--- /dev/null
+/*
+ * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
+ *
+ * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
+ * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com>
+ *
+ * Based on drivers/media/platform/s5p-fimc,
+ * Copyright (C) 2010 - 2012 Samsung Electronics Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
+
+#include <linux/bug.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/ratelimit.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/videodev2.h>
+
+#include <media/media-device.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-core.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "camif-core.h"
+#include "camif-regs.h"
+
+static int debug;
+module_param(debug, int, 0644);
+
+/* Locking: called with vp->camif->slock spinlock held */
+static void camif_cfg_video_path(struct camif_vp *vp)
+{
+ WARN_ON(s3c_camif_get_scaler_config(vp, &vp->scaler));
+ camif_hw_set_scaler(vp);
+ camif_hw_set_flip(vp);
+ camif_hw_set_target_format(vp);
+ camif_hw_set_output_dma(vp);
+}
+
+static void camif_prepare_dma_offset(struct camif_vp *vp)
+{
+ struct camif_frame *f = &vp->out_frame;
+
+ f->dma_offset.initial = f->rect.top * f->f_width + f->rect.left;
+ f->dma_offset.line = f->f_width - (f->rect.left + f->rect.width);
+
+ pr_debug("dma_offset: initial: %d, line: %d\n",
+ f->dma_offset.initial, f->dma_offset.line);
+}
+
+/* Locking: called with camif->slock spinlock held */
+static int s3c_camif_hw_init(struct camif_dev *camif, struct camif_vp *vp)
+{
+ const struct s3c_camif_variant *variant = camif->variant;
+
+ if (camif->sensor.sd == NULL || vp->out_fmt == NULL)
+ return -EINVAL;
+
+ if (variant->ip_revision == S3C244X_CAMIF_IP_REV)
+ camif_hw_clear_fifo_overflow(vp);
+ camif_hw_set_camera_bus(camif);
+ camif_hw_set_source_format(camif);
+ camif_hw_set_camera_crop(camif);
+ camif_hw_set_test_pattern(camif, camif->test_pattern);
+ if (variant->has_img_effect)
+ camif_hw_set_effect(camif, camif->colorfx,
+ camif->colorfx_cb, camif->colorfx_cr);
+ if (variant->ip_revision == S3C6410_CAMIF_IP_REV)
+ camif_hw_set_input_path(vp);
+ camif_cfg_video_path(vp);
+ vp->state &= ~ST_VP_CONFIG;
+
+ return 0;
+}
+
+/*
+ * Initialize the video path, only up from the scaler stage. The camera
+ * input interface set up is skipped. This is useful to enable one of the
+ * video paths when the other is already running.
+ * Locking: called with camif->slock spinlock held.
+ */
+static int s3c_camif_hw_vp_init(struct camif_dev *camif, struct camif_vp *vp)
+{
+ unsigned int ip_rev = camif->variant->ip_revision;
+
+ if (vp->out_fmt == NULL)
+ return -EINVAL;
+
+ camif_prepare_dma_offset(vp);
+ if (ip_rev == S3C244X_CAMIF_IP_REV)
+ camif_hw_clear_fifo_overflow(vp);
+ camif_cfg_video_path(vp);
+ vp->state &= ~ST_VP_CONFIG;
+ return 0;
+}
+
+static int sensor_set_power(struct camif_dev *camif, int on)
+{
+ struct cam_sensor *sensor = &camif->sensor;
+ int err = 0;
+
+ if (!on == camif->sensor.power_count)
+ err = v4l2_subdev_call(sensor->sd, core, s_power, on);
+ if (!err)
+ sensor->power_count += on ? 1 : -1;
+
+ pr_debug("on: %d, power_count: %d, err: %d\n",
+ on, sensor->power_count, err);
+
+ return err;
+}
+
+static int sensor_set_streaming(struct camif_dev *camif, int on)
+{
+ struct cam_sensor *sensor = &camif->sensor;
+ int err = 0;
+
+ if (!on == camif->sensor.stream_count)
+ err = v4l2_subdev_call(sensor->sd, video, s_stream, on);
+ if (!err)
+ sensor->stream_count += on ? 1 : -1;
+
+ pr_debug("on: %d, stream_count: %d, err: %d\n",
+ on, sensor->stream_count, err);
+
+ return err;
+}
+
+/*
+ * Reinitialize the driver so it is ready to start streaming again.
+ * Return any buffers to vb2, perform CAMIF software reset and
+ * turn off streaming at the data pipeline (sensor) if required.
+ */
+static int camif_reinitialize(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ struct camif_buffer *buf;
+ unsigned long flags;
+ bool streaming;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ streaming = vp->state & ST_VP_SENSOR_STREAMING;
+
+ vp->state &= ~(ST_VP_PENDING | ST_VP_RUNNING | ST_VP_OFF |
+ ST_VP_ABORTING | ST_VP_STREAMING |
+ ST_VP_SENSOR_STREAMING | ST_VP_LASTIRQ);
+
+ /* Release unused buffers */
+ while (!list_empty(&vp->pending_buf_q)) {
+ buf = camif_pending_queue_pop(vp);
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+ }
+
+ while (!list_empty(&vp->active_buf_q)) {
+ buf = camif_active_queue_pop(vp);
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+ }
+
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ if (!streaming)
+ return 0;
+
+ return sensor_set_streaming(camif, 0);
+}
+
+static bool s3c_vp_active(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ unsigned long flags;
+ bool ret;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ ret = (vp->state & ST_VP_RUNNING) || (vp->state & ST_VP_PENDING);
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ return ret;
+}
+
+static bool camif_is_streaming(struct camif_dev *camif)
+{
+ unsigned long flags;
