/*
* vpif-display - VPIF display driver
* Display driver for TI DaVinci VPIF
*
* Copyright (C) 2009 Texas Instruments Incorporated - https://www.ti.com/
* Copyright (C) 2014 Lad, Prabhakar <[email protected]>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed .as is. WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <media/v4l2-ioctl.h>
#include "vpif.h"
#include "vpif_display.h"
MODULE_DESCRIPTION("TI DaVinci VPIF Display driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(VPIF_DISPLAY_VERSION);
#define VPIF_V4L2_STD (V4L2_STD_525_60 | V4L2_STD_625_50)
#define vpif_err(fmt, arg...) v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
#define vpif_dbg(level, debug, fmt, arg...) \
v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
static int debug = 1;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debug level 0-1");
#define VPIF_DRIVER_NAME "vpif_display"
MODULE_ALIAS("platform:" VPIF_DRIVER_NAME);
/* Is set to 1 in case of SDTV formats, 2 in case of HDTV formats. */
static int ycmux_mode;
static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} };
static struct vpif_device vpif_obj = { {NULL} };
static struct device *vpif_dev;
static void vpif_calculate_offsets(struct channel_obj *ch);
static void vpif_config_addr(struct channel_obj *ch, int muxmode);
static inline
struct vpif_disp_buffer *to_vpif_buffer(struct vb2_v4l2_buffer *vb)
{
return container_of(vb, struct vpif_disp_buffer, vb);
}
/**
* vpif_buffer_prepare : callback function for buffer prepare
* @vb: ptr to vb2_buffer
*
* This is the callback function for buffer prepare when vb2_qbuf()
* function is called. The buffer is prepared and user space virtual address
* or user address is converted into physical address
*/
static int vpif_buffer_prepare(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
struct common_obj *common;
common = &ch->common[VPIF_VIDEO_INDEX];
vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
return -EINVAL;
vbuf->field = common->fmt.fmt.pix.field;
if (vb->vb2_queue->type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) {
unsigned long addr = vb2_dma_contig_plane_dma_addr(vb, 0);
if (!ISALIGNED(addr + common->ytop_off) ||
!ISALIGNED(addr + common->ybtm_off) ||
!ISALIGNED(addr + common->ctop_off) ||
!ISALIGNED(addr + common->cbtm_off)) {
vpif_err("buffer offset not aligned to 8 bytes\n");
return -EINVAL;
}
}
return 0;
}
/**
* vpif_buffer_queue_setup : Callback function for buffer setup.
* @vq: vb2_queue ptr
* @nbuffers: ptr to number of buffers requested by application
* @nplanes: contains number of distinct video planes needed to hold a frame
* @sizes: contains the size (in bytes) of each plane.
* @alloc_devs: ptr to allocation context
*
* This callback function is called when reqbuf() is called to adjust
* the buffer count and buffer size
*/
static int vpif_buffer_queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct channel_obj *ch = vb2_get_drv_priv(vq);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
unsigned size = common->fmt.fmt.pix.sizeimage;
unsigned int q_num_bufs = vb2_get_num_buffers(vq);
if (*nplanes) {
if (sizes[0] < size)
return -EINVAL;
size = sizes[0];
}
if (q_num_bufs + *nbuffers < 3)
*nbuffers = 3 - q_num_bufs;
*nplanes = 1;
sizes[0] = size;
/* Calculate the offset for Y and C data in the buffer */
vpif_calculate_offsets(ch);
return 0;
}
/**
* vpif_buffer_queue : Callback function to add buffer to DMA queue
* @vb: ptr to vb2_buffer
*
* This callback function queues the buffer to DMA engine
*/
static void vpif_buffer_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct vpif_disp_buffer *buf = to_vpif_buffer(vbuf);
struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
struct common_obj *common;
unsigned long flags;
common = &ch->common[VPIF_VIDEO_INDEX];
/* add the buffer to the DMA queue */
spin_lock_irqsave(&common->irqlock, flags);
list_add_tail(&buf->list, &common->dma_queue);
spin_unlock_irqrestore(&common->irqlock, flags);
}
/**
* vpif_start_streaming : Starts the DMA engine for streaming
* @vq: ptr to vb2_buffer
* @count: number of buffers
*/
static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct vpif_display_config *vpif_config_data =
vpif_dev->platform_data;
struct channel_obj *ch = vb2_get_drv_priv(vq);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct vpif_params *vpif = &ch->vpifparams;
struct vpif_disp_buffer *buf, *tmp;
unsigned long addr, flags;
int ret;
spin_lock_irqsave(&common->irqlock, flags);
/* Initialize field_id */
ch->field_id = 0;
/* clock settings */
if (vpif_config_data->set_clock) {
ret = vpif_config_data->set_clock(ch->vpifparams.std_info.
