diff options
Diffstat (limited to 'drivers/media/platform/raspberrypi/rp1-cfe/cfe.c')
| -rw-r--r-- | drivers/media/platform/raspberrypi/rp1-cfe/cfe.c | 2508 |
1 files changed, 2508 insertions, 0 deletions
diff --git a/drivers/media/platform/raspberrypi/rp1-cfe/cfe.c b/drivers/media/platform/raspberrypi/rp1-cfe/cfe.c new file mode 100644 index 000000000000..fcadb2143c88 --- /dev/null +++ b/drivers/media/platform/raspberrypi/rp1-cfe/cfe.c @@ -0,0 +1,2508 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * RP1 Camera Front End Driver + * + * Copyright (c) 2021-2024 Raspberry Pi Ltd. + * Copyright (c) 2023-2024 Ideas on Board Oy + */ + +#include <linux/clk.h> +#include <linux/debugfs.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/dma-mapping.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/lcm.h> +#include <linux/math.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/property.h> +#include <linux/seq_file.h> +#include <linux/slab.h> +#include <linux/uaccess.h> +#include <linux/videodev2.h> + +#include <media/v4l2-async.h> +#include <media/v4l2-common.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-dev.h> +#include <media/v4l2-device.h> +#include <media/v4l2-event.h> +#include <media/v4l2-fwnode.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-mc.h> +#include <media/videobuf2-dma-contig.h> + +#include <linux/media/raspberrypi/pisp_fe_config.h> +#include <linux/media/raspberrypi/pisp_fe_statistics.h> + +#include "cfe-fmts.h" +#include "cfe.h" +#include "csi2.h" +#include "pisp-fe.h" + +#define CREATE_TRACE_POINTS +#include "cfe-trace.h" + +#define CFE_MODULE_NAME "rp1-cfe" +#define CFE_VERSION "1.0" + +#define cfe_dbg(cfe, fmt, arg...) dev_dbg(&(cfe)->pdev->dev, fmt, ##arg) +#define cfe_info(cfe, fmt, arg...) dev_info(&(cfe)->pdev->dev, fmt, ##arg) +#define cfe_err(cfe, fmt, arg...) dev_err(&(cfe)->pdev->dev, fmt, ##arg) + +/* MIPICFG registers */ +#define MIPICFG_CFG 0x004 +#define MIPICFG_INTR 0x028 +#define MIPICFG_INTE 0x02c +#define MIPICFG_INTF 0x030 +#define MIPICFG_INTS 0x034 + +#define MIPICFG_CFG_SEL_CSI BIT(0) + +#define MIPICFG_INT_CSI_DMA BIT(0) +#define MIPICFG_INT_CSI_HOST BIT(2) +#define MIPICFG_INT_PISP_FE BIT(4) + +#define BPL_ALIGNMENT 16 +#define MAX_BYTESPERLINE 0xffffff00 +#define MAX_BUFFER_SIZE 0xffffff00 +/* + * Max width is therefore determined by the max stride divided by the number of + * bits per pixel. + * + * However, to avoid overflow issues let's use a 16k maximum. This lets us + * calculate 16k * 16k * 4 with 32bits. If we need higher maximums, a careful + * review and adjustment of the code is needed so that it will deal with + * overflows correctly. + */ +#define MAX_WIDTH 16384 +#define MAX_HEIGHT MAX_WIDTH +/* Define a nominal minimum image size */ +#define MIN_WIDTH 16 +#define MIN_HEIGHT 16 + +#define MIN_META_WIDTH 4 +#define MIN_META_HEIGHT 1 + +const struct v4l2_mbus_framefmt cfe_default_format = { + .width = 640, + .height = 480, + .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, +}; + +enum node_ids { + /* CSI2 HW output nodes first. */ + CSI2_CH0, + CSI2_CH1, + CSI2_CH2, + CSI2_CH3, + /* FE only nodes from here on. */ + FE_OUT0, + FE_OUT1, + FE_STATS, + FE_CONFIG, + NUM_NODES +}; + +struct node_description { + enum node_ids id; + const char *name; + unsigned int caps; + unsigned int pad_flags; + unsigned int link_pad; +}; + +/* Must match the ordering of enum ids */ +static const struct node_description node_desc[NUM_NODES] = { + [CSI2_CH0] = { + .name = "csi2-ch0", + .caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_META_CAPTURE, + .pad_flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT, + .link_pad = CSI2_PAD_FIRST_SOURCE + 0 + }, + /* + * At the moment the main userspace component (libcamera) doesn't + * support metadata with video nodes that support both video and + * metadata. So for the time being this node is set to only support + * V4L2_CAP_META_CAPTURE. + */ + [CSI2_CH1] = { + .name = "csi2-ch1", + .caps = V4L2_CAP_META_CAPTURE, + .pad_flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT, + .link_pad = CSI2_PAD_FIRST_SOURCE + 1 + }, + [CSI2_CH2] = { + .name = "csi2-ch2", + .caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_META_CAPTURE, + .pad_flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT, + .link_pad = CSI2_PAD_FIRST_SOURCE + 2 + }, + [CSI2_CH3] = { + .name = "csi2-ch3", + .caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_META_CAPTURE, + .pad_flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT, + .link_pad = CSI2_PAD_FIRST_SOURCE + 3 + }, + [FE_OUT0] = { + .name = "fe-image0", + .caps = V4L2_CAP_VIDEO_CAPTURE, + .pad_flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT, + .link_pad = FE_OUTPUT0_PAD + }, + [FE_OUT1] = { + .name = "fe-image1", + .caps = V4L2_CAP_VIDEO_CAPTURE, + .pad_flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT, + .link_pad = FE_OUTPUT1_PAD + }, + [FE_STATS] = { + .name = "fe-stats", + .caps = V4L2_CAP_META_CAPTURE, + .pad_flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT, + .link_pad = FE_STATS_PAD + }, + [FE_CONFIG] = { + .name = "fe-config", + .caps = V4L2_CAP_META_OUTPUT, + .pad_flags = MEDIA_PAD_FL_SOURCE | MEDIA_PAD_FL_MUST_CONNECT, + .link_pad = FE_CONFIG_PAD + }, +}; + +#define is_fe_node(node) (((node)->id) >= FE_OUT0) +#define is_csi2_node(node) (!is_fe_node(node)) + +#define node_supports_image_output(node) \ + (node_desc[(node)->id].caps & V4L2_CAP_VIDEO_CAPTURE) +#define node_supports_meta_output(node) \ + (node_desc[(node)->id].caps & V4L2_CAP_META_CAPTURE) +#define node_supports_image_input(node) \ + (node_desc[(node)->id].caps & V4L2_CAP_VIDEO_OUTPUT) +#define node_supports_meta_input(node) \ + (node_desc[(node)->id].caps & V4L2_CAP_META_OUTPUT) +#define node_supports_image(node) \ + (node_supports_image_output(node) || node_supports_image_input(node)) +#define node_supports_meta(node) \ + (node_supports_meta_output(node) || node_supports_meta_input(node)) + +#define is_image_output_node(node) \ + ((node)->buffer_queue.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) +#define is_image_input_node(node) \ + ((node)->buffer_queue.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) +#define is_image_node(node) \ + (is_image_output_node(node) || is_image_input_node(node)) +#define is_meta_output_node(node) \ + ((node)->buffer_queue.type == V4L2_BUF_TYPE_META_CAPTURE) +#define is_meta_input_node(node) \ + ((node)->buffer_queue.type == V4L2_BUF_TYPE_META_OUTPUT) +#define is_meta_node(node) \ + (is_meta_output_node(node) || is_meta_input_node(node)) + +/* To track state across all nodes. */ +#define NODE_REGISTERED BIT(0) +#define NODE_ENABLED BIT(1) +#define NODE_STREAMING BIT(2) +#define FS_INT BIT(3) +#define FE_INT BIT(4) +#define NUM_STATES 5 + +struct cfe_buffer { + struct vb2_v4l2_buffer vb; + struct list_head list; +}; + +struct cfe_config_buffer { + struct cfe_buffer buf; + struct pisp_fe_config config; +}; + +static inline struct cfe_buffer *to_cfe_buffer(struct vb2_buffer *vb) +{ + return container_of(vb, struct cfe_buffer, vb.vb2_buf); +} + +static inline +struct cfe_config_buffer *to_cfe_config_buffer(struct cfe_buffer *buf) +{ + return container_of(buf, struct cfe_config_buffer, buf); +} + +struct cfe_node { + /* Node id */ + enum node_ids id; + /* Pointer pointing to current v4l2_buffer */ + struct cfe_buffer *cur_frm; + /* Pointer pointing to next v4l2_buffer */ + struct cfe_buffer *next_frm; + /* Used to store current pixel format */ + struct v4l2_format vid_fmt; + /* Used to store current meta format */ + struct v4l2_format meta_fmt; + /* Buffer queue used in video-buf */ + struct vb2_queue buffer_queue; + /* Queue of filled frames */ + struct list_head dma_queue; + /* lock used to access this structure */ + struct mutex lock; + /* Identifies video device for this channel */ + struct video_device video_dev; + /* Pointer to the parent handle */ + struct cfe_device *cfe; + /* Media pad for this node */ + struct media_pad pad; + /* Frame-start counter */ + unsigned int fs_count; + /* Timestamp of the current buffer */ + u64 ts; +}; + +struct cfe_device { + struct dentry *debugfs; + struct kref kref; + + /* peripheral base address */ + void __iomem *mipi_cfg_base; + + struct clk *clk; + + /* V4l2 device */ + struct v4l2_device v4l2_dev; + struct media_device mdev; + struct media_pipeline pipe; + + /* IRQ lock for node state and DMA queues */ + spinlock_t state_lock; + bool job_ready; + bool job_queued; + + /* parent device */ + struct platform_device *pdev; + /* subdevice async Notifier */ + struct v4l2_async_notifier notifier; + + /* Source sub device */ + struct v4l2_subdev *source_sd; + /* Source subdev's pad */ + u32 source_pad; + + struct cfe_node node[NUM_NODES]; + DECLARE_BITMAP(node_flags, NUM_STATES * NUM_NODES); + + struct csi2_device csi2; + struct pisp_fe_device fe; + + int fe_csi2_channel; + + /* Mask of enabled streams */ + u64 streams_mask; +}; + +static inline bool is_fe_enabled(struct cfe_device *cfe) +{ + return cfe->fe_csi2_channel != -1; +} + +static inline struct cfe_device *to_cfe_device(struct v4l2_device *v4l2_dev) +{ + return container_of(v4l2_dev, struct cfe_device, v4l2_dev); +} + +static inline u32 cfg_reg_read(struct cfe_device *cfe, u32 offset) +{ + return readl(cfe->mipi_cfg_base + offset); +} + +static inline void cfg_reg_write(struct cfe_device *cfe, u32 offset, u32 val) +{ + writel(val, cfe->mipi_cfg_base + offset); +} + +static bool check_state(struct cfe_device *cfe, unsigned long state, + unsigned int node_id) +{ + unsigned long bit; + + for_each_set_bit(bit, &state, sizeof(state)) { + if (!test_bit(bit + (node_id * NUM_STATES), cfe->node_flags)) + return false; + } + + return true; +} + +static void set_state(struct cfe_device *cfe, unsigned long state, + unsigned int node_id) +{ + unsigned long bit; + + for_each_set_bit(bit, &state, sizeof(state)) + set_bit(bit + (node_id * NUM_STATES), cfe->node_flags); +} + +static void clear_state(struct cfe_device *cfe, unsigned long state, + unsigned int node_id) +{ + unsigned long bit; + + for_each_set_bit(bit, &state, sizeof(state)) + clear_bit(bit + (node_id * NUM_STATES), cfe->node_flags); +} + +static bool test_any_node(struct cfe_device *cfe, unsigned long cond) +{ + for (unsigned int i = 0; i < NUM_NODES; i++) { + if (check_state(cfe, cond, i)) + return true; + } + + return false; +} + +static bool test_all_nodes(struct cfe_device *cfe, unsigned long precond, + unsigned long cond) +{ + for (unsigned int i = 0; i < NUM_NODES; i++) { + if (check_state(cfe, precond, i)) { + if (!check_state(cfe, cond, i)) + return false; + } + } + + return true; +} + +static int mipi_cfg_regs_show(struct seq_file *s, void *data) +{ + struct cfe_device *cfe = s->private; + int ret; + + ret = pm_runtime_resume_and_get(&cfe->pdev->dev); + if (ret) + return ret; + +#define DUMP(reg) seq_printf(s, #reg " \t0x%08x\n", cfg_reg_read(cfe, reg)) + DUMP(MIPICFG_CFG); + DUMP(MIPICFG_INTR); + DUMP(MIPICFG_INTE); + DUMP(MIPICFG_INTF); + DUMP(MIPICFG_INTS); +#undef DUMP + + pm_runtime_put(&cfe->pdev->dev); + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(mipi_cfg_regs); + +/* Format setup functions */ +const struct cfe_fmt *find_format_by_code(u32 code) +{ + for (unsigned int i = 0; i < ARRAY_SIZE(formats); i++) { + if (formats[i].code == code) + return &formats[i]; + } + + return NULL; +} + +const struct cfe_fmt *find_format_by_pix(u32 pixelformat) +{ + for (unsigned int i = 0; i < ARRAY_SIZE(formats); i++) { + if (formats[i].fourcc == pixelformat) + return &formats[i]; + } + + return NULL; +} + +static const struct cfe_fmt *find_format_by_code_and_fourcc(u32 code, + u32 fourcc) +{ + for (unsigned int i = 0; i < ARRAY_SIZE(formats); i++) { + if (formats[i].code == code && formats[i].fourcc == fourcc) + return &formats[i]; + } + + return NULL; +} + +/* + * Given the mbus code, find the 16 bit remapped code. Returns 0 if no remap + * possible. + */ +u32 cfe_find_16bit_code(u32 code) +{ + const struct cfe_fmt *cfe_fmt; + + cfe_fmt = find_format_by_code(code); + + if (!cfe_fmt || !cfe_fmt->remap[CFE_REMAP_16BIT]) + return 0; + + cfe_fmt = find_format_by_pix(cfe_fmt->remap[CFE_REMAP_16BIT]); + if (!cfe_fmt) + return 0; + + return cfe_fmt->code; +} + +/* + * Given the mbus code, find the 8 bit compressed code. Returns 0 if no remap + * possible. + */ +u32 cfe_find_compressed_code(u32 code) +{ + const struct cfe_fmt *cfe_fmt; + + cfe_fmt = find_format_by_code(code); + + if (!cfe_fmt || !cfe_fmt->remap[CFE_REMAP_COMPRESSED]) + return 0; + + cfe_fmt = find_format_by_pix(cfe_fmt->remap[CFE_REMAP_COMPRESSED]); + if (!cfe_fmt) + return 0; + + return cfe_fmt->code; +} + +static void cfe_calc_vid_format_size_bpl(struct cfe_device *cfe, + const struct cfe_fmt *fmt, + struct v4l2_format *f) +{ + unsigned int min_bytesperline; + + v4l_bound_align_image(&f->fmt.pix.width, MIN_WIDTH, MAX_WIDTH, 2, + &f->fmt.pix.height, MIN_HEIGHT, MAX_HEIGHT, 0, 0); + + min_bytesperline = + ALIGN((f->fmt.pix.width * fmt->depth) >> 3, BPL_ALIGNMENT); + + if (f->fmt.pix.bytesperline > min_bytesperline && + f->fmt.pix.bytesperline <= MAX_BYTESPERLINE) + f->fmt.pix.bytesperline = + ALIGN(f->fmt.pix.bytesperline, BPL_ALIGNMENT); + else + f->fmt.pix.bytesperline = min_bytesperline; + + f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; + + cfe_dbg(cfe, "%s: %p4cc size: %ux%u bpl:%u img_size:%u\n", __func__, + &f->fmt.pix.pixelformat, f->fmt.pix.width, f->fmt.pix.height, + f->fmt.pix.bytesperline, f->fmt.pix.sizeimage); +} + +static void cfe_calc_meta_format_size_bpl(struct cfe_device *cfe, + const struct cfe_fmt *fmt, + struct v4l2_format *f) +{ + v4l_bound_align_image(&f->fmt.meta.width, MIN_META_WIDTH, MAX_WIDTH, 2, + &f->fmt.meta.height, MIN_META_HEIGHT, MAX_HEIGHT, + 0, 0); + + f->fmt.meta.bytesperline = (f->fmt.meta.width * fmt->depth) >> 3; + f->fmt.meta.buffersize = f->fmt.meta.height * f->fmt.pix.bytesperline; + + cfe_dbg(cfe, "%s: %p4cc size: %ux%u bpl:%u buf_size:%u\n", __func__, + &f->fmt.meta.dataformat, f->fmt.meta.width, f->fmt.meta.height, + f->fmt.meta.bytesperline, f->fmt.meta.buffersize); +} + +static void cfe_schedule_next_csi2_job(struct cfe_device *cfe) +{ + struct cfe_buffer *buf; + dma_addr_t addr; + + for (unsigned int i = 0; i < CSI2_NUM_CHANNELS; i++) { + struct cfe_node *node = &cfe->node[i]; + unsigned int stride, size; + + if (!check_state(cfe, NODE_STREAMING, i)) + continue; + + buf = list_first_entry(&node->dma_queue, struct cfe_buffer, + list); + node->next_frm = buf; + list_del(&buf->list); + + trace_cfe_csi2_schedule(node->id, &buf->vb.vb2_buf); + + if (is_meta_node(node)) { + size = node->meta_fmt.fmt.meta.buffersize; + /* We use CSI2_CH_CTRL_PACK_BYTES, so stride == 0 */ + stride = 0; + } else { + size = node->vid_fmt.fmt.pix.sizeimage; + stride = node->vid_fmt.fmt.pix.bytesperline; + } + + addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0); + csi2_set_buffer(&cfe->csi2, node->id, addr, stride, size); + } +} + +static void cfe_schedule_next_pisp_job(struct cfe_device *cfe) +{ + struct vb2_buffer *vb2_bufs[FE_NUM_PADS] = { 0 }; + struct cfe_config_buffer *config_buf; + struct cfe_buffer *buf; + + for (unsigned int i = CSI2_NUM_CHANNELS; i < NUM_NODES; i++) { + struct cfe_node *node = &cfe->node[i]; + + if (!check_state(cfe, NODE_STREAMING, i)) + continue; + + buf = list_first_entry(&node->dma_queue, struct cfe_buffer, + list); + + trace_cfe_fe_schedule(node->id, &buf->vb.vb2_buf); + + node->next_frm = buf; + vb2_bufs[node_desc[i].link_pad] = &buf->vb.vb2_buf; + list_del(&buf->list); + } + + config_buf = to_cfe_config_buffer(cfe->node[FE_CONFIG].next_frm); + pisp_fe_submit_job(&cfe->fe, vb2_bufs, &config_buf->config); +} + +static bool cfe_check_job_ready(struct cfe_device *cfe) +{ + for (unsigned int i = 0; i < NUM_NODES; i++) { + struct cfe_node *node = &cfe->node[i]; + + if (!check_state(cfe, NODE_ENABLED, i)) + continue; + + if (list_empty(&node->dma_queue)) + return false; + } + + return true; +} + +static void cfe_prepare_next_job(struct cfe_device *cfe) +{ + trace_cfe_prepare_next_job(is_fe_enabled(cfe)); + + cfe->job_queued = true; + cfe_schedule_next_csi2_job(cfe); + if (is_fe_enabled(cfe)) + cfe_schedule_next_pisp_job(cfe); + + /* Flag if another job is ready after this. */ + cfe->job_ready = cfe_check_job_ready(cfe); +} + +static void cfe_process_buffer_complete(struct cfe_node *node, + enum vb2_buffer_state state) +{ + trace_cfe_buffer_complete(node->id, &node->cur_frm->vb); + + node->cur_frm->vb.sequence = node->fs_count - 1; + vb2_buffer_done(&node->cur_frm->vb.vb2_buf, state); +} + +static void cfe_queue_event_sof(struct cfe_node *node) +{ + struct v4l2_event event = { + .type = V4L2_EVENT_FRAME_SYNC, + .u.frame_sync.frame_sequence = node->fs_count - 1, + }; + + v4l2_event_queue(&node->video_dev, &event); +} + +static void cfe_sof_isr(struct cfe_node *node) +{ + struct cfe_device *cfe = node->cfe; + bool matching_fs = true; + + trace_cfe_frame_start(node->id, node->fs_count); + + /* + * If the sensor is producing unexpected frame event ordering over a + * sustained period of time, guard against the possibility of coming + * here and orphaning the cur_frm if it's not been dequeued already. + * Unfortunately, there is not enough hardware state to tell if this + * may have occurred. + */ + if (WARN(node->cur_frm, "%s: [%s] Orphaned frame at seq %u\n", + __func__, node_desc[node->id].name, node->fs_count)) + cfe_process_buffer_complete(node, VB2_BUF_STATE_ERROR); + + node->cur_frm = node->next_frm; + node->next_frm = NULL; + node->fs_count++; + + node->ts = ktime_get_ns(); + for (unsigned int i = 0; i < NUM_NODES; i++) { + if (!check_state(cfe, NODE_STREAMING, i) || i == node->id) + continue; + /* + * This checks if any other node has seen a FS. If yes, use the + * same timestamp, eventually across all node buffers. + */ + if (cfe->node[i].fs_count >= node->fs_count) + node->ts = cfe->node[i].ts; + /* + * This checks if all other node have seen a matching FS. If + * yes, we can flag another job to be queued. + */ + if (matching_fs && cfe->node[i].fs_count != node->fs_count) + matching_fs = false; + } + + if (matching_fs) + cfe->job_queued = false; + + if (node->cur_frm) + node->cur_frm->vb.vb2_buf.timestamp = node->ts; + + set_state(cfe, FS_INT, node->id); + clear_state(cfe, FE_INT, node->id); + + if (is_image_output_node(node)) + cfe_queue_event_sof(node); +} + +static void cfe_eof_isr(struct cfe_node *node) +{ + struct cfe_device *cfe = node->cfe; + + trace_cfe_frame_end(node->id, node->fs_count - 1); + + if (node->cur_frm) + cfe_process_buffer_complete(node, VB2_BUF_STATE_DONE); + + node->cur_frm = NULL; + set_state(cfe, FE_INT, node->id); + clear_state(cfe, FS_INT, node->id); +} + +static irqreturn_t cfe_isr(int irq, void *dev) +{ + struct cfe_device *cfe = dev; + bool sof[NUM_NODES] = { 0 }, eof[NUM_NODES] = { 0 }; + u32 sts; + + sts = cfg_reg_read(cfe, MIPICFG_INTS); + + if (sts & MIPICFG_INT_CSI_DMA) + csi2_isr(&cfe->csi2, sof, eof); + + if (sts & MIPICFG_INT_PISP_FE) + pisp_fe_isr(&cfe->fe, sof + CSI2_NUM_CHANNELS, + eof + CSI2_NUM_CHANNELS); + + spin_lock(&cfe->state_lock); + + for (unsigned int i = 0; i < NUM_NODES; i++) { + struct cfe_node *node = &cfe->node[i]; + + /* + * The check_state(NODE_STREAMING) is to ensure we do not loop + * over the CSI2_CHx nodes when the FE is active since they + * generate interrupts even though the node is not streaming. + */ + if (!check_state(cfe, NODE_STREAMING, i) || !(sof[i] || eof[i])) + continue; + + /* + * There are 3 cases where we could get FS + FE_ACK at + * the same time: + * 1) FE of the current frame, and FS of the next frame. + * 2) FS + FE of the same frame. + * 3) FE of the current frame, and FS + FE of the next + * frame. To handle this, see the sof handler below. + * + * (1) is handled implicitly by the ordering of the FE and FS + * handlers below. + */ + if (eof[i]) { + /* + * The condition below tests for (2). Run the FS handler + * first before the FE handler, both for the current + * frame. + */ + if (sof[i] && !check_state(cfe, FS_INT, i)) { + cfe_sof_isr(node); + sof[i] = false; + } + + cfe_eof_isr(node); + } + + if (sof[i]) { + /* + * The condition below tests for (3). In such cases, we + * come in here with FS flag set in the node state from + * the previous frame since it only gets cleared in + * cfe_eof_isr(). Handle the FE for the previous + * frame first before the FS handler for the current + * frame. + */ + if (check_state(cfe, FS_INT, node->id) && + !check_state(cfe, FE_INT, node->id)) { + cfe_dbg(cfe, "%s: [%s] Handling missing previous FE interrupt\n", + __func__, node_desc[node->id].name); + cfe_eof_isr(node); + } + + cfe_sof_isr(node); + } + + if (!cfe->job_queued && cfe->job_ready) + cfe_prepare_next_job(cfe); + } + + spin_unlock(&cfe->state_lock); + + return IRQ_HANDLED; +} + +/* + * Stream helpers + */ + +static int cfe_get_vc_dt_fallback(struct cfe_device *cfe, u8 *vc, u8 *dt) +{ + struct v4l2_subdev_state *state; + struct v4l2_mbus_framefmt *fmt; + const struct cfe_fmt *cfe_fmt; + + state = v4l2_subdev_get_locked_active_state(&cfe->csi2.sd); + + fmt = v4l2_subdev_state_get_format(state, CSI2_PAD_SINK, 0); + if (!fmt) + return -EINVAL; + + cfe_fmt = find_format_by_code(fmt->code); + if (!cfe_fmt) + return -EINVAL; + + *vc = 0; + *dt = cfe_fmt->csi_dt; + + return 0; +} + +static int cfe_get_vc_dt(struct cfe_device *cfe, unsigned int channel, u8 *vc, + u8 *dt) +{ + struct v4l2_mbus_frame_desc remote_desc; + struct v4l2_subdev_state *state; + u32 sink_stream; + unsigned int i; + int ret; + + state = v4l2_subdev_get_locked_active_state(&cfe->csi2.sd); + + ret = v4l2_subdev_routing_find_opposite_end(&state->routing, + CSI2_PAD_FIRST_SOURCE + channel, 0, NULL, &sink_stream); + if (ret) + return ret; + + ret = v4l2_subdev_call(cfe->source_sd, pad, get_frame_desc, + cfe->source_pad, &remote_desc); + if (ret == -ENOIOCTLCMD) { + cfe_dbg(cfe, "source does not support get_frame_desc, use fallback\n"); + return cfe_get_vc_dt_fallback(cfe, vc, dt); + } else if (ret) { + cfe_err(cfe, "Failed to get frame descriptor\n"); + return ret; + } + + if (remote_desc.type != V4L2_MBUS_FRAME_DESC_TYPE_CSI2) { + cfe_err(cfe, "Frame descriptor does not describe CSI-2 link"); + return -EINVAL; + } + + for (i = 0; i < remote_desc.num_entries; i++) { + if (remote_desc.entry[i].stream == sink_stream) + break; + } + + if (i == remote_desc.num_entries) { + cfe_err(cfe, "Stream %u not found in remote frame desc\n", + sink_stream); + return -EINVAL; + } + + *vc = remote_desc.entry[i].bus.csi2.vc; + *dt = remote_desc.entry[i].bus.csi2.dt; + + return 0; +} + +static int cfe_start_channel(struct cfe_node *node) +{ + struct cfe_device *cfe = node->cfe; + struct v4l2_subdev_state *state; + struct v4l2_mbus_framefmt *source_fmt; + const struct cfe_fmt *fmt; + unsigned long flags; + bool start_fe; + int ret; + + cfe_dbg(cfe, "%s: [%s]\n", __func__, node_desc[node->id].name); + + start_fe = is_fe_enabled(cfe) && + test_all_nodes(cfe, NODE_ENABLED, NODE_STREAMING); + + state = v4l2_subdev_get_locked_active_state(&cfe->csi2.sd); + + if (start_fe) { + unsigned int width, height; + u8 vc, dt; + + cfe_dbg(cfe, "%s: %s using csi2 channel %d\n", __func__, + node_desc[FE_OUT0].name, cfe->fe_csi2_channel); + + ret = cfe_get_vc_dt(cfe, cfe->fe_csi2_channel, &vc, &dt); + if (ret) + return ret; + + source_fmt = v4l2_subdev_state_get_format(state, + node_desc[cfe->fe_csi2_channel].link_pad); + fmt = find_format_by_code(source_fmt->code); + + width = source_fmt->width; + height = source_fmt->height; + + /* Must have a valid CSI2 datatype. */ + WARN_ON(!fmt->csi_dt); + + /* + * Start the associated CSI2 Channel as well. + * + * Must write to the ADDR register to latch the ctrl values + * even if we are connected to the front end. Once running, + * this is handled by the CSI2 AUTO_ARM mode. + */ + csi2_start_channel(&cfe->csi2, cfe->fe_csi2_channel, + CSI2_MODE_FE_STREAMING, + true, false, width, height, vc, dt); + csi2_set_buffer(&cfe->csi2, cfe->fe_csi2_channel, 0, 0, -1); + pisp_fe_start(&cfe->fe); + } + + if (is_csi2_node(node)) { + unsigned int width = 0, height = 0; + u8 vc, dt; + + ret = cfe_get_vc_dt(cfe, node->id, &vc, &dt); + if (ret) { + if (start_fe) { + csi2_stop_channel(&cfe->csi2, + cfe->fe_csi2_channel); + pisp_fe_stop(&cfe->fe); + } + + return ret; + } + + u32 mode = CSI2_MODE_NORMAL; + + source_fmt = v4l2_subdev_state_get_format(state, + node_desc[node->id].link_pad); + fmt = find_format_by_code(source_fmt->code); + + /* Must have a valid CSI2 datatype. */ + WARN_ON(!fmt->csi_dt); + + if (is_image_output_node(node)) { + u32 pixfmt; + + width = source_fmt->width; + height = source_fmt->height; + + pixfmt = node->vid_fmt.fmt.pix.pixelformat; + + if (pixfmt == fmt->remap[CFE_REMAP_16BIT]) { + mode = CSI2_MODE_REMAP; + } else if (pixfmt == fmt->remap[CFE_REMAP_COMPRESSED]) { + mode = CSI2_MODE_COMPRESSED; + csi2_set_compression(&cfe->csi2, node->id, + CSI2_COMPRESSION_DELTA, 0, + 0); + } + } + /* Unconditionally start this CSI2 channel. */ + csi2_start_channel(&cfe->csi2, node->id, + mode, + /* Auto arm */ + false, + /* Pack bytes */ + is_meta_node(node) ? true : false, + width, height, vc, dt); + } + + spin_lock_irqsave(&cfe->state_lock, flags); + if (cfe->job_ready && test_all_nodes(cfe, NODE_ENABLED, NODE_STREAMING)) + cfe_prepare_next_job(cfe); + spin_unlock_irqrestore(&cfe->state_lock, flags); + + return 0; +} + +static void cfe_stop_channel(struct cfe_node *node, bool fe_stop) +{ + struct cfe_device *cfe = node->cfe; + + cfe_dbg(cfe, "%s: [%s] fe_stop %u\n", __func__, + node_desc[node->id].name, fe_stop); + + if (fe_stop) { + csi2_stop_channel(&cfe->csi2, cfe->fe_csi2_channel); + pisp_fe_stop(&cfe->fe); + } + + if (is_csi2_node(node)) + csi2_stop_channel(&cfe->csi2, node->id); +} + +static void cfe_return_buffers(struct cfe_node *node, + enum vb2_buffer_state state) +{ + struct cfe_device *cfe = node->cfe; + struct cfe_buffer *buf, *tmp; + unsigned long flags; + + cfe_dbg(cfe, "%s: [%s]\n", __func__, node_desc[node->id].name); + + spin_lock_irqsave(&cfe->state_lock, flags); + list_for_each_entry_safe(buf, tmp, &node->dma_queue, list) { + list_del(&buf->list); + trace_cfe_return_buffer(node->id, buf->vb.vb2_buf.index, 2); + vb2_buffer_done(&buf->vb.vb2_buf, state); + } + + if (node->cur_frm) { + trace_cfe_return_buffer(node->id, + node->cur_frm->vb.vb2_buf.index, 0); + vb2_buffer_done(&node->cur_frm->vb.vb2_buf, state); + } + if (node->next_frm && node->cur_frm != node->next_frm) { + trace_cfe_return_buffer(node->id, + node->next_frm->vb.vb2_buf.index, 1); + vb2_buffer_done(&node->next_frm->vb.vb2_buf, state); + } + + node->cur_frm = NULL; + node->next_frm = NULL; + spin_unlock_irqrestore(&cfe->state_lock, flags); +} + +/* + * vb2 ops + */ + +static int cfe_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, + unsigned int *nplanes, unsigned int sizes[], + struct device *alloc_devs[]) +{ + struct cfe_node *node = vb2_get_drv_priv(vq); + struct cfe_device *cfe = node->cfe; + unsigned int size = is_image_node(node) ? + node->vid_fmt.fmt.pix.sizeimage : + node->meta_fmt.fmt.meta.buffersize; + + cfe_dbg(cfe, "%s: [%s] type:%u\n", __func__, node_desc[node->id].name, + node->buffer_queue.type); + + if (vq->max_num_buffers + *nbuffers < 3) + *nbuffers = 3 - vq->max_num_buffers; + + if (*nplanes) { + if (sizes[0] < size) { + cfe_err(cfe, "sizes[0] %i < size %u\n", sizes[0], size); + return -EINVAL; + } + size = sizes[0]; + } + + *nplanes = 1; + sizes[0] = size; + + return 0; +} + +static int cfe_buffer_prepare(struct vb2_buffer *vb) +{ + struct cfe_node *node = vb2_get_drv_priv(vb->vb2_queue); + struct cfe_device *cfe = node->cfe; + struct cfe_buffer *buf = to_cfe_buffer(vb); + unsigned long size; + + trace_cfe_buffer_prepare(node->id, vb); + + size = is_image_node(node) ? node->vid_fmt.fmt.pix.sizeimage : + node->meta_fmt.fmt.meta.buffersize; + if (vb2_plane_size(vb, 0) < size) { + cfe_err(cfe, "data will not fit into plane (%lu < %lu)\n", + vb2_plane_size(vb, 0), size); + return -EINVAL; + } + + vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); + + if (node->id == FE_CONFIG) { + struct cfe_config_buffer *b = to_cfe_config_buffer(buf); + void *addr = vb2_plane_vaddr(vb, 0); + + memcpy(&b->config, addr, sizeof(struct pisp_fe_config)); + return pisp_fe_validate_config(&cfe->fe, &b->config, + &cfe->node[FE_OUT0].vid_fmt, + &cfe->node[FE_OUT1].vid_fmt); + } + + return 0; +} + +static void cfe_buffer_queue(struct vb2_buffer *vb) +{ + struct cfe_node *node = vb2_get_drv_priv(vb->vb2_queue); + struct cfe_device *cfe = node->cfe; + struct cfe_buffer *buf = to_cfe_buffer(vb); + unsigned long flags; + bool schedule_now; + + spin_lock_irqsave(&cfe->state_lock, flags); + + list_add_tail(&buf->list, &node->dma_queue); + + if (!cfe->job_ready) + cfe->job_ready = cfe_check_job_ready(cfe); + + schedule_now = !cfe->job_queued && cfe->job_ready && + test_all_nodes(cfe, NODE_ENABLED, NODE_STREAMING); + + trace_cfe_buffer_queue(node->id, vb, schedule_now); + + if (schedule_now) + cfe_prepare_next_job(cfe); + + spin_unlock_irqrestore(&cfe->state_lock, flags); +} + +static s64 cfe_get_source_link_freq(struct cfe_device *cfe) +{ + struct media_pad *src_pad = + &cfe->source_sd->entity.pads[cfe->source_pad]; + struct v4l2_subdev_state *state; + s64 link_freq; + u32 bpp; + + state = v4l2_subdev_get_locked_active_state(&cfe->csi2.sd); + + /* + * v4l2_get_link_freq() uses V4L2_CID_LINK_FREQ first, and falls back + * to V4L2_CID_PIXEL_RATE if V4L2_CID_LINK_FREQ is not available. + * + * With multistream input there is no single pixel rate, and thus we + * cannot use V4L2_CID_PIXEL_RATE, so we pass 0 as the bpp which + * causes v4l2_get_link_freq() to return an error if it falls back to + * V4L2_CID_PIXEL_RATE. + */ + + if (state->routing.num_routes == 1) { + struct v4l2_subdev_route *route = &state->routing.routes[0]; + struct v4l2_mbus_framefmt *source_fmt; + const struct cfe_fmt *fmt; + + source_fmt = v4l2_subdev_state_get_format(state, + route->sink_pad, + route->sink_stream); + + fmt = find_format_by_code(source_fmt->code); + if (!fmt) + return -EINVAL; + + bpp = fmt->depth; + } else { + bpp = 0; + } + + link_freq = v4l2_get_link_freq(src_pad, bpp, + 2 * cfe->csi2.dphy.active_lanes); + if (link_freq < 0) + cfe_err(cfe, "failed to get link freq for subdev '%s'\n", + cfe->source_sd->name); + + return link_freq; +} + +static int cfe_start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct v4l2_mbus_config mbus_config = { 0 }; + struct cfe_node *node = vb2_get_drv_priv(vq); + struct cfe_device *cfe = node->cfe; + struct v4l2_subdev_state *state; + struct v4l2_subdev_route *route; + s64 link_freq; + int ret; + + cfe_dbg(cfe, "%s: [%s]\n", __func__, node_desc[node->id].name); + + if (!check_state(cfe, NODE_ENABLED, node->id)) { + cfe_err(cfe, "%s node link is not enabled.\n", + node_desc[node->id].name); + ret = -EINVAL; + goto err_streaming; + } + + ret = pm_runtime_resume_and_get(&cfe->pdev->dev); + if (ret < 0) { + cfe_err(cfe, "pm_runtime_resume_and_get failed\n"); + goto err_streaming; + } + + /* When using the Frontend, we must enable the FE_CONFIG node. */ + if (is_fe_enabled(cfe) && + !check_state(cfe, NODE_ENABLED, cfe->node[FE_CONFIG].id)) { + cfe_err(cfe, "FE enabled, but FE_CONFIG node is not\n"); + ret = -EINVAL; + goto err_pm_put; + } + + ret = media_pipeline_start(&node->pad, &cfe->pipe); + if (ret < 0) { + cfe_err(cfe, "Failed to start media pipeline: %d\n", ret); + goto err_pm_put; + } + + state = v4l2_subdev_lock_and_get_active_state(&cfe->csi2.sd); + + clear_state(cfe, FS_INT | FE_INT, node->id); + set_state(cfe, NODE_STREAMING, node->id); + node->fs_count = 0; + + ret = cfe_start_channel(node); + if (ret) + goto err_unlock_state; + + if (!test_all_nodes(cfe, NODE_ENABLED, NODE_STREAMING)) { + cfe_dbg(cfe, "Streaming on hold, as all nodes are not set to streaming yet\n"); + v4l2_subdev_unlock_state(state); + return 0; + } + + cfg_reg_write(cfe, MIPICFG_CFG, MIPICFG_CFG_SEL_CSI); + cfg_reg_write(cfe, MIPICFG_INTE, + MIPICFG_INT_CSI_DMA | MIPICFG_INT_PISP_FE); + + ret = v4l2_subdev_call(cfe->source_sd, pad, get_mbus_config, 0, + &mbus_config); + if (ret < 0 && ret != -ENOIOCTLCMD) { + cfe_err(cfe, "g_mbus_config failed\n"); + goto err_clear_inte; + } + + cfe->csi2.dphy.active_lanes = mbus_config.bus.mipi_csi2.num_data_lanes; + if (!cfe->csi2.dphy.active_lanes) + cfe->csi2.dphy.active_lanes = cfe->csi2.dphy.max_lanes; + if (cfe->csi2.dphy.active_lanes > cfe->csi2.dphy.max_lanes) { + cfe_err(cfe, "Device has requested %u data lanes, which is >%u configured in DT\n", + cfe->csi2.dphy.active_lanes, cfe->csi2.dphy.max_lanes); + ret = -EINVAL; + goto err_clear_inte; + } + + link_freq = cfe_get_source_link_freq(cfe); + if (link_freq < 0) + goto err_clear_inte; + + cfe->csi2.dphy.dphy_rate = div_s64(link_freq * 2, 1000000); + csi2_open_rx(&cfe->csi2); + + cfe->streams_mask = 0; + + for_each_active_route(&state->routing, route) + cfe->streams_mask |= BIT_ULL(route->sink_stream); + + ret = v4l2_subdev_enable_streams(cfe->source_sd, cfe->source_pad, + cfe->streams_mask); + if (ret) { + cfe_err(cfe, "stream on failed in subdev\n"); + goto err_disable_cfe; + } + + cfe_dbg(cfe, "Streaming enabled\n"); + + v4l2_subdev_unlock_state(state); + + return 0; + +err_disable_cfe: + csi2_close_rx(&cfe->csi2); +err_clear_inte: + cfg_reg_write(cfe, MIPICFG_INTE, 0); + + cfe_stop_channel(node, + is_fe_enabled(cfe) && test_all_nodes(cfe, NODE_ENABLED, + NODE_STREAMING)); +err_unlock_state: + v4l2_subdev_unlock_state(state); + media_pipeline_stop(&node->pad); +err_pm_put: + pm_runtime_put(&cfe->pdev->dev); +err_streaming: + cfe_return_buffers(node, VB2_BUF_STATE_QUEUED); + clear_state(cfe, NODE_STREAMING, node->id); + + return ret; +} + +static void cfe_stop_streaming(struct vb2_queue *vq) +{ + struct cfe_node *node = vb2_get_drv_priv(vq); + struct cfe_device *cfe = node->cfe; + unsigned long flags; + bool fe_stop; + + cfe_dbg(cfe, "%s: [%s]\n", __func__, node_desc[node->id].name); + + spin_lock_irqsave(&cfe->state_lock, flags); + fe_stop = is_fe_enabled(cfe) && + test_all_nodes(cfe, NODE_ENABLED, NODE_STREAMING); + + cfe->job_ready = false; + clear_state(cfe, NODE_STREAMING, node->id); + spin_unlock_irqrestore(&cfe->state_lock, flags); + + cfe_stop_channel(node, fe_stop); + + if (!test_any_node(cfe, NODE_STREAMING)) { + struct v4l2_subdev_state *state; + int ret; + + state = v4l2_subdev_lock_and_get_active_state(&cfe->csi2.sd); + + ret = v4l2_subdev_disable_streams(cfe->source_sd, + cfe->source_pad, + cfe->streams_mask); + if (ret) + cfe_err(cfe, "stream disable failed in subdev\n"); + + v4l2_subdev_unlock_state(state); + + csi2_close_rx(&cfe->csi2); + + cfg_reg_write(cfe, MIPICFG_INTE, 0); + + cfe_dbg(cfe, "%s: Streaming disabled\n", __func__); + } + + media_pipeline_stop(&node->pad); + + /* Clear all queued buffers for the node */ + cfe_return_buffers(node, VB2_BUF_STATE_ERROR); + + pm_runtime_put(&cfe->pdev->dev); +} + +static const struct vb2_ops cfe_video_qops = { + .queue_setup = cfe_queue_setup, + .buf_prepare = cfe_buffer_prepare, + .buf_queue = cfe_buffer_queue, + .start_streaming = cfe_start_streaming, + .stop_streaming = cfe_stop_streaming, +}; + +/* + * v4l2 ioctl ops + */ + +static int cfe_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + strscpy(cap->driver, CFE_MODULE_NAME, sizeof(cap->driver)); + strscpy(cap->card, CFE_MODULE_NAME, sizeof(cap->card)); + + cap->capabilities |= V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_META_CAPTURE | + V4L2_CAP_META_OUTPUT; + + return 0; +} + +static int cfe_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + struct cfe_node *node = video_drvdata(file); + struct cfe_device *cfe = node->cfe; + unsigned int i, j; + + if (!node_supports_image_output(node)) + return -EINVAL; + + cfe_dbg(cfe, "%s: [%s]\n", __func__, node_desc[node->id].name); + + for (i = 0, j = 0; i < ARRAY_SIZE(formats); i++) { + if (f->mbus_code && formats[i].code != f->mbus_code) + continue; + + if (formats[i].flags & CFE_FORMAT_FLAG_META_OUT || + formats[i].flags & CFE_FORMAT_FLAG_META_CAP) + continue; + + if (is_fe_node(node) && + !(formats[i].flags & CFE_FORMAT_FLAG_FE_OUT)) + continue; + + if (j == f->index) { + f->pixelformat = formats[i].fourcc; + f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + return 0; + } + j++; + } + + return -EINVAL; +} + +static int cfe_g_fmt(struct file *file, void *priv, struct v4l2_format *f) +{ + struct cfe_node *node = video_drvdata(file); + + if (!node_supports_image(node)) + return -EINVAL; + + *f = node->vid_fmt; + + return 0; +} + +static int cfe_validate_fmt_vid_cap(struct cfe_node *node, + struct v4l2_format *f) +{ + struct cfe_device *cfe = node->cfe; + const struct cfe_fmt *fmt; + + cfe_dbg(cfe, "%s: [%s] %ux%u, V4L2 pix %p4cc\n", __func__, + node_desc[node->id].name, f->fmt.pix.width, f->fmt.pix.height, + &f->fmt.pix.pixelformat); + + if (!node_supports_image_output(node)) + return -EINVAL; + + /* + * Default to a format that works for both CSI2 and FE. + */ + fmt = find_format_by_pix(f->fmt.pix.pixelformat); + if (!fmt) + fmt = find_format_by_code(MEDIA_BUS_FMT_SBGGR10_1X10); + + f->fmt.pix.pixelformat = fmt->fourcc; + + if (is_fe_node(node) && fmt->remap[CFE_REMAP_16BIT]) { + f->fmt.pix.pixelformat = fmt->remap[CFE_REMAP_16BIT]; + fmt = find_format_by_pix(f->fmt.pix.pixelformat); + } + + f->fmt.pix.field = V4L2_FIELD_NONE; + + cfe_calc_vid_format_size_bpl(cfe, fmt, f); + + return 0; +} + +static int cfe_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct cfe_node *node = video_drvdata(file); + struct cfe_device *cfe = node->cfe; + struct vb2_queue *q = &node->buffer_queue; + int ret; + + if (vb2_is_busy(q)) + return -EBUSY; + + ret = cfe_validate_fmt_vid_cap(node, f); + if (ret) + return ret; + + node->vid_fmt = *f; + + cfe_dbg(cfe, "%s: Set %ux%u, V4L2 pix %p4cc\n", __func__, + node->vid_fmt.fmt.pix.width, node->vid_fmt.fmt.pix.height, + &node->vid_fmt.fmt.pix.pixelformat); + + return 0; +} + +static int cfe_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct cfe_node *node = video_drvdata(file); + struct cfe_device *cfe = node->cfe; + + cfe_dbg(cfe, "%s: [%s]\n", __func__, node_desc[node->id].name); + + return cfe_validate_fmt_vid_cap(node, f); +} + +static int cfe_enum_fmt_meta(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + struct cfe_node *node = video_drvdata(file); + struct cfe_device *cfe = node->cfe; + + cfe_dbg(cfe, "%s: [%s]\n", __func__, node_desc[node->id].name); + + if (!node_supports_meta(node)) + return -EINVAL; + + switch (node->id) { + case CSI2_CH0...CSI2_CH3: + f->flags = V4L2_FMT_FLAG_META_LINE_BASED; + + switch (f->index) { + case 0: + f->pixelformat = V4L2_META_FMT_GENERIC_8; + return 0; + case 1: + f->pixelformat = V4L2_META_FMT_GENERIC_CSI2_10; + return 0; + case 2: + f->pixelformat = V4L2_META_FMT_GENERIC_CSI2_12; + return 0; + default: + return -EINVAL; + } + default: + break; + } + + if (f->index != 0) + return -EINVAL; + + switch (node->id) { + case FE_STATS: + f->pixelformat = V4L2_META_FMT_RPI_FE_STATS; + return 0; + case FE_CONFIG: + f->pixelformat = V4L2_META_FMT_RPI_FE_CFG; + return 0; + default: + return -EINVAL; + } +} + +static int cfe_validate_fmt_meta(struct cfe_node *node, struct v4l2_format *f) +{ + struct cfe_device *cfe = node->cfe; + const struct cfe_fmt *fmt; + + switch (node->id) { + case CSI2_CH0...CSI2_CH3: + cfe_dbg(cfe, "%s: [%s] %ux%u, V4L2 meta %p4cc\n", __func__, + node_desc[node->id].name, f->fmt.meta.width, + f->fmt.meta.height, &f->fmt.meta.dataformat); + break; + case FE_STATS: + case FE_CONFIG: + cfe_dbg(cfe, "%s: [%s] %u bytes, V4L2 meta %p4cc\n", __func__, + node_desc[node->id].name, f->fmt.meta.buffersize, + &f->fmt.meta.dataformat); + break; + default: + return -EINVAL; + } + + if (!node_supports_meta(node)) + return -EINVAL; + + switch (node->id) { + case CSI2_CH0...CSI2_CH3: + fmt = find_format_by_pix(f->fmt.meta.dataformat); + if (!fmt || !(fmt->flags & CFE_FORMAT_FLAG_META_CAP)) + fmt = find_format_by_pix(V4L2_META_FMT_GENERIC_CSI2_10); + + f->fmt.meta.dataformat = fmt->fourcc; + + cfe_calc_meta_format_size_bpl(cfe, fmt, f); + + return 0; + case FE_STATS: + f->fmt.meta.dataformat = V4L2_META_FMT_RPI_FE_STATS; + f->fmt.meta.buffersize = sizeof(struct pisp_statistics); + return 0; + case FE_CONFIG: + f->fmt.meta.dataformat = V4L2_META_FMT_RPI_FE_CFG; + f->fmt.meta.buffersize = sizeof(struct pisp_fe_config); + return 0; + default: + return -EINVAL; + } +} + +static int cfe_g_fmt_meta(struct file *file, void *priv, struct v4l2_format *f) +{ + struct cfe_node *node = video_drvdata(file); + struct cfe_device *cfe = node->cfe; + + cfe_dbg(cfe, "%s: [%s]\n", __func__, node_desc[node->id].name); + + if (!node_supports_meta(node)) + return -EINVAL; + + *f = node->meta_fmt; + + return 0; +} + +static int cfe_s_fmt_meta(struct file *file, void *priv, struct v4l2_format *f) +{ + struct cfe_node *node = video_drvdata(file); + struct cfe_device *cfe = node->cfe; + struct vb2_queue *q = &node->buffer_queue; + int ret; + + cfe_dbg(cfe, "%s: [%s]\n", __func__, node_desc[node->id].name); + + if (vb2_is_busy(q)) + return -EBUSY; + + if (!node_supports_meta(node)) + return -EINVAL; + + ret = cfe_validate_fmt_meta(node, f); + if (ret) + return ret; + + node->meta_fmt = *f; + + cfe_dbg(cfe, "%s: Set %p4cc\n", __func__, + &node->meta_fmt.fmt.meta.dataformat); + + return 0; +} + +static int cfe_try_fmt_meta(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct cfe_node *node = video_drvdata(file); + struct cfe_device *cfe = node->cfe; + + cfe_dbg(cfe, "%s: [%s]\n", __func__, node_desc[node->id].name); + return cfe_validate_fmt_meta(node, f); +} + +static int cfe_enum_framesizes(struct file *file, void *priv, + struct v4l2_frmsizeenum *fsize) +{ + struct cfe_node *node = video_drvdata(file); + struct cfe_device *cfe = node->cfe; + const struct cfe_fmt *fmt; + + cfe_dbg(cfe, "%s [%s]\n", __func__, node_desc[node->id].name); + + if (fsize->index > 0) + return -EINVAL; + + /* check for valid format */ + fmt = find_format_by_pix(fsize->pixel_format); + if (!fmt) { + cfe_dbg(cfe, "Invalid pixel code: %x\n", fsize->pixel_format); + return -EINVAL; + } + + /* TODO: Do we have limits on the step_width? */ + + fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; + fsize->stepwise.min_width = MIN_WIDTH; + fsize->stepwise.max_width = MAX_WIDTH; + fsize->stepwise.step_width = 2; + fsize->stepwise.min_height = MIN_HEIGHT; + fsize->stepwise.max_height = MAX_HEIGHT; + fsize->stepwise.step_height = 1; + + return 0; +} + +static int cfe_vb2_ioctl_reqbufs(struct file *file, void *priv, + struct v4l2_requestbuffers *p) +{ + struct video_device *vdev = video_devdata(file); + struct cfe_node *node = video_get_drvdata(vdev); + struct cfe_device *cfe = node->cfe; + int ret; + + cfe_dbg(cfe, "%s: [%s] type:%u\n", __func__, node_desc[node->id].name, + p->type); + + if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && + p->type != V4L2_BUF_TYPE_META_CAPTURE && + p->type != V4L2_BUF_TYPE_META_OUTPUT) + return -EINVAL; + + ret = vb2_queue_change_type(vdev->queue, p->type); + if (ret) + return ret; + + return vb2_ioctl_reqbufs(file, priv, p); +} + +static int cfe_vb2_ioctl_create_bufs(struct file *file, void *priv, + struct v4l2_create_buffers *p) +{ + struct video_device *vdev = video_devdata(file); + struct cfe_node *node = video_get_drvdata(vdev); + struct cfe_device *cfe = node->cfe; + int ret; + + cfe_dbg(cfe, "%s: [%s] type:%u\n", __func__, node_desc[node->id].name, + p->format.type); + + if (p->format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE && + p->format.type != V4L2_BUF_TYPE_META_CAPTURE && + p->format.type != V4L2_BUF_TYPE_META_OUTPUT) + return -EINVAL; + + ret = vb2_queue_change_type(vdev->queue, p->format.type); + if (ret) + return ret; + + return vb2_ioctl_create_bufs(file, priv, p); +} + +static int cfe_subscribe_event(struct v4l2_fh *fh, + const struct v4l2_event_subscription *sub) +{ + struct cfe_node *node = video_get_drvdata(fh->vdev); + + switch (sub->type) { + case V4L2_EVENT_FRAME_SYNC: + if (!node_supports_image_output(node)) + break; + + return v4l2_event_subscribe(fh, sub, 2, NULL); + case V4L2_EVENT_SOURCE_CHANGE: + if (!node_supports_image_output(node) && + !node_supports_meta_output(node)) + break; + + return v4l2_event_subscribe(fh, sub, 4, NULL); + } + + return v4l2_ctrl_subscribe_event(fh, sub); +} + +static const struct v4l2_ioctl_ops cfe_ioctl_ops = { + .vidioc_querycap = cfe_querycap, + .vidioc_enum_fmt_vid_cap = cfe_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = cfe_g_fmt, + .vidioc_s_fmt_vid_cap = cfe_s_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = cfe_try_fmt_vid_cap, + + .vidioc_enum_fmt_meta_cap = cfe_enum_fmt_meta, + .vidioc_g_fmt_meta_cap = cfe_g_fmt_meta, + .vidioc_s_fmt_meta_cap = cfe_s_fmt_meta, + .vidioc_try_fmt_meta_cap = cfe_try_fmt_meta, + + .vidioc_enum_fmt_meta_out = cfe_enum_fmt_meta, + .vidioc_g_fmt_meta_out = cfe_g_fmt_meta, + .vidioc_s_fmt_meta_out = cfe_s_fmt_meta, + .vidioc_try_fmt_meta_out = cfe_try_fmt_meta, + + .vidioc_enum_framesizes = cfe_enum_framesizes, + + .vidioc_reqbufs = cfe_vb2_ioctl_reqbufs, + .vidioc_create_bufs = cfe_vb2_ioctl_create_bufs, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_expbuf = vb2_ioctl_expbuf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + + .vidioc_subscribe_event = cfe_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +static void cfe_notify(struct v4l2_subdev *sd, unsigned int notification, + void *arg) +{ + struct cfe_device *cfe = to_cfe_device(sd->v4l2_dev); + + switch (notification) { + case V4L2_DEVICE_NOTIFY_EVENT: + for (unsigned int i = 0; i < NUM_NODES; i++) { + struct cfe_node *node = &cfe->node[i]; + + if (check_state(cfe, NODE_REGISTERED, i)) + continue; + + v4l2_event_queue(&node->video_dev, arg); + } + break; + default: + break; + } +} + +/* cfe capture driver file operations */ +static const struct v4l2_file_operations cfe_fops = { + .owner = THIS_MODULE, + .open = v4l2_fh_open, + .release = vb2_fop_release, + .poll = vb2_fop_poll, + .unlocked_ioctl = video_ioctl2, + .mmap = vb2_fop_mmap, +}; + +static int cfe_video_link_validate(struct media_link *link) +{ + struct video_device *vd = container_of(link->sink->entity, + struct video_device, entity); + struct cfe_node *node = container_of(vd, struct cfe_node, video_dev); + struct cfe_device *cfe = node->cfe; + struct v4l2_mbus_framefmt *source_fmt; + struct v4l2_subdev_state *state; + struct v4l2_subdev *source_sd; + int ret = 0; + + cfe_dbg(cfe, "%s: [%s] link \"%s\":%u -> \"%s\":%u\n", __func__, + node_desc[node->id].name, + link->source->entity->name, link->source->index, + link->sink->entity->name, link->sink->index); + + if (!media_entity_remote_source_pad_unique(link->sink->entity)) { + cfe_err(cfe, "video node %s pad not connected\n", vd->name); + return -ENOTCONN; + } + + source_sd = media_entity_to_v4l2_subdev(link->source->entity); + + state = v4l2_subdev_lock_and_get_active_state(source_sd); + + source_fmt = v4l2_subdev_state_get_format(state, link->source->index); + if (!source_fmt) { + ret = -EINVAL; + goto out; + } + + if (is_image_output_node(node)) { + struct v4l2_pix_format *pix_fmt = &node->vid_fmt.fmt.pix; + const struct cfe_fmt *fmt; + + if (source_fmt->width != pix_fmt->width || + source_fmt->height != pix_fmt->height) { + cfe_err(cfe, "Wrong width or height %ux%u (remote pad set to %ux%u)\n", + pix_fmt->width, pix_fmt->height, + source_fmt->width, source_fmt->height); + ret = -EINVAL; + goto out; + } + + fmt = find_format_by_code_and_fourcc(source_fmt->code, + pix_fmt->pixelformat); + if (!fmt) { + cfe_err(cfe, "Format mismatch!\n"); + ret = -EINVAL; + goto out; + } + } else if (is_csi2_node(node) && is_meta_output_node(node)) { + struct v4l2_meta_format *meta_fmt = &node->meta_fmt.fmt.meta; + const struct cfe_fmt *fmt; + + if (source_fmt->width != meta_fmt->width || + source_fmt->height != meta_fmt->height) { + cfe_err(cfe, "Wrong width or height %ux%u (remote pad set to %ux%u)\n", + meta_fmt->width, meta_fmt->height, + source_fmt->width, source_fmt->height); + ret = -EINVAL; + goto out; + } + + fmt = find_format_by_code_and_fourcc(source_fmt->code, + meta_fmt->dataformat); + if (!fmt) { + cfe_err(cfe, "Format mismatch!\n"); + ret = -EINVAL; + goto out; + } + } + +out: + v4l2_subdev_unlock_state(state); + + return ret; +} + +static const struct media_entity_operations cfe_media_entity_ops = { + .link_validate = cfe_video_link_validate, +}; + +static int cfe_video_link_notify(struct media_link *link, u32 flags, + unsigned int notification) +{ + struct media_device *mdev = link->graph_obj.mdev; + struct cfe_device *cfe = container_of(mdev, struct cfe_device, mdev); + struct media_entity *fe = &cfe->fe.sd.entity; + struct media_entity *csi2 = &cfe->csi2.sd.entity; + unsigned long lock_flags; + + if (notification != MEDIA_DEV_NOTIFY_POST_LINK_CH) + return 0; + + cfe_dbg(cfe, "%s: %s[%u] -> %s[%u] 0x%x", __func__, + link->source->entity->name, link->source->index, + link->sink->entity->name, link->sink->index, flags); + + spin_lock_irqsave(&cfe->state_lock, lock_flags); + + for (unsigned int i = 0; i < NUM_NODES; i++) { + if (link->sink->entity != &cfe->node[i].video_dev.entity && + link->source->entity != &cfe->node[i].video_dev.entity) + continue; + + if (link->flags & MEDIA_LNK_FL_ENABLED) + set_state(cfe, NODE_ENABLED, i); + else + clear_state(cfe, NODE_ENABLED, i); + + break; + } + + spin_unlock_irqrestore(&cfe->state_lock, lock_flags); + + if (link->source->entity != csi2) + return 0; + if (link->sink->entity != fe) + return 0; + if (link->sink->index != 0) + return 0; + + cfe->fe_csi2_channel = -1; + if (link->flags & MEDIA_LNK_FL_ENABLED) { + if (link->source->index == node_desc[CSI2_CH0].link_pad) + cfe->fe_csi2_channel = CSI2_CH0; + else if (link->source->index == node_desc[CSI2_CH1].link_pad) + cfe->fe_csi2_channel = CSI2_CH1; + else if (link->source->index == node_desc[CSI2_CH2].link_pad) + cfe->fe_csi2_channel = CSI2_CH2; + else if (link->source->index == node_desc[CSI2_CH3].link_pad) + cfe->fe_csi2_channel = CSI2_CH3; + } + + if (is_fe_enabled(cfe)) + cfe_dbg(cfe, "%s: Found CSI2:%d -> FE:0 link\n", __func__, + cfe->fe_csi2_channel); + else + cfe_dbg(cfe, "%s: Unable to find CSI2:x -> FE:0 link\n", + __func__); + + return 0; +} + +static const struct media_device_ops cfe_media_device_ops = { + .link_notify = cfe_video_link_notify, +}; + +static void cfe_release(struct kref *kref) +{ + struct cfe_device *cfe = container_of(kref, struct cfe_device, kref); + + media_device_cleanup(&cfe->mdev); + + kfree(cfe); +} + +static void cfe_put(struct cfe_device *cfe) +{ + kref_put(&cfe->kref, cfe_release); +} + +static void cfe_get(struct cfe_device *cfe) +{ + kref_get(&cfe->kref); +} + +static void cfe_node_release(struct video_device *vdev) +{ + struct cfe_node *node = video_get_drvdata(vdev); + + cfe_put(node->cfe); +} + +static int cfe_register_node(struct cfe_device *cfe, int id) +{ + struct video_device *vdev; + const struct cfe_fmt *fmt; + struct vb2_queue *q; + struct cfe_node *node = &cfe->node[id]; + int ret; + + node->cfe = cfe; + node->id = id; + + if (node_supports_image(node)) { + if (node_supports_image_output(node)) + node->vid_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + else + node->vid_fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; + + fmt = find_format_by_code(cfe_default_format.code); + if (!fmt) { + cfe_err(cfe, "Failed to find format code\n"); + return -EINVAL; + } + + node->vid_fmt.fmt.pix.pixelformat = fmt->fourcc; + v4l2_fill_pix_format(&node->vid_fmt.fmt.pix, + &cfe_default_format); + + ret = cfe_validate_fmt_vid_cap(node, &node->vid_fmt); + if (ret) + return ret; + } + + if (node_supports_meta(node)) { + if (node_supports_meta_output(node)) + node->meta_fmt.type = V4L2_BUF_TYPE_META_CAPTURE; + else + node->meta_fmt.type = V4L2_BUF_TYPE_META_OUTPUT; + + ret = cfe_validate_fmt_meta(node, &node->meta_fmt); + if (ret) + return ret; + } + + mutex_init(&node->lock); + + q = &node->buffer_queue; + q->type = node_supports_image(node) ? node->vid_fmt.type : + node->meta_fmt.type; + q->io_modes = VB2_MMAP | VB2_DMABUF; + q->drv_priv = node; + q->ops = &cfe_video_qops; + q->mem_ops = &vb2_dma_contig_memops; + q->buf_struct_size = id == FE_CONFIG ? sizeof(struct cfe_config_buffer) + : sizeof(struct cfe_buffer); + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->lock = &node->lock; + q->min_queued_buffers = 1; + q->dev = &cfe->pdev->dev; + + ret = vb2_queue_init(q); + if (ret) { + cfe_err(cfe, "vb2_queue_init() failed\n"); + return ret; + } + + INIT_LIST_HEAD(&node->dma_queue); + + vdev = &node->video_dev; + vdev->release = cfe_node_release; + vdev->fops = &cfe_fops; + vdev->ioctl_ops = &cfe_ioctl_ops; + vdev->entity.ops = &cfe_media_entity_ops; + vdev->v4l2_dev = &cfe->v4l2_dev; + vdev->vfl_dir = (node_supports_image_output(node) || + node_supports_meta_output(node)) ? + VFL_DIR_RX : + VFL_DIR_TX; + vdev->queue = q; + vdev->lock = &node->lock; + vdev->device_caps = node_desc[id].caps; + vdev->device_caps |= V4L2_CAP_STREAMING | V4L2_CAP_IO_MC; + + /* Define the device names */ + snprintf(vdev->name, sizeof(vdev->name), "%s-%s", CFE_MODULE_NAME, + node_desc[id].name); + + video_set_drvdata(vdev, node); + node->pad.flags = node_desc[id].pad_flags; + media_entity_pads_init(&vdev->entity, 1, &node->pad); + + if (!node_supports_image(node)) { + v4l2_disable_ioctl(&node->video_dev, + VIDIOC_ENUM_FRAMEINTERVALS); + v4l2_disable_ioctl(&node->video_dev, VIDIOC_ENUM_FRAMESIZES); + } + + ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1); + if (ret) { + cfe_err(cfe, "Unable to register video device %s\n", + vdev->name); + return ret; + } + + cfe_info(cfe, "Registered [%s] node id %d as /dev/video%u\n", + vdev->name, id, vdev->num); + + /* + * Acquire a reference to cfe, which will be released when the video + * device will be unregistered and userspace will have closed all open + * file handles. + */ + cfe_get(cfe); + set_state(cfe, NODE_REGISTERED, id); + + return 0; +} + +static void cfe_unregister_nodes(struct cfe_device *cfe) +{ + for (unsigned int i = 0; i < NUM_NODES; i++) { + struct cfe_node *node = &cfe->node[i]; + + if (check_state(cfe, NODE_REGISTERED, i)) { + clear_state(cfe, NODE_REGISTERED, i); + video_unregister_device(&node->video_dev); + } + } +} + +static int cfe_link_node_pads(struct cfe_device *cfe) +{ + struct media_pad *remote_pad; + int ret; + + /* Source -> CSI2 */ + + ret = v4l2_create_fwnode_links_to_pad(cfe->source_sd, + &cfe->csi2.pad[CSI2_PAD_SINK], + MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED); + + if (ret) { + cfe_err(cfe, "Failed to create links to the source: %d\n", ret); + return ret; + } + + remote_pad = media_pad_remote_pad_unique(&cfe->csi2.pad[CSI2_PAD_SINK]); + if (IS_ERR(remote_pad)) { + ret = PTR_ERR(remote_pad); + cfe_err(cfe, "Failed to get unique remote source pad: %d\n", + ret); + return ret; + } + + cfe->source_pad = remote_pad->index; + + for (unsigned int i = 0; i < CSI2_NUM_CHANNELS; i++) { + struct cfe_node *node = &cfe->node[i]; + + if (!check_state(cfe, NODE_REGISTERED, i)) + continue; + + /* CSI2 channel # -> /dev/video# */ + ret = media_create_pad_link(&cfe->csi2.sd.entity, + node_desc[i].link_pad, + &node->video_dev.entity, 0, 0); + if (ret) + return ret; + + if (node_supports_image(node)) { + /* CSI2 channel # -> FE Input */ + ret = media_create_pad_link(&cfe->csi2.sd.entity, + node_desc[i].link_pad, + &cfe->fe.sd.entity, + FE_STREAM_PAD, 0); + if (ret) + return ret; + } + } + + for (unsigned int i = CSI2_NUM_CHANNELS; i < NUM_NODES; i++) { + struct cfe_node *node = &cfe->node[i]; + struct media_entity *src, *dst; + unsigned int src_pad, dst_pad; + + if (node_desc[i].pad_flags & MEDIA_PAD_FL_SINK) { + /* FE -> /dev/video# */ + src = &cfe->fe.sd.entity; + src_pad = node_desc[i].link_pad; + dst = &node->video_dev.entity; + dst_pad = 0; + } else { + /* /dev/video# -> FE */ + dst = &cfe->fe.sd.entity; + dst_pad = node_desc[i].link_pad; + src = &node->video_dev.entity; + src_pad = 0; + } + + ret = media_create_pad_link(src, src_pad, dst, dst_pad, 0); + if (ret) + return ret; + } + + return 0; +} + +static int cfe_probe_complete(struct cfe_device *cfe) +{ + int ret; + + cfe->v4l2_dev.notify = cfe_notify; + + for (unsigned int i = 0; i < NUM_NODES; i++) { + ret = cfe_register_node(cfe, i); + if (ret) { + cfe_err(cfe, "Unable to register video node %u.\n", i); + goto unregister; + } + } + + ret = cfe_link_node_pads(cfe); + if (ret) { + cfe_err(cfe, "Unable to link node pads.\n"); + goto unregister; + } + + ret = v4l2_device_register_subdev_nodes(&cfe->v4l2_dev); + if (ret) { + cfe_err(cfe, "Unable to register subdev nodes.\n"); + goto unregister; + } + + return 0; + +unregister: + cfe_unregister_nodes(cfe); + return ret; +} + +static int cfe_async_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_connection *asd) +{ + struct cfe_device *cfe = to_cfe_device(notifier->v4l2_dev); + + if (cfe->source_sd) { + cfe_err(cfe, "Rejecting subdev %s (Already set!!)", + subdev->name); + return 0; + } + + cfe->source_sd = subdev; + + cfe_dbg(cfe, "Using source %s for capture\n", subdev->name); + + return 0; +} + +static int cfe_async_complete(struct v4l2_async_notifier *notifier) +{ + struct cfe_device *cfe = to_cfe_device(notifier->v4l2_dev); + + return cfe_probe_complete(cfe); +} + +static const struct v4l2_async_notifier_operations cfe_async_ops = { + .bound = cfe_async_bound, + .complete = cfe_async_complete, +}; + +static int cfe_register_async_nf(struct cfe_device *cfe) +{ + struct platform_device *pdev = cfe->pdev; + struct v4l2_fwnode_endpoint ep = { .bus_type = V4L2_MBUS_CSI2_DPHY }; + struct fwnode_handle *local_ep_fwnode; + struct v4l2_async_connection *asd; + int ret; + + local_ep_fwnode = fwnode_graph_get_endpoint_by_id(pdev->dev.fwnode, 0, + 0, 0); + if (!local_ep_fwnode) { + cfe_err(cfe, "Failed to find local endpoint fwnode\n"); + return -ENODEV; + } + + /* Parse the local endpoint and validate its configuration. */ + ret = v4l2_fwnode_endpoint_parse(local_ep_fwnode, &ep); + if (ret) { + cfe_err(cfe, "Failed to find remote endpoint fwnode\n"); + goto err_put_local_fwnode; + } + + for (unsigned int lane = 0; lane < ep.bus.mipi_csi2.num_data_lanes; + lane++) { + if (ep.bus.mipi_csi2.data_lanes[lane] != lane + 1) { + cfe_err(cfe, "Data lanes reordering not supported\n"); + ret = -EINVAL; + goto err_put_local_fwnode; + } + } + + cfe->csi2.dphy.max_lanes = ep.bus.mipi_csi2.num_data_lanes; + cfe->csi2.bus_flags = ep.bus.mipi_csi2.flags; + + /* Initialize and register the async notifier. */ + v4l2_async_nf_init(&cfe->notifier, &cfe->v4l2_dev); + cfe->notifier.ops = &cfe_async_ops; + + asd = v4l2_async_nf_add_fwnode_remote(&cfe->notifier, local_ep_fwnode, + struct v4l2_async_connection); + if (IS_ERR(asd)) { + ret = PTR_ERR(asd); + cfe_err(cfe, "Error adding subdevice: %d\n", ret); + goto err_put_local_fwnode; + } + + ret = v4l2_async_nf_register(&cfe->notifier); + if (ret) { + cfe_err(cfe, "Error registering async notifier: %d\n", ret); + goto err_nf_cleanup; + } + + fwnode_handle_put(local_ep_fwnode); + + return 0; + +err_nf_cleanup: + v4l2_async_nf_cleanup(&cfe->notifier); +err_put_local_fwnode: + fwnode_handle_put(local_ep_fwnode); + + return ret; +} + +static int cfe_probe(struct platform_device *pdev) +{ + struct cfe_device *cfe; + char debugfs_name[32]; + int ret; + + cfe = kzalloc(sizeof(*cfe), GFP_KERNEL); + if (!cfe) + return -ENOMEM; + + platform_set_drvdata(pdev, cfe); + + kref_init(&cfe->kref); + cfe->pdev = pdev; + cfe->fe_csi2_channel = -1; + spin_lock_init(&cfe->state_lock); + + cfe->csi2.base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(cfe->csi2.base)) { + dev_err(&pdev->dev, "Failed to get dma io block\n"); + ret = PTR_ERR(cfe->csi2.base); + goto err_cfe_put; + } + + cfe->csi2.dphy.base = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(cfe->csi2.dphy.base)) { + dev_err(&pdev->dev, "Failed to get host io block\n"); + ret = PTR_ERR(cfe->csi2.dphy.base); + goto err_cfe_put; + } + + cfe->mipi_cfg_base = devm_platform_ioremap_resource(pdev, 2); + if (IS_ERR(cfe->mipi_cfg_base)) { + dev_err(&pdev->dev, "Failed to get mipi cfg io block\n"); + ret = PTR_ERR(cfe->mipi_cfg_base); + goto err_cfe_put; + } + + cfe->fe.base = devm_platform_ioremap_resource(pdev, 3); + if (IS_ERR(cfe->fe.base)) { + dev_err(&pdev->dev, "Failed to get pisp fe io block\n"); + ret = PTR_ERR(cfe->fe.base); + goto err_cfe_put; + } + + ret = platform_get_irq(pdev, 0); + if (ret <= 0) { + ret = -EINVAL; + goto err_cfe_put; + } + + ret = devm_request_irq(&pdev->dev, ret, cfe_isr, 0, "rp1-cfe", cfe); + if (ret) { + dev_err(&pdev->dev, "Unable to request interrupt\n"); + ret = -EINVAL; + goto err_cfe_put; + } + + ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); + if (ret) { + dev_err(&pdev->dev, "DMA enable failed\n"); + goto err_cfe_put; + } + + ret = vb2_dma_contig_set_max_seg_size(&pdev->dev, UINT_MAX); + if (ret) + goto err_cfe_put; + + /* TODO: Enable clock only when running. */ + cfe->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(cfe->clk)) { + ret = dev_err_probe(&pdev->dev, PTR_ERR(cfe->clk), + "clock not found\n"); + goto err_cfe_put; + } + + cfe->mdev.dev = &pdev->dev; + cfe->mdev.ops = &cfe_media_device_ops; + strscpy(cfe->mdev.model, CFE_MODULE_NAME, sizeof(cfe->mdev.model)); + strscpy(cfe->mdev.serial, "", sizeof(cfe->mdev.serial)); + snprintf(cfe->mdev.bus_info, sizeof(cfe->mdev.bus_info), "platform:%s", + dev_name(&pdev->dev)); + + media_device_init(&cfe->mdev); + + cfe->v4l2_dev.mdev = &cfe->mdev; + + ret = v4l2_device_register(&pdev->dev, &cfe->v4l2_dev); + if (ret) { + cfe_err(cfe, "Unable to register v4l2 device.\n"); + goto err_cfe_put; + } + + snprintf(debugfs_name, sizeof(debugfs_name), "rp1-cfe:%s", + dev_name(&pdev->dev)); + cfe->debugfs = debugfs_create_dir(debugfs_name, NULL); + debugfs_create_file("regs", 0440, cfe->debugfs, cfe, + &mipi_cfg_regs_fops); + + /* Enable the block power domain */ + pm_runtime_enable(&pdev->dev); + + ret = pm_runtime_resume_and_get(&cfe->pdev->dev); + if (ret) + goto err_runtime_disable; + + cfe->csi2.v4l2_dev = &cfe->v4l2_dev; + ret = csi2_init(&cfe->csi2, cfe->debugfs); + if (ret) { + cfe_err(cfe, "Failed to init csi2 (%d)\n", ret); + goto err_runtime_put; + } + + cfe->fe.v4l2_dev = &cfe->v4l2_dev; + ret = pisp_fe_init(&cfe->fe, cfe->debugfs); + if (ret) { + cfe_err(cfe, "Failed to init pisp fe (%d)\n", ret); + goto err_csi2_uninit; + } + + cfe->mdev.hw_revision = cfe->fe.hw_revision; + ret = media_device_register(&cfe->mdev); + if (ret < 0) { + cfe_err(cfe, "Unable to register media-controller device.\n"); + goto err_pisp_fe_uninit; + } + + ret = cfe_register_async_nf(cfe); + if (ret) { + cfe_err(cfe, "Failed to connect subdevs\n"); + goto err_media_unregister; + } + + pm_runtime_put(&cfe->pdev->dev); + + return 0; + +err_media_unregister: + media_device_unregister(&cfe->mdev); +err_pisp_fe_uninit: + pisp_fe_uninit(&cfe->fe); +err_csi2_uninit: + csi2_uninit(&cfe->csi2); +err_runtime_put: + pm_runtime_put(&cfe->pdev->dev); +err_runtime_disable: + pm_runtime_disable(&pdev->dev); + debugfs_remove(cfe->debugfs); + v4l2_device_unregister(&cfe->v4l2_dev); +err_cfe_put: + cfe_put(cfe); + + return ret; +} + +static void cfe_remove(struct platform_device *pdev) +{ + struct cfe_device *cfe = platform_get_drvdata(pdev); + + debugfs_remove(cfe->debugfs); + + v4l2_async_nf_unregister(&cfe->notifier); + v4l2_async_nf_cleanup(&cfe->notifier); + + media_device_unregister(&cfe->mdev); + cfe_unregister_nodes(cfe); + + pisp_fe_uninit(&cfe->fe); + csi2_uninit(&cfe->csi2); + + pm_runtime_disable(&pdev->dev); + + v4l2_device_unregister(&cfe->v4l2_dev); + + cfe_put(cfe); +} + +static int cfe_runtime_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct cfe_device *cfe = platform_get_drvdata(pdev); + + clk_disable_unprepare(cfe->clk); + + return 0; +} + +static int cfe_runtime_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct cfe_device *cfe = platform_get_drvdata(pdev); + int ret; + + ret = clk_prepare_enable(cfe->clk); + if (ret) { + dev_err(dev, "Unable to enable clock\n"); + return ret; + } + + return 0; +} + +static const struct dev_pm_ops cfe_pm_ops = { + SET_RUNTIME_PM_OPS(cfe_runtime_suspend, cfe_runtime_resume, NULL) + SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) +}; + +static const struct of_device_id cfe_of_match[] = { + { .compatible = "raspberrypi,rp1-cfe" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, cfe_of_match); + +static struct platform_driver cfe_driver = { + .probe = cfe_probe, + .remove = cfe_remove, + .driver = { + .name = CFE_MODULE_NAME, + .of_match_table = cfe_of_match, + .pm = &cfe_pm_ops, + }, +}; + +module_platform_driver(cfe_driver); + +MODULE_AUTHOR("Naushir Patuck <naush@raspberrypi.com>"); +MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>"); +MODULE_DESCRIPTION("Raspberry Pi RP1 Camera Front End driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(CFE_VERSION); |