This add the media entity subdevice and control driver for the i.MX7
CMOS Sensor Interface.
Signed-off-by: Rui Miguel Silva <rui.silva@xxxxxxxxxx>
---
drivers/staging/media/imx/Kconfig | 9 +-
drivers/staging/media/imx/Makefile | 2 +
drivers/staging/media/imx/imx7-media-csi.c | 1365 ++++++++++++++++++++
3 files changed, 1375 insertions(+), 1 deletion(-)
create mode 100644 drivers/staging/media/imx/imx7-media-csi.c
diff --git a/drivers/staging/media/imx/Kconfig b/drivers/staging/media/imx/Kconfig
index bfc17de56b17..36b276ea2ecc 100644
--- a/drivers/staging/media/imx/Kconfig
+++ b/drivers/staging/media/imx/Kconfig
@@ -11,7 +11,7 @@ config VIDEO_IMX_MEDIA
driver for the i.MX5/6 SOC.
if VIDEO_IMX_MEDIA
-menu "i.MX5/6 Media Sub devices"
+menu "i.MX5/6/7 Media Sub devices"
config VIDEO_IMX_CSI
tristate "i.MX5/6 Camera Sensor Interface driver"
@@ -20,5 +20,12 @@ config VIDEO_IMX_CSI
---help---
A video4linux camera sensor interface driver for i.MX5/6.
+config VIDEO_IMX7_CSI
+ tristate "i.MX7 Camera Sensor Interface driver"
+ depends on VIDEO_IMX_MEDIA && VIDEO_DEV && I2C
+ default y
+ help
+ Enable support for video4linux camera sensor interface driver for
+ i.MX7.
endmenu
endif
diff --git a/drivers/staging/media/imx/Makefile b/drivers/staging/media/imx/Makefile
index a30b3033f9a3..074f016d3519 100644
--- a/drivers/staging/media/imx/Makefile
+++ b/drivers/staging/media/imx/Makefile
@@ -12,3 +12,5 @@ obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx-media-ic.o
obj-$(CONFIG_VIDEO_IMX_CSI) += imx-media-csi.o
obj-$(CONFIG_VIDEO_IMX_CSI) += imx6-mipi-csi2.o
+
+obj-$(CONFIG_VIDEO_IMX7_CSI) += imx7-media-csi.o
diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c
new file mode 100644
index 000000000000..d5154f032979
--- /dev/null
+++ b/drivers/staging/media/imx/imx7-media-csi.c
@@ -0,0 +1,1365 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * V4L2 Capture CSI Subdev for Freescale i.MX7 SOC
+ *
+ * Copyright (c) 2019 Linaro Ltd
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gcd.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-mc.h>
+#include <media/v4l2-subdev.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include <media/imx.h>
+#include "imx-media.h"
+
+#define IMX7_CSI_PAD_SINK 0
+#define IMX7_CSI_PAD_SRC 1
+#define IMX7_CSI_PADS_NUM 2
+
+/* reset values */
+#define CSICR1_RESET_VAL 0x40000800
+#define CSICR2_RESET_VAL 0x0
+#define CSICR3_RESET_VAL 0x0
+
+/* csi control reg 1 */
+#define BIT_SWAP16_EN BIT(31)
+#define BIT_EXT_VSYNC BIT(30)
+#define BIT_EOF_INT_EN BIT(29)
+#define BIT_PRP_IF_EN BIT(28)
+#define BIT_CCIR_MODE BIT(27)
+#define BIT_COF_INT_EN BIT(26)
+#define BIT_SF_OR_INTEN BIT(25)
+#define BIT_RF_OR_INTEN BIT(24)
+#define BIT_SFF_DMA_DONE_INTEN BIT(22)
+#define BIT_STATFF_INTEN BIT(21)
+#define BIT_FB2_DMA_DONE_INTEN BIT(20)
+#define BIT_FB1_DMA_DONE_INTEN BIT(19)
+#define BIT_RXFF_INTEN BIT(18)
+#define BIT_SOF_POL BIT(17)
+#define BIT_SOF_INTEN BIT(16)
+#define BIT_MCLKDIV (0xF << 12)
+#define BIT_HSYNC_POL BIT(11)
+#define BIT_CCIR_EN BIT(10)
+#define BIT_MCLKEN BIT(9)
+#define BIT_FCC BIT(8)
+#define BIT_PACK_DIR BIT(7)
+#define BIT_CLR_STATFIFO BIT(6)
+#define BIT_CLR_RXFIFO BIT(5)
+#define BIT_GCLK_MODE BIT(4)
+#define BIT_INV_DATA BIT(3)
+#define BIT_INV_PCLK BIT(2)
+#define BIT_REDGE BIT(1)
+#define BIT_PIXEL_BIT BIT(0)
+
+#define SHIFT_MCLKDIV 12
+
+/* control reg 3 */
+#define BIT_FRMCNT (0xFFFF << 16)
+#define BIT_FRMCNT_RST BIT(15)
+#define BIT_DMA_REFLASH_RFF BIT(14)
+#define BIT_DMA_REFLASH_SFF BIT(13)
+#define BIT_DMA_REQ_EN_RFF BIT(12)
+#define BIT_DMA_REQ_EN_SFF BIT(11)
+#define BIT_STATFF_LEVEL (0x7 << 8)
+#define BIT_HRESP_ERR_EN BIT(7)
+#define BIT_RXFF_LEVEL (0x7 << 4)
+#define BIT_TWO_8BIT_SENSOR BIT(3)
+#define BIT_ZERO_PACK_EN BIT(2)
+#define BIT_ECC_INT_EN BIT(1)
+#define BIT_ECC_AUTO_EN BIT(0)
+
+#define SHIFT_FRMCNT 16
+#define SHIFT_RXFIFO_LEVEL 4
+
+/* csi status reg */
+#define BIT_ADDR_CH_ERR_INT BIT(28)