ycmux_mode, ch->vpifparams.std_info.hd_sd);
if (ret < 0) {
vpif_err("can't set clock\n");
goto err;
}
}
/* set the parameters and addresses */
ret = vpif_set_video_params(vpif, ch->channel_id + 2);
if (ret < 0)
goto err;
ycmux_mode = ret;
vpif_config_addr(ch, ret);
/* Get the next frame from the buffer queue */
common->next_frm = common->cur_frm =
list_entry(common->dma_queue.next,
struct vpif_disp_buffer, list);
list_del(&common->cur_frm->list);
spin_unlock_irqrestore(&common->irqlock, flags);
addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb.vb2_buf, 0);
common->set_addr((addr + common->ytop_off),
(addr + common->ybtm_off),
(addr + common->ctop_off),
(addr + common->cbtm_off));
/*
* Set interrupt for both the fields in VPIF
* Register enable channel in VPIF register
*/
channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
channel2_intr_assert();
channel2_intr_enable(1);
enable_channel2(1);
if (vpif_config_data->chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
channel2_clipping_enable(1);
}
if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
channel3_intr_assert();
channel3_intr_enable(1);
enable_channel3(1);
if (vpif_config_data->chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
channel3_clipping_enable(1);
}
return 0;
err:
list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
list_del(&buf->list);
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
}
spin_unlock_irqrestore(&common->irqlock, flags);
return ret;
}
/**
* vpif_stop_streaming : Stop the DMA engine
* @vq: ptr to vb2_queue
*
* This callback stops the DMA engine and any remaining buffers
* in the DMA queue are released.
*/
static void vpif_stop_streaming(struct vb2_queue *vq)
{
struct channel_obj *ch = vb2_get_drv_priv(vq);
struct common_obj *common;
unsigned long flags;
common = &ch->common[VPIF_VIDEO_INDEX];
/* Disable channel */
if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
enable_channel2(0);
channel2_intr_enable(0);
}
if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
enable_channel3(0);
channel3_intr_enable(0);
}
/* release all active buffers */
spin_lock_irqsave(&common->irqlock, flags);
if (common->cur_frm == common->next_frm) {
vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
VB2_BUF_STATE_ERROR);
} else {
if (common->cur_frm)
vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
VB2_BUF_STATE_ERROR);
if (common->next_frm)
vb2_buffer_done(&common->next_frm->vb.vb2_buf,
VB2_BUF_STATE_ERROR);
}
while (!list_empty(&common->dma_queue)) {
common->next_frm = list_entry(common->dma_queue.next,
struct vpif_disp_buffer, list);
list_del(&common->next_frm->list);
vb2_buffer_done(&common->next_frm->vb.vb2_buf,
VB2_BUF_STATE_ERROR);
}
spin_unlock_irqrestore(&common->irqlock, flags);
}
static const struct vb2_ops video_qops = {
.queue_setup = vpif_buffer_queue_setup,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
.buf_prepare = vpif_buffer_prepare,
.start_streaming = vpif_start_streaming,
.stop_streaming = vpif_stop_streaming,
.buf_queue = vpif_buffer_queue,
};
static void process_progressive_mode(struct common_obj *common)
{
unsigned long addr;
spin_lock(&common->irqlock);
/* Get the next buffer from buffer queue */
common->next_frm = list_entry(common->dma_queue.next,
struct vpif_disp_buffer, list);
/* Remove that buffer from the buffer queue */
list_del(&common->next_frm->list);
spin_unlock(&common->irqlock);
/* Set top and bottom field addrs in VPIF registers */
addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb.vb2_buf, 0);
common->set_addr(addr + common->ytop_off,
addr + common->ybtm_off,
addr + common->ctop_off,
addr + common->cbtm_off);
}
static void process_interlaced_mode(int fid, struct common_obj *common)
{
/* device field id and local field id are in sync */
/* If this is even field */
if (0 == fid) {
if (common->cur_frm == common->next_frm)
return;
/* one frame is displayed If next frame is
* available, release cur_frm and move on */
/* Copy frame display time */
common->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns();
/* Change status of the cur_frm */
vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
VB2_BUF_STATE_DONE);
/* Make cur_frm pointing to next_frm */
common->cur_frm = common->next_frm;
} else if (1 == fid) { /* odd field */
spin_lock(&common->irqlock);
if (list_empty(&common->dma_queue)
|| (common->cur_frm != common->next_frm)) {
spin_unlock(&common->irqlock);
return;
}
spin_unlock(&common->irqlock);
/* one field is displayed configure the next
* frame if it is available else hold on current
* frame */
/* Get next from the buffer queue */
process_progressive_mode(common);
}
}
/*
* vpif_channel_isr: It changes status of the displayed buffer, takes next
* buffer from the queue and sets its address in VPIF registers
*/
static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
{
struct vpif_device *dev = &vpif_obj;
struct channel_obj *ch;
struct common_obj *common;
int fid = -1, i;
int channel_id;
channel_id = *(int *)(dev_id);
if (!vpif_intr_status(channel_id + 2))
return IRQ_NONE;
ch = dev->dev[channel_id];
for (i = 0; i < VPIF_NUMOBJECTS; i++) {
common = &ch->common[i];
/* If streaming is started in this channel */
if (1 == ch->vpifparams.std_info.frm_fmt) {
spin_lock(&common->irqlock);
if (list_empty(&common->dma_queue)) {
spin_unlock(&common->irqlock);
continue;
}
spin_unlock(&common->irqlock);
/* Progressive mode */
if (!channel_first_int[i][channel_id]) {
/* Mark status of the cur_frm to
* done and unlock semaphore on it */
common->cur_frm->vb.vb2_buf.timestamp =
ktime_get_ns();
vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
VB2_BUF_STATE_DONE);
/* Make cur_frm pointing to next_frm */
common->cur_frm = common->next_frm;
}
channel_first_int[i][channel_id] = 0;
process_progressive_mode(common);
} else {
/* Interlaced mode */
/* If it is first interrupt, ignore it */
if (channel_first_int[i][channel_id]) {
channel_first_int[i][channel_id] = 0;
continue;
}
if (0 == i) {
ch->field_id ^= 1;
/* Get field id from VPIF registers */
fid = vpif_channel_getfid(ch->channel_id + 2);
/* If fid does not match with stored field id */
if (fid != ch->field_id) {
/* Make them in sync */
if (0 == fid)
ch->field_id = fid;
return IRQ_HANDLED;
}
}
process_interlaced_mode(fid, common);
}
}
return IRQ_HANDLED;
}
static int vpif_update_std_info(struct channel_obj *ch)
{
struct video_obj *vid_ch = &ch->video;
struct vpif_params *vpifparams = &ch->vpifparams;
struct vpif_channel_config_params *std_info = &vpifparams->std_info;
const struct vpif_channel_config_params *config;
int i;
for (i = 0; i < vpif_ch_params_count; i++) {
config = &vpif_ch_params[i];
if (config->hd_sd == 0) {
vpif_dbg(2, debug, "SD format\n");
if (config->stdid & vid_ch->stdid) {
memcpy(std_info, config, sizeof(*config));
break;
}
}
}
if (i == vpif_ch_params_count) {
vpif_dbg(1, debug, "Format not found\n");
return -EINVAL;
}
return 0;
}
static int vpif_update_resolution(struct channel_obj *ch)
{
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct video_obj *vid_ch = &ch->video;
struct vpif_params *vpifparams = &ch->vpifparams;
struct vpif_channel_config_params *std_info = &vpifparams->std_info;
if (!vid_ch->stdid && !vid_ch->dv_timings.bt.height)
return -EINVAL;
if (vid_ch->stdid) {
if (vpif_update_std_info(ch))
return -EINVAL;
}
common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
common->fmt.fmt.pix.width = std_info->width;
common->fmt.fmt.pix.height = std_info->height;
vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n",
common->fmt.fmt.pix.width, common->fmt.fmt.pix.height);
/* Set height and width paramateres */
common->height = std_info->height;
common->width = std_info->width;
common->fmt.fmt.pix.sizeimage = common->height * common->width * 2;
if (vid_ch->stdid)
common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
else
common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
if (ch->vpifparams.std_info.frm_fmt)
common->fmt.fmt.pix.field = V4L2_FIELD_NONE;
else
common->fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
return 0;
}
/*
* vpif_calculate_offsets: This function calculates buffers offset for Y and C
* in the top and bottom field
*/
static void vpif_calculate_offsets(struct channel_obj *ch)
{
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct vpif_params *vpifparams = &ch->vpifparams;
enum v4l2_field field = common->fmt.fmt.pix.field;
struct video_obj *vid_ch = &ch->video;
unsigned int hpitch, sizeimage;
if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) {
if (ch->vpifparams.std_info.frm_fmt)
vid_ch->buf_field = V4L2_FIELD_NONE;
else
vid_ch->buf_field = V4L2_FIELD_INTERLACED;
} else {
vid_ch->buf_field = common->fmt.fmt.pix.field;
}
sizeimage = common->fmt.fmt.pix.sizeimage;
hpitch = common->fmt.fmt.pix.bytesperline;
if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
(V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
common->ytop_off = 0;
common->ybtm_off = hpitch;
common->ctop_off = sizeimage / 2;
common->cbtm_off = sizeimage / 2 + hpitch;
} else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
common->ytop_off = 0;
common->ybtm_off = sizeimage / 4;
common->ctop_off = sizeimage / 2;
common->cbtm_off = common->ctop_off + sizeimage / 4;
} else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
common->ybtm_off = 0;
common->ytop_off = sizeimage / 4;
common->cbtm_off = sizeimage / 2;
common->ctop_off = common->cbtm_off + sizeimage / 4;
}
if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
(V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
vpifparams->video_params.storage_mode = 1;
} else {
vpifparams->video_params.storage_mode = 0;
}
if (ch->vpifparams.std_info.frm_fmt == 1) {
vpifparams->video_params.hpitch =
common->fmt.fmt.pix.bytesperline;
} else {
if ((field == V4L2_FIELD_ANY) ||
(field == V4L2_FIELD_INTERLACED))
vpifparams->video_params.hpitch =
common->fmt.fmt.pix.bytesperline * 2;
else
vpifparams->video_params.hpitch =
common->fmt.fmt.pix.bytesperline;
}
ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid;
}
static void vpif_config_addr(struct channel_obj *ch, int muxmode)
{
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
common->set_addr = ch3_set_video_buf_addr;
} else {
if (2 == muxmode)
common->set_addr = ch2_set_video_buf_addr_yc_nmux;
else
common->set_addr = ch2_set_video_buf_addr;
}
}
/* functions implementing ioctls */
/**
* vpif_querycap() - QUERYCAP handler
* @file: file ptr
* @priv: file handle
* @cap: ptr to v4l2_capability structure
*/
static int vpif_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct vpif_display_config *config = vpif_dev->platform_data;
strscpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
strscpy(cap->card, config->card_name, sizeof(cap->card));
return 0;
}
static int vpif_enum_fmt_vid_out(struct file *file, void *priv,
struct v4l2_fmtdesc *fmt)
{
if (fmt->index != 0)
return -EINVAL;
/* Fill in the information about format */
fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
return 0;
}
static int vpif_g_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct video_device *vdev = video_devdata(file);
struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
/* Check the validity of the buffer type */
if (common->fmt.type != fmt->type)
return -EINVAL;
if (vpif_update_resolution(ch))
return -EINVAL;
*fmt = common->fmt;
return 0;
}
static int vpif_try_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct video_device *vdev = video_devdata(file);
struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
/*
* to suppress v4l-compliance warnings silently correct
* the pixelformat
*/
if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
pixfmt->pixelformat = common->fmt.fmt.pix.pixelformat;
if (vpif_update_resolution(ch))
return -EINVAL;
pixfmt->colorspace = common->fmt.fmt.pix.colorspace;
pixfmt->field = common->fmt.fmt.pix.field;
pixfmt->bytesperline = common->fmt.fmt.pix.width;
pixfmt->width = common->fmt.fmt.pix.width;
pixfmt->height = common->fmt.fmt.pix.height;
pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height * 2;
return 0;
}
static int vpif_s_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct video_device *vdev = video_devdata(file);
struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
int ret;
if (vb2_is_busy(&common->buffer_queue))
return -EBUSY;
ret = vpif_try_fmt_vid_out(file, priv, fmt);
if (ret)
return ret;
/* store the pix format in the channel object */
common->fmt.fmt.pix = *pixfmt;
/* store the format in the channel object */
common->fmt = *fmt;
return 0;
}
static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
{
struct vpif_display_config *config = vpif_dev->platform_data;
struct video_device *vdev = video_devdata(file);
struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct vpif_display_chan_config *chan_cfg;
struct v4l2_output output;
int ret;
if (!config->chan_config[ch->channel_id].outputs)
return -ENODATA;
chan_cfg = &config->chan_config[ch->channel_id];
output = chan_cfg->outputs[ch->output_idx].output;
if (output.capabilities != V4L2_OUT_CAP_STD)
return -ENODATA;
if (vb2_is_busy(&common->buffer_queue))
return -EBUSY;
if (!(std_id & VPIF_V4L2_STD))
return -EINVAL;
/* Call encoder subdevice function to set the standard */
ch->video.stdid = std_id;
memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
/* Get the information about the standard */
if (vpif_update_resolution(ch))
return -EINVAL;
common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
s_std_output, std_id);
if (ret < 0) {
vpif_err("Failed to set output standard\n");
return ret;
}
ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
s_std, std_id);
if (ret < 0)
vpif_err("Failed to set standard for sub devices\n");
return ret;
}
static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
{
struct vpif_display_config *config = vpif_dev->platform_data;
struct video_device *vdev = video_devdata(file);
struct channel_obj *ch = video_get_drvdata(vdev);
struct vpif_display_chan_config *chan_cfg;
struct v4l2_output output;
if (!config->chan_config[ch->channel_id].outputs)
return -ENODATA;
chan_cfg = &config->chan_config[ch->channel_id];
output = chan_cfg->outputs[ch->output_idx].output;
if (output.capabilities != V4L2_OUT_CAP_STD)
return -ENODATA;
*std = ch->video.stdid;
return 0;
}
static int vpif_enum_output(struct file *file, void *fh,
struct v4l2_output *output)
{
struct vpif_display_config *config = vpif_dev->platform_data;
struct video_device *vdev = video_devdata(file);
struct channel_obj *ch = video_get_drvdata(vdev);
struct vpif_display_chan_config *chan_cfg;
chan_cfg = &config->chan_config[ch->channel_id];
if (output->index >= chan_cfg->output_count) {
vpif_dbg(1, debug, "Invalid output index\n");
return -EINVAL;
}
*output = chan_cfg->outputs[output->index].output;
return 0;
}
/**
* vpif_output_to_subdev() - Maps output to sub device
* @vpif_cfg: global config ptr
* @chan_cfg: channel config ptr
* @index: Given output index from application
*
* lookup the sub device information for a given output index.
* we report all the output to application. output table also
* has sub device name for the each output
*/
static int
vpif_output_to_subdev(struct vpif_display_config *vpif_cfg,
struct vpif_display_chan_config *chan_cfg, int index)
{
struct vpif_subdev_info *subdev_info;
const char *subdev_name;
int i;
vpif_dbg(2, debug, "vpif_output_to_subdev\n");
if (!chan_cfg->outputs)
return -1;
subdev_name = chan_cfg->outputs[index].subdev_name;
if (!subdev_name)
return -1;
/* loop through the sub device list to get the sub device info */
for (i = 0; i < vpif_cfg->subdev_count; i++) {
subdev_info = &vpif_cfg->subdevinfo[i];
if (!strcmp(subdev_info->name, subdev_name))
return i;
}
return -1;
}
/**
* vpif_set_output() - Select an output
* @vpif_cfg: global config ptr
* @ch: channel
* @index: Given output index from application
*
* Select the given output.
*/
static int vpif_set_output(struct vpif_display_config *vpif_cfg,
struct channel_obj *ch, int index)
{
struct vpif_display_chan_config *chan_cfg =
&vpif_cfg->chan_config[ch->channel_id];
struct v4l2_subdev *sd = NULL;
u32 input = 0, output = 0;
int sd_index;
int ret;
sd_index = vpif_output_to_subdev(vpif_cfg, chan_cfg, index);
if (sd_index >= 0)
sd = vpif_obj.sd[sd_index];
if (sd) {
input = chan_cfg->outputs[index].input_route;
output = chan_cfg->outputs[index].output_route;
ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
if (ret < 0 && ret != -ENOIOCTLCMD) {
vpif_err("Failed to set output\n");
return ret;
}
}
ch->output_idx = index;
ch->sd = sd;
if (chan_cfg->outputs)
/* update tvnorms from the sub device output info */
ch->video_dev.tvnorms = chan_cfg->outputs[index].output.std;
return 0;
}
static int vpif_s_output(struct file *file, void *priv, unsigned int i)
{
struct vpif_display_config *config = vpif_dev->platform_data;
struct video_device *vdev = video_devdata(file);
struct channel_obj *ch = video_get_drvdata(vdev);
struct vpif_display_chan_config *chan_cfg;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
if (vb2_is_busy(&common->buffer_queue))
return -EBUSY;
chan_cfg = &config->chan_config[ch->channel_id];
if (i >= chan_cfg->output_count)
return -EINVAL;
return vpif_set_output(config, ch, i);
}
static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
{
struct video_device *vdev = video_devdata(file);
struct channel_obj *ch = video_get_drvdata(vdev);
*i = ch->output_idx;
return 0;
}
/**
* vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
* @file: file ptr
* @priv: file handle
* @timings: input timings
*/
static int
vpif_enum_dv_timings(struct file *file, void *priv,
struct v4l2_enum_dv_timings *timings)
{
struct vpif_display_config *config = vpif_dev->platform_data;
struct video_device *vdev = video_devdata(file);
struct channel_obj *ch = video_get_drvdata(vdev);
struct vpif_display_chan_config *chan_cfg;
struct v4l2_output output;
int ret;
if (!config->chan_config[ch->channel_id].outputs)
return -ENODATA;
chan_cfg = &config->chan_config[ch->channel_id];
output = chan_cfg->outputs[ch->output_idx].output;
if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
return -ENODATA;
timings->pad = 0;
ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
if (ret == -ENOIOCTLCMD || ret == -ENODEV)
return -EINVAL;
return ret;
}
/**
* vpif_s_dv_timings() - S_DV_TIMINGS handler
* @file: file ptr
* @priv: file handle
* @timings: digital video timings
*/
static int vpif_s_dv_timings(struct file *file, void *priv,
struct v4l2_dv_timings *timings)
{
struct vpif_display_config *config = vpif_dev->platform_data;
struct video_device *vdev = video_devdata(file);
struct channel_obj *ch = video_get_drvdata(vdev);
struct vpif_params *vpifparams = &ch->vpifparams;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct vpif_channel_config_params *std_info = &vpifparams->std_info;
struct video_obj *vid_ch = &ch->video;
struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
struct vpif_display_chan_config *chan_cfg;
struct v4l2_output output;
int ret;
if (!config->chan_config[ch->channel_id].outputs)
return -ENODATA;
chan_cfg = &config->chan_config[ch->channel_id];
output = chan_cfg->outputs[ch->output_idx].output;
if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
return -ENODATA;
if (vb2_is_busy(&common->buffer_queue))
return -EBUSY;
if (timings->type != V4L2_DV_BT_656_1120) {
vpif_dbg(2, debug, "Timing type not defined\n");
return -EINVAL;
}
/* Configure subdevice timings, if any */
ret = v4l2_subdev_call(ch->sd, pad, s_dv_timings, 0, timings);
if (ret == -ENOIOCTLCMD || ret == -ENODEV)
ret = 0;
if (ret < 0) {
vpif_dbg(2, debug, "Error setting custom DV timings\n");
return ret;
}
if (!(timings->bt.width && timings->bt.height &&
(timings->bt.hbackporch ||
timings->bt.hfrontporch ||
timings->bt.hsync) &&
timings->bt.vfrontporch &&
(timings->bt.vbackporch ||
timings->bt.vsync))) {
vpif_dbg(2, debug, "Timings for width, height, horizontal back porch, horizontal sync, horizontal front porch, vertical back porch, vertical sync and vertical back porch must be defined\n");
return -EINVAL;
}
vid_ch->dv_timings = *timings;
/* Configure video port timings */
std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
std_info->sav2eav = bt->width;
std_info->l1 = 1;
std_info->l3 = bt->vsync + bt->vbackporch + 1;
std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
if (bt->interlaced) {
if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
std_info->l5 = std_info->vsize/2 -
(bt->vfrontporch - 1);
std_info->l7 = std_info->vsize/2 + 1;
std_info->l9 = std_info->l7 + bt->il_vsync +
bt->il_vbackporch + 1;
std_info->l11 = std_info->vsize -
(bt->il_vfrontporch - 1);
} else {
vpif_dbg(2, debug, "Required timing values for interlaced BT format missing\n");
return -EINVAL;
}
} else {
std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
}
strscpy(std_info->name, "Custom timings BT656/1120",
sizeof(std_info->name));
std_info->width = bt->width;
std_info->height = bt->height;
std_info->frm_fmt = bt->interlaced ? 0 : 1;
std_info->ycmux_mode = 0;
std_info->capture_format = 0;
std_info->vbi_supported = 0;
std_info->hd_sd = 1;
std_info->stdid = 0;
vid_ch->stdid = 0;
return 0;
}
/**
* vpif_g_dv_timings() - G_DV_TIMINGS handler
* @file: file ptr
* @priv: file handle
* @timings: digital video timings
*/
static int vpif_g_dv_timings(struct file *file, void *priv,
struct v4l2_dv_timings *timings)
{
struct vpif_display_config *config = vpif_dev->platform_data;
struct video_device *vdev = video_devdata(file);
struct channel_obj *ch = video_get_drvdata(vdev);
struct vpif_display_chan_config *chan_cfg;
struct video_obj *vid_ch = &ch->video;
struct v4l2_output output;
if (!config->chan_config[ch->channel_id].outputs)
goto error;
chan_cfg = &config->chan_config[ch->channel_id];
output = chan_cfg->outputs[ch->output_idx].output;
if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
goto error;
*timings = vid_ch->dv_timings;
return 0;
error:
return -ENODATA;
}
/*
* vpif_log_status() - Status information
* @file: file ptr
* @priv: file handle
*
* Returns zero.
*/
static int vpif_log_status(struct file *filep, void *priv)
{
/* status for sub devices */
v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
return 0;
}
/* vpif display ioctl operations */
static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
.vidioc_querycap = vpif_querycap,
.vidioc_enum_fmt_vid_out = vpif_enum_fmt_vid_out,
.vidioc_g_fmt_vid_out = vpif_g_fmt_vid_out,
.vidioc_s_fmt_vid_out = vpif_s_fmt_vid_out,
.vidioc_try_fmt_vid_out = vpif_try_fmt_vid_out,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_s_std = vpif_s_std,
.vidioc_g_std = vpif_g_std,
.vidioc_enum_output = vpif_enum_output,
.vidioc_s_output = vpif_s_output,
.vidioc_g_output = vpif_g_output,
.vidioc_enum_dv_timings = vpif_enum_dv_timings,
.vidioc_s_dv_timings = vpif_s_dv_timings,
.vidioc_g_dv_timings = vpif_g_dv_timings,
.vidioc_log_status = vpif_log_status,
};
static const struct v4l2_file_operations vpif_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = vb2_fop_release,
.unlocked_ioctl = video_ioctl2,
.mmap = vb2_fop_mmap,
.poll = vb2_fop_poll
};
/*Configure the channels, buffer sizei, request irq */
static int initialize_vpif(void)
{
int free_channel_objects_index;
int err, i, j;
/* Allocate memory for six channel objects */
for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
vpif_obj.dev[i] =
kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
/* If memory allocation fails, return error */
if (!vpif_obj.dev[i]) {
free_channel_objects_index = i;
err = -ENOMEM;
goto vpif_init_free_channel_objects;
}
}
return 0;
vpif_init_free_channel_objects:
for (j = 0; j < free_channel_objects_index; j++)
kfree(vpif_obj.dev[j]);
return err;
}
static void free_vpif_objs(void)
{
int i;
for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++)
kfree(vpif_obj.dev[i]);
}
static int vpif_probe_complete(void)
{
struct common_obj *common;
struct video_device *vdev;
struct channel_obj *ch;
struct vb2_queue *q;
int j, err, k;
for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
ch = vpif_obj.dev[j];
/* Initialize field of the channel objects */
for (k = 0; k < VPIF_NUMOBJECTS; k++) {
common = &ch->common[k];
spin_lock_init(&common->irqlock);
mutex_init(&common->lock);
common->set_addr = NULL;
common->ytop_off = 0;
common->ybtm_off = 0;
common->ctop_off = 0;
common->cbtm_off = 0;
common->cur_frm = NULL;
common->next_frm = NULL;
memset(&common->fmt, 0, sizeof(common->fmt));
}
ch->initialized = 0;
if (vpif_obj.config->subdev_count)
ch->sd = vpif_obj.sd[0];
ch->channel_id = j;
memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
ch->common[VPIF_VIDEO_INDEX].fmt.type =
V4L2_BUF_TYPE_VIDEO_OUTPUT;
/* select output 0 */
err = vpif_set_output(vpif_obj.config, ch, 0);
if (err)
goto probe_out;
/* set initial format */
ch->video.stdid = V4L2_STD_525_60;
memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
vpif_update_resolution(ch);
/* Initialize vb2 queue */
q = &common->buffer_queue;
q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
q->drv_priv = ch;
q->ops = &video_qops;
q->mem_ops = &vb2_dma_contig_memops;
q->buf_struct_size = sizeof(struct vpif_disp_buffer);
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
q->min_queued_buffers = 1;
q->lock = &common->lock;
q->dev = vpif_dev;
err = vb2_queue_init(q);
if (err) {
vpif_err("vpif_display: vb2_queue_init() failed\n");
goto probe_out;
}
INIT_LIST_HEAD(&common->dma_queue);
/* register video device */
vpif_dbg(1, debug, "channel=%p,channel->video_dev=%p\n",
ch, &ch->video_dev);
/* Initialize the video_device structure */
vdev = &ch->video_dev;
strscpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
vdev->release = video_device_release_empty;
vdev->fops = &vpif_fops;
vdev->ioctl_ops = &vpif_ioctl_ops;
vdev->v4l2_dev = &vpif_obj.v4l2_dev;
vdev->vfl_dir = VFL_DIR_TX;
vdev->queue = q;
vdev->lock = &common->lock;
vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
video_set_drvdata(&ch->video_dev, ch);
err = video_register_device(vdev, VFL_TYPE_VIDEO,
(j ? 3 : 2));
if (err < 0)
goto probe_out;
}
return 0;
probe_out:
for (k = 0; k < j; k++) {
ch = vpif_obj.dev[k];
video_unregister_device(&ch->video_dev);
}
return err;
}
/*
* vpif_probe: This function creates device entries by register itself to the
* V4L2 driver and initializes fields of each channel objects
*/
static __init int vpif_probe(struct platform_device *pdev)
{
struct vpif_subdev_info *subdevdata;
struct i2c_adapter *i2c_adap;
int subdev_count;
int res_idx = 0;
int i, err;
if (!pdev->dev.platform_data) {
dev_warn(&pdev->dev, "Missing platform data. Giving up.\n");
return -EINVAL;
}
vpif_dev = &pdev->dev;
err = initialize_vpif();
if (err) {
v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
return err;
}
err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
if (err) {
v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
goto vpif_free;
}
do {
int irq;
err = platform_get_irq_optional(pdev, res_idx);
if (err < 0 && err != -ENXIO)
goto vpif_unregister;
if (err > 0)
irq = err;
else
break;
err = devm_request_irq(&pdev->dev, irq, vpif_channel_isr,
IRQF_SHARED, VPIF_DRIVER_NAME,
(void *)(&vpif_obj.dev[res_idx]->channel_id));
if (err) {
vpif_err("VPIF IRQ request failed\n");
goto vpif_unregister;
}
} while (++res_idx);
vpif_obj.config = pdev->dev.platform_data;
subdev_count = vpif_obj.config->subdev_count;
subdevdata = vpif_obj.config->subdevinfo;
vpif_obj.sd = kcalloc(subdev_count, sizeof(*vpif_obj.sd), GFP_KERNEL);
if (!vpif_obj.sd) {
err = -ENOMEM;
goto vpif_unregister;
}
i2c_adap = i2c_get_adapter(vpif_obj.config->i2c_adapter_id);
for (i = 0; i < subdev_count; i++) {
vpif_obj.sd[i] =
v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
i2c_adap,
&subdevdata[i].board_info,
NULL);
if (!vpif_obj.sd[i]) {
vpif_err("Error registering v4l2 subdevice\n");
err = -ENODEV;
goto probe_subdev_out;
}
vpif_obj.sd[i]->grp_id = 1 << i;
}
err = vpif_probe_complete();
if (err)
goto probe_subdev_out;
return 0;
probe_subdev_out:
kfree(vpif_obj.sd);
vpif_unregister:
v4l2_device_unregister(&vpif_obj.v4l2_dev);
vpif_free:
free_vpif_objs();
return err;
}
/*
* vpif_remove: It un-register channels from V4L2 driver
*/
static void vpif_remove(struct platform_device *device)
{
struct channel_obj *ch;
int i;
v4l2_device_unregister(&vpif_obj.v4l2_dev);
kfree(vpif_obj.sd);
/* un-register device */
for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
/* Get the pointer to the channel object */
ch = vpif_obj.dev[i];
/* Unregister video device */
video_unregister_device(&ch->video_dev);
}
free_vpif_objs();
}
#ifdef CONFIG_PM_SLEEP
static int vpif_suspend(struct device *dev)
{
struct common_obj *common;
struct channel_obj *ch;
int i;
for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
/* Get the pointer to the channel object */
ch = vpif_obj.dev[i];
common = &ch->common[VPIF_VIDEO_INDEX];
if (!vb2_start_streaming_called(&common->buffer_queue))
continue;
mutex_lock(&common->lock);
/* Disable channel */
if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
enable_channel2(0);
channel2_intr_enable(0);
}
if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
ycmux_mode == 2) {
enable_channel3(0);
channel3_intr_enable(0);
}
mutex_unlock(&common->lock);
}
return 0;
}
static int vpif_resume(struct device *dev)
{
struct common_obj *common;
struct channel_obj *ch;
int i;
for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
/* Get the pointer to the channel object */
ch = vpif_obj.dev[i];
common = &ch->common[VPIF_VIDEO_INDEX];
if (!vb2_start_streaming_called(&common->buffer_queue))
continue;
mutex_lock(&common->lock);
/* Enable channel */
if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
enable_channel2(1);
channel2_intr_enable(1);
}
if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
ycmux_mode == 2) {
enable_channel3(1);
channel3_intr_enable(1);
}
mutex_unlock(&common->lock);
}
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
static __refdata struct platform_driver vpif_driver = {
.driver = {
.name = VPIF_DRIVER_NAME,
.pm = &vpif_pm_ops,
},
.probe = vpif_probe,
.remove_new = vpif_remove,
};
module_platform_driver(vpif_driver);
Codebase Browser
linux