+ bool status;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ status = camif->stream_count > 0;
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ return status;
+}
+
+static int camif_stop_capture(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ unsigned long flags;
+ int ret;
+
+ if (!s3c_vp_active(vp))
+ return 0;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ vp->state &= ~(ST_VP_OFF | ST_VP_LASTIRQ);
+ vp->state |= ST_VP_ABORTING;
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ ret = wait_event_timeout(vp->irq_queue,
+ !(vp->state & ST_VP_ABORTING),
+ msecs_to_jiffies(CAMIF_STOP_TIMEOUT));
+
+ spin_lock_irqsave(&camif->slock, flags);
+
+ if (ret == 0 && !(vp->state & ST_VP_OFF)) {
+ /* Timed out, forcibly stop capture */
+ vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING |
+ ST_VP_LASTIRQ);
+
+ camif_hw_disable_capture(vp);
+ camif_hw_enable_scaler(vp, false);
+ }
+
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ return camif_reinitialize(vp);
+}
+
+static int camif_prepare_addr(struct camif_vp *vp, struct vb2_buffer *vb,
+ struct camif_addr *paddr)
+{
+ struct camif_frame *frame = &vp->out_frame;
+ u32 pix_size;
+
+ if (vb == NULL || frame == NULL)
+ return -EINVAL;
+
+ pix_size = frame->rect.width * frame->rect.height;
+
+ pr_debug("colplanes: %d, pix_size: %u\n",
+ vp->out_fmt->colplanes, pix_size);
+
+ paddr->y = vb2_dma_contig_plane_dma_addr(vb, 0);
+
+ switch (vp->out_fmt->colplanes) {
+ case 1:
+ paddr->cb = 0;
+ paddr->cr = 0;
+ break;
+ case 2:
+ /* decompose Y into Y/Cb */
+ paddr->cb = (u32)(paddr->y + pix_size);
+ paddr->cr = 0;
+ break;
+ case 3:
+ paddr->cb = (u32)(paddr->y + pix_size);
+ /* decompose Y into Y/Cb/Cr */
+ if (vp->out_fmt->color == IMG_FMT_YCBCR422P)
+ paddr->cr = (u32)(paddr->cb + (pix_size >> 1));
+ else /* 420 */
+ paddr->cr = (u32)(paddr->cb + (pix_size >> 2));
+
+ if (vp->out_fmt->color == IMG_FMT_YCRCB420)
+ swap(paddr->cb, paddr->cr);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ pr_debug("DMA address: y: %pad cb: %pad cr: %pad\n",
+ &paddr->y, &paddr->cb, &paddr->cr);
+
+ return 0;
+}
+
+irqreturn_t s3c_camif_irq_handler(int irq, void *priv)
+{
+ struct camif_vp *vp = priv;
+ struct camif_dev *camif = vp->camif;
+ unsigned int ip_rev = camif->variant->ip_revision;
+ unsigned int status;
+
+ spin_lock(&camif->slock);
+
+ if (ip_rev == S3C6410_CAMIF_IP_REV)
+ camif_hw_clear_pending_irq(vp);
+
+ status = camif_hw_get_status(vp);
+
+ if (ip_rev == S3C244X_CAMIF_IP_REV && (status & CISTATUS_OVF_MASK)) {
+ camif_hw_clear_fifo_overflow(vp);
+ goto unlock;
+ }
+
+ if (vp->state & ST_VP_ABORTING) {
+ if (vp->state & ST_VP_OFF) {
+ /* Last IRQ */
+ vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING |
+ ST_VP_LASTIRQ);
+ wake_up(&vp->irq_queue);
+ goto unlock;
+ } else if (vp->state & ST_VP_LASTIRQ) {
+ camif_hw_disable_capture(vp);
+ camif_hw_enable_scaler(vp, false);
+ camif_hw_set_lastirq(vp, false);
+ vp->state |= ST_VP_OFF;
+ } else {
+ /* Disable capture, enable last IRQ */
+ camif_hw_set_lastirq(vp, true);
+ vp->state |= ST_VP_LASTIRQ;
+ }
+ }
+
+ if (!list_empty(&vp->pending_buf_q) && (vp->state & ST_VP_RUNNING) &&
+ !list_empty(&vp->active_buf_q)) {
+ unsigned int index;
+ struct camif_buffer *vbuf;
+ struct timeval *tv;
+ struct timespec ts;
+ /*
+ * Get previous DMA write buffer index:
+ * 0 => DMA buffer 0, 2;
+ * 1 => DMA buffer 1, 3.
+ */
+ index = (CISTATUS_FRAMECNT(status) + 2) & 1;
+
+ ktime_get_ts(&ts);
+ vbuf = camif_active_queue_peek(vp, index);
+
+ if (!WARN_ON(vbuf == NULL)) {
+ /* Dequeue a filled buffer */
+ tv = &vbuf->vb.v4l2_buf.timestamp;
+ tv->tv_sec = ts.tv_sec;
+ tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
+ vbuf->vb.v4l2_buf.sequence = vp->frame_sequence++;
+ vb2_buffer_done(&vbuf->vb, VB2_BUF_STATE_DONE);
+
+ /* Set up an empty buffer at the DMA engine */
+ vbuf = camif_pending_queue_pop(vp);
+ vbuf->index = index;
+ camif_hw_set_output_addr(vp, &vbuf->paddr, index);
+ camif_hw_set_output_addr(vp, &vbuf->paddr, index + 2);
+
+ /* Scheduled in H/W, add to the queue */
+ camif_active_queue_add(vp, vbuf);
+ }
+ } else if (!(vp->state & ST_VP_ABORTING) &&
+ (vp->state & ST_VP_PENDING)) {
+ vp->state |= ST_VP_RUNNING;
+ }
+
+ if (vp->state & ST_VP_CONFIG) {
+ camif_prepare_dma_offset(vp);
+ camif_hw_set_camera_crop(camif);
+ camif_hw_set_scaler(vp);
+ camif_hw_set_flip(vp);
+ camif_hw_set_test_pattern(camif, camif->test_pattern);
+ if (camif->variant->has_img_effect)
+ camif_hw_set_effect(camif, camif->colorfx,
+ camif->colorfx_cb, camif->colorfx_cr);
+ vp->state &= ~ST_VP_CONFIG;
+ }
+unlock:
+ spin_unlock(&camif->slock);
+ return IRQ_HANDLED;
+}
+
+static int start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct camif_vp *vp = vb2_get_drv_priv(vq);
+ struct camif_dev *camif = vp->camif;
+ unsigned long flags;
+ int ret;
+
+ /*
+ * We assume the codec capture path is always activated
+ * first, before the preview path starts streaming.
+ * This is required to avoid internal FIFO overflow and
+ * a need for CAMIF software reset.
