + }, + { + .code = MEDIA_BUS_FMT_SGBRG8_1X8, + .depth = 8, + .csi_dt = MIPI_CSI2_DT_RAW8, + }, + { + .code = MEDIA_BUS_FMT_SGRBG8_1X8, + .depth = 8, + .csi_dt = MIPI_CSI2_DT_RAW8, + }, + { + .code = MEDIA_BUS_FMT_SRGGB8_1X8, + .depth = 8, + .csi_dt = MIPI_CSI2_DT_RAW8, + }, + { + .code = MEDIA_BUS_FMT_SBGGR10_1X10, + .depth = 10, + .csi_dt = MIPI_CSI2_DT_RAW10, + }, + { + .code = MEDIA_BUS_FMT_SGBRG10_1X10, + .depth = 10, + .csi_dt = MIPI_CSI2_DT_RAW10, + }, + { + .code = MEDIA_BUS_FMT_SGRBG10_1X10, + .depth = 10, + .csi_dt = MIPI_CSI2_DT_RAW10, + }, + { + .code = MEDIA_BUS_FMT_SRGGB10_1X10, + .depth = 10, + .csi_dt = MIPI_CSI2_DT_RAW10, + }, + { + .code = MEDIA_BUS_FMT_SBGGR12_1X12, + .depth = 12, + .csi_dt = MIPI_CSI2_DT_RAW12, + }, + { + .code = MEDIA_BUS_FMT_SGBRG12_1X12, + .depth = 12, + .csi_dt = MIPI_CSI2_DT_RAW12, + }, + { + .code = MEDIA_BUS_FMT_SGRBG12_1X12, + .depth = 12, + .csi_dt = MIPI_CSI2_DT_RAW12, + }, + { + .code = MEDIA_BUS_FMT_SRGGB12_1X12, + .depth = 12, + .csi_dt = MIPI_CSI2_DT_RAW12, + }, +}; + +static inline struct rkcsi_device *to_rkcsi(struct v4l2_subdev *sd) +{ + return container_of(sd, struct rkcsi_device, sd); +} + +static inline __maybe_unused void rkcsi_write(struct rkcsi_device *csi_dev, + unsigned int addr, u32 val) +{ + writel(val, csi_dev->base_addr + addr); +} + +static inline __maybe_unused u32 rkcsi_read(struct rkcsi_device *csi_dev, + unsigned int addr) +{ + return readl(csi_dev->base_addr + addr); +} + +static const struct rkcsi_format * +rkcsi_find_format(struct rkcsi_device *csi_dev, u32 mbus_code) +{ + const struct rkcsi_format *format; + + WARN_ON(csi_dev->formats_num == 0); + + for (int i = 0; i < csi_dev->formats_num; i++) { + format = &csi_dev->formats[i]; + if (format->code == mbus_code) + return format; + } + + return NULL; +} + +static int rkcsi_start(struct rkcsi_device *csi_dev) +{ + struct media_pad *source_pad = + &csi_dev->source_sd->entity.pads[csi_dev->source_pad]; + enum v4l2_mbus_type bus_type = csi_dev->vep.bus_type; + union phy_configure_opts opts; + s64 link_freq; + u32 lanes = csi_dev->vep.bus.mipi_csi2.num_data_lanes; + u32 control = 0; + int ret; + + if (lanes < 1 || lanes > 4) + return -EINVAL; + + /* set mult and div to 0, thus completely rely on V4L2_CID_LINK_FREQ */ + link_freq = v4l2_get_link_freq(source_pad, 0, 0); + if (link_freq <= 0) + return -EINVAL; + + if (bus_type == V4L2_MBUS_CSI2_DPHY) { + struct phy_configure_opts_mipi_dphy *cfg = &opts.mipi_dphy; + + phy_mipi_dphy_get_default_config_for_hsclk(link_freq * 2, lanes, + cfg); + phy_set_mode(csi_dev->phy, PHY_MODE_MIPI_DPHY); + phy_configure(csi_dev->phy, &opts); + + control |= SW_CPHY_EN(0); + + } else if (bus_type == V4L2_MBUS_CSI2_CPHY) { + control |= SW_CPHY_EN(1); + + /* TODO: implement CPHY configuration */ + return -EOPNOTSUPP; + } else { + return -EINVAL; + } + + control |= SW_DATATYPE_FS(0x00) | SW_DATATYPE_FE(0x01) | + SW_DATATYPE_LS(0x02) | SW_DATATYPE_LE(0x03); + + rkcsi_write(csi_dev, CSI2HOST_N_LANES, lanes - 1); + rkcsi_write(csi_dev, CSI2HOST_CONTROL, control); + rkcsi_write(csi_dev, CSI2HOST_CSI2_RESETN, 1); + + ret = phy_power_on(csi_dev->phy); + if (ret) + return ret; + + return 0; +} + +static void rkcsi_stop(struct rkcsi_device *csi_dev) +{ + phy_power_off(csi_dev->phy); + + rkcsi_write(csi_dev, CSI2HOST_CSI2_RESETN, 0); + rkcsi_write(csi_dev, CSI2HOST_MSK1, ~0); + rkcsi_write(csi_dev, CSI2HOST_MSK2, ~0); +} + +static const struct media_entity_operations rkcsi_media_ops = { + .link_validate = v4l2_subdev_link_validate, +}; + +static int rkcsi_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_mbus_code_enum *code) +{ + struct rkcsi_device *csi_dev = to_rkcsi(sd); + + if (code->pad == RKCSI_PAD_SRC) { + const struct v4l2_mbus_framefmt *sink_fmt; + + if (code->index) + return -EINVAL; + + sink_fmt = v4l2_subdev_state_get_format(sd_state, + RKCSI_PAD_SINK); + code->code = sink_fmt->code; + + return 0; + } else if (code->pad == RKCSI_PAD_SINK) { + if (code->index > csi_dev->formats_num) + return -EINVAL; + + code->code = csi_dev->formats[code->index].code; + return 0; + } + + return -EINVAL; +} + +static int rkcsi_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_format *format) +{ + struct rkcsi_device *csi_dev = to_rkcsi(sd); + const struct rkcsi_format *fmt; + struct v4l2_mbus_framefmt *sink, *src; + + /* the format on the source pad always matches the sink pad */ + if (format->pad == RKCSI_PAD_SRC) + return v4l2_subdev_get_fmt(sd, state, format); + + sink = v4l2_subdev_state_get_format(state, format->pad, format->stream); + if (!sink) + return -EINVAL; + + fmt = rkcsi_find_format(csi_dev, format->format.code); + if (fmt) + *sink = format->format; + else + *sink = default_format; + + /* propagate the format to the source pad */ + src = v4l2_subdev_state_get_opposite_stream_format(state, format->pad, + format->stream); + if (!src) + return -EINVAL; + + *src = *sink; + + return 0; +} + +static int rkcsi_set_routing(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + enum v4l2_subdev_format_whence which, + struct v4l2_subdev_krouting *routing) +{ + int ret; + + ret = v4l2_subdev_routing_validate(sd, routing, + V4L2_SUBDEV_ROUTING_ONLY_1_TO_1); + if (ret) + return ret; + + ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing, + &default_format); + if (ret) + return ret; + + return 0; +} + +static int rkcsi_enable_streams(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, u32 pad, + u64 streams_mask) +{ + struct rkcsi_device *csi_dev = to_rkcsi(sd); + struct v4l2_subdev *remote_sd; + struct media_pad *sink_pad, *remote_pad; + struct device *dev = csi_dev->dev; + u64 mask; + int ret; + + sink_pad = &sd->entity.pads[RKCSI_PAD_SINK]; + remote_pad = media_pad_remote_pad_first(sink_pad); + remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity); + + mask = v4l2_subdev_state_xlate_streams(state, RKCSI_PAD_SINK, + RKCSI_PAD_SRC, &streams_mask); + + ret = pm_runtime_resume_and_get(dev); + if (ret) + goto err; + + ret = rkcsi_start(csi_dev); + if (ret) { + dev_err(dev, "failed to enable CSI hardware\n"); + goto err_pm_runtime_put; + } + + ret = v4l2_subdev_enable_streams(remote_sd, remote_pad->index, mask); + if (ret) + goto err_csi_stop; + + return 0; + +err_csi_stop: + rkcsi_stop(csi_dev); +err_pm_runtime_put: + pm_runtime_put_sync(dev); +err: + return ret; +} + +static int rkcsi_disable_streams(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, u32 pad, + u64 streams_mask) +{ + struct rkcsi_device *csi_dev = to_rkcsi(sd); + struct v4l2_subdev *remote_sd; + struct media_pad *sink_pad, *remote_pad; + struct device *dev = csi_dev->dev; + u64 mask; + int ret; + + sink_pad = &sd->entity.pads[RKCSI_PAD_SINK]; + remote_pad = media_pad_remote_pad_first(sink_pad); + remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity); + + mask = v4l2_subdev_state_xlate_streams(state, RKCSI_PAD_SINK, + RKCSI_PAD_SRC, &streams_mask); + + ret = v4l2_subdev_disable_streams(remote_sd, remote_pad->index, mask); + + rkcsi_stop(csi_dev); + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return ret; +} + +static const struct v4l2_subdev_pad_ops rkcsi_pad_ops = { + .enum_mbus_code = rkcsi_enum_mbus_code, + .get_fmt = v4l2_subdev_get_fmt, + .set_fmt = rkcsi_set_fmt, + .set_routing = rkcsi_set_routing, + .enable_streams = rkcsi_enable_streams, + .disable_streams = rkcsi_disable_streams, +}; + +static const struct v4l2_subdev_ops rkcsi_ops = { + .pad = &rkcsi_pad_ops, +}; + +static int rkcsi_init_state(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state) +{ + struct v4l2_subdev_route routes[] = { + { + .sink_pad = RKCSI_PAD_SINK, + .sink_stream = 0, + .source_pad = RKCSI_PAD_SRC, + .source_stream = 0, + .