+#define BIT_FIELD0_INT BIT(27)
+#define BIT_FIELD1_INT BIT(26)
+#define BIT_SFF_OR_INT BIT(25)
+#define BIT_RFF_OR_INT BIT(24)
+#define BIT_DMA_TSF_DONE_SFF BIT(22)
+#define BIT_STATFF_INT BIT(21)
+#define BIT_DMA_TSF_DONE_FB2 BIT(20)
+#define BIT_DMA_TSF_DONE_FB1 BIT(19)
+#define BIT_RXFF_INT BIT(18)
+#define BIT_EOF_INT BIT(17)
+#define BIT_SOF_INT BIT(16)
+#define BIT_F2_INT BIT(15)
+#define BIT_F1_INT BIT(14)
+#define BIT_COF_INT BIT(13)
+#define BIT_HRESP_ERR_INT BIT(7)
+#define BIT_ECC_INT BIT(1)
+#define BIT_DRDY BIT(0)
+
+/* csi control reg 18 */
+#define BIT_CSI_HW_ENABLE BIT(31)
+#define BIT_MIPI_DATA_FORMAT_RAW8 (0x2a << 25)
+#define BIT_MIPI_DATA_FORMAT_RAW10 (0x2b << 25)
+#define BIT_MIPI_DATA_FORMAT_RAW12 (0x2c << 25)
+#define BIT_MIPI_DATA_FORMAT_RAW14 (0x2d << 25)
+#define BIT_MIPI_DATA_FORMAT_YUV422_8B (0x1e << 25)
+#define BIT_MIPI_DATA_FORMAT_MASK (0x3F << 25)
+#define BIT_MIPI_DATA_FORMAT_OFFSET 25
+#define BIT_DATA_FROM_MIPI BIT(22)
+#define BIT_MIPI_YU_SWAP BIT(21)
+#define BIT_MIPI_DOUBLE_CMPNT BIT(20)
+#define BIT_BASEADDR_CHG_ERR_EN BIT(9)
+#define BIT_BASEADDR_SWITCH_SEL BIT(5)
+#define BIT_BASEADDR_SWITCH_EN BIT(4)
+#define BIT_PARALLEL24_EN BIT(3)
+#define BIT_DEINTERLACE_EN BIT(2)
+#define BIT_TVDECODER_IN_EN BIT(1)
+#define BIT_NTSC_EN BIT(0)
+
+#define CSI_MCLK_VF 1
+#define CSI_MCLK_ENC 2
+#define CSI_MCLK_RAW 4
+#define CSI_MCLK_I2C 8
+
+#define CSI_CSICR1 0x0
+#define CSI_CSICR2 0x4
+#define CSI_CSICR3 0x8
+#define CSI_STATFIFO 0xC
+#define CSI_CSIRXFIFO 0x10
+#define CSI_CSIRXCNT 0x14
+#define CSI_CSISR 0x18
+
+#define CSI_CSIDBG 0x1C
+#define CSI_CSIDMASA_STATFIFO 0x20
+#define CSI_CSIDMATS_STATFIFO 0x24
+#define CSI_CSIDMASA_FB1 0x28
+#define CSI_CSIDMASA_FB2 0x2C
+#define CSI_CSIFBUF_PARA 0x30
+#define CSI_CSIIMAG_PARA 0x34
+
+#define CSI_CSICR18 0x48
+#define CSI_CSICR19 0x4c
+
+static const char * const imx7_csi_clk_id[] = {"axi", "dcic", "mclk"};
+
+struct imx7_csi {
+ struct device *dev;
+ struct v4l2_subdev sd;
+ struct imx_media_video_dev *vdev;
+ struct imx_media_dev *imxmd;
+ struct media_pad pad[IMX7_CSI_PADS_NUM];
+
+ /* lock to protect members below */
+ struct mutex lock;
+ /* lock to protect irq handler when stop streaming */
+ spinlock_t irqlock;
+
+ struct v4l2_subdev *src_sd;
+
+ struct media_entity *sink;
+
+ struct v4l2_fwnode_endpoint upstream_ep;
+
+ struct v4l2_mbus_framefmt format_mbus[IMX7_CSI_PADS_NUM];
+ const struct imx_media_pixfmt *cc[IMX7_CSI_PADS_NUM];
+ struct v4l2_fract frame_interval[IMX7_CSI_PADS_NUM];
+
+ struct v4l2_ctrl_handler ctrl_hdlr;
+
+ void __iomem *regbase;
+ int irq;
+
+ int num_clks;
+ struct clk_bulk_data *clks;
+
+ /* active vb2 buffers to send to video dev sink */
+ struct imx_media_buffer *active_vb2_buf[2];
+ struct imx_media_dma_buf underrun_buf;
+
+ int buf_num;
+ u32 frame_sequence;
+
+ bool last_eof;
+ bool is_init;
+ bool is_streaming;
+ bool is_csi2;
+
+ struct completion last_eof_completion;
+};
+
+#define imx7_csi_reg_read(_csi, _offset) \
+ __raw_readl((_csi)->regbase + (_offset))
+#define imx7_csi_reg_write(_csi, _val, _offset) \
+ __raw_writel(_val, (_csi)->regbase + (_offset))
+
+static void imx7_csi_clk_enable(struct imx7_csi *csi)
+{
+ int ret;
+
+ ret = clk_bulk_prepare_enable(csi->num_clks, csi->clks);
+ if (ret < 0)
+ dev_err(csi->dev, "failed to enable clocks\n");
+}
+
+static void imx7_csi_clk_disable(struct imx7_csi *csi)
+{
+ clk_bulk_disable_unprepare(csi->num_clks, csi->clks);
+}
+
+static void imx7_csi_hw_reset(struct imx7_csi *csi)
+{
+ imx7_csi_reg_write(csi,
+ imx7_csi_reg_read(csi, CSI_CSICR3) | BIT_FRMCNT_RST,
+ CSI_CSICR3);
+
+ imx7_csi_reg_write(csi, CSICR1_RESET_VAL, CSI_CSICR1);
+ imx7_csi_reg_write(csi, CSICR2_RESET_VAL, CSI_CSICR2);
+ imx7_csi_reg_write(csi, CSICR3_RESET_VAL, CSI_CSICR3);
+}
+
+static unsigned long imx7_csi_irq_clear(struct imx7_csi *csi)
+{
+ unsigned long isr;
+
+ isr = imx7_csi_reg_read(csi, CSI_CSISR);
+ imx7_csi_reg_write(csi, isr, CSI_CSISR);
+
