--- /dev/null
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Authors: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+
+#include "bdisp.h"
+
+#define BDISP_MAX_CTRL_NUM 10
+
+#define BDISP_WORK_TIMEOUT ((100 * HZ) / 1000)
+
+/* User configuration change */
+#define BDISP_PARAMS BIT(0) /* Config updated */
+#define BDISP_SRC_FMT BIT(1) /* Source set */
+#define BDISP_DST_FMT BIT(2) /* Destination set */
+#define BDISP_CTX_STOP_REQ BIT(3) /* Stop request */
+#define BDISP_CTX_ABORT BIT(4) /* Abort while device run */
+
+#define BDISP_MIN_W 1
+#define BDISP_MAX_W 8191
+#define BDISP_MIN_H 1
+#define BDISP_MAX_H 8191
+
+#define fh_to_ctx(__fh) container_of(__fh, struct bdisp_ctx, fh)
+
+enum bdisp_dev_flags {
+ ST_M2M_OPEN, /* Driver opened */
+ ST_M2M_RUNNING, /* HW device running */
+ ST_M2M_SUSPENDED, /* Driver suspended */
+ ST_M2M_SUSPENDING, /* Driver being suspended */
+};
+
+static const struct bdisp_fmt bdisp_formats[] = {
+ /* ARGB888. [31:0] A:R:G:B 8:8:8:8 little endian */
+ {
+ .pixelformat = V4L2_PIX_FMT_ABGR32, /* is actually ARGB */
+ .nb_planes = 1,
+ .bpp = 32,
+ .bpp_plane0 = 32,
+ .w_align = 1,
+ .h_align = 1
+ },
+ /* XRGB888. [31:0] x:R:G:B 8:8:8:8 little endian */
+ {
+ .pixelformat = V4L2_PIX_FMT_XBGR32, /* is actually xRGB */
+ .nb_planes = 1,
+ .bpp = 32,
+ .bpp_plane0 = 32,
+ .w_align = 1,
+ .h_align = 1
+ },
+ /* RGB565. [15:0] R:G:B 5:6:5 little endian */
+ {
+ .pixelformat = V4L2_PIX_FMT_RGB565,
+ .nb_planes = 1,
+ .bpp = 16,
+ .bpp_plane0 = 16,
+ .w_align = 1,
+ .h_align = 1
+ },
+ /* NV12. YUV420SP - 1 plane for Y + 1 plane for (CbCr) */
+ {
+ .pixelformat = V4L2_PIX_FMT_NV12,
+ .nb_planes = 2,
+ .bpp = 12,
+ .bpp_plane0 = 8,
+ .w_align = 2,
+ .h_align = 2
+ },
+ /* RGB888. [23:0] B:G:R 8:8:8 little endian */
+ {
+ .pixelformat = V4L2_PIX_FMT_RGB24,
+ .nb_planes = 1,
+ .bpp = 24,
+ .bpp_plane0 = 24,
+ .w_align = 1,
+ .h_align = 1
+ },
+ /* YU12. YUV420P - 1 plane for Y + 1 plane for Cb + 1 plane for Cr
+ * To keep as the LAST element of this table (no support on capture)
+ */
+ {
+ .pixelformat = V4L2_PIX_FMT_YUV420,
+ .nb_planes = 3,
+ .bpp = 12,
+ .bpp_plane0 = 8,
+ .w_align = 2,
+ .h_align = 2
+ }
+};
+
+/* Default format : HD ARGB32*/
+#define BDISP_DEF_WIDTH 1920
+#define BDISP_DEF_HEIGHT 1080
+
+static const struct bdisp_frame bdisp_dflt_fmt = {
+ .width = BDISP_DEF_WIDTH,
+ .height = BDISP_DEF_HEIGHT,
+ .fmt = &bdisp_formats[0],
+ .field = V4L2_FIELD_NONE,
+ .bytesperline = BDISP_DEF_WIDTH * 4,
+ .sizeimage = BDISP_DEF_WIDTH * BDISP_DEF_HEIGHT * 4,
+ .colorspace = V4L2_COLORSPACE_REC709,
+ .crop = {0, 0, BDISP_DEF_WIDTH, BDISP_DEF_HEIGHT},
+ .paddr = {0, 0, 0, 0}
+};
+
+static inline void bdisp_ctx_state_lock_set(u32 state, struct bdisp_ctx *ctx)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctx->bdisp_dev->slock, flags);
+ ctx->state |= state;
+ spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags);
+}
+
+static inline void bdisp_ctx_state_lock_clear(u32 state, struct bdisp_ctx *ctx)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctx->bdisp_dev->slock, flags);
+ ctx->state &= ~state;
+ spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags);
+}
+
+static inline bool bdisp_ctx_state_is_set(u32 mask, struct bdisp_ctx *ctx)
+{
+ unsigned long flags;
+ bool ret;
+
+ spin_lock_irqsave(&ctx->bdisp_dev->slock, flags);
+ ret = (ctx->state & mask) == mask;
+ spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags);
+
+ return ret;
+}
+
+static const struct bdisp_fmt *bdisp_find_fmt(u32 pixelformat)
+{
+ const struct bdisp_fmt *fmt;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(bdisp_formats); i++) {
+ fmt = &bdisp_formats[i];
+ if (fmt->pixelformat == pixelformat)
+ return fmt;
+ }
+
+ return NULL;
+}
+
+static struct bdisp_frame *ctx_get_frame(struct bdisp_ctx *ctx,
+ enum v4l2_buf_type type)
+{
+ switch (type) {
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+ return &ctx->src;
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ return &ctx->dst;
+ default:
+ dev_err(ctx->bdisp_dev->dev,
+ "Wrong buffer/video queue type (%d)\n", type);
+ break;
+ }
+
+ return ERR_PTR(-EINVAL);
+}
+
+static void bdisp_job_finish(struct bdisp_ctx *ctx, int vb_state)
+{
+ struct vb2_v4l2_buffer *src_vb, *dst_vb;
+
+ if (WARN(!ctx || !ctx->fh.m2m_ctx, "Null hardware context\n"))
+ return;
+
+ dev_dbg(ctx->bdisp_dev->dev, "%s\n", __func__);
+