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE, + }, + }; + struct v4l2_subdev_krouting routing = { + .len_routes = ARRAY_SIZE(routes), + .num_routes = ARRAY_SIZE(routes), + .routes = routes, + }; + int ret; + + ret = v4l2_subdev_set_routing_with_fmt(sd, state, &routing, + &default_format); + + return ret; +} + +static const struct v4l2_subdev_internal_ops rkcsi_internal_ops = { + .init_state = rkcsi_init_state, +}; + +static int rkcsi_notifier_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *sd, + struct v4l2_async_connection *asd) +{ + struct rkcsi_device *csi_dev = + container_of(notifier, struct rkcsi_device, notifier); + int source_pad; + + source_pad = media_entity_get_fwnode_pad(&sd->entity, sd->fwnode, + MEDIA_PAD_FL_SOURCE); + if (source_pad < 0) { + dev_err(csi_dev->dev, "failed to find source pad for %s\n", + sd->name); + return source_pad; + } + + csi_dev->source_sd = sd; + csi_dev->source_pad = source_pad; + + return media_create_pad_link(&sd->entity, source_pad, + &csi_dev->sd.entity, RKCSI_PAD_SINK, + MEDIA_LNK_FL_ENABLED); +} + +static const struct v4l2_async_notifier_operations rkcsi_notifier_ops = { + .bound = rkcsi_notifier_bound, +}; + +static int rkcsi_register_notifier(struct rkcsi_device *csi_dev) +{ + struct v4l2_async_connection *asd; + struct v4l2_async_notifier *ntf = &csi_dev->notifier; + struct v4l2_fwnode_endpoint *vep = &csi_dev->vep; + struct v4l2_subdev *sd = &csi_dev->sd; + struct device *dev = csi_dev->dev; + struct fwnode_handle *ep; + int ret = 0; + + ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, 0); + if (!ep) + return dev_err_probe(dev, -ENODEV, "failed to get endpoint\n"); + + vep->bus_type = V4L2_MBUS_UNKNOWN; + ret = v4l2_fwnode_endpoint_parse(ep, vep); + if (ret) { + ret = dev_err_probe(dev, ret, "failed to parse endpoint\n"); + goto out; + } + + if (vep->bus_type != V4L2_MBUS_CSI2_DPHY && + vep->bus_type != V4L2_MBUS_CSI2_CPHY) { + ret = dev_err_probe(dev, -EINVAL, + "invalid bus type of endpoint\n"); + goto out; + } + + v4l2_async_subdev_nf_init(ntf, sd); + ntf->ops = &rkcsi_notifier_ops; + + asd = v4l2_async_nf_add_fwnode_remote(ntf, ep, + struct v4l2_async_connection); + if (IS_ERR(asd)) { + ret = PTR_ERR(asd); + goto err_nf_cleanup; + } + + ret = v4l2_async_nf_register(ntf); + if (ret) { + ret = dev_err_probe(dev, ret, "failed to register notifier\n"); + goto err_nf_cleanup; + } + + goto out; + +err_nf_cleanup: + v4l2_async_nf_cleanup(ntf); +out: + fwnode_handle_put(ep); + return ret; +} + +static int rkcsi_register(struct rkcsi_device *csi_dev) +{ + struct media_pad *pads = csi_dev->pads; + struct v4l2_subdev *sd = &csi_dev->sd; + int ret; + + ret = rkcsi_register_notifier(csi_dev); + if (ret) + goto err; + + v4l2_subdev_init(sd, &rkcsi_ops); + sd->dev = csi_dev->dev; + sd->entity.ops = &rkcsi_media_ops; + sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE; + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_STREAMS; + sd->internal_ops = &rkcsi_internal_ops; + sd->owner = THIS_MODULE; + snprintf(sd->name, sizeof(sd->name), "rockchip-mipi-csi %s", + dev_name(csi_dev->dev)); + + pads[RKCSI_PAD_SINK].flags = MEDIA_PAD_FL_SINK | + MEDIA_PAD_FL_MUST_CONNECT; + pads[RKCSI_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_pads_init(&sd->entity, RKCSI_PAD_MAX, pads); + if (ret) + goto err_notifier_unregister; + + ret = v4l2_subdev_init_finalize(sd); + if (ret) + goto err_entity_cleanup; + + ret = v4l2_async_register_subdev(sd); + if (ret) { + dev_err(sd->dev, "failed to register CSI subdev\n"); + goto err_subdev_cleanup; + } + + return 0; + +err_subdev_cleanup: + v4l2_subdev_cleanup(sd); +err_entity_cleanup: + media_entity_cleanup(&sd->entity); +err_notifier_unregister: + v4l2_async_nf_unregister(&csi_dev->notifier); + v4l2_async_nf_cleanup(&csi_dev->notifier); +err: + return ret; +} + +static void rkcsi_unregister(struct rkcsi_device *csi_dev) +{ + struct v4l2_subdev *sd = &csi_dev->sd; + + v4l2_async_unregister_subdev(sd); + v4l2_subdev_cleanup(sd); + media_entity_cleanup(&sd->entity); + v4l2_async_nf_unregister(&csi_dev->notifier); + v4l2_async_nf_cleanup(&csi_dev->notifier); +} + +static const struct of_device_id rkcsi_of_match[] = { + { + .compatible = "rockchip,rk3568-mipi-csi", + }, + {} +}; +MODULE_DEVICE_TABLE(of, rkcsi_of_match); + +static int rkcsi_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct rkcsi_device *csi_dev; + int ret; + + csi_dev = devm_kzalloc(dev, sizeof(*csi_dev), GFP_KERNEL); + if (!csi_dev) + return -ENOMEM; + csi_dev->dev = dev; + dev_set_drvdata(dev, csi_dev); + + csi_dev->base_addr = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(csi_dev->base_addr)) + return PTR_ERR(csi_dev->base_addr); + + ret = devm_clk_bulk_get_all(dev, &csi_dev->clks); + if (ret != RKCSI_CLKS_MAX) + return dev_err_probe(dev, -ENODEV, "failed to get clocks\n"); + csi_dev->clks_num = ret; + + csi_dev->phy = devm_phy_get(dev, NULL); + if (IS_ERR(csi_dev->phy)) + return dev_err_probe(dev, PTR_ERR(csi_dev->phy), + "failed to get MIPI CSI PHY\n"); + + csi_dev->reset = devm_reset_control_array_get_exclusive(dev); + if (IS_ERR(csi_dev->reset)) + return dev_err_probe(dev, PTR_ERR(csi_dev->reset), + "failed to get reset\n"); + + csi_dev->formats = formats; + csi_dev->formats_num = ARRAY_SIZE(formats); + + pm_runtime_enable(dev); + + ret = phy_init(csi_dev->phy); + if (ret) { + ret = dev_err_probe(dev, ret, + "failed to initialize MIPI CSI PHY\n"); + goto err_pm_runtime_disable; + } + + ret = rkcsi_register(csi_dev); + if (ret) + goto err_phy_exit; + + return 0; + +err_phy_exit: + phy_exit(csi_dev->phy); +err_pm_runtime_disable: + pm_runtime_disable(dev); + return ret; +} + +static void rkcsi_remove(struct platform_device *pdev) +{ + struct rkcsi_device *csi_dev = platform_get_drvdata(pdev); + struct device *dev = &pdev->dev; + + rkcsi_unregister(csi_dev); + phy_exit(csi_dev->phy); + pm_runtime_disable(dev); +} + +static int rkcsi_runtime_suspend(struct device *dev) +{ + struct rkcsi_device *csi_dev = dev_get_drvdata(dev); + + clk_bulk_disable_unprepare(csi_dev->clks_num, csi_dev->clks); + + return 0; +} + +static int rkcsi_runtime_resume(struct device *dev) +{ + struct rkcsi_device *csi_dev = dev_get_drvdata(dev); + int ret; + + reset_control_assert(csi_dev->reset); + udelay(5); + reset_control_deassert(csi_dev->reset); + + ret = clk_bulk_prepare_enable(csi_dev->clks_num, csi_dev->clks); + if (ret) { + dev_err(dev, "failed to enable clocks\n"); + return ret; + } + + return 0; +} + +static const struct dev_pm_ops rkcsi_pm_ops = { + .runtime_suspend = rkcsi_runtime_suspend, + .runtime_resume = rkcsi_runtime_resume, +}; + +static struct platform_driver rkcsi_drv = { + .driver = { + .name = "rockchip-mipi-csi", + .of_match_table = rkcsi_of_match, + .pm = &rkcsi_pm_ops, + }, + .probe = rkcsi_probe, + .remove = rkcsi_remove, +}; +module_platform_driver(rkcsi_drv); + +MODULE_DESCRIPTION("Rockchip MIPI CSI-2 Receiver platform driver"); +MODULE_LICENSE("GPL");