+ return isr;
+}
+
+static void imx7_csi_init_interface(struct imx7_csi *csi)
+{
+ unsigned int val = 0;
+ unsigned int imag_para;
+
+ val = BIT_SOF_POL | BIT_REDGE | BIT_GCLK_MODE | BIT_HSYNC_POL |
+ BIT_FCC | 1 << SHIFT_MCLKDIV | BIT_MCLKEN;
+ imx7_csi_reg_write(csi, val, CSI_CSICR1);
+
+ imag_para = (800 << 16) | 600;
+ imx7_csi_reg_write(csi, imag_para, CSI_CSIIMAG_PARA);
+
+ val = BIT_DMA_REFLASH_RFF;
+ imx7_csi_reg_write(csi, val, CSI_CSICR3);
+}
+
+static void imx7_csi_hw_enable_irq(struct imx7_csi *csi)
+{
+ unsigned long cr1 = imx7_csi_reg_read(csi, CSI_CSICR1);
+
+ cr1 |= BIT_SOF_INTEN;
+ cr1 |= BIT_RFF_OR_INT;
+
+ /* still capture needs DMA interrupt */
+ cr1 |= BIT_FB1_DMA_DONE_INTEN;
+ cr1 |= BIT_FB2_DMA_DONE_INTEN;
+
+ cr1 |= BIT_EOF_INT_EN;
+
+ imx7_csi_reg_write(csi, cr1, CSI_CSICR1);
+}
+
+static void imx7_csi_hw_disable_irq(struct imx7_csi *csi)
+{
+ unsigned long cr1 = imx7_csi_reg_read(csi, CSI_CSICR1);
+
+ cr1 &= ~BIT_SOF_INTEN;
+ cr1 &= ~BIT_RFF_OR_INT;
+ cr1 &= ~BIT_FB1_DMA_DONE_INTEN;
+ cr1 &= ~BIT_FB2_DMA_DONE_INTEN;
+ cr1 &= ~BIT_EOF_INT_EN;
+
+ imx7_csi_reg_write(csi, cr1, CSI_CSICR1);
+}
+
+static void imx7_csi_hw_enable(struct imx7_csi *csi)
+{
+ unsigned long cr = imx7_csi_reg_read(csi, CSI_CSICR18);
+
+ cr |= BIT_CSI_HW_ENABLE;
+
+ imx7_csi_reg_write(csi, cr, CSI_CSICR18);
+}
+
+static void imx7_csi_hw_disable(struct imx7_csi *csi)
+{
+ unsigned long cr = imx7_csi_reg_read(csi, CSI_CSICR18);
+
+ cr &= ~BIT_CSI_HW_ENABLE;
+
+ imx7_csi_reg_write(csi, cr, CSI_CSICR18);
+}
+
+static void imx7_csi_dma_reflash(struct imx7_csi *csi)
+{
+ unsigned long cr3 = imx7_csi_reg_read(csi, CSI_CSICR18);
+
+ cr3 = imx7_csi_reg_read(csi, CSI_CSICR3);
+ cr3 |= BIT_DMA_REFLASH_RFF;
+ imx7_csi_reg_write(csi, cr3, CSI_CSICR3);
+}
+
+static void imx7_csi_rx_fifo_clear(struct imx7_csi *csi)
+{
+ unsigned long cr1;
+
+ cr1 = imx7_csi_reg_read(csi, CSI_CSICR1);
+ imx7_csi_reg_write(csi, cr1 & ~BIT_FCC, CSI_CSICR1);
+ cr1 = imx7_csi_reg_read(csi, CSI_CSICR1);
+ imx7_csi_reg_write(csi, cr1 | BIT_CLR_RXFIFO, CSI_CSICR1);
+
+ cr1 = imx7_csi_reg_read(csi, CSI_CSICR1);
+ imx7_csi_reg_write(csi, cr1 | BIT_FCC, CSI_CSICR1);
+}
+
+static void imx7_csi_buf_stride_set(struct imx7_csi *csi, u32 stride)
+{
+ imx7_csi_reg_write(csi, stride, CSI_CSIFBUF_PARA);
+}
+
+static void imx7_csi_deinterlace_enable(struct imx7_csi *csi, bool enable)
+{
+ unsigned long cr18 = imx7_csi_reg_read(csi, CSI_CSICR18);
+
+ if (enable)
+ cr18 |= BIT_DEINTERLACE_EN;
+ else
+ cr18 &= ~BIT_DEINTERLACE_EN;
+
+ imx7_csi_reg_write(csi, cr18, CSI_CSICR18);
+}
+
+static void imx7_csi_dmareq_rff_enable(struct imx7_csi *csi)
+{
+ unsigned long cr3 = imx7_csi_reg_read(csi, CSI_CSICR3);
+ unsigned long cr2 = imx7_csi_reg_read(csi, CSI_CSICR2);
+
+ /* Burst Type of DMA Transfer from RxFIFO. INCR16 */
+ cr2 |= 0xC0000000;
+
+ cr3 |= BIT_DMA_REQ_EN_RFF;
+ cr3 |= BIT_HRESP_ERR_EN;
+ cr3 &= ~BIT_RXFF_LEVEL;
+ cr3 |= 0x2 << 4;
+
+ imx7_csi_reg_write(csi, cr3, CSI_CSICR3);
+ imx7_csi_reg_write(csi, cr2, CSI_CSICR2);
+}
+
+static void imx7_csi_dmareq_rff_disable(struct imx7_csi *csi)
+{
+ unsigned long cr3 = imx7_csi_reg_read(csi, CSI_CSICR3);
+
+ cr3 &= ~BIT_DMA_REQ_EN_RFF;
+ cr3 &= ~BIT_HRESP_ERR_EN;
+ imx7_csi_reg_write(csi, cr3, CSI_CSICR3);
+}
+
+static void imx7_csi_set_imagpara(struct imx7_csi *csi, int width, int height)
+{
+ int imag_para;
+ int rx_count;
+
+ rx_count = (width * height) >> 2;
+ imx7_csi_reg_write(csi, rx_count, CSI_CSIRXCNT);
+
+ imag_para = (width << 16) | height;
+ imx7_csi_reg_write(csi, imag_para, CSI_CSIIMAG_PARA);
+
+ /* reflash the embedded DMA controller */
+ imx7_csi_dma_reflash(csi);
+}
+
+static void imx7_csi_sw_reset(struct imx7_csi *csi)
+{
+ imx7_csi_hw_disable(csi);
+
+ imx7_csi_rx_fifo_clear(csi);
+
+ imx7_csi_dma_reflash(csi);
+
+ usleep_range(2000, 3000);
+
+ imx7_csi_irq_clear(csi);
+
+ imx7_csi_hw_enable(csi);
+}
+
+static void imx7_csi_error_recovery(struct imx7_csi *csi)
+{
+ imx7_csi_hw_disable(csi);
+
+ imx7_csi_rx_fifo_clear(csi);
+
+ imx7_csi_dma_reflash(csi);
+
+ imx7_csi_hw_enable(csi);
+}
+
+static void imx7_csi_init(struct imx7_csi *csi)
+{
+ if (csi->is_init)
+ return;
+
+ imx7_csi_clk_enable(csi);
+ imx7_csi_hw_reset(csi);
+ imx7_csi_init_interface(csi);
+ imx7_csi_dmareq_rff_enable(csi);
+
+ csi->is_init = true;
+}
+
+static void imx7_csi_deinit(struct imx7_csi *csi)
+{
+ if (!csi->is_init)
+ return;
+
+ imx7_csi_hw_reset(csi);
+ imx7_csi_init_interface(csi);
+ imx7_csi_dmareq_rff_disable(csi);
+ imx7_csi_clk_disable(csi);
+
+ csi->is_init = false;
+}
+
+static int imx7_csi_get_upstream_endpoint(struct imx7_csi *csi,
+ struct v4l2_fwnode_endpoint *ep,
+ bool skip_mux)
+{
+ struct device_node *endpoint, *port;
+ struct media_entity *src;
+ struct v4l2_subdev *sd;
+ struct media_pad *pad;
+
+ if (!csi->src_sd)
+ return -EPIPE;
+
+ src = &csi->src_sd->entity;
+
+skip_video_mux:
+ /* get source pad of entity directly upstream from src */
+ pad = imx_media_find_upstream_pad(csi->imxmd, src, 0);
+ if (IS_ERR(pad))
+ return PTR_ERR(pad);
+
+ sd = media_entity_to_v4l2_subdev(pad->entity);
+
+ /* To get bus type we may need to skip video mux */
+ if (skip_mux && src->function == MEDIA_ENT_F_VID_MUX) {
+ src = &sd->entity;
+ goto skip_video_mux;
+ }
+
+ /*
+ * NOTE: this assumes an OF-graph port id is the same as a
+ * media pad index.
+ */
+ port = of_graph_get_port_by_id(sd->dev->of_node, pad->index);
+ if (!port)
+ return -ENODEV;
+
+ endpoint = of_get_next_child(port, NULL);
+ of_node_put(port);
+ if (!endpoint)
+ return -ENODEV;
+
+ v4l2_fwnode_endpoint_parse(of_fwnode_handle(endpoint), ep);
+ of_node_put(endpoint);
+
+ return 0;
+}
+
+static int imx7_csi_link_setup(struct media_entity *entity,
+ const struct media_pad *local,
+ const struct media_pad *remote, u32 flags)
+{
+ struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
+ struct imx7_csi *csi = v4l2_get_subdevdata(sd);
+ struct v4l2_subdev *remote_sd;
+ int ret = 0;
+
+ dev_dbg(csi->dev, "link setup %s -> %s\n", remote->entity->name,
+ local->entity->name);
+
+ mutex_lock(&csi->lock);
+
+ if (local->flags & MEDIA_PAD_FL_SINK) {
+ if (!is_media_entity_v4l2_subdev(remote->entity)) {
+ ret = -EINVAL;
+ goto unlock;
+ }
+
+ remote_sd = media_entity_to_v4l2_subdev(remote->entity);
+
+ if (flags & MEDIA_LNK_FL_ENABLED) {
+ if (csi->src_sd) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+ csi->src_sd = remote_sd;
+ } else {
+ csi->src_sd = NULL;
+ }
+
+ goto init;
+ }
+
+ /* source pad */
+ if (flags & MEDIA_LNK_FL_ENABLED) {
+ if (csi->sink) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+ csi->sink = remote->entity;
+ } else {
+ v4l2_ctrl_handler_free(&csi->ctrl_hdlr);
+ v4l2_ctrl_handler_init(&csi->ctrl_hdlr, 0);
+ csi->sink = NULL;
+ }
+
+init:
+ if (csi->sink || csi->src_sd)
+ imx7_csi_init(csi);
+ else
+ imx7_csi_deinit(csi);
+
+unlock:
+ mutex_unlock(&csi->lock);
+
+ return ret;
+}
+
+static int imx7_csi_pad_link_validate(struct v4l2_subdev *sd,
+ struct media_link *link,
+ struct v4l2_subdev_format *source_fmt,
+ struct v4l2_subdev_format *sink_fmt)
+{
+ struct imx7_csi *csi = v4l2_get_subdevdata(sd);
+ struct v4l2_fwnode_endpoint upstream_ep = {};
+ int ret;
+
+ ret = v4l2_subdev_link_validate_default(sd, link, source_fmt, sink_fmt);
+ if (ret)
+ return ret;
+
+ ret = imx7_csi_get_upstream_endpoint(csi, &upstream_ep, true);
+ if (ret) {
+ v4l2_err(&csi->sd, "failed to find upstream endpoint\n");
+ return ret;
+ }
+
+ mutex_lock(&csi->lock);
+
+ csi->upstream_ep = upstream_ep;
+ csi->is_csi2 = (upstream_ep.bus_type == V4L2_MBUS_CSI2_DPHY);
+
+ mutex_unlock(&csi->lock);
+
+ return 0;
+}
+
+static void imx7_csi_update_buf(struct imx7_csi *csi, dma_addr_t phys,
+ int buf_num)
+{
+ if (buf_num == 1)
+ imx7_csi_reg_write(csi, phys, CSI_CSIDMASA_FB2);
+ else
+ imx7_csi_reg_write(csi, phys, CSI_CSIDMASA_FB1);
+}
+
+static void imx7_csi_setup_vb2_buf(struct imx7_csi *csi)
+{