+ src_vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+ dst_vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
+
+ if (src_vb && dst_vb) {
+ dst_vb->timestamp = src_vb->timestamp;
+ dst_vb->timecode = src_vb->timecode;
+ dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
+ dst_vb->flags |= src_vb->flags &
+ V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
+
+ v4l2_m2m_buf_done(src_vb, vb_state);
+ v4l2_m2m_buf_done(dst_vb, vb_state);
+
+ v4l2_m2m_job_finish(ctx->bdisp_dev->m2m.m2m_dev,
+ ctx->fh.m2m_ctx);
+ }
+}
+
+static int bdisp_ctx_stop_req(struct bdisp_ctx *ctx)
+{
+ struct bdisp_ctx *curr_ctx;
+ struct bdisp_dev *bdisp = ctx->bdisp_dev;
+ int ret;
+
+ dev_dbg(ctx->bdisp_dev->dev, "%s\n", __func__);
+
+ cancel_delayed_work(&bdisp->timeout_work);
+
+ curr_ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
+ if (!test_bit(ST_M2M_RUNNING, &bdisp->state) || (curr_ctx != ctx))
+ return 0;
+
+ bdisp_ctx_state_lock_set(BDISP_CTX_STOP_REQ, ctx);
+
+ ret = wait_event_timeout(bdisp->irq_queue,
+ !bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx),
+ BDISP_WORK_TIMEOUT);
+
+ if (!ret) {
+ dev_err(ctx->bdisp_dev->dev, "%s IRQ timeout\n", __func__);
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static void __bdisp_job_abort(struct bdisp_ctx *ctx)
+{
+ int ret;
+
+ ret = bdisp_ctx_stop_req(ctx);
+ if ((ret == -ETIMEDOUT) || (ctx->state & BDISP_CTX_ABORT)) {
+ bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ | BDISP_CTX_ABORT,
+ ctx);
+ bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
+ }
+}
+
+static void bdisp_job_abort(void *priv)
+{
+ __bdisp_job_abort((struct bdisp_ctx *)priv);
+}
+
+static int bdisp_get_addr(struct bdisp_ctx *ctx, struct vb2_buffer *vb,
+ struct bdisp_frame *frame, dma_addr_t *paddr)
+{
+ if (!vb || !frame)
+ return -EINVAL;
+
+ paddr[0] = vb2_dma_contig_plane_dma_addr(vb, 0);
+
+ if (frame->fmt->nb_planes > 1)
+ /* UV (NV12) or U (420P) */
+ paddr[1] = (dma_addr_t)(paddr[0] +
+ frame->bytesperline * frame->height);
+
+ if (frame->fmt->nb_planes > 2)
+ /* V (420P) */
+ paddr[2] = (dma_addr_t)(paddr[1] +
+ (frame->bytesperline * frame->height) / 4);
+
+ if (frame->fmt->nb_planes > 3)
+ dev_dbg(ctx->bdisp_dev->dev, "ignoring some planes\n");
+
+ dev_dbg(ctx->bdisp_dev->dev,
+ "%s plane[0]=%pad plane[1]=%pad plane[2]=%pad\n",
+ __func__, &paddr[0], &paddr[1], &paddr[2]);
+
+ return 0;
+}
+
+static int bdisp_get_bufs(struct bdisp_ctx *ctx)
+{
+ struct bdisp_frame *src, *dst;
+ struct vb2_v4l2_buffer *src_vb, *dst_vb;
+ int ret;
+
+ src = &ctx->src;
+ dst = &ctx->dst;
+
+ src_vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
+ ret = bdisp_get_addr(ctx, &src_vb->vb2_buf, src, src->paddr);
+ if (ret)
+ return ret;
+
+ dst_vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
+ ret = bdisp_get_addr(ctx, &dst_vb->vb2_buf, dst, dst->paddr);
+ if (ret)
+ return ret;
+
+ dst_vb->timestamp = src_vb->timestamp;
+
+ return 0;
+}
+
+static void bdisp_device_run(void *priv)
+{
+ struct bdisp_ctx *ctx = priv;
+ struct bdisp_dev *bdisp;
+ unsigned long flags;
+ int err = 0;
+
+ if (WARN(!ctx, "Null hardware context\n"))
+ return;
+
+ bdisp = ctx->bdisp_dev;
+ dev_dbg(bdisp->dev, "%s\n", __func__);
+ spin_lock_irqsave(&bdisp->slock, flags);
+
+ if (bdisp->m2m.ctx != ctx) {
+ dev_dbg(bdisp->dev, "ctx updated: %p -> %p\n",
+ bdisp->m2m.ctx, ctx);
+ ctx->state |= BDISP_PARAMS;
+ bdisp->m2m.ctx = ctx;
+ }
+
+ if (ctx->state & BDISP_CTX_STOP_REQ) {
+ ctx->state &= ~BDISP_CTX_STOP_REQ;
+ ctx->state |= BDISP_CTX_ABORT;
+ wake_up(&bdisp->irq_queue);
+ goto out;
+ }
+
+ err = bdisp_get_bufs(ctx);
+ if (err) {
+ dev_err(bdisp->dev, "cannot get address\n");
+ goto out;
+ }
+
+ bdisp_dbg_perf_begin(bdisp);
+
+ err = bdisp_hw_reset(bdisp);
+ if (err) {
+ dev_err(bdisp->dev, "could not get HW ready\n");
+ goto out;
+ }
+
+ err = bdisp_hw_update(ctx);
+ if (err) {
+ dev_err(bdisp->dev, "could not send HW request\n");
+ goto out;
+ }
+
+ queue_delayed_work(bdisp->work_queue, &bdisp->timeout_work,
+ BDISP_WORK_TIMEOUT);
+ set_bit(ST_M2M_RUNNING, &bdisp->state);
+out:
+ ctx->state &= ~BDISP_PARAMS;
+ spin_unlock_irqrestore(&bdisp->slock, flags);
+ if (err)
+ bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
+}
+
+static struct v4l2_m2m_ops bdisp_m2m_ops = {
+ .device_run = bdisp_device_run,
+ .job_abort = bdisp_job_abort,
+};
+
+static int __bdisp_s_ctrl(struct bdisp_ctx *ctx, struct v4l2_ctrl *ctrl)
+{
+ if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_HFLIP:
+ ctx->hflip = ctrl->val;
+ break;
+ case V4L2_CID_VFLIP:
+ ctx->vflip = ctrl->val;
+ break;
+ default:
+ dev_err(ctx->bdisp_dev->dev, "unknown control %d\n", ctrl->id);
+ return -EINVAL;
+ }
+
+ ctx->state |= BDISP_PARAMS;
+
+ return 0;
+}
+
+static int bdisp_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct bdisp_ctx *ctx = container_of(ctrl->handler, struct bdisp_ctx,
+ ctrl_handler);
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&ctx->bdisp_dev->slock, flags);
+ ret = __bdisp_s_ctrl(ctx, ctrl);
+ spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags);
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops bdisp_c_ops = {
+ .s_ctrl = bdisp_s_ctrl,
+};
+
+static int bdisp_ctrls_create(struct bdisp_ctx *ctx)
+{
+ if (ctx->ctrls_rdy)
+ return 0;
+
+ v4l2_ctrl_handler_init(&ctx->ctrl_handler, BDISP_MAX_CTRL_NUM);
+
+ ctx->bdisp_ctrls.hflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
+ &bdisp_c_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
+ ctx->bdisp_ctrls.vflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
+ &bdisp_c_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
+
+ if (ctx->ctrl_handler.error) {
+ int err = ctx->ctrl_handler.error;
+
+ v4l2_ctrl_handler_free(&ctx->ctrl_handler);
+ return err;
+ }
+
+ ctx->ctrls_rdy = true;
+
+ return 0;
+}
+
+static void bdisp_ctrls_delete(struct bdisp_ctx *ctx)
+{
+ if (ctx->ctrls_rdy) {
+ v4l2_ctrl_handler_free(&ctx->ctrl_handler);
+ ctx->ctrls_rdy = false;
+ }
+}
+
+static int bdisp_queue_setup(struct vb2_queue *vq,
+ const void *parg,
+ unsigned int *nb_buf, unsigned int *nb_planes,
+ unsigned int sizes[], void *allocators[])
+{
+ const struct v4l2_format *fmt = parg;
+ struct bdisp_ctx *ctx = vb2_get_drv_priv(vq);
+ struct bdisp_frame *frame = ctx_get_frame(ctx, vq->type);
+
+ if (IS_ERR(frame)) {
+ dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
+ return PTR_ERR(frame);
+ }
+
+ if (!frame->fmt) {
+ dev_err(ctx->bdisp_dev->dev, "Invalid format\n");
+ return -EINVAL;
+ }
+
+ if (fmt && fmt->fmt.pix.sizeimage < frame->sizeimage)
+ return -EINVAL;
+
+ *nb_planes = 1;
+ sizes[0] = fmt ? fmt->fmt.pix.sizeimage : frame->sizeimage;
+ allocators[0] = ctx->bdisp_dev->alloc_ctx;
+
+ return 0;
+}
+
+static int bdisp_buf_prepare(struct vb2_buffer *vb)
+{
+ struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+ struct bdisp_frame *frame = ctx_get_frame(ctx, vb->vb2_queue->type);
+
+ if (IS_ERR(frame)) {
+ dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
+ return PTR_ERR(frame);
+ }
+
+ if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ vb2_set_plane_payload(vb, 0, frame->sizeimage);
+
+ return 0;
+}
+
+static void bdisp_buf_queue(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+
+ /* return to V4L2 any 0-size buffer so it can be dequeued by user */
+ if (!vb2_get_plane_payload(vb, 0)) {
+ dev_dbg(ctx->bdisp_dev->dev, "0 data buffer, skip it\n");
+ vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+ return;
+ }
+
+ if (ctx->fh.m2m_ctx)
+ v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
+}
+
+static int bdisp_start_streaming(struct vb2_queue *q, unsigned int count)
+{
+ struct bdisp_ctx *ctx = q->drv_priv;
+ struct vb2_v4l2_buffer *buf;
+ int ret = pm_runtime_get_sync(ctx->bdisp_dev->dev);
+
+ if (ret < 0) {
+ dev_err(ctx->bdisp_dev->dev, "failed to set runtime PM\n");
+
+ if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
+ while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
+ v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
+ } else {
+ while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
+ v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
+ }
+
+ return ret;
+ }
+
+ return 0;
+}
+
+static void bdisp_stop_streaming(struct vb2_queue *q)
+{
+ struct bdisp_ctx *ctx = q->drv_priv;
+
+ __bdisp_job_abort(ctx);
+
+ pm_runtime_put(ctx->bdisp_dev->dev);
+}
+
+static struct vb2_ops bdisp_qops = {
+ .queue_setup = bdisp_queue_setup,
+ .buf_prepare = bdisp_buf_prepare,
+ .buf_queue = bdisp_buf_queue,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .stop_streaming = bdisp_stop_streaming,
+ .start_streaming = bdisp_start_streaming,
+};
+
+static int queue_init(void *priv,
+ struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
+{
+ struct bdisp_ctx *ctx = priv;
+ int ret;
+
+ memset(src_vq, 0, sizeof(*src_vq));
+ src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+ src_vq->drv_priv = ctx;
+ src_vq->ops = &bdisp_qops;
+ src_vq->mem_ops = &vb2_dma_contig_memops;
+ src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+ src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ src_vq->lock = &ctx->bdisp_dev->lock;
+
+ ret = vb2_queue_init(src_vq);
+ if (ret)
+ return ret;
+
+ memset(dst_vq, 0, sizeof(*dst_vq));
+ dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+ dst_vq->drv_priv = ctx;
+ dst_vq->ops = &bdisp_qops;
+ dst_vq->mem_ops = &vb2_dma_contig_memops;
+ dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+ dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ dst_vq->lock = &ctx->bdisp_dev->lock;
+
+ return vb2_queue_init(dst_vq);
+}
+
+static int bdisp_open(struct file *file)
+{
+ struct bdisp_dev *bdisp = video_drvdata(file);
+ struct bdisp_ctx *ctx = NULL;
+ int ret;
+
+ if (mutex_lock_interruptible(&bdisp->lock))
+ return -ERESTARTSYS;
+
+ /* Allocate memory for both context and node */
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx) {
+ ret = -ENOMEM;
+ goto unlock;
+ }
+ ctx->bdisp_dev = bdisp;
+
+ if (bdisp_hw_alloc_nodes(ctx)) {
+ dev_err(bdisp->dev, "no memory for nodes\n");
+ ret = -ENOMEM;
+ goto mem_ctx;
+ }
+
+ v4l2_fh_init(&ctx->fh, bdisp->m2m.vdev);
+
+ ret = bdisp_ctrls_create(ctx);
+ if (ret) {
+ dev_err(bdisp->dev, "Failed to create control\n");
+ goto error_fh;
+ }
+
+ /* Use separate control handler per file handle */
+ ctx->fh.ctrl_handler = &ctx->ctrl_handler;
+ file->private_data = &ctx->fh;
+ v4l2_fh_add(&ctx->fh);
+
+ /* Default format */
+ ctx->src = bdisp_dflt_fmt;
+ ctx->dst = bdisp_dflt_fmt;
+
+ /* Setup the device context for mem2mem mode. */
+ ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(bdisp->m2m.m2m_dev, ctx,
+ queue_init);
+ if (IS_ERR(ctx->fh.m2m_ctx)) {
+ dev_err(bdisp->dev, "Failed to initialize m2m context\n");
+ ret = PTR_ERR(ctx->fh.m2m_ctx);
+ goto error_ctrls;
+ }
+
+ bdisp->m2m.refcnt++;
+ set_bit(ST_M2M_OPEN, &bdisp->state);
+
+ dev_dbg(bdisp->dev, "driver opened, ctx = 0x%p\n", ctx);
+
+ mutex_unlock(&bdisp->lock);
+
+ return 0;
+
+error_ctrls:
+ bdisp_ctrls_delete(ctx);
+error_fh:
+ v4l2_fh_del(&ctx->fh);
+ v4l2_fh_exit(&ctx->fh);
+ bdisp_hw_free_nodes(ctx);
+mem_ctx:
+ kfree(ctx);
+unlock:
+ mutex_unlock(&bdisp->lock);
+
+ return ret;
+}
+
+static int bdisp_release(struct file *file)
+{
+ struct bdisp_ctx *ctx = fh_to_ctx(file->private_data);
+ struct bdisp_dev *bdisp = ctx->bdisp_dev;
+
+ dev_dbg(bdisp->dev, "%s\n", __func__);
+
+ if (mutex_lock_interruptible(&bdisp->lock))
+ return -ERESTARTSYS;
+
+ v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
+
+ bdisp_ctrls_delete(ctx);
+
+ v4l2_fh_del(&ctx->fh);
+ v4l2_fh_exit(&ctx->fh);
+
+ if (--bdisp->m2m.refcnt <= 0)
+ clear_bit(ST_M2M_OPEN, &bdisp->state);
+
+ bdisp_hw_free_nodes(ctx);
+
+ kfree(ctx);
+
+ mutex_unlock(&bdisp->lock);
+
+ return 0;
+}
+
+static const struct v4l2_file_operations bdisp_fops = {
+ .owner = THIS_MODULE,
+ .open = bdisp_open,
+ .release = bdisp_release,
+ .poll = v4l2_m2m_fop_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = v4l2_m2m_fop_mmap,
+};
+
+static int bdisp_querycap(struct file *file, void *fh,
+ struct v4l2_capability *cap)
+{
+ struct bdisp_ctx *ctx = fh_to_ctx(fh);
+ struct bdisp_dev *bdisp = ctx->bdisp_dev;
+
+ strlcpy(cap->driver, bdisp->pdev->name, sizeof(cap->driver));
+ strlcpy(cap->card, bdisp->pdev->name, sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s%d",
+ BDISP_NAME, bdisp->id);
+
+ cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M;
+
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+ return 0;
+}
+
+static int bdisp_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
+{
+ struct bdisp_ctx *ctx = fh_to_ctx(fh);
+ const struct bdisp_fmt *fmt;
+
+ if (f->index >= ARRAY_SIZE(bdisp_formats))
+ return -EINVAL;
+
+ fmt = &bdisp_formats[f->index];
+
+ if ((fmt->pixelformat == V4L2_PIX_FMT_YUV420) &&
+ (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
+ dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
+ return -EINVAL;
+ }
+ f->pixelformat = fmt->pixelformat;
+
+ return 0;
+}
+
+static int bdisp_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct bdisp_ctx *ctx = fh_to_ctx(fh);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct bdisp_frame *frame = ctx_get_frame(ctx, f->type);
+
+ if (IS_ERR(frame)) {
+ dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
+ return PTR_ERR(frame);
+ }
+
+ pix = &f->fmt.pix;
+ pix->width = frame->width;
+ pix->height = frame->height;
+ pix->pixelformat = frame->fmt->pixelformat;
+ pix->field = frame->field;
+ pix->bytesperline = frame->bytesperline;
+ pix->sizeimage = frame->sizeimage;
+ pix->colorspace = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
+ frame->colorspace : bdisp_dflt_fmt.colorspace;
+
+ return 0;
+}
+
+static int bdisp_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct bdisp_ctx *ctx = fh_to_ctx(fh);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ const struct bdisp_fmt *format;
+ u32 in_w, in_h;
+
+ format = bdisp_find_fmt(pix->pixelformat);
+ if (!format) {
+ dev_dbg(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
+ pix->pixelformat);
+ return -EINVAL;
+ }
+
+ /* YUV420P only supported for VIDEO_OUTPUT */
+ if ((format->pixelformat == V4L2_PIX_FMT_YUV420) &&
+ (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
+ dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
+ return -EINVAL;
+ }
+
+ /* Field (interlaced only supported on OUTPUT) */
+ if ((f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ||
+ (pix->field != V4L2_FIELD_INTERLACED))
+ pix->field = V4L2_FIELD_NONE;
+
+ /* Adjust width & height */
+ in_w = pix->width;
+ in_h = pix->height;
+ v4l_bound_align_image(&pix->width,
+ BDISP_MIN_W, BDISP_MAX_W,
+ ffs(format->w_align) - 1,
+ &pix->height,
+ BDISP_MIN_H, BDISP_MAX_H,
+ ffs(format->h_align) - 1,
+ 0);
+ if ((pix->width != in_w) || (pix->height != in_h))
+ dev_dbg(ctx->bdisp_dev->dev,
+ "%s size updated: %dx%d -> %dx%d\n", __func__,
+ in_w, in_h, pix->width, pix->height);
+
+ pix->bytesperline = (pix->width * format->bpp_plane0) / 8;
+ pix->sizeimage = (pix->width * pix->height * format->bpp) / 8;
+
+ if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ pix->colorspace = bdisp_dflt_fmt.colorspace;
+
+ return 0;
+}
+
+static int bdisp_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct bdisp_ctx *ctx = fh_to_ctx(fh);
+ struct vb2_queue *vq;
+ struct bdisp_frame *frame;
+ struct v4l2_pix_format *pix;
+ int ret;
+ u32 state;
+
+ ret = bdisp_try_fmt(file, fh, f);
+ if (ret) {
+ dev_err(ctx->bdisp_dev->dev, "Cannot set format\n");
+ return ret;
+ }
+
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
+ if (vb2_is_streaming(vq)) {
+ dev_err(ctx->bdisp_dev->dev, "queue (%d) busy\n", f->type);
+ return -EBUSY;
+ }
+
+ frame = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
+ &ctx->src : &ctx->dst;
+ pix = &f->fmt.pix;
+ frame->fmt = bdisp_find_fmt(pix->pixelformat);
+ if (!frame->fmt) {
+ dev_err(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
+ pix->pixelformat);
+ return -EINVAL;
+ }
+
+ frame->width = pix->width;
+ frame->height = pix->height;
+ frame->bytesperline = pix->bytesperline;
+ frame->sizeimage = pix->sizeimage;
+ frame->field = pix->field;
+ if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
+ frame->colorspace = pix->colorspace;
+
+ frame->crop.width = frame->width;
+ frame->crop.height = frame->height;
+ frame->crop.left = 0;
+ frame->crop.top = 0;
+
+ state = BDISP_PARAMS;
+ state |= (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
+ BDISP_DST_FMT : BDISP_SRC_FMT;
+ bdisp_ctx_state_lock_set(state, ctx);
+
+ return 0;
+}
+
+static int bdisp_g_selection(struct file *file, void *fh,
+ struct v4l2_selection *s)
+{
+ struct bdisp_frame *frame;
+ struct bdisp_ctx *ctx = fh_to_ctx(fh);
+
+ frame = ctx_get_frame(ctx, s->type);
+ if (IS_ERR(frame)) {
+ dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
+ return PTR_ERR(frame);
+ }
+
+ switch (s->type) {
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+ switch (s->target) {
+ case V4L2_SEL_TGT_CROP:
+ /* cropped frame */
+ s->r = frame->crop;
+ break;
+ case V4L2_SEL_TGT_CROP_DEFAULT:
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ /* complete frame */
+ s->r.left = 0;
+ s->r.top = 0;
+ s->r.width = frame->width;
+ s->r.height = frame->height;
+ break;
+ default:
+ dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
+ return -EINVAL;
+ }
+ break;
+
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ switch (s->target) {
+ case V4L2_SEL_TGT_COMPOSE:
+ case V4L2_SEL_TGT_COMPOSE_PADDED:
+ /* composed (cropped) frame */
+ s->r = frame->crop;
+ break;
+ case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+ case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+ /* complete frame */
+ s->r.left = 0;
+ s->r.top = 0;
+ s->r.width = frame->width;
+ s->r.height = frame->height;
+ break;
+ default:
+ dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
+ return -EINVAL;
+ }
+ break;
+
+ default:
+ dev_err(ctx->bdisp_dev->dev, "Invalid type\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int is_rect_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
+{
+ /* Return 1 if a is enclosed in b, or 0 otherwise. */
+
+ if (a->left < b->left || a->top < b->top)
+ return 0;
+
+ if (a->left + a->width > b->left + b->width)
+ return 0;
+
+ if (a->top + a->height > b->top + b->height)
+ return 0;
+
+ return 1;
+}
+
+static int bdisp_s_selection(struct file *file, void *fh,
+ struct v4l2_selection *s)
+{
+ struct bdisp_frame *frame;
+ struct bdisp_ctx *ctx = fh_to_ctx(fh);
+ struct v4l2_rect *in, out;
+ bool valid = false;
+
+ if ((s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
+ (s->target == V4L2_SEL_TGT_CROP))
+ valid = true;
+
+ if ((s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
+ (s->target == V4L2_SEL_TGT_COMPOSE))
+ valid = true;
+
+ if (!valid) {
+ dev_err(ctx->bdisp_dev->dev, "Invalid type / target\n");
+ return -EINVAL;
+ }
+
+ frame = ctx_get_frame(ctx, s->type);
+ if (IS_ERR(frame)) {
+ dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
+ return PTR_ERR(frame);
+ }
+
+ in = &s->r;
+ out = *in;
+
+ /* Align and check origin */
+ out.left = ALIGN(in->left, frame->fmt->w_align);
+ out.top = ALIGN(in->top, frame->fmt->h_align);
+
+ if ((out.left < 0) || (out.left >= frame->width) ||
+ (out.top < 0) || (out.top >= frame->height)) {
+ dev_err(ctx->bdisp_dev->dev,
+ "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
+ out.width, out.height, out.left, out.top,
+ frame->width, frame->height);
+ return -EINVAL;
+ }
+
+ /* Align and check size */
+ out.width = ALIGN(in->width, frame->fmt->w_align);
+ out.height = ALIGN(in->height, frame->fmt->w_align);
+
+ if (((out.left + out.width) > frame->width) ||
+ ((out.top + out.height) > frame->height)) {
+ dev_err(ctx->bdisp_dev->dev,
+ "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
+ out.width, out.height, out.left, out.top,
+ frame->width, frame->height);
+ return -EINVAL;
+ }
+
+ /* Checks adjust constraints flags */
+ if (s->flags & V4L2_SEL_FLAG_LE && !is_rect_enclosed(&out, in))
+ return -ERANGE;
+
+ if (s->flags & V4L2_SEL_FLAG_GE && !is_rect_enclosed(in, &out))
+ return -ERANGE;
+
+ if ((out.left != in->left) || (out.top != in->top) ||
+ (out.width != in->width) || (out.height != in->height)) {
+ dev_dbg(ctx->bdisp_dev->dev,
+ "%s crop updated: %dx%d@(%d,%d) -> %dx%d@(%d,%d)\n",
+ __func__, in->width, in->height, in->left, in->top,
+ out.width, out.height, out.left, out.top);
+ *in = out;
+ }
+
+ frame->crop = out;
+
+ bdisp_ctx_state_lock_set(BDISP_PARAMS, ctx);
+
+ return 0;
+}
+
+static int bdisp_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
+{
+ struct bdisp_ctx *ctx = fh_to_ctx(fh);
+
+ if ((type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
+ !bdisp_ctx_state_is_set(BDISP_SRC_FMT, ctx)) {
+ dev_err(ctx->bdisp_dev->dev, "src not defined\n");
+ return -EINVAL;
+ }
+
+ if ((type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
+ !bdisp_ctx_state_is_set(BDISP_DST_FMT, ctx)) {
+ dev_err(ctx->bdisp_dev->dev, "dst not defined\n");
+ return -EINVAL;
+ }
+
+ return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);
+}
+
+static const struct v4l2_ioctl_ops bdisp_ioctl_ops = {
+ .vidioc_querycap = bdisp_querycap,
+ .vidioc_enum_fmt_vid_cap = bdisp_enum_fmt,
+ .vidioc_enum_fmt_vid_out = bdisp_enum_fmt,
+ .vidioc_g_fmt_vid_cap = bdisp_g_fmt,
+ .vidioc_g_fmt_vid_out = bdisp_g_fmt,
+ .vidioc_try_fmt_vid_cap = bdisp_try_fmt,
+ .vidioc_try_fmt_vid_out = bdisp_try_fmt,
+ .vidioc_s_fmt_vid_cap = bdisp_s_fmt,
+ .vidioc_s_fmt_vid_out = bdisp_s_fmt,
+ .vidioc_g_selection = bdisp_g_selection,
+ .vidioc_s_selection = bdisp_s_selection,
+ .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
+ .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
+ .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
+ .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
+ .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
+ .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
+ .vidioc_streamon = bdisp_streamon,
+ .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static int bdisp_register_device(struct bdisp_dev *bdisp)
+{
+ int ret;
+
+ if (!bdisp)
+ return -ENODEV;
+
+ bdisp->vdev.fops = &bdisp_fops;
+ bdisp->vdev.ioctl_ops = &bdisp_ioctl_ops;
+ bdisp->vdev.release = video_device_release_empty;
+ bdisp->vdev.lock = &bdisp->lock;
+ bdisp->vdev.vfl_dir = VFL_DIR_M2M;
+ bdisp->vdev.v4l2_dev = &bdisp->v4l2_dev;
+ snprintf(bdisp->vdev.name, sizeof(bdisp->vdev.name), "%s.%d",
+ BDISP_NAME, bdisp->id);
+
+ video_set_drvdata(&bdisp->vdev, bdisp);
+
+ bdisp->m2m.vdev = &bdisp->vdev;
+ bdisp->m2m.m2m_dev = v4l2_m2m_init(&bdisp_m2m_ops);
+ if (IS_ERR(bdisp->m2m.m2m_dev)) {
+ dev_err(bdisp->dev, "failed to initialize v4l2-m2m device\n");
+ return PTR_ERR(bdisp->m2m.m2m_dev);
+ }
+
+ ret = video_register_device(&bdisp->vdev, VFL_TYPE_GRABBER, -1);
+ if (ret) {
+ dev_err(bdisp->dev,
+ "%s(): failed to register video device\n", __func__);
+ v4l2_m2m_release(bdisp->m2m.m2m_dev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void bdisp_unregister_device(struct bdisp_dev *bdisp)
+{
+ if (!bdisp)
+ return;
+
+ if (bdisp->m2m.m2m_dev)
+ v4l2_m2m_release(bdisp->m2m.m2m_dev);
+
+ video_unregister_device(bdisp->m2m.vdev);
+}
+
+static irqreturn_t bdisp_irq_thread(int irq, void *priv)
+{
+ struct bdisp_dev *bdisp = priv;
+ struct bdisp_ctx *ctx;
+
+ spin_lock(&bdisp->slock);
+
+ bdisp_dbg_perf_end(bdisp);
+
+ cancel_delayed_work(&bdisp->timeout_work);
+
+ if (!test_and_clear_bit(ST_M2M_RUNNING, &bdisp->state))
+ goto isr_unlock;
+
+ if (test_and_clear_bit(ST_M2M_SUSPENDING, &bdisp->state)) {
+ set_bit(ST_M2M_SUSPENDED, &bdisp->state);
+ wake_up(&bdisp->irq_queue);
+ goto isr_unlock;
+ }
+
+ ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
+ if (!ctx || !ctx->fh.m2m_ctx)
+ goto isr_unlock;
+
+ spin_unlock(&bdisp->slock);
+
+ bdisp_job_finish(ctx, VB2_BUF_STATE_DONE);
+
+ if (bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx)) {
+ bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ, ctx);
+ wake_up(&bdisp->irq_queue);
+ }
+
+ return IRQ_HANDLED;
+
+isr_unlock:
+ spin_unlock(&bdisp->slock);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t bdisp_irq_handler(int irq, void *priv)
+{
+ if (bdisp_hw_get_and_clear_irq((struct bdisp_dev *)priv))
+ return IRQ_NONE;
+ else
+ return IRQ_WAKE_THREAD;
+}
+
+static void bdisp_irq_timeout(struct work_struct *ptr)
+{
+ struct delayed_work *twork = to_delayed_work(ptr);
+ struct bdisp_dev *bdisp = container_of(twork, struct bdisp_dev,
+ timeout_work);
+ struct bdisp_ctx *ctx;
+
+ ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
+
+ dev_err(ctx->bdisp_dev->dev, "Device work timeout\n");
+
+ spin_lock(&bdisp->slock);
+ clear_bit(ST_M2M_RUNNING, &bdisp->state);
+ spin_unlock(&bdisp->slock);
+
+ bdisp_hw_reset(bdisp);
+
+ bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
+}
+
+static int bdisp_m2m_suspend(struct bdisp_dev *bdisp)
+{
+ unsigned long flags;
+ int timeout;
+
+ spin_lock_irqsave(&bdisp->slock, flags);
+ if (!test_bit(ST_M2M_RUNNING, &bdisp->state)) {
+ spin_unlock_irqrestore(&bdisp->slock, flags);
+ return 0;
+ }
+ clear_bit(ST_M2M_SUSPENDED, &bdisp->state);
+ set_bit(ST_M2M_SUSPENDING, &bdisp->state);
+ spin_unlock_irqrestore(&bdisp->slock, flags);
+
+ timeout = wait_event_timeout(bdisp->irq_queue,
+ test_bit(ST_M2M_SUSPENDED, &bdisp->state),
+ BDISP_WORK_TIMEOUT);
+
+ clear_bit(ST_M2M_SUSPENDING, &bdisp->state);
+
+ if (!timeout) {
+ dev_err(bdisp->dev, "%s IRQ timeout\n", __func__);
+ return -EAGAIN;
+ }
+
+ return 0;
+}
+
+static int bdisp_m2m_resume(struct bdisp_dev *bdisp)
+{
+ struct bdisp_ctx *ctx;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bdisp->slock, flags);
+ ctx = bdisp->m2m.ctx;
+ bdisp->m2m.ctx = NULL;
+ spin_unlock_irqrestore(&bdisp->slock, flags);
+
+ if (test_and_clear_bit(ST_M2M_SUSPENDED, &bdisp->state))
+ bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
+
+ return 0;
+}
+
+static int bdisp_runtime_resume(struct device *dev)
+{
+ struct bdisp_dev *bdisp = dev_get_drvdata(dev);
+ int ret = clk_enable(bdisp->clock);
+
+ if (ret)
+ return ret;
+
+ return bdisp_m2m_resume(bdisp);
+}
+
+static int bdisp_runtime_suspend(struct device *dev)
+{
+ struct bdisp_dev *bdisp = dev_get_drvdata(dev);
+ int ret = bdisp_m2m_suspend(bdisp);
+
+ if (!ret)
+ clk_disable(bdisp->clock);
+
+ return ret;
+}
+
+static int bdisp_resume(struct device *dev)
+{
+ struct bdisp_dev *bdisp = dev_get_drvdata(dev);
+ unsigned long flags;
+ int opened;
+
+ spin_lock_irqsave(&bdisp->slock, flags);
+ opened = test_bit(ST_M2M_OPEN, &bdisp->state);
+ spin_unlock_irqrestore(&bdisp->slock, flags);
+
+ if (!opened)
+ return 0;
+
+ if (!pm_runtime_suspended(dev))
+ return bdisp_runtime_resume(dev);
+
+ return 0;
+}
+
+static int bdisp_suspend(struct device *dev)
+{
+ if (!pm_runtime_suspended(dev))
+ return bdisp_runtime_suspend(dev);
+
+ return 0;
+}
+
+static const struct dev_pm_ops bdisp_pm_ops = {
+ .suspend = bdisp_suspend,
+ .resume = bdisp_resume,
+ .runtime_suspend = bdisp_runtime_suspend,
+ .runtime_resume = bdisp_runtime_resume,
+};
+
+static int bdisp_remove(struct platform_device *pdev)
+{
+ struct bdisp_dev *bdisp = platform_get_drvdata(pdev);
+
+ bdisp_unregister_device(bdisp);
+
+ bdisp_hw_free_filters(bdisp->dev);
+
+ vb2_dma_contig_cleanup_ctx(bdisp->alloc_ctx);
+
+ pm_runtime_disable(&pdev->dev);
+
+ bdisp_debugfs_remove(bdisp);
+
+ v4l2_device_unregister(&bdisp->v4l2_dev);
+
+ if (!IS_ERR(bdisp->clock))
+ clk_unprepare(bdisp->clock);
+
+ dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
+
+ return 0;
+}
+
+static int bdisp_probe(struct platform_device *pdev)
+{
+ struct bdisp_dev *bdisp;
+ struct resource *res;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ bdisp = devm_kzalloc(dev, sizeof(struct bdisp_dev), GFP_KERNEL);
+ if (!bdisp)
+ return -ENOMEM;
+
+ bdisp->pdev = pdev;
+ bdisp->dev = dev;
+ platform_set_drvdata(pdev, bdisp);
+
+ if (dev->of_node)
+ bdisp->id = of_alias_get_id(pdev->dev.of_node, BDISP_NAME);
+ else
+ bdisp->id = pdev->id;
+
+ init_waitqueue_head(&bdisp->irq_queue);
+ INIT_DELAYED_WORK(&bdisp->timeout_work, bdisp_irq_timeout);
+ bdisp->work_queue = create_workqueue(BDISP_NAME);
+
+ spin_lock_init(&bdisp->slock);
+ mutex_init(&bdisp->lock);
+
+ /* get resources */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ bdisp->regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(bdisp->regs)) {
+ dev_err(dev, "failed to get regs\n");
+ return PTR_ERR(bdisp->regs);
+ }
+
+ bdisp->clock = devm_clk_get(dev, BDISP_NAME);
+ if (IS_ERR(bdisp->clock)) {
+ dev_err(dev, "failed to get clock\n");
+ return PTR_ERR(bdisp->clock);
+ }
+
+ ret = clk_prepare(bdisp->clock);
+ if (ret < 0) {
+ dev_err(dev, "clock prepare failed\n");
+ bdisp->clock = ERR_PTR(-EINVAL);
+ return ret;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(dev, "failed to get IRQ resource\n");
+ goto err_clk;
+ }
+
+ ret = devm_request_threaded_irq(dev, res->start, bdisp_irq_handler,
+ bdisp_irq_thread, IRQF_ONESHOT,
+ pdev->name, bdisp);
+ if (ret) {
+ dev_err(dev, "failed to install irq\n");
+ goto err_clk;
+ }
+
+ /* v4l2 register */
+ ret = v4l2_device_register(dev, &bdisp->v4l2_dev);
+ if (ret) {
+ dev_err(dev, "failed to register\n");
+ goto err_clk;
+ }
+
+ /* Debug */
+ ret = bdisp_debugfs_create(bdisp);
+ if (ret) {
+ dev_err(dev, "failed to create debugfs\n");
+ goto err_v4l2;
+ }
+
+ /* Power management */
+ pm_runtime_enable(dev);
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0) {
+ dev_err(dev, "failed to set PM\n");
+ goto err_dbg;
+ }
+
+ /* Continuous memory allocator */
+ bdisp->alloc_ctx = vb2_dma_contig_init_ctx(dev);
+ if (IS_ERR(bdisp->alloc_ctx)) {
+ ret = PTR_ERR(bdisp->alloc_ctx);
+ goto err_pm;
+ }
+
+ /* Filters */
+ if (bdisp_hw_alloc_filters(bdisp->dev)) {
+ dev_err(bdisp->dev, "no memory for filters\n");
+ ret = -ENOMEM;
+ goto err_vb2_dma;
+ }
+
+ /* Register */
+ ret = bdisp_register_device(bdisp);
+ if (ret) {
+ dev_err(dev, "failed to register\n");
+ goto err_filter;
+ }
+
+ dev_info(dev, "%s%d registered as /dev/video%d\n", BDISP_NAME,
+ bdisp->id, bdisp->vdev.num);
+
+ pm_runtime_put(dev);
+
+ return 0;
+
+err_filter:
+ bdisp_hw_free_filters(bdisp->dev);
+err_vb2_dma:
+ vb2_dma_contig_cleanup_ctx(bdisp->alloc_ctx);
+err_pm:
+ pm_runtime_put(dev);
+err_dbg:
+ bdisp_debugfs_remove(bdisp);
+err_v4l2:
+ v4l2_device_unregister(&bdisp->v4l2_dev);
+err_clk:
+ if (!IS_ERR(bdisp->clock))
+ clk_unprepare(bdisp->clock);
+
+ return ret;
+}
+
+static const struct of_device_id bdisp_match_types[] = {
+ {
+ .compatible = "st,stih407-bdisp",
+ },
+ { /* end node */ }
+};
+
+MODULE_DEVICE_TABLE(of, bdisp_match_types);
+
+static struct platform_driver bdisp_driver = {
+ .probe = bdisp_probe,
+ .remove = bdisp_remove,
+ .driver = {
+ .name = BDISP_NAME,
+ .of_match_table = bdisp_match_types,
+ .pm = &bdisp_pm_ops,
+ },
+};
+
+module_platform_driver(bdisp_driver);
+
+MODULE_DESCRIPTION("2D blitter for STMicroelectronics SoC");
+MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff