This is a bridge driver for blackfin diplay device.
It can work with ppi or eppi interface. DV timings
are supported.
Signed-off-by: Scott Jiang <scott.jiang.li...@gmail.com>
---
drivers/media/platform/blackfin/Kconfig | 15 +-
drivers/media/platform/blackfin/Makefile | 1 +
drivers/media/platform/blackfin/bfin_display.c | 1151 ++++++++++++++++++++++++
include/media/blackfin/bfin_display.h | 38 +
4 files changed, 1203 insertions(+), 2 deletions(-)
create mode 100644 drivers/media/platform/blackfin/bfin_display.c
create mode 100644 include/media/blackfin/bfin_display.h
diff --git a/drivers/media/platform/blackfin/Kconfig
b/drivers/media/platform/blackfin/Kconfig
index cc23997..8a8fd75 100644
--- a/drivers/media/platform/blackfin/Kconfig
+++ b/drivers/media/platform/blackfin/Kconfig
@@ -9,7 +9,18 @@ config VIDEO_BLACKFIN_CAPTURE
To compile this driver as a module, choose M here: the
module will be called bfin_capture.
+config VIDEO_BLACKFIN_DISPLAY
+ tristate "Blackfin Video Display Driver"
+ depends on VIDEO_V4L2 && BLACKFIN && I2C
+ select VIDEOBUF2_DMA_CONTIG
+ help
+ V4L2 bridge driver for Blackfin video display device.
+ Choose PPI or EPPI as its interface.
+
+ To compile this driver as a module, choose M here: the
+ module will be called bfin_display.
+
config VIDEO_BLACKFIN_PPI
tristate
- depends on VIDEO_BLACKFIN_CAPTURE
- default VIDEO_BLACKFIN_CAPTURE
+ depends on VIDEO_BLACKFIN_CAPTURE || VIDEO_BLACKFIN_DISPLAY
+ default VIDEO_BLACKFIN_CAPTURE || VIDEO_BLACKFIN_DISPLAY
diff --git a/drivers/media/platform/blackfin/Makefile
b/drivers/media/platform/blackfin/Makefile
index 30421bc..015c8f0 100644
--- a/drivers/media/platform/blackfin/Makefile
+++ b/drivers/media/platform/blackfin/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_VIDEO_BLACKFIN_CAPTURE) += bfin_capture.o
+obj-$(CONFIG_VIDEO_BLACKFIN_DISPLAY) += bfin_display.o
obj-$(CONFIG_VIDEO_BLACKFIN_PPI) += ppi.o
diff --git a/drivers/media/platform/blackfin/bfin_display.c
b/drivers/media/platform/blackfin/bfin_display.c
new file mode 100644
index 0000000..d971d7b
--- /dev/null
+++ b/drivers/media/platform/blackfin/bfin_display.c
@@ -0,0 +1,1151 @@
+/*
+ * Analog Devices video display driver
+ *
+ * Copyright (c) 2011 Analog Devices Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/types.h>
+
+#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include <asm/dma.h>
+
+#include <media/blackfin/bfin_display.h>
+#include <media/blackfin/ppi.h>
+
+#define DISPLAY_DRV_NAME "bfin_display"
+#define DISP_MIN_NUM_BUF 2
+
+struct disp_format {
+ char *desc;
+ u32 pixelformat;
+ enum v4l2_mbus_pixelcode mbus_code;
+ int bpp; /* bits per pixel */
+ int dlen; /* data length for ppi in bits */
+};
+
+struct disp_buffer {
+ struct vb2_buffer vb;
+ struct list_head list;
+};
+
+struct disp_device {
+ /* capture device instance */
+ struct v4l2_device v4l2_dev;
+ /* v4l2 control handler */
+ struct v4l2_ctrl_handler ctrl_handler;
+ /* device node data */
+ struct video_device *video_dev;
+ /* sub device instance */
+ struct v4l2_subdev *sd;
+ /* capture config */
+ struct bfin_display_config *cfg;
+ /* ppi interface */
+ struct ppi_if *ppi;
+ /* current output */
+ unsigned int cur_output;
+ /* current selected standard */
+ v4l2_std_id std;
+ /* current selected dv_timings */
+ struct v4l2_dv_timings dv_timings;
+ /* used to store pixel format */
+ struct v4l2_pix_format fmt;
+ /* bits per pixel*/
+ int bpp;
+ /* data length for ppi in bits */
+ int dlen;
+ /* used to store encoder supported format */
+ struct disp_format *enc_formats;
+ /* number of encoder formats array */
+ int num_enc_formats;
+ /* pointing to current video buffer */
+ struct disp_buffer *cur_frm;
+ /* buffer queue used in videobuf2 */
+ struct vb2_queue buffer_queue;
+ /* allocator-specific contexts for each plane */
+ struct vb2_alloc_ctx *alloc_ctx;
+ /* queue of filled frames */
+ struct list_head dma_queue;
+ /* used in videobuf2 callback */
+ spinlock_t lock;
+ /* used to access display device */
+ struct mutex mutex;