+ struct imx_media_video_dev *vdev = csi->vdev;
+ struct imx_media_buffer *buf;
+ struct vb2_buffer *vb2_buf;
+ dma_addr_t phys[2];
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ buf = imx_media_capture_device_next_buf(vdev);
+ if (buf) {
+ csi->active_vb2_buf[i] = buf;
+ vb2_buf = &buf->vbuf.vb2_buf;
+ phys[i] = vb2_dma_contig_plane_dma_addr(vb2_buf, 0);
+ } else {
+ csi->active_vb2_buf[i] = NULL;
+ phys[i] = csi->underrun_buf.phys;
+ }
+
+ imx7_csi_update_buf(csi, phys[i], i);
+ }
+}
+
+static void imx7_csi_dma_unsetup_vb2_buf(struct imx7_csi *csi,
+ enum vb2_buffer_state return_status)
+{
+ struct imx_media_buffer *buf;
+ int i;
+
+ /* return any remaining active frames with return_status */
+ for (i = 0; i < 2; i++) {
+ buf = csi->active_vb2_buf[i];
+ if (buf) {
+ struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
+
+ vb->timestamp = ktime_get_ns();
+ vb2_buffer_done(vb, return_status);
+ }
+ }
+}
+
+static void imx7_csi_vb2_buf_done(struct imx7_csi *csi)
+{
+ struct imx_media_video_dev *vdev = csi->vdev;
+ struct imx_media_buffer *done, *next;
+ struct vb2_buffer *vb;
+ dma_addr_t phys;
+
+ done = csi->active_vb2_buf[csi->buf_num];
+ if (done) {
+ done->vbuf.field = vdev->fmt.fmt.pix.field;
+ done->vbuf.sequence = csi->frame_sequence;
+ vb = &done->vbuf.vb2_buf;
+ vb->timestamp = ktime_get_ns();
+ vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+ }
+ csi->frame_sequence++;
+
+ /* get next queued buffer */
+ next = imx_media_capture_device_next_buf(vdev);
+ if (next) {
+ phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0);
+ csi->active_vb2_buf[csi->buf_num] = next;
+ } else {
+ phys = csi->underrun_buf.phys;
+ csi->active_vb2_buf[csi->buf_num] = NULL;
+ }
+
+ imx7_csi_update_buf(csi, phys, csi->buf_num);
+}
+
+static irqreturn_t imx7_csi_irq_handler(int irq, void *data)
+{
+ struct imx7_csi *csi = data;
+ unsigned long status;
+
+ spin_lock(&csi->irqlock);
+
+ status = imx7_csi_irq_clear(csi);
+
+ if (status & BIT_RFF_OR_INT) {
+ dev_warn(csi->dev, "Rx fifo overflow\n");
+ imx7_csi_error_recovery(csi);
+ }
+
+ if (status & BIT_HRESP_ERR_INT) {
+ dev_warn(csi->dev, "Hresponse error detected\n");
+ imx7_csi_error_recovery(csi);
+ }
+
+ if (status & BIT_ADDR_CH_ERR_INT) {
+ imx7_csi_hw_disable(csi);
+
+ imx7_csi_dma_reflash(csi);
+
+ imx7_csi_hw_enable(csi);
+ }
+
+ if ((status & BIT_DMA_TSF_DONE_FB1) &&
+ (status & BIT_DMA_TSF_DONE_FB2)) {
+ /*
+ * For both FB1 and FB2 interrupter bits set case,
+ * CSI DMA is work in one of FB1 and FB2 buffer,
+ * but software can not know the state.
+ * Skip it to avoid base address updated
+ * when csi work in field0 and field1 will write to
+ * new base address.
+ */
+ } else if (status & BIT_DMA_TSF_DONE_FB1) {
+ csi->buf_num = 0;
+ } else if (status & BIT_DMA_TSF_DONE_FB2) {
+ csi->buf_num = 1;
+ }
+
+ if ((status & BIT_DMA_TSF_DONE_FB1) ||
+ (status & BIT_DMA_TSF_DONE_FB2)) {
+ imx7_csi_vb2_buf_done(csi);
+
+ if (csi->last_eof) {
+ complete(&csi->last_eof_completion);
+ csi->last_eof = false;
+ }
+ }
+
+ spin_unlock(&csi->irqlock);
+
+ return IRQ_HANDLED;
+}
+
+static int imx7_csi_dma_start(struct imx7_csi *csi)
+{
+ struct imx_media_video_dev *vdev = csi->vdev;
+ struct v4l2_pix_format *out_pix = &vdev->fmt.fmt.pix;
+ int ret;
+
+ ret = imx_media_alloc_dma_buf(csi->imxmd, &csi->underrun_buf,
+ out_pix->sizeimage);
+ if (ret < 0) {
+ v4l2_warn(&csi->sd, "consider increasing the CMA area\n");
+ return ret;
+ }
+
+ csi->frame_sequence = 0;
+ csi->last_eof = false;
+ init_completion(&csi->last_eof_completion);
+
+ imx7_csi_setup_vb2_buf(csi);
+
+ return 0;
+}
+
+static void imx7_csi_dma_stop(struct imx7_csi *csi)
+{
+ unsigned long timeout_jiffies;
+ unsigned long flags;
+ int ret;
+
+ /* mark next EOF interrupt as the last before stream off */
+ spin_lock_irqsave(&csi->irqlock, flags);
+ csi->last_eof = true;
+ spin_unlock_irqrestore(&csi->irqlock, flags);
+
+ /*
+ * and then wait for interrupt handler to mark completion.
+ */
+ timeout_jiffies = msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT);
+ ret = wait_for_completion_timeout(&csi->last_eof_completion,
+ timeout_jiffies);
+ if (ret == 0)
+ v4l2_warn(&csi->sd, "wait last EOF timeout\n");
+
+ imx7_csi_hw_disable_irq(csi);
+
+ imx7_csi_dma_unsetup_vb2_buf(csi, VB2_BUF_STATE_ERROR);
+
+ imx_media_free_dma_buf(csi->imxmd, &csi->underrun_buf);
+}
+
+static int imx7_csi_configure(struct imx7_csi *csi)
+{
+ struct imx_media_video_dev *vdev = csi->vdev;
+ struct v4l2_pix_format *out_pix = &vdev->fmt.fmt.pix;
+ __u32 in_code = csi->format_mbus[IMX7_CSI_PAD_SINK].code;
+ u32 cr1, cr18;
+
+ if (out_pix->field == V4L2_FIELD_INTERLACED) {
+ imx7_csi_deinterlace_enable(csi, true);
+ imx7_csi_buf_stride_set(csi, out_pix->width);
+ } else {
+ imx7_csi_deinterlace_enable(csi, false);
+ imx7_csi_buf_stride_set(csi, 0);
+ }
+
+ imx7_csi_set_imagpara(csi, out_pix->width, out_pix->height);
+
+ if (!csi->is_csi2)
+ return 0;
+
+ cr1 = imx7_csi_reg_read(csi, CSI_CSICR1);
+ cr1 &= ~BIT_GCLK_MODE;
+
+ cr18 = imx7_csi_reg_read(csi, CSI_CSICR18);
+ cr18 &= BIT_MIPI_DATA_FORMAT_MASK;
+ cr18 |= BIT_DATA_FROM_MIPI;
+
+ switch (out_pix->pixelformat) {
+ case V4L2_PIX_FMT_UYVY:
+ case V4L2_PIX_FMT_YUYV:
+ cr18 |= BIT_MIPI_DATA_FORMAT_YUV422_8B;
+ break;
+ case V4L2_PIX_FMT_SBGGR8:
+ cr18 |= BIT_MIPI_DATA_FORMAT_RAW8;
+ break;
+ case V4L2_PIX_FMT_SBGGR16:
+ if (in_code == MEDIA_BUS_FMT_SBGGR10_1X10)
+ cr18 |= BIT_MIPI_DATA_FORMAT_RAW10;
+ else if (in_code == MEDIA_BUS_FMT_SBGGR12_1X12)
+ cr18 |= BIT_MIPI_DATA_FORMAT_RAW12;
+ else if (in_code == MEDIA_BUS_FMT_SBGGR14_1X14)
+ cr18 |= BIT_MIPI_DATA_FORMAT_RAW14;
+ cr1 |= BIT_PIXEL_BIT;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ imx7_csi_reg_write(csi, cr1, CSI_CSICR1);
+ imx7_csi_reg_write(csi, cr18, CSI_CSICR18);
+
+ return 0;
+}
+
+static int imx7_csi_enable(struct imx7_csi *csi)
+{
+ imx7_csi_sw_reset(csi);
+
+ if (csi->is_csi2) {
+ imx7_csi_dmareq_rff_enable(csi);
+ imx7_csi_hw_enable_irq(csi);
+ imx7_csi_hw_enable(csi);
+ return 0;
+ }
+
+ return 0;
+}
+
+static void imx7_csi_disable(struct imx7_csi *csi)
+{
+ imx7_csi_dmareq_rff_disable(csi);
+
+ imx7_csi_hw_disable_irq(csi);
+
+ imx7_csi_buf_stride_set(csi, 0);
+
+ imx7_csi_hw_disable(csi);
+}
+
+static int imx7_csi_streaming_start(struct imx7_csi *csi)
+{
+ int ret;
+
+ ret = imx7_csi_dma_start(csi);
+ if (ret < 0)
+ return ret;
+
+ ret = imx7_csi_configure(csi);
+ if (ret < 0)
+ goto dma_stop;
+
+ imx7_csi_enable(csi);
+
+ return 0;
+
+dma_stop:
+ imx7_csi_dma_stop(csi);
+
+ return ret;
+}
+
+static int imx7_csi_streaming_stop(struct imx7_csi *csi)
+{
+ imx7_csi_dma_stop(csi);
+
+ imx7_csi_disable(csi);
+
+ return 0;
+}
+
+static int imx7_csi_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct imx7_csi *csi = v4l2_get_subdevdata(sd);
+ int ret = 0;
+
+ mutex_lock(&csi->lock);
+
+ if (!csi->src_sd || !csi->sink) {
+ ret = -EPIPE;
+ goto out_unlock;
+ }
+
+ if (csi->is_streaming == !!enable)
+ goto out_unlock;
+
+ if (enable) {
+ ret = v4l2_subdev_call(csi->src_sd, video, s_stream, 1);
+ if (ret < 0)
+ goto out_unlock;
+
+ ret = imx7_csi_streaming_start(csi);
+ if (ret < 0) {
+ v4l2_subdev_call(csi->src_sd, video, s_stream, 0);
+ goto out_unlock;
+ }
+ } else {
+ imx7_csi_streaming_stop(csi);
+
+ v4l2_subdev_call(csi->src_sd, video, s_stream, 0);
+ }
+
+ csi->is_streaming = !!enable;
+
+out_unlock:
+ mutex_unlock(&csi->lock);
+
+ return ret;
+}
+
+static struct v4l2_mbus_framefmt *imx7_csi_get_format(struct imx7_csi *csi,
+ struct v4l2_subdev_pad_config *cfg,
+ unsigned int pad,
+ enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return v4l2_subdev_get_try_format(&csi->sd, cfg, pad);
+
+ return &csi->format_mbus[pad];
+}
+
+static int imx7_csi_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct imx7_csi *csi = v4l2_get_subdevdata(sd);
+ const struct imx_media_pixfmt *in_cc;
+ struct v4l2_mbus_framefmt *in_fmt;
+ int ret = 0;
+
+ mutex_lock(&csi->lock);
+
+ in_fmt = imx7_csi_get_format(csi, cfg, IMX7_CSI_PAD_SINK, code->which);
+
+ in_cc = imx_media_find_mbus_format(in_fmt->code, CS_SEL_ANY, true);
+
+ switch (code->pad) {
+ case IMX7_CSI_PAD_SINK:
+ ret = imx_media_enum_mbus_format(&code->code, code->index,
+ CS_SEL_ANY, true);
+ break;
+ case IMX7_CSI_PAD_SRC:
+ if (code->index != 0) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ code->code = in_fmt->code;
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+out_unlock:
+ mutex_unlock(&csi->lock);
+
+ return ret;
+}
+
+static int imx7_csi_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *sdformat)
+{
+ struct imx7_csi *csi = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *fmt;
+ int ret = 0;
+
+ mutex_lock(&csi->lock);
+
+ fmt = imx7_csi_get_format(csi, cfg, sdformat->pad, sdformat->which);
+ if (!fmt) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ sdformat->format = *fmt;
+
+out_unlock:
+ mutex_unlock(&csi->lock);
+
+ return ret;
+}
+
+static void imx7_csi_try_fmt(struct imx7_csi *csi,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *sdformat,
+ const struct imx_media_pixfmt **cc)
+{
+ const struct imx_media_pixfmt *in_cc;
+ struct v4l2_mbus_framefmt *in_fmt;
+ u32 code;
+
+ in_fmt = imx7_csi_get_format(csi, cfg, IMX7_CSI_PAD_SINK,
+ sdformat->which);
+ if (!in_fmt)
+ return;
+
+ switch (sdformat->pad) {
+ case IMX7_CSI_PAD_SRC:
+ in_cc = imx_media_find_mbus_format(in_fmt->code, CS_SEL_ANY,
+ true);
+
+ sdformat->format.width = in_fmt->width;
+ sdformat->format.height = in_fmt->height;
+ sdformat->format.code = in_fmt->code;
+ *cc = in_cc;
+
+ sdformat->format.colorspace = in_fmt->colorspace;
+ sdformat->format.xfer_func = in_fmt->xfer_func;
+ sdformat->format.quantization = in_fmt->quantization;
+ sdformat->format.ycbcr_enc = in_fmt->ycbcr_enc;
+ break;
+ case IMX7_CSI_PAD_SINK:
+ *cc = imx_media_find_mbus_format(sdformat->format.code,
+ CS_SEL_ANY, true);
+ if (!*cc) {
+ imx_media_enum_mbus_format(&code, 0, CS_SEL_ANY, false);
+ *cc = imx_media_find_mbus_format(code, CS_SEL_ANY,
+ false);
+ sdformat->format.code = (*cc)->codes[0];
+ }
+
+ imx_media_fill_default_mbus_fields(&sdformat->format, in_fmt,
+ false);
+ break;
+ default:
+ break;
+ }
+}
+
+static int imx7_csi_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *sdformat)
+{
+ struct imx7_csi *csi = v4l2_get_subdevdata(sd);
+ struct imx_media_video_dev *vdev = csi->vdev;
+ const struct imx_media_pixfmt *outcc;
+ struct v4l2_mbus_framefmt *outfmt;
+ struct v4l2_pix_format vdev_fmt;
+ const struct imx_media_pixfmt *cc;
+ struct v4l2_mbus_framefmt *fmt;
+ struct v4l2_subdev_format format;
+ int ret = 0;
+
+ if (sdformat->pad >= IMX7_CSI_PADS_NUM)
+ return -EINVAL;
+
+ mutex_lock(&csi->lock);
+
+ if (csi->is_streaming) {
+ ret = -EBUSY;
+ goto out_unlock;
+ }
+
+ imx7_csi_try_fmt(csi, cfg, sdformat, &cc);
+
+ fmt = imx7_csi_get_format(csi, cfg, sdformat->pad, sdformat->which);
+ if (!fmt) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ *fmt = sdformat->format;
+
+ if (sdformat->pad == IMX7_CSI_PAD_SINK) {
+ /* propagate format to source pads */
+ format.pad = IMX7_CSI_PAD_SRC;
+ format.which = sdformat->which;
+ format.format = sdformat->format;
+ imx7_csi_try_fmt(csi, cfg, &format, &outcc);
+
+ outfmt = imx7_csi_get_format(csi, cfg, IMX7_CSI_PAD_SRC,
+ sdformat->which);
+ *outfmt = format.format;
+
+ if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+ csi->cc[IMX7_CSI_PAD_SRC] = outcc;
+ }
+
+ if (sdformat->which == V4L2_SUBDEV_FORMAT_TRY)
+ goto out_unlock;
+
+ csi->cc[sdformat->pad] = cc;
+
+ /* propagate output pad format to capture device */
+ imx_media_mbus_fmt_to_pix_fmt(&vdev_fmt,
+ &csi->format_mbus[IMX7_CSI_PAD_SRC],
+ csi->cc[IMX7_CSI_PAD_SRC]);
+ mutex_unlock(&csi->lock);
+ imx_media_capture_device_set_format(vdev, &vdev_fmt);
+
+ return 0;
+
+out_unlock:
+ mutex_unlock(&csi->lock);
+
+ return ret;
+}
+
+static int imx7_csi_registered(struct v4l2_subdev *sd)
+{
+ struct imx7_csi *csi = v4l2_get_subdevdata(sd);
+ int ret;
+ int i;
+
+ for (i = 0; i < IMX7_CSI_PADS_NUM; i++) {
+ csi->pad[i].flags = (i == IMX7_CSI_PAD_SINK) ?
+ MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
+
+ /* set a default mbus format */
+ ret = imx_media_init_mbus_fmt(&csi->format_mbus[i],
+ 800, 600, 0, V4L2_FIELD_NONE,
+ &csi->cc[i]);
+ if (ret < 0)
+ return ret;
+
+ /* init default frame interval */
+ csi->frame_interval[i].numerator = 1;
+ csi->frame_interval[i].denominator = 30;
+ }
+
+ ret = media_entity_pads_init(&sd->entity, IMX7_CSI_PADS_NUM, csi->pad);
+ if (ret < 0)
+ return ret;
+
+ ret = imx_media_capture_device_register(csi->vdev);
+ if (ret < 0)
+ return ret;
+
+ ret = imx_media_add_video_device(csi->imxmd, csi->vdev);
+ if (ret < 0) {
+ imx_media_capture_device_unregister(csi->vdev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void imx7_csi_unregistered(struct v4l2_subdev *sd)
+{
+ struct imx7_csi *csi = v4l2_get_subdevdata(sd);
+
+ imx_media_capture_device_unregister(csi->vdev);
+}
+
+static int imx7_csi_init_cfg(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg)
+{
+ struct imx7_csi *csi = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *mf;
+ int ret;
+ int i;
+
+ for (i = 0; i < IMX7_CSI_PADS_NUM; i++) {
+ mf = v4l2_subdev_get_try_format(sd, cfg, i);
+
+ ret = imx_media_init_mbus_fmt(mf, 800, 600, 0, V4L2_FIELD_NONE,
+ &csi->cc[i]);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct media_entity_operations imx7_csi_entity_ops = {
+ .link_setup = imx7_csi_link_setup,
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+static const struct v4l2_subdev_video_ops imx7_csi_video_ops = {
+ .s_stream = imx7_csi_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops imx7_csi_pad_ops = {
+ .init_cfg = imx7_csi_init_cfg,
+ .enum_mbus_code = imx7_csi_enum_mbus_code,
+ .get_fmt = imx7_csi_get_fmt,
+ .set_fmt = imx7_csi_set_fmt,
+ .link_validate = imx7_csi_pad_link_validate,
+};
+
+static const struct v4l2_subdev_ops imx7_csi_subdev_ops = {
+ .video = &imx7_csi_video_ops,
+ .pad = &imx7_csi_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops imx7_csi_internal_ops = {
+ .registered = imx7_csi_registered,
+ .unregistered = imx7_csi_unregistered,
+};
+
+static int imx7_csi_parse_endpoint(struct device *dev,
+ struct v4l2_fwnode_endpoint *vep,
+ struct v4l2_async_subdev *asd)
+{
+ return fwnode_device_is_available(asd->match.fwnode) ? 0 : -EINVAL;
+}
+
+static int imx7_csi_clocks_get(struct imx7_csi *csi)
+{
+ struct device *dev = csi->dev;
+ int i;
+
+ csi->num_clks = ARRAY_SIZE(imx7_csi_clk_id);
+ csi->clks = devm_kcalloc(dev, csi->num_clks, sizeof(*csi->clks),
+ GFP_KERNEL);
+
+ if (!csi->clks)
+ return -ENOMEM;
+
+ for (i = 0; i < csi->num_clks; i++)
+ csi->clks[i].id = imx7_csi_clk_id[i];
+
+ return devm_clk_bulk_get(dev, csi->num_clks, csi->clks);
+}
+
+static int imx7_csi_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
+ struct imx_media_dev *imxmd;
+ struct imx7_csi *csi;
+ struct resource *res;
+ int ret;
+
+ csi = devm_kzalloc(&pdev->dev, sizeof(*csi), GFP_KERNEL);
+ if (!csi)
+ return -ENOMEM;
+
+ csi->dev = dev;
+
+ ret = imx7_csi_clocks_get(csi);
+ if (ret < 0) {
+ dev_err(dev, "Failed to get clocks");
+ return -ENODEV;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ csi->irq = platform_get_irq(pdev, 0);
+ if (!res || csi->irq < 0) {
+ dev_err(dev, "Missing platform resources data\n");
+ return -ENODEV;
+ }
+
+ csi->regbase = devm_ioremap_resource(dev, res);
+ if (IS_ERR(csi->regbase)) {
+ dev_err(dev, "Failed platform resources map\n");
+ return -ENODEV;
+ }
+
+ spin_lock_init(&csi->irqlock);
+ mutex_init(&csi->lock);
+
+ /* install interrupt handler */
+ ret = devm_request_irq(dev, csi->irq, imx7_csi_irq_handler, 0, "csi",
+ (void *)csi);
+ if (ret < 0) {
+ dev_err(dev, "Request CSI IRQ failed.\n");
+ ret = -ENODEV;
+ goto destroy_mutex;
+ }
+
+ /* add media device */
+ imxmd = imx_media_dev_init(dev);
+ if (IS_ERR(imxmd)) {
+ ret = PTR_ERR(imxmd);
+ goto destroy_mutex;
+ }
+ platform_set_drvdata(pdev, &csi->sd);
+
+ ret = imx_media_of_add_csi(imxmd, node);
+ if (ret < 0)
+ goto cleanup;
+
+ ret = imx_media_dev_notifier_register(imxmd);
+ if (ret < 0)
+ goto cleanup;
+
+ csi->imxmd = imxmd;
+ v4l2_subdev_init(&csi->sd, &imx7_csi_subdev_ops);
+ v4l2_set_subdevdata(&csi->sd, csi);
+ csi->sd.internal_ops = &imx7_csi_internal_ops;
+ csi->sd.entity.ops = &imx7_csi_entity_ops;
+ csi->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+ csi->sd.dev = &pdev->dev;
+ csi->sd.owner = THIS_MODULE;
+ csi->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
+ csi->sd.grp_id = IMX_MEDIA_GRP_ID_CSI;
+ snprintf(csi->sd.name, sizeof(csi->sd.name), "csi");
+
+ csi->vdev = imx_media_capture_device_init(&csi->sd, IMX7_CSI_PAD_SRC);
+ if (IS_ERR(csi->vdev))
+ return PTR_ERR(csi->vdev);
+
+ v4l2_ctrl_handler_init(&csi->ctrl_hdlr, 0);
+ csi->sd.ctrl_handler = &csi->ctrl_hdlr;
+
+ ret = v4l2_async_register_fwnode_subdev(&csi->sd,
+ sizeof(struct v4l2_async_subdev),
+ NULL, 0, imx7_csi_parse_endpoint);
+ if (ret)
+ goto free;
+
+ return 0;
+
+free:
+ imx_media_capture_device_unregister(csi->vdev);
+ imx_media_capture_device_remove(csi->vdev);
+ v4l2_ctrl_handler_free(&csi->ctrl_hdlr);
+
+cleanup:
+ v4l2_async_notifier_cleanup(&imxmd->notifier);
+ v4l2_device_unregister(&imxmd->v4l2_dev);
+ media_device_unregister(&imxmd->md);
+ media_device_cleanup(&imxmd->md);
+
+destroy_mutex:
+ mutex_destroy(&csi->lock);
+
+ return ret;
+}
+
+static int imx7_csi_remove(struct platform_device *pdev)
+{
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct imx7_csi *csi = v4l2_get_subdevdata(sd);
+ struct imx_media_dev *imxmd = csi->imxmd;
+
+ v4l2_async_notifier_unregister(&imxmd->notifier);
+ v4l2_async_notifier_cleanup(&imxmd->notifier);
+
+ media_device_unregister(&imxmd->md);
+ v4l2_device_unregister(&imxmd->v4l2_dev);
+ media_device_cleanup(&imxmd->md);
+
+ imx_media_capture_device_unregister(csi->vdev);
+ imx_media_capture_device_remove(csi->vdev);
+
+ v4l2_async_unregister_subdev(sd);
+ v4l2_ctrl_handler_free(&csi->ctrl_hdlr);
+
+ mutex_destroy(&csi->lock);
+
+ return 0;
+}
+
+static const struct of_device_id imx7_csi_of_match[] = {
+ { .compatible = "fsl,imx7-csi" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, imx7_csi_of_match);
+
+static struct platform_driver imx7_csi_driver = {
+ .probe = imx7_csi_probe,
+ .remove = imx7_csi_remove,
+ .driver = {
+ .of_match_table = imx7_csi_of_match,
+ .name = "imx7-csi",
+ },
+};
+module_platform_driver(imx7_csi_driver);
+
+MODULE_DESCRIPTION("i.MX7 CSI subdev driver");
+MODULE_AUTHOR("Rui Miguel Silva <rui.silva@xxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:imx7-csi");
--
2.20.1