+ */
+ spin_lock_irqsave(&camif->slock, flags);
+
+ if (camif->stream_count == 0) {
+ camif_hw_reset(camif);
+ ret = s3c_camif_hw_init(camif, vp);
+ } else {
+ ret = s3c_camif_hw_vp_init(camif, vp);
+ }
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ if (ret < 0) {
+ camif_reinitialize(vp);
+ return ret;
+ }
+
+ spin_lock_irqsave(&camif->slock, flags);
+ vp->frame_sequence = 0;
+ vp->state |= ST_VP_PENDING;
+
+ if (!list_empty(&vp->pending_buf_q) &&
+ (!(vp->state & ST_VP_STREAMING) ||
+ !(vp->state & ST_VP_SENSOR_STREAMING))) {
+
+ camif_hw_enable_scaler(vp, vp->scaler.enable);
+ camif_hw_enable_capture(vp);
+ vp->state |= ST_VP_STREAMING;
+
+ if (!(vp->state & ST_VP_SENSOR_STREAMING)) {
+ vp->state |= ST_VP_SENSOR_STREAMING;
+ spin_unlock_irqrestore(&camif->slock, flags);
+ ret = sensor_set_streaming(camif, 1);
+ if (ret)
+ v4l2_err(&vp->vdev, "Sensor s_stream failed\n");
+ if (debug)
+ camif_hw_dump_regs(camif, __func__);
+
+ return ret;
+ }
+ }
+
+ spin_unlock_irqrestore(&camif->slock, flags);
+ return 0;
+}
+
+static void stop_streaming(struct vb2_queue *vq)
+{
+ struct camif_vp *vp = vb2_get_drv_priv(vq);
+ camif_stop_capture(vp);
+}
+
+static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
+ unsigned int *num_buffers, unsigned int *num_planes,
+ unsigned int sizes[], void *allocators[])
+{
+ const struct v4l2_pix_format *pix = NULL;
+ struct camif_vp *vp = vb2_get_drv_priv(vq);
+ struct camif_dev *camif = vp->camif;
+ struct camif_frame *frame = &vp->out_frame;
+ const struct camif_fmt *fmt = vp->out_fmt;
+ unsigned int size;
+
+ if (pfmt) {
+ pix = &pfmt->fmt.pix;
+ fmt = s3c_camif_find_format(vp, &pix->pixelformat, -1);
+ size = (pix->width * pix->height * fmt->depth) / 8;
+ } else {
+ size = (frame->f_width * frame->f_height * fmt->depth) / 8;
+ }
+
+ if (fmt == NULL)
+ return -EINVAL;
+ *num_planes = 1;
+
+ if (pix)
+ sizes[0] = max(size, pix->sizeimage);
+ else
+ sizes[0] = size;
+ allocators[0] = camif->alloc_ctx;
+
+ pr_debug("size: %u\n", sizes[0]);
+ return 0;
+}
+
+static int buffer_prepare(struct vb2_buffer *vb)
+{
+ struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue);
+
+ if (vp->out_fmt == NULL)
+ return -EINVAL;
+
+ if (vb2_plane_size(vb, 0) < vp->payload) {
+ v4l2_err(&vp->vdev, "buffer too small: %lu, required: %u\n",
+ vb2_plane_size(vb, 0), vp->payload);
+ return -EINVAL;
+ }
+ vb2_set_plane_payload(vb, 0, vp->payload);
+
+ return 0;
+}
+
+static void buffer_queue(struct vb2_buffer *vb)
+{
+ struct camif_buffer *buf = container_of(vb, struct camif_buffer, vb);
+ struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue);
+ struct camif_dev *camif = vp->camif;
+ unsigned long flags;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ WARN_ON(camif_prepare_addr(vp, &buf->vb, &buf->paddr));
+
+ if (!(vp->state & ST_VP_STREAMING) && vp->active_buffers < 2) {
+ /* Schedule an empty buffer in H/W */
+ buf->index = vp->buf_index;
+
+ camif_hw_set_output_addr(vp, &buf->paddr, buf->index);
+ camif_hw_set_output_addr(vp, &buf->paddr, buf->index + 2);
+
+ camif_active_queue_add(vp, buf);
+ vp->buf_index = !vp->buf_index;
+ } else {
+ camif_pending_queue_add(vp, buf);
+ }
+
+ if (vb2_is_streaming(&vp->vb_queue) && !list_empty(&vp->pending_buf_q)
+ && !(vp->state & ST_VP_STREAMING)) {
+
+ vp->state |= ST_VP_STREAMING;
+ camif_hw_enable_scaler(vp, vp->scaler.enable);
+ camif_hw_enable_capture(vp);
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ if (!(vp->state & ST_VP_SENSOR_STREAMING)) {
+ if (sensor_set_streaming(camif, 1) == 0)
+ vp->state |= ST_VP_SENSOR_STREAMING;
+ else
+ v4l2_err(&vp->vdev, "Sensor s_stream failed\n");
+
+ if (debug)
+ camif_hw_dump_regs(camif, __func__);
+ }
+ return;
+ }
+ spin_unlock_irqrestore(&camif->slock, flags);
+}
+
+static const struct vb2_ops s3c_camif_qops = {
+ .queue_setup = queue_setup,
+ .buf_prepare = buffer_prepare,
+ .buf_queue = buffer_queue,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .start_streaming = start_streaming,
+ .stop_streaming = stop_streaming,
+};
+
+static int s3c_camif_open(struct file *file)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ int ret;
+
+ pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
+ vp->state, vp->owner, task_pid_nr(current));
+
+ if (mutex_lock_interruptible(&camif->lock))
+ return -ERESTARTSYS;
+
+ ret = v4l2_fh_open(file);
+ if (ret < 0)
+ goto unlock;
+
+ ret = pm_runtime_get_sync(camif->dev);
+ if (ret < 0)
+ goto err_pm;
+
+ ret = sensor_set_power(camif, 1);
+ if (!ret)
+ goto unlock;
+
+ pm_runtime_put(camif->dev);
+err_pm:
+ v4l2_fh_release(file);
+unlock:
+ mutex_unlock(&camif->lock);
+ return ret;
+}
+
+static int s3c_camif_close(struct file *file)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ int ret;
+
+ pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
+ vp->state, vp->owner, task_pid_nr(current));
+
+ mutex_lock(&camif->lock);
+
+ if (vp->owner == file->private_data) {
+ camif_stop_capture(vp);
+ vb2_queue_release(&vp->vb_queue);
+ vp->owner = NULL;
+ }
+
+ sensor_set_power(camif, 0);
+
+ pm_runtime_put(camif->dev);
+ ret = v4l2_fh_release(file);
+
+ mutex_unlock(&camif->lock);
+ return ret;
+}
+
+static unsigned int s3c_camif_poll(struct file *file,
+ struct poll_table_struct *wait)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ int ret;
+
+ mutex_lock(&camif->lock);
+ if (vp->owner && vp->owner != file->private_data)
+ ret = -EBUSY;
+ else
+ ret = vb2_poll(&vp->vb_queue, file, wait);
+
+ mutex_unlock(&camif->lock);
+ return ret;
+}
+
+static int s3c_camif_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ int ret;
+
+ if (vp->owner && vp->owner != file->private_data)
+ ret = -EBUSY;
+ else
+ ret = vb2_mmap(&vp->vb_queue, vma);
+
+ return ret;
+}
+
+static const struct v4l2_file_operations s3c_camif_fops = {
+ .owner = THIS_MODULE,
+ .open = s3c_camif_open,
+ .release = s3c_camif_close,
+ .poll = s3c_camif_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = s3c_camif_mmap,
+};
+
+/*
+ * Video node IOCTLs
+ */
+
+static int s3c_camif_vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct camif_vp *vp = video_drvdata(file);
+
+ strlcpy(cap->driver, S3C_CAMIF_DRIVER_NAME, sizeof(cap->driver));
+ strlcpy(cap->card, S3C_CAMIF_DRIVER_NAME, sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s.%d",
+ dev_name(vp->camif->dev), vp->id);
+
+ cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+ return 0;
+}
+
+static int s3c_camif_vidioc_enum_input(struct file *file, void *priv,
+ struct v4l2_input *input)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct v4l2_subdev *sensor = vp->camif->sensor.sd;
+
+ if (input->index || sensor == NULL)
+ return -EINVAL;
+
+ input->type = V4L2_INPUT_TYPE_CAMERA;
+ strlcpy(input->name, sensor->name, sizeof(input->name));
+ return 0;
+}
+
+static int s3c_camif_vidioc_s_input(struct file *file, void *priv,
+ unsigned int i)
+{
+ return i == 0 ? 0 : -EINVAL;
+}
+
+static int s3c_camif_vidioc_g_input(struct file *file, void *priv,
+ unsigned int *i)
+{
+ *i = 0;
+ return 0;
+}
+
+static int s3c_camif_vidioc_enum_fmt(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ const struct camif_fmt *fmt;
+
+ fmt = s3c_camif_find_format(vp, NULL, f->index);
+ if (!fmt)
+ return -EINVAL;
+
+ strlcpy(f->description, fmt->name, sizeof(f->description));
+ f->pixelformat = fmt->fourcc;
+
+ pr_debug("fmt(%d): %s\n", f->index, f->description);
+ return 0;
+}
+
+static int s3c_camif_vidioc_g_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct camif_frame *frame = &vp->out_frame;
+ const struct camif_fmt *fmt = vp->out_fmt;
+
+ pix->bytesperline = frame->f_width * fmt->ybpp;
+ pix->sizeimage = vp->payload;
+
+ pix->pixelformat = fmt->fourcc;
+ pix->width = frame->f_width;
+ pix->height = frame->f_height;
+ pix->field = V4L2_FIELD_NONE;
+ pix->colorspace = V4L2_COLORSPACE_JPEG;
+
+ return 0;
+}
+
+static int __camif_video_try_format(struct camif_vp *vp,
+ struct v4l2_pix_format *pix,
+ const struct camif_fmt **ffmt)
+{
+ struct camif_dev *camif = vp->camif;
+ struct v4l2_rect *crop = &camif->camif_crop;
+ unsigned int wmin, hmin, sc_hrmax, sc_vrmax;
+ const struct vp_pix_limits *pix_lim;
+ const struct camif_fmt *fmt;
+
+ fmt = s3c_camif_find_format(vp, &pix->pixelformat, 0);
+
+ if (WARN_ON(fmt == NULL))
+ return -EINVAL;
+
+ if (ffmt)
+ *ffmt = fmt;
+
+ pix_lim = &camif->variant->vp_pix_limits[vp->id];
+
+ pr_debug("fmt: %ux%u, crop: %ux%u, bytesperline: %u\n",
+ pix->width, pix->height, crop->width, crop->height,
+ pix->bytesperline);
+ /*
+ * Calculate minimum width and height according to the configured
+ * camera input interface crop rectangle and the resizer's capabilities.
+ */
+ sc_hrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->width) - 3));
+ sc_vrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->height) - 1));
+
+ wmin = max_t(u32, pix_lim->min_out_width, crop->width / sc_hrmax);
+ wmin = round_up(wmin, pix_lim->out_width_align);
+ hmin = max_t(u32, 8, crop->height / sc_vrmax);
+ hmin = round_up(hmin, 8);
+
+ v4l_bound_align_image(&pix->width, wmin, pix_lim->max_sc_out_width,
+ ffs(pix_lim->out_width_align) - 1,
+ &pix->height, hmin, pix_lim->max_height, 0, 0);
+
+ pix->bytesperline = pix->width * fmt->ybpp;
+ pix->sizeimage = (pix->width * pix->height * fmt->depth) / 8;
+ pix->pixelformat = fmt->fourcc;
+ pix->colorspace = V4L2_COLORSPACE_JPEG;
+ pix->field = V4L2_FIELD_NONE;
+
+ pr_debug("%ux%u, wmin: %d, hmin: %d, sc_hrmax: %d, sc_vrmax: %d\n",
+ pix->width, pix->height, wmin, hmin, sc_hrmax, sc_vrmax);
+
+ return 0;
+}
+
+static int s3c_camif_vidioc_try_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ return __camif_video_try_format(vp, &f->fmt.pix, NULL);
+}
+
+static int s3c_camif_vidioc_s_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_frame *out_frame = &vp->out_frame;
+ const struct camif_fmt *fmt = NULL;
+ int ret;
+
+ pr_debug("[vp%d]\n", vp->id);
+
+ if (vb2_is_busy(&vp->vb_queue))
+ return -EBUSY;
+
+ ret = __camif_video_try_format(vp, &f->fmt.pix, &fmt);
+ if (ret < 0)
+ return ret;
+
+ vp->out_fmt = fmt;
+ vp->payload = pix->sizeimage;
+ out_frame->f_width = pix->width;
+ out_frame->f_height = pix->height;
+
+ /* Reset composition rectangle */
+ out_frame->rect.width = pix->width;
+ out_frame->rect.height = pix->height;
+ out_frame->rect.left = 0;
+ out_frame->rect.top = 0;
+
+ if (vp->owner == NULL)
+ vp->owner = priv;
+
+ pr_debug("%ux%u. payload: %u. fmt: %s. %d %d. sizeimage: %d. bpl: %d\n",
+ out_frame->f_width, out_frame->f_height, vp->payload, fmt->name,
+ pix->width * pix->height * fmt->depth, fmt->depth,
+ pix->sizeimage, pix->bytesperline);
+
+ return 0;
+}
+
+/* Only check pixel formats at the sensor and the camif subdev pads */
+static int camif_pipeline_validate(struct camif_dev *camif)
+{
+ struct v4l2_subdev_format src_fmt;
+ struct media_pad *pad;
+ int ret;
+
+ /* Retrieve format at the sensor subdev source pad */
+ pad = media_entity_remote_pad(&camif->pads[0]);
+ if (!pad || media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
+ return -EPIPE;
+
+ src_fmt.pad = pad->index;
+ src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ ret = v4l2_subdev_call(camif->sensor.sd, pad, get_fmt, NULL, &src_fmt);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ return -EPIPE;
+
+ if (src_fmt.format.width != camif->mbus_fmt.width ||
+ src_fmt.format.height != camif->mbus_fmt.height ||
+ src_fmt.format.code != camif->mbus_fmt.code)
+ return -EPIPE;
+
+ return 0;
+}
+
+static int s3c_camif_streamon(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ struct media_entity *sensor = &camif->sensor.sd->entity;
+ int ret;
+
+ pr_debug("[vp%d]\n", vp->id);
+
+ if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ if (vp->owner && vp->owner != priv)
+ return -EBUSY;
+
+ if (s3c_vp_active(vp))
+ return 0;
+
+ ret = media_entity_pipeline_start(sensor, camif->m_pipeline);
+ if (ret < 0)
+ return ret;
+
+ ret = camif_pipeline_validate(camif);
+ if (ret < 0) {
+ media_entity_pipeline_stop(sensor);
+ return ret;
+ }
+
+ return vb2_streamon(&vp->vb_queue, type);
+}
+
+static int s3c_camif_streamoff(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ int ret;
+
+ pr_debug("[vp%d]\n", vp->id);
+
+ if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ if (vp->owner && vp->owner != priv)
+ return -EBUSY;
+
+ ret = vb2_streamoff(&vp->vb_queue, type);
+ if (ret == 0)
+ media_entity_pipeline_stop(&camif->sensor.sd->entity);
+ return ret;
+}
+
+static int s3c_camif_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *rb)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ int ret;
+
+ pr_debug("[vp%d] rb count: %d, owner: %p, priv: %p\n",
+ vp->id, rb->count, vp->owner, priv);
+
+ if (vp->owner && vp->owner != priv)
+ return -EBUSY;
+
+ if (rb->count)
+ rb->count = max_t(u32, CAMIF_REQ_BUFS_MIN, rb->count);
+ else
+ vp->owner = NULL;
+
+ ret = vb2_reqbufs(&vp->vb_queue, rb);
+ if (ret < 0)
+ return ret;
+
+ if (rb->count && rb->count < CAMIF_REQ_BUFS_MIN) {
+ rb->count = 0;
+ vb2_reqbufs(&vp->vb_queue, rb);
+ ret = -ENOMEM;
+ }
+
+ vp->reqbufs_count = rb->count;
+ if (vp->owner == NULL && rb->count > 0)
+ vp->owner = priv;
+
+ return ret;
+}
+
+static int s3c_camif_querybuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ return vb2_querybuf(&vp->vb_queue, buf);
+}
+
+static int s3c_camif_qbuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct camif_vp *vp = video_drvdata(file);
+
+ pr_debug("[vp%d]\n", vp->id);
+
+ if (vp->owner && vp->owner != priv)
+ return -EBUSY;
+
+ return vb2_qbuf(&vp->vb_queue, buf);
+}
+
+static int s3c_camif_dqbuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct camif_vp *vp = video_drvdata(file);
+
+ pr_debug("[vp%d] sequence: %d\n", vp->id, vp->frame_sequence);
+
+ if (vp->owner && vp->owner != priv)
+ return -EBUSY;
+
+ return vb2_dqbuf(&vp->vb_queue, buf, file->f_flags & O_NONBLOCK);
+}
+
+static int s3c_camif_create_bufs(struct file *file, void *priv,
+ struct v4l2_create_buffers *create)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ int ret;
+
+ if (vp->owner && vp->owner != priv)
+ return -EBUSY;
+
+ create->count = max_t(u32, 1, create->count);
+ ret = vb2_create_bufs(&vp->vb_queue, create);
+
+ if (!ret && vp->owner == NULL)
+ vp->owner = priv;
+
+ return ret;
+}
+
+static int s3c_camif_prepare_buf(struct file *file, void *priv,
+ struct v4l2_buffer *b)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ return vb2_prepare_buf(&vp->vb_queue, b);
+}
+
+static int s3c_camif_g_selection(struct file *file, void *priv,
+ struct v4l2_selection *sel)
+{
+ struct camif_vp *vp = video_drvdata(file);
+
+ if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ switch (sel->target) {
+ case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+ case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+ sel->r.left = 0;
+ sel->r.top = 0;
+ sel->r.width = vp->out_frame.f_width;
+ sel->r.height = vp->out_frame.f_height;
+ return 0;
+
+ case V4L2_SEL_TGT_COMPOSE:
+ sel->r = vp->out_frame.rect;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static void __camif_try_compose(struct camif_dev *camif, struct camif_vp *vp,
+ struct v4l2_rect *r)
+{
+ /* s3c244x doesn't support composition */
+ if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV) {
+ *r = vp->out_frame.rect;
+ return;
+ }
+
+ /* TODO: s3c64xx */
+}
+
+static int s3c_camif_s_selection(struct file *file, void *priv,
+ struct v4l2_selection *sel)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ struct v4l2_rect rect = sel->r;
+ unsigned long flags;
+
+ if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+ sel->target != V4L2_SEL_TGT_COMPOSE)
+ return -EINVAL;
+
+ __camif_try_compose(camif, vp, &rect);
+
+ sel->r = rect;
+ spin_lock_irqsave(&camif->slock, flags);
+ vp->out_frame.rect = rect;
+ vp->state |= ST_VP_CONFIG;
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ pr_debug("type: %#x, target: %#x, flags: %#x, (%d,%d)/%dx%d\n",
+ sel->type, sel->target, sel->flags,
+ sel->r.left, sel->r.top, sel->r.width, sel->r.height);
+
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops s3c_camif_ioctl_ops = {
+ .vidioc_querycap = s3c_camif_vidioc_querycap,
+ .vidioc_enum_input = s3c_camif_vidioc_enum_input,
+ .vidioc_g_input = s3c_camif_vidioc_g_input,
+ .vidioc_s_input = s3c_camif_vidioc_s_input,
+ .vidioc_enum_fmt_vid_cap = s3c_camif_vidioc_enum_fmt,
+ .vidioc_try_fmt_vid_cap = s3c_camif_vidioc_try_fmt,
+ .vidioc_s_fmt_vid_cap = s3c_camif_vidioc_s_fmt,
+ .vidioc_g_fmt_vid_cap = s3c_camif_vidioc_g_fmt,
+ .vidioc_g_selection = s3c_camif_g_selection,
+ .vidioc_s_selection = s3c_camif_s_selection,
+ .vidioc_reqbufs = s3c_camif_reqbufs,
+ .vidioc_querybuf = s3c_camif_querybuf,
+ .vidioc_prepare_buf = s3c_camif_prepare_buf,
+ .vidioc_create_bufs = s3c_camif_create_bufs,
+ .vidioc_qbuf = s3c_camif_qbuf,
+ .vidioc_dqbuf = s3c_camif_dqbuf,
+ .vidioc_streamon = s3c_camif_streamon,
+ .vidioc_streamoff = s3c_camif_streamoff,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+ .vidioc_log_status = v4l2_ctrl_log_status,
+};
+
+/*
+ * Video node controls
+ */
+static int s3c_camif_video_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct camif_vp *vp = ctrl->priv;
+ struct camif_dev *camif = vp->camif;
+ unsigned long flags;
+
+ pr_debug("[vp%d] ctrl: %s, value: %d\n", vp->id,
+ ctrl->name, ctrl->val);
+
+ spin_lock_irqsave(&camif->slock, flags);
+
+ switch (ctrl->id) {
+ case V4L2_CID_HFLIP:
+ vp->hflip = ctrl->val;
+ break;
+
+ case V4L2_CID_VFLIP:
+ vp->vflip = ctrl->val;
+ break;
+ }
+
+ vp->state |= ST_VP_CONFIG;
+ spin_unlock_irqrestore(&camif->slock, flags);
+ return 0;
+}
+
+/* Codec and preview video node control ops */
+static const struct v4l2_ctrl_ops s3c_camif_video_ctrl_ops = {
+ .s_ctrl = s3c_camif_video_s_ctrl,
+};
+
+int s3c_camif_register_video_node(struct camif_dev *camif, int idx)
+{
+ struct camif_vp *vp = &camif->vp[idx];
+ struct vb2_queue *q = &vp->vb_queue;
+ struct video_device *vfd = &vp->vdev;
+ struct v4l2_ctrl *ctrl;
+ int ret;
+
+ memset(vfd, 0, sizeof(*vfd));
+ snprintf(vfd->name, sizeof(vfd->name), "camif-%s",
+ vp->id == 0 ? "codec" : "preview");
+
+ vfd->fops = &s3c_camif_fops;
+ vfd->ioctl_ops = &s3c_camif_ioctl_ops;
+ vfd->v4l2_dev = &camif->v4l2_dev;
+ vfd->minor = -1;
+ vfd->release = video_device_release_empty;
+ vfd->lock = &camif->lock;
+ vp->reqbufs_count = 0;
+
+ INIT_LIST_HEAD(&vp->pending_buf_q);
+ INIT_LIST_HEAD(&vp->active_buf_q);
+
+ memset(q, 0, sizeof(*q));
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_USERPTR;
+ q->ops = &s3c_camif_qops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ q->buf_struct_size = sizeof(struct camif_buffer);
+ q->drv_priv = vp;
+ q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ q->lock = &vp->camif->lock;
+
+ ret = vb2_queue_init(q);
+ if (ret)
+ goto err_vd_rel;
+
+ vp->pad.flags = MEDIA_PAD_FL_SINK;
+ ret = media_entity_init(&vfd->entity, 1, &vp->pad, 0);
+ if (ret)
+ goto err_vd_rel;
+
+ video_set_drvdata(vfd, vp);
+
+ v4l2_ctrl_handler_init(&vp->ctrl_handler, 1);
+ ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ if (ctrl)
+ ctrl->priv = vp;
+ ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+ if (ctrl)
+ ctrl->priv = vp;
+
+ ret = vp->ctrl_handler.error;
+ if (ret < 0)
+ goto err_me_cleanup;
+
+ vfd->ctrl_handler = &vp->ctrl_handler;
+
+ ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
+ if (ret)
+ goto err_ctrlh_free;
+
+ v4l2_info(&camif->v4l2_dev, "registered %s as /dev/%s\n",
+ vfd->name, video_device_node_name(vfd));
+ return 0;
+
+err_ctrlh_free:
+ v4l2_ctrl_handler_free(&vp->ctrl_handler);
+err_me_cleanup:
+ media_entity_cleanup(&vfd->entity);
+err_vd_rel:
+ video_device_release(vfd);
+ return ret;
+}
+
+void s3c_camif_unregister_video_node(struct camif_dev *camif, int idx)
+{
+ struct video_device *vfd = &camif->vp[idx].vdev;
+
+ if (video_is_registered(vfd)) {
+ video_unregister_device(vfd);
+ media_entity_cleanup(&vfd->entity);
+ v4l2_ctrl_handler_free(vfd->ctrl_handler);
+ }
+}
+
+/* Media bus pixel formats supported at the camif input */
+static const u32 camif_mbus_formats[] = {
+ MEDIA_BUS_FMT_YUYV8_2X8,
+ MEDIA_BUS_FMT_YVYU8_2X8,
+ MEDIA_BUS_FMT_UYVY8_2X8,
+ MEDIA_BUS_FMT_VYUY8_2X8,
+};
+
+/*
+ * Camera input interface subdev operations
+ */
+
+static int s3c_camif_subdev_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index >= ARRAY_SIZE(camif_mbus_formats))
+ return -EINVAL;
+
+ code->code = camif_mbus_formats[code->index];
+ return 0;
+}
+
+static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct camif_dev *camif = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *mf = &fmt->format;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
+ fmt->format = *mf;
+ return 0;
+ }
+
+ mutex_lock(&camif->lock);
+
+ switch (fmt->pad) {
+ case CAMIF_SD_PAD_SINK:
+ /* full camera input pixel size */
+ *mf = camif->mbus_fmt;
+ break;
+
+ case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
+ /* crop rectangle at camera interface input */
+ mf->width = camif->camif_crop.width;
+ mf->height = camif->camif_crop.height;
+ mf->code = camif->mbus_fmt.code;
+ break;
+ }
+
+ mutex_unlock(&camif->lock);
+ mf->field = V4L2_FIELD_NONE;
+ mf->colorspace = V4L2_COLORSPACE_JPEG;
+ return 0;
+}
+
+static void __camif_subdev_try_format(struct camif_dev *camif,
+ struct v4l2_mbus_framefmt *mf, int pad)
+{
+ const struct s3c_camif_variant *variant = camif->variant;
+ const struct vp_pix_limits *pix_lim;
+ int i = ARRAY_SIZE(camif_mbus_formats);
+
+ /* FIXME: constraints against codec or preview path ? */
+ pix_lim = &variant->vp_pix_limits[VP_CODEC];
+
+ while (i-- >= 0)
+ if (camif_mbus_formats[i] == mf->code)
+ break;
+
+ mf->code = camif_mbus_formats[i];
+
+ if (pad == CAMIF_SD_PAD_SINK) {
+ v4l_bound_align_image(&mf->width, 8, CAMIF_MAX_PIX_WIDTH,
+ ffs(pix_lim->out_width_align) - 1,
+ &mf->height, 8, CAMIF_MAX_PIX_HEIGHT, 0,
+ 0);
+ } else {
+ struct v4l2_rect *crop = &camif->camif_crop;
+ v4l_bound_align_image(&mf->width, 8, crop->width,
+ ffs(pix_lim->out_width_align) - 1,
+ &mf->height, 8, crop->height,
+ 0, 0);
+ }
+
+ v4l2_dbg(1, debug, &camif->subdev, "%ux%u\n", mf->width, mf->height);
+}
+
+static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct camif_dev *camif = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *mf = &fmt->format;
+ struct v4l2_rect *crop = &camif->camif_crop;
+ int i;
+
+ v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %ux%u\n",
+ fmt->pad, mf->code, mf->width, mf->height);
+
+ mf->field = V4L2_FIELD_NONE;
+ mf->colorspace = V4L2_COLORSPACE_JPEG;
+ mutex_lock(&camif->lock);
+
+ /*
+ * No pixel format change at the camera input is allowed
+ * while streaming.