+};
+
+struct disp_fh {
+ struct v4l2_fh fh;
+ /* indicates whether this file handle is doing IO */
+ bool io_allowed;
+};
+
+static const struct disp_format disp_formats[] = {
+ {
+ .desc = "YCbCr 4:2:2 Interleaved UYVY 8bits",
+ .pixelformat = V4L2_PIX_FMT_UYVY,
+ .mbus_code = V4L2_MBUS_FMT_UYVY8_2X8,
+ .bpp = 16,
+ .dlen = 8,
+ },
+ {
+ .desc = "YCbCr 4:2:2 Interleaved YUYV 8bits",
+ .pixelformat = V4L2_PIX_FMT_YUYV,
+ .mbus_code = V4L2_MBUS_FMT_YUYV8_2X8,
+ .bpp = 16,
+ .dlen = 8,
+ },
+ {
+ .desc = "YCbCr 4:2:2 Interleaved UYVY 16bits",
+ .pixelformat = V4L2_PIX_FMT_UYVY,
+ .mbus_code = V4L2_MBUS_FMT_UYVY8_1X16,
+ .bpp = 16,
+ .dlen = 16,
+ },
+ {
+ .desc = "RGB 565",
+ .pixelformat = V4L2_PIX_FMT_RGB565,
+ .mbus_code = V4L2_MBUS_FMT_RGB565_2X8_LE,
+ .bpp = 16,
+ .dlen = 8,
+ },
+ {
+ .desc = "RGB 444",
+ .pixelformat = V4L2_PIX_FMT_RGB444,
+ .mbus_code = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE,
+ .bpp = 16,
+ .dlen = 8,
+ },
+
+};
+#define DISP_MAX_FMTS ARRAY_SIZE(disp_formats)
+
+static irqreturn_t disp_isr(int irq, void *dev_id);
+
+static struct disp_buffer *to_disp_vb(struct vb2_buffer *vb)
+{
+ return container_of(vb, struct disp_buffer, vb);
+}
+
+static int disp_init_encoder_formats(struct disp_device *disp)
+{
+ enum v4l2_mbus_pixelcode code;
+ struct disp_format *df;
+ unsigned int num_formats = 0;
+ int i, j;
+
+ while (!v4l2_subdev_call(disp->sd, video,
+ enum_mbus_fmt, num_formats, &code))
+ num_formats++;
+ if (!num_formats)
+ return -ENXIO;
+
+ df = kzalloc(num_formats * sizeof(*df), GFP_KERNEL);
+ if (!df)
+ return -ENOMEM;
+
+ for (i = 0; i < num_formats; i++) {
+ v4l2_subdev_call(disp->sd, video,
+ enum_mbus_fmt, i, &code);
+ for (j = 0; j < DISP_MAX_FMTS; j++)
+ if (code == disp_formats[j].mbus_code)
+ break;
+ if (j == DISP_MAX_FMTS) {
+ /* we don't allow this encoder working with our bridge
*/
+ kfree(df);
+ return -EINVAL;
+ }
+ df[i] = disp_formats[j];
+ }
+ disp->enc_formats = df;
+ disp->num_enc_formats = num_formats;
+ return 0;
+}
+
+static void disp_free_encoder_formats(struct disp_device *disp)
+{
+ disp->num_enc_formats = 0;
+ kfree(disp->enc_formats);
+ disp->enc_formats = NULL;
+}
+
+static int disp_open(struct file *file)
+{
+ struct disp_device *disp = video_drvdata(file);
+ struct video_device *vfd = disp->video_dev;
+ struct disp_fh *disp_fh;
+
+ if (!disp->sd) {
+ v4l2_err(&disp->v4l2_dev, "No sub device registered\n");
+ return -ENODEV;
+ }
+
+ disp_fh = kzalloc(sizeof(*disp_fh), GFP_KERNEL);
+ if (!disp_fh) {
+ v4l2_err(&disp->v4l2_dev,
+ "unable to allocate memory for file handle object\n");
+ return -ENOMEM;
+ }
+
+ v4l2_fh_init(&disp_fh->fh, vfd);
+
+ /* store pointer to v4l2_fh in private_data member of file */
+ file->private_data = &disp_fh->fh;
+ v4l2_fh_add(&disp_fh->fh);
+ disp_fh->io_allowed = false;
+ return 0;
+}
+
+static int disp_release(struct file *file)
+{
+ struct disp_device *disp = video_drvdata(file);
+ struct v4l2_fh *fh = file->private_data;
+ struct disp_fh *disp_fh = container_of(fh, struct disp_fh, fh);
+
+ /* if this instance is doing IO */
+ if (disp_fh->io_allowed)
+ vb2_queue_release(&disp->buffer_queue);
+
+ file->private_data = NULL;
+ v4l2_fh_del(&disp_fh->fh);
+ v4l2_fh_exit(&disp_fh->fh);
+ kfree(disp_fh);
+ return 0;
+}
+
+static int disp_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct disp_device *disp = video_drvdata(file);
+ int ret;
+
+ if (mutex_lock_interruptible(&disp->mutex))
+ return -ERESTARTSYS;
+ ret = vb2_mmap(&disp->buffer_queue, vma);
+ mutex_unlock(&disp->mutex);
+ return ret;
+}
+
+#ifndef CONFIG_MMU
+static unsigned long disp_get_unmapped_area(struct file *file,
+ unsigned long addr,
+ unsigned long len,
+ unsigned long pgoff,
+ unsigned long flags)
+{
+ struct disp_device *disp = video_drvdata(file);
+ int ret;
+
+ if (mutex_lock_interruptible(&disp->mutex))
+ return -ERESTARTSYS;
+ ret = vb2_get_unmapped_area(&disp->buffer_queue,
+ addr,
+ len,
+ pgoff,
+ flags);
+ mutex_unlock(&disp->mutex);
+ return ret;
+}
+#endif
+
+static unsigned int disp_poll(struct file *file, poll_table *wait)
+{
+ struct disp_device *disp = video_drvdata(file);
+ int ret;
+
+ mutex_lock(&disp->mutex);
+ ret = vb2_poll(&disp->buffer_queue, file, wait);
+ mutex_unlock(&disp->mutex);
+ return ret;
+}
+
+static int disp_queue_setup(struct vb2_queue *vq,
+ const struct v4l2_format *fmt,
+ unsigned int *nbuffers, unsigned int *nplanes,
+ unsigned int sizes[], void *alloc_ctxs[])
+{
+ struct disp_device *disp = vb2_get_drv_priv(vq);
+
+ if (*nbuffers < DISP_MIN_NUM_BUF)
+ *nbuffers = DISP_MIN_NUM_BUF;
+
+ *nplanes = 1;
+ sizes[0] = disp->fmt.sizeimage;
+ alloc_ctxs[0] = disp->alloc_ctx;
+
+ return 0;
+}
+
+static int disp_buffer_init(struct vb2_buffer *vb)
+{
+ struct disp_buffer *buf = to_disp_vb(vb);
+
+ INIT_LIST_HEAD(&buf->list);
+ return 0;
+}
+
+static int disp_buffer_prepare(struct vb2_buffer *vb)
+{
+ struct disp_device *disp = vb2_get_drv_priv(vb->vb2_queue);
+ struct disp_buffer *buf = to_disp_vb(vb);
+ unsigned long size;
+
+ size = disp->fmt.sizeimage;
+ if (vb2_plane_size(vb, 0) < size) {
+ v4l2_err(&disp->v4l2_dev, "buffer too small (%lu < %lu)\n",
+ vb2_plane_size(vb, 0), size);
+ return -EINVAL;
+ }
+ vb2_set_plane_payload(&buf->vb, 0, size);
+
+ return 0;
+}
+
+static void disp_buffer_queue(struct vb2_buffer *vb)
+{
+ struct disp_device *disp = vb2_get_drv_priv(vb->vb2_queue);
+ struct disp_buffer *buf = to_disp_vb(vb);
+ unsigned long flags;
+
+ spin_lock_irqsave(&disp->lock, flags);
+ list_add_tail(&buf->list, &disp->dma_queue);
+ spin_unlock_irqrestore(&disp->lock, flags);
+}
+
+static void disp_buffer_cleanup(struct vb2_buffer *vb)
+{
+ struct disp_device *disp = vb2_get_drv_priv(vb->vb2_queue);
+ struct disp_buffer *buf = to_disp_vb(vb);
+ unsigned long flags;
+
+ spin_lock_irqsave(&disp->lock, flags);
+ list_del_init(&buf->list);
+ spin_unlock_irqrestore(&disp->lock, flags);
+}
+
+static void disp_lock(struct vb2_queue *vq)
+{
+ struct disp_device *disp = vb2_get_drv_priv(vq);
+ mutex_lock(&disp->mutex);
+}
+
+static void disp_unlock(struct vb2_queue *vq)
+{
+ struct disp_device *disp = vb2_get_drv_priv(vq);
+ mutex_unlock(&disp->mutex);
+}
+
+static int disp_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct disp_device *disp = vb2_get_drv_priv(vq);
+ struct ppi_if *ppi = disp->ppi;
+ struct ppi_params params;
+ int ret;
+
+ /* enable streamon on the sub device */
+ ret = v4l2_subdev_call(disp->sd, video, s_stream, 1);
+ if (ret && (ret != -ENOIOCTLCMD)) {
+ v4l2_err(&disp->v4l2_dev, "stream on failed in subdev\n");
+ return ret;
+ }
+
+ /* set ppi params */
+ params.width = disp->fmt.width;
+ params.height = disp->fmt.height;
+ params.bpp = disp->bpp;
+ params.dlen = disp->dlen;
+ params.ppi_control = disp->cfg->ppi_control;
+ params.int_mask = disp->cfg->int_mask;
+ if (disp->cfg->outputs[disp->cur_output].capabilities
+ & V4L2_IN_CAP_CUSTOM_TIMINGS) {
+ struct v4l2_bt_timings *bt = &disp->dv_timings.bt;
+
+ params.hdelay = bt->hsync + bt->hbackporch;
+ params.vdelay = bt->vsync + bt->vbackporch;
+ params.line = bt->hfrontporch + bt->hsync
+ + bt->hbackporch + bt->width;
+ params.frame = bt->vfrontporch + bt->vsync
+ + bt->vbackporch + bt->height;
+ if (bt->interlaced)
+ params.frame += bt->il_vfrontporch + bt->il_vsync
+ + bt->il_vbackporch;
+ params.hsync = bt->hsync;
+ params.vsync = bt->vsync;
+ } else if (disp->cfg->outputs[disp->cur_output].capabilities
+ & V4L2_IN_CAP_STD) {
+ params.hdelay = 0;
+ params.vdelay = 0;
+ if (disp->std & V4L2_STD_525_60) {
+ params.line = 858;
+ params.frame = 525;
+ } else {
+ params.line = 864;
+ params.frame = 625;
+ }
+ } else {
+ params.hdelay = 0;
+ params.vdelay = 0;
+ params.line = params.width + disp->cfg->blank_pixels;
+ params.frame = params.height;
+ }
+ ret = ppi->ops->set_params(ppi, ¶ms);
+ if (ret < 0) {
+ v4l2_err(&disp->v4l2_dev,
+ "Error in setting ppi params\n");
+ return ret;
+ }
+
+ /* attach ppi DMA irq handler */
+ ret = ppi->ops->attach_irq(ppi, disp_isr);
+ if (ret < 0) {
+ v4l2_err(&disp->v4l2_dev,
+ "Error in attaching interrupt handler\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int disp_stop_streaming(struct vb2_queue *vq)
+{
+ struct disp_device *disp = vb2_get_drv_priv(vq);
+ struct ppi_if *ppi = disp->ppi;
+ unsigned long flags;
+ int ret;
+
+ if (!vb2_is_streaming(vq))
+ return 0;
+
+ ppi->ops->stop(ppi);
+ ppi->ops->detach_irq(ppi);
+ ret = v4l2_subdev_call(disp->sd, video, s_stream, 0);
+ if (ret && (ret != -ENOIOCTLCMD))
+ v4l2_err(&disp->v4l2_dev,
+ "stream off failed in subdev\n");
+
+ spin_lock_irqsave(&disp->lock, flags);
+ /* release all active buffers */
+ while (!list_empty(&disp->dma_queue)) {
+ disp->cur_frm = list_entry(disp->dma_queue.next,
+ struct disp_buffer, list);
+ list_del(&disp->cur_frm->list);
+ vb2_buffer_done(&disp->cur_frm->vb, VB2_BUF_STATE_ERROR);
+ }
+ spin_unlock_irqrestore(&disp->lock, flags);
+ return 0;
+}
+
+static struct vb2_ops disp_video_qops = {
+ .queue_setup = disp_queue_setup,
+ .buf_init = disp_buffer_init,
+ .buf_prepare = disp_buffer_prepare,
+ .buf_cleanup = disp_buffer_cleanup,
+ .buf_queue = disp_buffer_queue,
+ .wait_prepare = disp_unlock,
+ .wait_finish = disp_lock,
+ .start_streaming = disp_start_streaming,
+ .stop_streaming = disp_stop_streaming,
+};
+
+static int disp_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *req_buf)
+{
+ struct disp_device *disp = video_drvdata(file);
+ struct vb2_queue *vq = &disp->buffer_queue;
+ struct v4l2_fh *fh = file->private_data;
+ struct disp_fh *disp_fh = container_of(fh, struct disp_fh, fh);
+
+ if (vb2_is_busy(vq))
+ return -EBUSY;
+
+ disp_fh->io_allowed = true;
+
+ return vb2_reqbufs(vq, req_buf);
+}
+
+static int disp_querybuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct disp_device *disp = video_drvdata(file);
+
+ return vb2_querybuf(&disp->buffer_queue, buf);
+}
+
+static int disp_qbuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct disp_device *disp = video_drvdata(file);
+ struct v4l2_fh *fh = file->private_data;
+ struct disp_fh *disp_fh = container_of(fh, struct disp_fh, fh);
+
+ if (!disp_fh->io_allowed)
+ return -EBUSY;
+
+ return vb2_qbuf(&disp->buffer_queue, buf);
+}
+
+static int disp_dqbuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct disp_device *disp = video_drvdata(file);
+ struct v4l2_fh *fh = file->private_data;
+ struct disp_fh *disp_fh = container_of(fh, struct disp_fh, fh);
+
+ if (!disp_fh->io_allowed)
+ return -EBUSY;
+
+ return vb2_dqbuf(&disp->buffer_queue,
+ buf, file->f_flags & O_NONBLOCK);
+}
+
+static irqreturn_t disp_isr(int irq, void *dev_id)
+{
+ struct ppi_if *ppi = dev_id;
+ struct disp_device *disp = ppi->priv;
+ struct timeval timevalue;
+ struct vb2_buffer *vb = &disp->cur_frm->vb;
+ dma_addr_t addr;
+
+ spin_lock(&disp->lock);
+
+ if (!list_empty(&disp->dma_queue)) {
+ do_gettimeofday(&timevalue);
+ vb->v4l2_buf.timestamp = timevalue;
+ vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+ disp->cur_frm = list_entry(disp->dma_queue.next,
+ struct disp_buffer, list);
+ list_del(&disp->cur_frm->list);
+ }
+
+ clear_dma_irqstat(ppi->info->dma_ch);
+
+ addr = vb2_dma_contig_plane_dma_addr(&disp->cur_frm->vb, 0);
+ ppi->ops->update_addr(ppi, (unsigned long)addr);
+ ppi->ops->start(ppi);
+
+ spin_unlock(&disp->lock);
+
+ return IRQ_HANDLED;
+}
+
+static int disp_streamon(struct file *file, void *priv,
+ enum v4l2_buf_type buf_type)
+{
+ struct disp_device *disp = video_drvdata(file);
+ struct disp_fh *fh = file->private_data;
+ struct ppi_if *ppi = disp->ppi;
+ dma_addr_t addr;
+ int ret;
+
+ if (!fh->io_allowed)
+ return -EBUSY;
+
+ /* call streamon to start streaming in videobuf */
+ ret = vb2_streamon(&disp->buffer_queue, buf_type);
+ if (ret)
+ return ret;
+
+ /* if dma queue is empty, return error */
+ if (list_empty(&disp->dma_queue)) {
+ v4l2_err(&disp->v4l2_dev, "dma queue is empty\n");
+ ret = -EINVAL;
+ goto err;
+ }
+
+ /* get the next frame from the dma queue */
+ disp->cur_frm = list_entry(disp->dma_queue.next,
+ struct disp_buffer, list);
+ /* remove buffer from the dma queue */
+ list_del(&disp->cur_frm->list);
+ addr = vb2_dma_contig_plane_dma_addr(&disp->cur_frm->vb, 0);
+ /* update DMA address */
+ ppi->ops->update_addr(ppi, (unsigned long)addr);
+ /* enable ppi */
+ ppi->ops->start(ppi);
+
+ return 0;
+err:
+ vb2_streamoff(&disp->buffer_queue, buf_type);
+ return ret;
+}
+
+static int disp_streamoff(struct file *file, void *priv,
+ enum v4l2_buf_type buf_type)
+{
+ struct disp_device *disp = video_drvdata(file);
+ struct disp_fh *fh = file->private_data;
+
+ if (!fh->io_allowed)
+ return -EBUSY;
+
+ return vb2_streamoff(&disp->buffer_queue, buf_type);
+}
+
+static int disp_g_std(struct file *file, void *priv, v4l2_std_id *std)
+{
+ struct disp_device *disp = video_drvdata(file);
+
+ *std = disp->std;
+ return 0;
+}
+
+static int disp_s_std(struct file *file, void *priv, v4l2_std_id *std)
+{
+ struct disp_device *disp = video_drvdata(file);
+ int ret;
+
+ if (vb2_is_busy(&disp->buffer_queue))
+ return -EBUSY;
+
+ ret = v4l2_subdev_call(disp->sd, video, s_std_output, *std);
+ if (ret < 0)
+ return ret;
+
+ disp->std = *std;
+ return 0;
+}
+
+static int disp_g_dv_timings(struct file *file, void *priv,
+ struct v4l2_dv_timings *timings)
+{
+ struct disp_device *disp = video_drvdata(file);
+ int ret;
+
+ ret = v4l2_subdev_call(disp->sd, video,
+ g_dv_timings, timings);
+ if (ret < 0)
+ return ret;
+
+ disp->dv_timings = *timings;
+ return 0;
+}
+
+static int disp_s_dv_timings(struct file *file, void *priv,
+ struct v4l2_dv_timings *timings)
+{
+ struct disp_device *disp = video_drvdata(file);
+ int ret;
+ if (vb2_is_busy(&disp->buffer_queue))
+ return -EBUSY;
+
+ ret = v4l2_subdev_call(disp->sd, video, s_dv_timings, timings);
+ if (ret < 0)
+ return ret;
+
+ disp->dv_timings = *timings;
+ return 0;
+}
+
+static int disp_enum_output(struct file *file, void *priv,
+ struct v4l2_output *output)
+{
+ struct disp_device *disp = video_drvdata(file);
+ struct bfin_display_config *config = disp->cfg;
+
+ if (output->index >= config->num_outputs)
+ return -EINVAL;
+
+ *output = config->outputs[output->index];
+ return 0;
+}
+
+static int disp_g_output(struct file *file, void *priv, unsigned int *index)
+{
+ struct disp_device *disp = video_drvdata(file);
+
+ *index = disp->cur_output;
+ return 0;
+}
+
+static int disp_s_output(struct file *file, void *priv, unsigned int index)
+{
+ struct disp_device *disp = video_drvdata(file);
+ struct bfin_display_config *config = disp->cfg;
+ struct disp_route *route;
+ int ret;
+
+ if (vb2_is_busy(&disp->buffer_queue))
+ return -EBUSY;
+
+ if (index >= config->num_outputs)
+ return -EINVAL;
+
+ route = &config->routes[index];
+ ret = v4l2_subdev_call(disp->sd, video, s_routing,
+ 0, route->output, route->config);
+ if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
+ v4l2_err(&disp->v4l2_dev, "Failed to set output\n");
+ return ret;
+ }
+ disp->cur_output = index;
+ /* if this route has specific config, update ppi control */
+ if (route->ppi_control)
+ config->ppi_control = route->ppi_control;
+ return 0;
+}
+
+static int disp_try_format(struct disp_device *disp,
+ struct v4l2_pix_format *pixfmt,
+ struct disp_format *disp_fmt)
+{
+ struct disp_format *df = disp->enc_formats;
+ struct disp_format *fmt = NULL;
+ struct v4l2_mbus_framefmt mbus_fmt;
+ int ret, i;
+
+ for (i = 0; i < disp->num_enc_formats; i++) {
+ fmt = &df[i];
+ if (pixfmt->pixelformat == fmt->pixelformat)
+ break;
+ }
+ if (i == disp->num_enc_formats)
+ fmt = &df[0];
+
+ v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
+ ret = v4l2_subdev_call(disp->sd, video,
+ try_mbus_fmt, &mbus_fmt);
+ if (ret < 0)
+ return ret;
+ v4l2_fill_pix_format(pixfmt, &mbus_fmt);
+ if (disp_fmt) {
+ for (i = 0; i < disp->num_enc_formats; i++) {
+ fmt = &df[i];
+ if (mbus_fmt.code == fmt->mbus_code)
+ break;
+ }
+ *disp_fmt = *fmt;
+ }
+ pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
+ pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
+ return 0;
+}
+
+static int disp_enum_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_fmtdesc *fmt)
+{
+ struct disp_device *disp = video_drvdata(file);
+ struct disp_format *df = disp->enc_formats;
+
+ if (fmt->index >= disp->num_enc_formats)
+ return -EINVAL;
+
+ fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ strlcpy(fmt->description,
+ df[fmt->index].desc,
+ sizeof(fmt->description));
+ fmt->pixelformat = df[fmt->index].pixelformat;
+ return 0;
+}
+
+static int disp_try_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct disp_device *disp = video_drvdata(file);
+ struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
+
+ return disp_try_format(disp, pixfmt, NULL);
+}
+
+static int disp_g_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct disp_device *disp = video_drvdata(file);
+
+ fmt->fmt.pix = disp->fmt;
+ return 0;
+}
+
+static int disp_s_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct disp_device *disp = video_drvdata(file);
+ struct v4l2_mbus_framefmt mbus_fmt;
+ struct disp_format disp_fmt;
+ struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
+ int ret;
+
+ if (vb2_is_busy(&disp->buffer_queue))
+ return -EBUSY;
+
+ /* see if format works */
+ ret = disp_try_format(disp, pixfmt, &disp_fmt);
+ if (ret < 0)
+ return ret;
+
+ v4l2_fill_mbus_format(&mbus_fmt, pixfmt, disp_fmt.mbus_code);
+ ret = v4l2_subdev_call(disp->sd, video, s_mbus_fmt, &mbus_fmt);
+ if (ret < 0)
+ return ret;
+ disp->fmt = *pixfmt;
+ disp->bpp = disp_fmt.bpp;
+ disp->dlen = disp_fmt.dlen;
+ return 0;
+}
+
+static int disp_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct disp_device *disp = video_drvdata(file);
+
+ cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
+ strlcpy(cap->driver, DISPLAY_DRV_NAME, sizeof(cap->driver));
+ strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
+ strlcpy(cap->card, disp->cfg->card_name, sizeof(cap->card));
+ return 0;
+}
+
+static int disp_g_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *a)
+{
+ struct disp_device *disp = video_drvdata(file);
+
+ return v4l2_subdev_call(disp->sd, video, g_parm, a);
+}
+
+static int disp_s_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *a)
+{
+ struct disp_device *disp = video_drvdata(file);
+
+ return v4l2_subdev_call(disp->sd, video, s_parm, a);
+}
+
+static int disp_g_chip_ident(struct file *file, void *priv,
+ struct v4l2_dbg_chip_ident *chip)
+{
+ struct disp_device *disp = video_drvdata(file);
+
+ chip->ident = V4L2_IDENT_NONE;
+ chip->revision = 0;
+ if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
+ chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
+ return -EINVAL;
+
+ return v4l2_subdev_call(disp->sd, core,
+ g_chip_ident, chip);
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int disp_dbg_g_register(struct file *file, void *priv,
+ struct v4l2_dbg_register *reg)
+{
+ struct disp_device *disp = video_drvdata(file);
+
+ return v4l2_subdev_call(disp->sd, core,
+ g_register, reg);
+}
+
+static int disp_dbg_s_register(struct file *file, void *priv,
+ struct v4l2_dbg_register *reg)
+{
+ struct disp_device *disp = video_drvdata(file);
+
+ return v4l2_subdev_call(disp->sd, core,
+ s_register, reg);
+}
+#endif
+
+static int disp_log_status(struct file *file, void *priv)
+{
+ struct disp_device *disp = video_drvdata(file);
+ /* status for sub devices */
+ v4l2_device_call_all(&disp->v4l2_dev, 0, core, log_status);
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops disp_ioctl_ops = {
+ .vidioc_querycap = disp_querycap,
+ .vidioc_g_fmt_vid_out = disp_g_fmt_vid_out,
+ .vidioc_enum_fmt_vid_out = disp_enum_fmt_vid_out,
+ .vidioc_s_fmt_vid_out = disp_s_fmt_vid_out,
+ .vidioc_try_fmt_vid_out = disp_try_fmt_vid_out,
+ .vidioc_enum_output = disp_enum_output,
+ .vidioc_g_output = disp_g_output,
+ .vidioc_s_output = disp_s_output,
+ .vidioc_s_std = disp_s_std,
+ .vidioc_g_std = disp_g_std,
+ .vidioc_s_dv_timings = disp_s_dv_timings,
+ .vidioc_g_dv_timings = disp_g_dv_timings,
+ .vidioc_reqbufs = disp_reqbufs,
+ .vidioc_querybuf = disp_querybuf,
+ .vidioc_qbuf = disp_qbuf,
+ .vidioc_dqbuf = disp_dqbuf,
+ .vidioc_streamon = disp_streamon,
+ .vidioc_streamoff = disp_streamoff,
+ .vidioc_g_parm = disp_g_parm,
+ .vidioc_s_parm = disp_s_parm,
+ .vidioc_g_chip_ident = disp_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .vidioc_g_register = disp_dbg_g_register,
+ .vidioc_s_register = disp_dbg_s_register,
+#endif
+ .vidioc_log_status = disp_log_status,
+};
+
+static struct v4l2_file_operations disp_fops = {
+ .owner = THIS_MODULE,
+ .open = disp_open,
+ .release = disp_release,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = disp_mmap,
+#ifndef CONFIG_MMU
+ .get_unmapped_area = disp_get_unmapped_area,
+#endif
+ .poll = disp_poll
+};
+
+static int disp_probe(struct platform_device *pdev)
+{
+ struct disp_device *disp;
+ struct video_device *vfd;
+ struct i2c_adapter *i2c_adap;
+ struct bfin_display_config *config;
+ struct vb2_queue *q;
+ struct disp_route *route;
+ int ret;
+
+ config = pdev->dev.platform_data;
+ if (!config) {
+ v4l2_err(pdev->dev.driver, "Unable to get board config\n");
+ return -ENODEV;
+ }
+
+ disp = kzalloc(sizeof(*disp), GFP_KERNEL);
+ if (!disp) {
+ v4l2_err(pdev->dev.driver, "Unable to alloc disp\n");
+ return -ENOMEM;
+ }
+
+ disp->cfg = config;
+
+ disp->ppi = ppi_create_instance(config->ppi_info);
+ if (!disp->ppi) {
+ v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
+ ret = -ENODEV;
+ goto err_free_dev;
+ }
+ disp->ppi->priv = disp;
+
+ disp->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
+ if (IS_ERR(disp->alloc_ctx)) {
+ ret = PTR_ERR(disp->alloc_ctx);
+ goto err_free_ppi;
+ }
+
+ vfd = video_device_alloc();
+ if (!vfd) {
+ ret = -ENOMEM;
+ v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
+ goto err_cleanup_ctx;
+ }
+
+ /* initialize field of video device */
+ vfd->release = video_device_release;
+ vfd->fops = &disp_fops;
+ vfd->ioctl_ops = &disp_ioctl_ops;
+ vfd->tvnorms = 0;
+ vfd->v4l2_dev = &disp->v4l2_dev;
+ vfd->vfl_dir = VFL_DIR_TX;
+ set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
+ strncpy(vfd->name, DISPLAY_DRV_NAME, sizeof(vfd->name));
+ disp->video_dev = vfd;
+
+ ret = v4l2_device_register(&pdev->dev, &disp->v4l2_dev);
+ if (ret) {
+ v4l2_err(pdev->dev.driver,
+ "Unable to register v4l2 device\n");
+ goto err_release_vdev;
+ }
+ v4l2_info(&disp->v4l2_dev, "v4l2 device registered\n");
+
+ disp->v4l2_dev.ctrl_handler = &disp->ctrl_handler;
+ ret = v4l2_ctrl_handler_init(&disp->ctrl_handler, 0);
+ if (ret) {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to init control handler\n");
+ goto err_unreg_v4l2;
+ }
+
+ spin_lock_init(&disp->lock);
+ /* initialize queue */
+ q = &disp->buffer_queue;
+ q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ q->io_modes = VB2_MMAP;
+ q->drv_priv = disp;
+ q->buf_struct_size = sizeof(struct disp_buffer);
+ q->ops = &disp_video_qops;
+ q->mem_ops = &vb2_dma_contig_memops;
+
+ ret = vb2_queue_init(q);
+ if (ret) {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to init videobuf2 queue\n");
+ goto err_free_handler;
+ }
+
+ mutex_init(&disp->mutex);
+
+ /* init video dma queues */
+ INIT_LIST_HEAD(&disp->dma_queue);
+
+ vfd->lock = &disp->mutex;
+
+ /* register video device */
+ ret = video_register_device(disp->video_dev, VFL_TYPE_GRABBER, -1);
+ if (ret) {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to register video device\n");
+ goto err_free_handler;
+ }
+ video_set_drvdata(disp->video_dev, disp);
+ v4l2_info(&disp->v4l2_dev, "video device registered as: %s\n",
+ video_device_node_name(vfd));
+
+ /* load up the subdevice */
+ i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
+ if (!i2c_adap) {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to find i2c adapter\n");
+ goto err_unreg_vdev;
+
+ }
+ disp->sd = v4l2_i2c_new_subdev_board(&disp->v4l2_dev,
+ i2c_adap,
+ &config->board_info,
+ NULL);
+ if (disp->sd) {
+ int i;
+ if (!config->num_outputs) {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to work without output\n");
+ goto err_unreg_vdev;
+ }
+
+ /* update tvnorms from the sub devices */
+ for (i = 0; i < config->num_outputs; i++)
+ vfd->tvnorms |= config->outputs[i].std;
+ } else {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to register sub device\n");
+ goto err_unreg_vdev;
+ }
+
+ v4l2_info(&disp->v4l2_dev, "v4l2 sub device registered\n");
+
+ /*
+ * explicitly set output, otherwise some boards
+ * may not work at the state as we expected
+ */
+ route = &config->routes[0];
+ ret = v4l2_subdev_call(disp->sd, video, s_routing,
+ route->output, route->output, 0);
+ if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
+ v4l2_err(&disp->v4l2_dev, "Failed to set output\n");
+ goto err_unreg_vdev;
+ }
+ disp->cur_output = 0;
+ /* if this route has specific config, update ppi control */
+ if (route->ppi_control)
+ config->ppi_control = route->ppi_control;
+
+ /* now we can probe the default state */
+ if (config->outputs[0].capabilities & V4L2_IN_CAP_STD) {
+ v4l2_std_id std;
+ ret = v4l2_subdev_call(disp->sd, core, g_std, &std);
+ if (ret) {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to get std\n");
+ goto err_unreg_vdev;
+ }
+ disp->std = std;
+ }
+ if (config->outputs[0].capabilities & V4L2_IN_CAP_CUSTOM_TIMINGS) {
+ struct v4l2_dv_timings dv_timings;
+ ret = v4l2_subdev_call(disp->sd, video,
+ g_dv_timings, &dv_timings);
+ if (ret) {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to get dv timings\n");
+ goto err_unreg_vdev;
+ }
+ disp->dv_timings = dv_timings;
+ }
+ ret = disp_init_encoder_formats(disp);
+ if (ret) {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to create encoder formats table\n");
+ goto err_unreg_vdev;
+ }
+ return 0;
+err_unreg_vdev:
+ video_unregister_device(disp->video_dev);
+ disp->video_dev = NULL;
+err_free_handler:
+ v4l2_ctrl_handler_free(&disp->ctrl_handler);
+err_unreg_v4l2:
+ v4l2_device_unregister(&disp->v4l2_dev);
+err_release_vdev:
+ if (disp->video_dev)
+ video_device_release(disp->video_dev);
+err_cleanup_ctx:
+ vb2_dma_contig_cleanup_ctx(disp->alloc_ctx);
+err_free_ppi:
+ ppi_delete_instance(disp->ppi);
+err_free_dev:
+ kfree(disp);
+ return ret;
+}
+
+static int disp_remove(struct platform_device *pdev)
+{
+ struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
+ struct disp_device *disp = container_of(v4l2_dev,
+ struct disp_device, v4l2_dev);
+
+ disp_free_encoder_formats(disp);
+ video_unregister_device(disp->video_dev);
+ v4l2_ctrl_handler_free(&disp->ctrl_handler);
+ v4l2_device_unregister(v4l2_dev);
+ vb2_dma_contig_cleanup_ctx(disp->alloc_ctx);
+ ppi_delete_instance(disp->ppi);
+ kfree(disp);
+ return 0;
+}
+
+static struct platform_driver disp_driver = {
+ .driver = {
+ .name = DISPLAY_DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = disp_probe,
+ .remove = disp_remove,
+};
+module_platform_driver(disp_driver);
+
+MODULE_DESCRIPTION("Analog Devices blackfin video display driver");
+MODULE_AUTHOR("Scott Jiang <scott.jiang.li...@gmail.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/media/blackfin/bfin_display.h
b/include/media/blackfin/bfin_display.h
new file mode 100644
index 0000000..6eb1d5a
--- /dev/null
+++ b/include/media/blackfin/bfin_display.h
@@ -0,0 +1,38 @@
+#ifndef _BFIN_DISPLAY_H_
+#define _BFIN_DISPLAY_H_
+
+#include <linux/i2c.h>
+
+struct v4l2_output;
+struct ppi_info;
+
+struct disp_route {
+ u32 output;
+ u32 config;
+ u32 ppi_control;
+};
+
+struct bfin_display_config {
+ /* card name */
+ char *card_name;
+ /* outputs available at the sub device */
+ struct v4l2_output *outputs;
+ /* number of outputs supported */
+ int num_outputs;
+ /* routing information for each output */
+ struct disp_route *routes;
+ /* i2c bus adapter no */
+ int i2c_adapter_id;
+ /* i2c subdevice board info */
+ struct i2c_board_info board_info;
+ /* ppi board info */
+ const struct ppi_info *ppi_info;
+ /* ppi control */
+ u32 ppi_control;
+ /* ppi interrupt mask */
+ u32 int_mask;
+ /* horizontal blanking pixels */
+ int blank_pixels;
+};
+
+#endif
--
1.7.0.4
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