This is a V4L2 driver for Blackfin video display (E)PPI interface.
This module is common for BF537/BF561/BF548/BF609.
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 | 929 ++++++++++++++++++++++++
include/media/blackfin/bfin_display.h | 38 +
4 files changed, 981 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..10aa435 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 driver for Blackfin video display (E)PPI interface.
+ This module is common for BF537/BF561/BF548/BF609.
+
+ 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..d35cdcc
--- /dev/null
+++ b/drivers/media/platform/blackfin/bfin_display.c
@@ -0,0 +1,929 @@
+/*
+ * Analog Devices video display driver for (E)PPI interface
+ *
+ * Copyright (c) 2011 - 2013 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#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 bfin_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 bfin_disp_buffer {
+ struct vb2_buffer vb;
+ struct list_head list;
+};
+
+struct bfin_disp_device {
+ /* display 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;
+ /* display 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 bfin_disp_format *enc_formats;
+ /* number of encoder formats array */
+ int num_enc_formats;
+ /* pointing to current video buffer */
+ struct bfin_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 serialize all ioctls */
+ struct mutex mutex;
+ /* used to serialize all queuing ioctls */
+ struct mutex qlock;
+};
+
+static const struct bfin_disp_format bfin_disp_formats[] = {
+ {
+ .desc = "UYVY 4:2:2 8bits",
+ .pixelformat = V4L2_PIX_FMT_UYVY,
+ .mbus_code = V4L2_MBUS_FMT_UYVY8_2X8,
+ .bpp = 16,
+ .dlen = 8,
+ },
+ {
+ .desc = "YUYV 4:2:2 8bits",
+ .pixelformat = V4L2_PIX_FMT_YUYV,
+ .mbus_code = V4L2_MBUS_FMT_YUYV8_2X8,
+ .bpp = 16,
+ .dlen = 8,
+ },
+ {
+ .desc = "UYVY 4:2:2 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(bfin_disp_formats)
+
+static struct bfin_disp_buffer *to_bfin_disp_vb(struct vb2_buffer *vb)
+{
+ return container_of(vb, struct bfin_disp_buffer, vb);
+}
+
+static int bfin_disp_init_encoder_formats(struct bfin_disp_device *disp)
+{
+ enum v4l2_mbus_pixelcode code;
+ struct bfin_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 == bfin_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] = bfin_disp_formats[j];
+ }
+ disp->enc_formats = df;
+ disp->num_enc_formats = num_formats;
+ return 0;
+}
+
+static void bfin_disp_free_encoder_formats(struct bfin_disp_device *disp)
+{
+ disp->num_enc_formats = 0;
+ kfree(disp->enc_formats);
+ disp->enc_formats = NULL;
+}
+
+static int bfin_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 bfin_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 bfin_disp_buffer_init(struct vb2_buffer *vb)
+{
+ struct bfin_disp_buffer *buf = to_bfin_disp_vb(vb);
+
+ INIT_LIST_HEAD(&buf->list);
+ return 0;
+}
+
+static int bfin_disp_buffer_prepare(struct vb2_buffer *vb)
+{
+ struct bfin_disp_device *disp = vb2_get_drv_priv(vb->vb2_queue);
+ struct bfin_disp_buffer *buf = to_bfin_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 bfin_disp_buffer_queue(struct vb2_buffer *vb)
+{
+ struct bfin_disp_device *disp = vb2_get_drv_priv(vb->vb2_queue);
+ struct bfin_disp_buffer *buf = to_bfin_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 bfin_disp_buffer_cleanup(struct vb2_buffer *vb)
+{
+ struct bfin_disp_device *disp = vb2_get_drv_priv(vb->vb2_queue);
+ struct bfin_disp_buffer *buf = to_bfin_disp_vb(vb);
+ unsigned long flags;
+
+ spin_lock_irqsave(&disp->lock, flags);
+ list_del_init(&buf->list);
+ spin_unlock_irqrestore(&disp->lock, flags);
+}
+
+static irqreturn_t bfin_disp_isr(int irq, void *dev_id)
+{
+ struct ppi_if *ppi = dev_id;
+ struct bfin_disp_device *disp = ppi->priv;
+ struct vb2_buffer *vb = &disp->cur_frm->vb;
+ dma_addr_t addr;
+
+ spin_lock(&disp->lock);
+
+ if (!list_empty(&disp->dma_queue)) {
+ v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
+ vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+ disp->cur_frm = list_entry(disp->dma_queue.next,
+ struct bfin_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 bfin_disp_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct bfin_disp_device *disp = vb2_get_drv_priv(vq);
+ struct ppi_if *ppi = disp->ppi;
+ struct ppi_params params;
+ dma_addr_t addr;
+ unsigned long flags;
+ 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_DV_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,
+ "set ppi params failed\n");
+ return ret;
+ }
+
+ /* attach ppi DMA irq handler */
+ ret = ppi->ops->attach_irq(ppi, bfin_disp_isr);
+ if (ret < 0) {
+ v4l2_err(&disp->v4l2_dev,
+ "attach interrupt handler failed\n");
+ return ret;
+ }
+
+ spin_lock_irqsave(&disp->lock, flags);
+ /* if dma queue is empty, return error */
+ if (list_empty(&disp->dma_queue)) {
+ spin_unlock_irqrestore(&disp->lock, flags);
+ v4l2_err(&disp->v4l2_dev, "dma queue is empty\n");
+ return -EINVAL;
+ }
+
+ /* get the next frame from the dma queue */
+ disp->cur_frm = list_entry(disp->dma_queue.next,
+ struct bfin_disp_buffer, list);
+ /* remove buffer from the dma queue */
+ list_del(&disp->cur_frm->list);
+ spin_unlock_irqrestore(&disp->lock, flags);
+
+ 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;
+}
+
+static int bfin_disp_stop_streaming(struct vb2_queue *vq)
+{
+ struct bfin_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 bfin_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 bfin_disp_video_qops = {
+ .queue_setup = bfin_disp_queue_setup,
+ .buf_init = bfin_disp_buffer_init,
+ .buf_prepare = bfin_disp_buffer_prepare,
+ .buf_cleanup = bfin_disp_buffer_cleanup,
+ .buf_queue = bfin_disp_buffer_queue,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .start_streaming = bfin_disp_start_streaming,
+ .stop_streaming = bfin_disp_stop_streaming,
+};
+
+static int bfin_disp_g_std(struct file *file, void *priv, v4l2_std_id *std)
+{
+ struct bfin_disp_device *disp = video_drvdata(file);
+ struct bfin_display_config *config = disp->cfg;
+
+ if (!(config->outputs[disp->cur_output].capabilities
+ & V4L2_IN_CAP_STD))
+ return -ENODATA;
+
+ *std = disp->std;
+ return 0;
+}
+
+static int bfin_disp_s_std(struct file *file, void *priv, v4l2_std_id *std)
+{
+ struct bfin_disp_device *disp = video_drvdata(file);
+ struct bfin_display_config *config = disp->cfg;
+ int ret;
+
+ if (vb2_is_busy(&disp->buffer_queue))
+ return -EBUSY;
+
+ if (!(config->outputs[disp->cur_output].capabilities
+ & V4L2_IN_CAP_STD))
+ return -ENODATA;
+
+ ret = v4l2_subdev_call(disp->sd, video, s_std_output, *std);
+ if (ret < 0)
+ return ret;
+
+ disp->std = *std;
+ return 0;
+}
+
+static int bfin_disp_g_dv_timings(struct file *file, void *priv,
+ struct v4l2_dv_timings *timings)
+{
+ struct bfin_disp_device *disp = video_drvdata(file);
+ struct bfin_display_config *config = disp->cfg;
+ int ret;
+
+ if (!(config->outputs[disp->cur_output].capabilities
+ & V4L2_IN_CAP_DV_TIMINGS))
+ return -ENODATA;
+
+ ret = v4l2_subdev_call(disp->sd, video,
+ g_dv_timings, timings);
+ if (ret < 0)
+ return ret;
+
+ disp->dv_timings = *timings;
+ return 0;
+}
+
+static int bfin_disp_s_dv_timings(struct file *file, void *priv,
+ struct v4l2_dv_timings *timings)
+{
+ struct bfin_disp_device *disp = video_drvdata(file);
+ struct bfin_display_config *config = disp->cfg;
+ int ret;
+
+ if (vb2_is_busy(&disp->buffer_queue))
+ return -EBUSY;
+
+ if (!(config->outputs[disp->cur_output].capabilities
+ & V4L2_IN_CAP_DV_TIMINGS))
+ return -ENODATA;
+
+ ret = v4l2_subdev_call(disp->sd, video, s_dv_timings, timings);
+ if (ret < 0)
+ return ret;
+
+ disp->dv_timings = *timings;
+ return 0;
+}
+
+static int bfin_disp_enum_output(struct file *file, void *priv,
+ struct v4l2_output *output)
+{
+ struct bfin_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 bfin_disp_g_output(struct file *file, void *priv, unsigned int
*index)
+{
+ struct bfin_disp_device *disp = video_drvdata(file);
+
+ *index = disp->cur_output;
+ return 0;
+}
+
+static int bfin_disp_s_output(struct file *file, void *priv, unsigned int
index)
+{
+ struct bfin_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;
+ /* update tvnorms from the subdevice */
+ disp->video_dev.tvnorms = config->outputs[index].std;
+ /* if this route has specific config, update ppi control */
+ if (route->ppi_control)
+ config->ppi_control = route->ppi_control;
+ return 0;
+}
+
+static int bfin_disp_try_format(struct bfin_disp_device *disp,
+ struct v4l2_pix_format *pixfmt,
+ struct bfin_disp_format *bfin_disp_fmt)
+{
+ struct bfin_disp_format *df = disp->enc_formats;
+ struct bfin_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 (bfin_disp_fmt) {
+ for (i = 0; i < disp->num_enc_formats; i++) {
+ fmt = &df[i];
+ if (mbus_fmt.code == fmt->mbus_code)
+ break;
+ }
+ *bfin_disp_fmt = *fmt;
+ }
+ pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
+ pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
+ return 0;
+}
+
+static int bfin_disp_enum_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_fmtdesc *fmt)
+{
+ struct bfin_disp_device *disp = video_drvdata(file);
+ struct bfin_disp_format *df = disp->enc_formats;
+
+ if (fmt->index >= disp->num_enc_formats)
+ return -EINVAL;
+
+ strlcpy(fmt->description,
+ df[fmt->index].desc,
+ sizeof(fmt->description));
+ fmt->pixelformat = df[fmt->index].pixelformat;
+ return 0;
+}
+
+static int bfin_disp_try_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct bfin_disp_device *disp = video_drvdata(file);
+ struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
+
+ return bfin_disp_try_format(disp, pixfmt, NULL);
+}
+
+static int bfin_disp_g_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct bfin_disp_device *disp = video_drvdata(file);
+
+ fmt->fmt.pix = disp->fmt;
+ return 0;
+}
+
+static int bfin_disp_s_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct bfin_disp_device *disp = video_drvdata(file);
+ struct v4l2_mbus_framefmt mbus_fmt;
+ struct bfin_disp_format bfin_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 = bfin_disp_try_format(disp, pixfmt, &bfin_disp_fmt);
+ if (ret < 0)
+ return ret;
+
+ v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bfin_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 = bfin_disp_fmt.bpp;
+ disp->dlen = bfin_disp_fmt.dlen;
+ return 0;
+}
+
+static int bfin_disp_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct bfin_disp_device *disp = video_drvdata(file);
+
+ cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ 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 bfin_disp_g_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *a)
+{
+ struct bfin_disp_device *disp = video_drvdata(file);
+
+ return v4l2_subdev_call(disp->sd, video, g_parm, a);
+}
+
+static int bfin_disp_s_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *a)
+{
+ struct bfin_disp_device *disp = video_drvdata(file);
+
+ return v4l2_subdev_call(disp->sd, video, s_parm, a);
+}
+
+static int bfin_disp_log_status(struct file *file, void *priv)
+{
+ struct bfin_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 bfin_disp_ioctl_ops = {
+ .vidioc_querycap = bfin_disp_querycap,
+ .vidioc_g_fmt_vid_out = bfin_disp_g_fmt_vid_out,
+ .vidioc_enum_fmt_vid_out = bfin_disp_enum_fmt_vid_out,
+ .vidioc_s_fmt_vid_out = bfin_disp_s_fmt_vid_out,
+ .vidioc_try_fmt_vid_out = bfin_disp_try_fmt_vid_out,
+ .vidioc_enum_output = bfin_disp_enum_output,
+ .vidioc_g_output = bfin_disp_g_output,
+ .vidioc_s_output = bfin_disp_s_output,
+ .vidioc_s_std = bfin_disp_s_std,
+ .vidioc_g_std = bfin_disp_g_std,
+ .vidioc_s_dv_timings = bfin_disp_s_dv_timings,
+ .vidioc_g_dv_timings = bfin_disp_g_dv_timings,
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+ .vidioc_g_parm = bfin_disp_g_parm,
+ .vidioc_s_parm = bfin_disp_s_parm,
+ .vidioc_log_status = bfin_disp_log_status,
+};
+
+static struct v4l2_file_operations bfin_disp_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = vb2_fop_mmap,
+#ifndef CONFIG_MMU
+ .get_unmapped_area = vb2_fop_get_unmapped_area,
+#endif
+ .poll = vb2_fop_poll,
+};
+
+static int bfin_disp_probe(struct platform_device *pdev)
+{
+ struct bfin_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 || !config->num_outputs) {
+ v4l2_err(pdev->dev.driver, "Invalid board config\n");
+ return -ENODEV;
+ }
+
+ disp = devm_kzalloc(&pdev->dev, sizeof(*disp), GFP_KERNEL);
+ if (!disp)
+ return -ENOMEM;
+
+ disp->cfg = config;
+
+ disp->ppi = ppi_create_instance(config->ppi_info);
+ if (!disp->ppi)
+ return -ENODEV;
+ 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;
+ }
+
+ ret = v4l2_device_register(&pdev->dev, &disp->v4l2_dev);
+ if (ret) {
+ v4l2_err(pdev->dev.driver,
+ "Unable to register v4l2 device\n");
+ goto err_cleanup_ctx;
+ }
+
+ 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);
+ mutex_init(&disp->mutex);
+ mutex_init(&disp->qlock);
+ /* init video dma queues */
+ INIT_LIST_HEAD(&disp->dma_queue);
+
+ /* 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 bfin_disp_buffer);
+ q->ops = &bfin_disp_video_qops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ /* provide a mutex to vb2 queue */
+ q->lock = &disp->qlock;
+ q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+
+ ret = vb2_queue_init(q);
+ if (ret) {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to init videobuf2 queue\n");
+ goto err_free_handler;
+ }
+
+ /* initialize field of video device */
+ vfd = &disp->video_dev;
+ vfd->release = video_device_release_empty;
+ vfd->fops = &bfin_disp_fops;
+ vfd->ioctl_ops = &bfin_disp_ioctl_ops;
+ vfd->tvnorms = V4L2_STD_UNKNOWN;
+ vfd->v4l2_dev = &disp->v4l2_dev;
+ vfd->vfl_dir = VFL_DIR_TX;
+ vfd->queue = q;
+ set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
+ strncpy(vfd->name, DISPLAY_DRV_NAME, sizeof(vfd->name));
+ /* provide a mutex to v4l2 core */
+ vfd->lock = &disp->mutex;
+
+ /* 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_free_handler;
+
+ }
+ disp->sd = v4l2_i2c_new_subdev_board(&disp->v4l2_dev,
+ i2c_adap, &config->board_info, NULL);
+ if (!disp->sd) {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to register sub device\n");
+ goto err_put_adap;
+ }
+
+ /*
+ * 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, "Unable to set output\n");
+ goto err_unreg_sd;
+ }
+ disp->cur_output = 0;
+ /* update tvnorms from the subdevice */
+ vfd->tvnorms = config->outputs[0].std;
+ /* 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_sd;
+ }
+ disp->std = std;
+ }
+ if (config->outputs[0].capabilities & V4L2_IN_CAP_DV_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_sd;
+ }
+ disp->dv_timings = dv_timings;
+ }
+ ret = bfin_disp_init_encoder_formats(disp);
+ if (ret) {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to create encoder formats table\n");
+ goto err_unreg_sd;
+ }
+
+ /* register video device */
+ ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
+ if (ret) {
+ v4l2_err(&disp->v4l2_dev,
+ "Unable to register video device\n");
+ goto err_free_ef;
+ }
+ video_set_drvdata(vfd, disp);
+ v4l2_info(&disp->v4l2_dev, "video device registered as: %s\n",
+ video_device_node_name(vfd));
+
+ return 0;
+err_free_ef:
+ bfin_disp_free_encoder_formats(disp);
+err_unreg_sd:
+ v4l2_device_unregister_subdev(disp->sd);
+ i2c_unregister_device(v4l2_get_subdevdata(disp->sd));
+err_put_adap:
+ i2c_put_adapter(i2c_adap);
+err_free_handler:
+ v4l2_ctrl_handler_free(&disp->ctrl_handler);
+err_unreg_v4l2:
+ v4l2_device_unregister(&disp->v4l2_dev);
+err_cleanup_ctx:
+ vb2_dma_contig_cleanup_ctx(disp->alloc_ctx);
+err_free_ppi:
+ ppi_delete_instance(disp->ppi);
+ return ret;
+}
+
+static int bfin_disp_remove(struct platform_device *pdev)
+{
+ struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
+ struct bfin_disp_device *disp = container_of(v4l2_dev,
+ struct bfin_disp_device, v4l2_dev);
+ struct i2c_client *client = v4l2_get_subdevdata(disp->sd);
+
+ video_unregister_device(&disp->video_dev);
+ bfin_disp_free_encoder_formats(disp);
+ v4l2_device_unregister_subdev(disp->sd);
+ i2c_unregister_device(client);
+ i2c_put_adapter(client->adapter);
+ 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);
+ return 0;
+}
+
+static struct platform_driver bfin_disp_driver = {
+ .driver = {
+ .name = DISPLAY_DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = bfin_disp_probe,
+ .remove = bfin_disp_remove,
+};
+module_platform_driver(bfin_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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