+ */
+ if (vb2_is_busy(&camif->vp[VP_CODEC].vb_queue) ||
+ vb2_is_busy(&camif->vp[VP_PREVIEW].vb_queue)) {
+ mutex_unlock(&camif->lock);
+ return -EBUSY;
+ }
+
+ __camif_subdev_try_format(camif, mf, fmt->pad);
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
+ *mf = fmt->format;
+ mutex_unlock(&camif->lock);
+ return 0;
+ }
+
+ switch (fmt->pad) {
+ case CAMIF_SD_PAD_SINK:
+ camif->mbus_fmt = *mf;
+ /* Reset sink crop rectangle. */
+ crop->width = mf->width;
+ crop->height = mf->height;
+ crop->left = 0;
+ crop->top = 0;
+ /*
+ * Reset source format (the camif's crop rectangle)
+ * and the video output resolution.
+ */
+ for (i = 0; i < CAMIF_VP_NUM; i++) {
+ struct camif_frame *frame = &camif->vp[i].out_frame;
+ frame->rect = *crop;
+ frame->f_width = mf->width;
+ frame->f_height = mf->height;
+ }
+ break;
+
+ case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
+ /* Pixel format can be only changed on the sink pad. */
+ mf->code = camif->mbus_fmt.code;
+ mf->width = crop->width;
+ mf->height = crop->height;
+ break;
+ }
+
+ mutex_unlock(&camif->lock);
+ return 0;
+}
+
+static int s3c_camif_subdev_get_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
+{
+ struct camif_dev *camif = v4l2_get_subdevdata(sd);
+ struct v4l2_rect *crop = &camif->camif_crop;
+ struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
+
+ if ((sel->target != V4L2_SEL_TGT_CROP &&
+ sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
+ sel->pad != CAMIF_SD_PAD_SINK)
+ return -EINVAL;
+
+ if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
+ sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
+ return 0;
+ }
+
+ mutex_lock(&camif->lock);
+
+ if (sel->target == V4L2_SEL_TGT_CROP) {
+ sel->r = *crop;
+ } else { /* crop bounds */
+ sel->r.width = mf->width;
+ sel->r.height = mf->height;
+ sel->r.left = 0;
+ sel->r.top = 0;
+ }
+
+ mutex_unlock(&camif->lock);
+
+ v4l2_dbg(1, debug, sd, "%s: crop: (%d,%d) %dx%d, size: %ux%u\n",
+ __func__, crop->left, crop->top, crop->width,
+ crop->height, mf->width, mf->height);
+
+ return 0;
+}
+
+static void __camif_try_crop(struct camif_dev *camif, struct v4l2_rect *r)
+{
+ struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
+ const struct camif_pix_limits *pix_lim = &camif->variant->pix_limits;
+ unsigned int left = 2 * r->left;
+ unsigned int top = 2 * r->top;
+
+ /*
+ * Following constraints must be met:
+ * - r->width + 2 * r->left = mf->width;
+ * - r->height + 2 * r->top = mf->height;
+ * - crop rectangle size and position must be aligned
+ * to 8 or 2 pixels, depending on SoC version.
+ */
+ v4l_bound_align_image(&r->width, 0, mf->width,
+ ffs(pix_lim->win_hor_offset_align) - 1,
+ &r->height, 0, mf->height, 1, 0);
+
+ v4l_bound_align_image(&left, 0, mf->width - r->width,
+ ffs(pix_lim->win_hor_offset_align),
+ &top, 0, mf->height - r->height, 2, 0);
+
+ r->left = left / 2;
+ r->top = top / 2;
+ r->width = mf->width - left;
+ r->height = mf->height - top;
+ /*
+ * Make sure we either downscale or upscale both the pixel
+ * width and height. Just return current crop rectangle if
+ * this scaler constraint is not met.
+ */
+ if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV &&
+ camif_is_streaming(camif)) {
+ unsigned int i;
+
+ for (i = 0; i < CAMIF_VP_NUM; i++) {
+ struct v4l2_rect *or = &camif->vp[i].out_frame.rect;
+ if ((or->width > r->width) == (or->height > r->height))
+ continue;
+ *r = camif->camif_crop;
+ pr_debug("Width/height scaling direction limitation\n");
+ break;
+ }
+ }
+
+ v4l2_dbg(1, debug, &camif->v4l2_dev, "crop: (%d,%d)/%dx%d, fmt: %ux%u\n",
+ r->left, r->top, r->width, r->height, mf->width, mf->height);
+}
+
+static int s3c_camif_subdev_set_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
+{
+ struct camif_dev *camif = v4l2_get_subdevdata(sd);
+ struct v4l2_rect *crop = &camif->camif_crop;
+ struct camif_scaler scaler;
+
+ if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != CAMIF_SD_PAD_SINK)
+ return -EINVAL;
+
+ mutex_lock(&camif->lock);
+ __camif_try_crop(camif, &sel->r);
+
+ if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
+ *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
+ } else {
+ unsigned long flags;
+ unsigned int i;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ *crop = sel->r;
+
+ for (i = 0; i < CAMIF_VP_NUM; i++) {
+ struct camif_vp *vp = &camif->vp[i];
+ scaler = vp->scaler;
+ if (s3c_camif_get_scaler_config(vp, &scaler))
+ continue;
+ vp->scaler = scaler;
+ vp->state |= ST_VP_CONFIG;
+ }
+
+ spin_unlock_irqrestore(&camif->slock, flags);
+ }
+ mutex_unlock(&camif->lock);
+
+ v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %u, f_h: %u\n",
+ __func__, crop->left, crop->top, crop->width, crop->height,
+ camif->mbus_fmt.width, camif->mbus_fmt.height);
+
+ return 0;
+}
+
+static const struct v4l2_subdev_pad_ops s3c_camif_subdev_pad_ops = {
+ .enum_mbus_code = s3c_camif_subdev_enum_mbus_code,
+ .get_selection = s3c_camif_subdev_get_selection,
+ .set_selection = s3c_camif_subdev_set_selection,
+ .get_fmt = s3c_camif_subdev_get_fmt,
+ .set_fmt = s3c_camif_subdev_set_fmt,
+};
+
+static struct v4l2_subdev_ops s3c_camif_subdev_ops = {
+ .pad = &s3c_camif_subdev_pad_ops,
+};
+
+static int s3c_camif_subdev_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct camif_dev *camif = container_of(ctrl->handler, struct camif_dev,
+ ctrl_handler);
+ unsigned long flags;
+
+ spin_lock_irqsave(&camif->slock, flags);
+
+ switch (ctrl->id) {
+ case V4L2_CID_COLORFX:
+ camif->colorfx = camif->ctrl_colorfx->val;
+ /* Set Cb, Cr */
+ switch (ctrl->val) {
+ case V4L2_COLORFX_SEPIA:
+ camif->colorfx_cb = 115;
+ camif->colorfx_cr = 145;
+ break;
+ case V4L2_COLORFX_SET_CBCR:
+ camif->colorfx_cb = camif->ctrl_colorfx_cbcr->val >> 8;
+ camif->colorfx_cr = camif->ctrl_colorfx_cbcr->val & 0xff;
+ break;
+ default:
+ /* for V4L2_COLORFX_BW and others */
+ camif->colorfx_cb = 128;
+ camif->colorfx_cr = 128;
+ }
+ break;
+ case V4L2_CID_TEST_PATTERN:
+ camif->test_pattern = camif->ctrl_test_pattern->val;
+ break;
+ default:
+ WARN_ON(1);
+ }
+
+ camif->vp[VP_CODEC].state |= ST_VP_CONFIG;
+ camif->vp[VP_PREVIEW].state |= ST_VP_CONFIG;
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ return 0;
+}
+
+static const struct v4l2_ctrl_ops s3c_camif_subdev_ctrl_ops = {
+ .s_ctrl = s3c_camif_subdev_s_ctrl,
+};
+
+static const char * const s3c_camif_test_pattern_menu[] = {
+ "Disabled",
+ "Color bars",
+ "Horizontal increment",
+ "Vertical increment",
+};
+
+int s3c_camif_create_subdev(struct camif_dev *camif)
+{
+ struct v4l2_ctrl_handler *handler = &camif->ctrl_handler;
+ struct v4l2_subdev *sd = &camif->subdev;
+ int ret;
+
+ v4l2_subdev_init(sd, &s3c_camif_subdev_ops);
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ strlcpy(sd->name, "S3C-CAMIF", sizeof(sd->name));
+
+ camif->pads[CAMIF_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+ camif->pads[CAMIF_SD_PAD_SOURCE_C].flags = MEDIA_PAD_FL_SOURCE;
+ camif->pads[CAMIF_SD_PAD_SOURCE_P].flags = MEDIA_PAD_FL_SOURCE;
+
+ ret = media_entity_init(&sd->entity, CAMIF_SD_PADS_NUM,
+ camif->pads, 0);
+ if (ret)
+ return ret;
+
+ v4l2_ctrl_handler_init(handler, 3);
+ camif->ctrl_test_pattern = v4l2_ctrl_new_std_menu_items(handler,
+ &s3c_camif_subdev_ctrl_ops, V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(s3c_camif_test_pattern_menu) - 1, 0, 0,
+ s3c_camif_test_pattern_menu);
+
+ if (camif->variant->has_img_effect) {
+ camif->ctrl_colorfx = v4l2_ctrl_new_std_menu(handler,
+ &s3c_camif_subdev_ctrl_ops,
+ V4L2_CID_COLORFX, V4L2_COLORFX_SET_CBCR,
+ ~0x981f, V4L2_COLORFX_NONE);
+
+ camif->ctrl_colorfx_cbcr = v4l2_ctrl_new_std(handler,
+ &s3c_camif_subdev_ctrl_ops,
+ V4L2_CID_COLORFX_CBCR, 0, 0xffff, 1, 0);
+ }
+
+ if (handler->error) {
+ v4l2_ctrl_handler_free(handler);
+ media_entity_cleanup(&sd->entity);
+ return handler->error;
+ }
+
+ if (camif->variant->has_img_effect)
+ v4l2_ctrl_auto_cluster(2, &camif->ctrl_colorfx,
+ V4L2_COLORFX_SET_CBCR, false);
+
+ sd->ctrl_handler = handler;
+ v4l2_set_subdevdata(sd, camif);
+
+ return 0;
+}
+
+void s3c_camif_unregister_subdev(struct camif_dev *camif)
+{
+ struct v4l2_subdev *sd = &camif->subdev;
+
+ /* Return if not registered */
+ if (v4l2_get_subdevdata(sd) == NULL)
+ return;
+
+ v4l2_device_unregister_subdev(sd);
+ media_entity_cleanup(&sd->entity);
+ v4l2_ctrl_handler_free(&camif->ctrl_handler);
+ v4l2_set_subdevdata(sd, NULL);
+}
+
+int s3c_camif_set_defaults(struct camif_dev *camif)
+{
+ unsigned int ip_rev = camif->variant->ip_revision;
+ int i;
+
+ for (i = 0; i < CAMIF_VP_NUM; i++) {
+ struct camif_vp *vp = &camif->vp[i];
+ struct camif_frame *f = &vp->out_frame;
+
+ vp->camif = camif;
+ vp->id = i;
+ vp->offset = camif->variant->vp_offset;
+
+ if (ip_rev == S3C244X_CAMIF_IP_REV)
+ vp->fmt_flags = i ? FMT_FL_S3C24XX_PREVIEW :
+ FMT_FL_S3C24XX_CODEC;
+ else
+ vp->fmt_flags = FMT_FL_S3C64XX;
+
+ vp->out_fmt = s3c_camif_find_format(vp, NULL, 0);
+ BUG_ON(vp->out_fmt == NULL);
+
+ memset(f, 0, sizeof(*f));
+ f->f_width = CAMIF_DEF_WIDTH;
+ f->f_height = CAMIF_DEF_HEIGHT;
+ f->rect.width = CAMIF_DEF_WIDTH;
+ f->rect.height = CAMIF_DEF_HEIGHT;
+
+ /* Scaler is always enabled */
+ vp->scaler.enable = 1;
+
+ vp->payload = (f->f_width * f->f_height *
+ vp->out_fmt->depth) / 8;
+ }
+
+ memset(&camif->mbus_fmt, 0, sizeof(camif->mbus_fmt));
+ camif->mbus_fmt.width = CAMIF_DEF_WIDTH;
+ camif->mbus_fmt.height = CAMIF_DEF_HEIGHT;
+ camif->mbus_fmt.code = camif_mbus_formats[0];
+
+ memset(&camif->camif_crop, 0, sizeof(camif->camif_crop));
+ camif->camif_crop.width = CAMIF_DEF_WIDTH;
+ camif->camif_crop.height = CAMIF_DEF_HEIGHT;
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff