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Subject[Patch 08/13] media: am437x-vpfe: Maintain a reference to the current vpfe_fmt
Date
Keep a reference to the currently selected struct vpfe_fmt * object.
By doing so we rename the current struct v4l2_format * member from
fmt to v_fmt.
The added struct vpfe_fmt * reference is set to "const" so we also
constify all accesses and related helper functions.

Signed-off-by: Benoit Parrot <bparrot@ti.com>
---
drivers/media/platform/am437x/am437x-vpfe.c | 88 +++++++++++++--------
drivers/media/platform/am437x/am437x-vpfe.h | 3 +-
2 files changed, 55 insertions(+), 36 deletions(-)

diff --git a/drivers/media/platform/am437x/am437x-vpfe.c b/drivers/media/platform/am437x/am437x-vpfe.c
index e76dc2b3b7b8..a8f6cf1d06a0 100644
--- a/drivers/media/platform/am437x/am437x-vpfe.c
+++ b/drivers/media/platform/am437x/am437x-vpfe.c
@@ -147,8 +147,8 @@ static int
__vpfe_get_format(struct vpfe_device *vpfe,
struct v4l2_format *format, unsigned int *bpp);

-static struct vpfe_fmt *find_format_by_code(struct vpfe_device *vpfe,
- unsigned int code)
+static const struct vpfe_fmt *find_format_by_code(struct vpfe_device *vpfe,
+ unsigned int code)
{
struct vpfe_fmt *fmt;
unsigned int k;
@@ -162,8 +162,8 @@ static struct vpfe_fmt *find_format_by_code(struct vpfe_device *vpfe,
return NULL;
}

-static struct vpfe_fmt *find_format_by_pix(struct vpfe_device *vpfe,
- unsigned int pixelformat)
+static const struct vpfe_fmt *find_format_by_pix(struct vpfe_device *vpfe,
+ unsigned int pixelformat)
{
struct vpfe_fmt *fmt;
unsigned int k;
@@ -184,7 +184,7 @@ mbus_to_pix(struct vpfe_device *vpfe,
{
struct vpfe_subdev_info *sdinfo = vpfe->current_subdev;
unsigned int bus_width = sdinfo->vpfe_param.bus_width;
- struct vpfe_fmt *fmt;
+ const struct vpfe_fmt *fmt;

fmt = find_format_by_code(vpfe, mbus->code);
if (WARN_ON(fmt == NULL)) {
@@ -207,7 +207,7 @@ static void pix_to_mbus(struct vpfe_device *vpfe,
struct v4l2_pix_format *pix_fmt,
struct v4l2_mbus_framefmt *mbus_fmt)
{
- struct vpfe_fmt *fmt;
+ const struct vpfe_fmt *fmt;

fmt = find_format_by_pix(vpfe, pix_fmt->pixelformat);
if (!fmt) {
@@ -990,10 +990,10 @@ static int vpfe_config_ccdc_image_format(struct vpfe_device *vpfe)
vpfe_dbg(2, vpfe, "vpfe_config_ccdc_image_format\n");

vpfe_dbg(1, vpfe, "pixelformat: %s\n",
- print_fourcc(vpfe->fmt.fmt.pix.pixelformat));
+ print_fourcc(vpfe->v_fmt.fmt.pix.pixelformat));

if (vpfe_ccdc_set_pixel_format(&vpfe->ccdc,
- vpfe->fmt.fmt.pix.pixelformat) < 0) {
+ vpfe->v_fmt.fmt.pix.pixelformat) < 0) {
vpfe_err(vpfe, "couldn't set pix format in ccdc\n");
return -EINVAL;
}
@@ -1001,7 +1001,7 @@ static int vpfe_config_ccdc_image_format(struct vpfe_device *vpfe)
/* configure the image window */
vpfe_ccdc_set_image_window(&vpfe->ccdc, &vpfe->crop, vpfe->bpp);

- switch (vpfe->fmt.fmt.pix.field) {
+ switch (vpfe->v_fmt.fmt.pix.field) {
case V4L2_FIELD_INTERLACED:
/* do nothing, since it is default */
ret = vpfe_ccdc_set_buftype(
@@ -1043,7 +1043,8 @@ static int vpfe_config_ccdc_image_format(struct vpfe_device *vpfe)
static int vpfe_config_image_format(struct vpfe_device *vpfe,
v4l2_std_id std_id)
{
- struct v4l2_pix_format *pix = &vpfe->fmt.fmt.pix;
+ const struct vpfe_fmt *fmt;
+ struct v4l2_pix_format *pix = &vpfe->v_fmt.fmt.pix;
int i, ret;

for (i = 0; i < ARRAY_SIZE(vpfe_standards); i++) {
@@ -1078,10 +1079,18 @@ static int vpfe_config_image_format(struct vpfe_device *vpfe,
else
pix->field = V4L2_FIELD_NONE;

- ret = __vpfe_get_format(vpfe, &vpfe->fmt, &vpfe->bpp);
+ ret = __vpfe_get_format(vpfe, &vpfe->v_fmt, &vpfe->bpp);
if (ret)
return ret;

+ fmt = find_format_by_pix(vpfe, pix->pixelformat);
+ if (!fmt) {
+ vpfe_dbg(3, vpfe, "Invalid pixel code: %4.4s\n",
+ (char *)&pix->pixelformat);
+ return -EINVAL;
+ }
+ vpfe->fmt = fmt;
+
/* Update the crop window based on found values */
vpfe->crop.width = pix->width;
vpfe->crop.height = pix->height;
@@ -1227,7 +1236,7 @@ static inline void vpfe_schedule_bottom_field(struct vpfe_device *vpfe)
static inline void vpfe_process_buffer_complete(struct vpfe_device *vpfe)
{
vpfe->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns();
- vpfe->cur_frm->vb.field = vpfe->fmt.fmt.pix.field;
+ vpfe->cur_frm->vb.field = vpfe->v_fmt.fmt.pix.field;
vpfe->cur_frm->vb.sequence = vpfe->sequence++;
vb2_buffer_done(&vpfe->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
vpfe->cur_frm = vpfe->next_frm;
@@ -1296,7 +1305,7 @@ static void vpfe_handle_interlaced_irq(struct vpfe_device *vpfe,
static irqreturn_t vpfe_isr(int irq, void *dev)
{
struct vpfe_device *vpfe = (struct vpfe_device *)dev;
- enum v4l2_field field = vpfe->fmt.fmt.pix.field;
+ enum v4l2_field field = vpfe->v_fmt.fmt.pix.field;
int intr_status, stopping = vpfe->stopping;

intr_status = vpfe_reg_read(&vpfe->ccdc, VPFE_IRQ_STS);
@@ -1397,7 +1406,7 @@ static int __vpfe_get_format(struct vpfe_device *vpfe,
mbus_to_pix(vpfe, &mbus_fmt, &format->fmt.pix, bpp);
}

- format->type = vpfe->fmt.type;
+ format->type = vpfe->v_fmt.type;

vpfe_dbg(1, vpfe,
"%s size %dx%d (%s) bytesperline = %d, size = %d, bpp = %d\n",
@@ -1434,7 +1443,7 @@ static int __vpfe_set_format(struct vpfe_device *vpfe,
v4l2_fill_pix_format(&format->fmt.pix, &fmt.format);
mbus_to_pix(vpfe, &fmt.format, &format->fmt.pix, bpp);

- format->type = vpfe->fmt.type;
+ format->type = vpfe->v_fmt.type;

vpfe_dbg(1, vpfe,
"%s size %dx%d (%s) bytesperline = %d, size = %d, bpp = %d\n",
@@ -1452,7 +1461,7 @@ static int vpfe_g_fmt(struct file *file, void *priv,

vpfe_dbg(2, vpfe, "vpfe_g_fmt\n");

- *fmt = vpfe->fmt;
+ *fmt = vpfe->v_fmt;

return 0;
}
@@ -1496,9 +1505,10 @@ static int vpfe_try_fmt(struct file *file, void *priv,
}

static int vpfe_s_fmt(struct file *file, void *priv,
- struct v4l2_format *fmt)
+ struct v4l2_format *f)
{
struct vpfe_device *vpfe = video_drvdata(file);
+ const struct vpfe_fmt *fmt;
struct v4l2_format format;
unsigned int bpp;
int ret;
@@ -1515,25 +1525,32 @@ static int vpfe_s_fmt(struct file *file, void *priv,
if (ret)
return ret;

-
- if (!cmp_v4l2_format(fmt, &format)) {
+ if (!cmp_v4l2_format(f, &format)) {
/* Sensor format is different from the requested format
* so we need to change it
*/
- ret = __vpfe_set_format(vpfe, fmt, &bpp);
+ ret = __vpfe_set_format(vpfe, f, &bpp);
if (ret)
return ret;
} else /* Just make sure all of the fields are consistent */
- *fmt = format;
+ *f = format;
+
+ fmt = find_format_by_pix(vpfe, f->fmt.pix.pixelformat);
+ if (!fmt) {
+ vpfe_dbg(3, vpfe, "Invalid pixel code: %4.4s, This should not happen!!\n",
+ (char *)&f->fmt.pix.pixelformat);
+ return -EINVAL;
+ }

/* First detach any IRQ if currently attached */
vpfe_detach_irq(vpfe);
- vpfe->fmt = *fmt;
+ vpfe->v_fmt = *f;
vpfe->bpp = bpp;
+ vpfe->fmt = fmt;

/* Update the crop window based on found values */
- vpfe->crop.width = fmt->fmt.pix.width;
- vpfe->crop.height = fmt->fmt.pix.height;
+ vpfe->crop.width = f->fmt.pix.width;
+ vpfe->crop.height = f->fmt.pix.height;

/* set image capture parameters in the ccdc */
return vpfe_config_ccdc_image_format(vpfe);
@@ -1547,7 +1564,7 @@ static int vpfe_enum_size(struct file *file, void *priv,
struct vpfe_subdev_info *sdinfo;
struct v4l2_mbus_framefmt mbus;
struct v4l2_pix_format pix;
- struct vpfe_fmt *fmt;
+ const struct vpfe_fmt *fmt;
int ret;

vpfe_dbg(2, vpfe, "vpfe_enum_size\n");
@@ -1850,7 +1867,7 @@ static int vpfe_queue_setup(struct vb2_queue *vq,
unsigned int sizes[], struct device *alloc_devs[])
{
struct vpfe_device *vpfe = vb2_get_drv_priv(vq);
- unsigned size = vpfe->fmt.fmt.pix.sizeimage;
+ unsigned int size = vpfe->v_fmt.fmt.pix.sizeimage;

if (vq->num_buffers + *nbuffers < 3)
*nbuffers = 3 - vq->num_buffers;
@@ -1886,12 +1903,12 @@ static int vpfe_buffer_prepare(struct vb2_buffer *vb)
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct vpfe_device *vpfe = vb2_get_drv_priv(vb->vb2_queue);

- vb2_set_plane_payload(vb, 0, vpfe->fmt.fmt.pix.sizeimage);
+ vb2_set_plane_payload(vb, 0, vpfe->v_fmt.fmt.pix.sizeimage);

if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
return -EINVAL;

- vbuf->field = vpfe->fmt.fmt.pix.field;
+ vbuf->field = vpfe->v_fmt.fmt.pix.field;

return 0;
}
@@ -2116,11 +2133,12 @@ vpfe_s_selection(struct file *file, void *fh, struct v4l2_selection *s)
s->r = vpfe->crop = r;

vpfe_ccdc_set_image_window(&vpfe->ccdc, &r, vpfe->bpp);
- vpfe->fmt.fmt.pix.width = r.width;
- vpfe->fmt.fmt.pix.height = r.height;
- vpfe->fmt.fmt.pix.bytesperline = vpfe_ccdc_get_line_length(&vpfe->ccdc);
- vpfe->fmt.fmt.pix.sizeimage = vpfe->fmt.fmt.pix.bytesperline *
- vpfe->fmt.fmt.pix.height;
+ vpfe->v_fmt.fmt.pix.width = r.width;
+ vpfe->v_fmt.fmt.pix.height = r.height;
+ vpfe->v_fmt.fmt.pix.bytesperline =
+ vpfe_ccdc_get_line_length(&vpfe->ccdc);
+ vpfe->v_fmt.fmt.pix.sizeimage = vpfe->v_fmt.fmt.pix.bytesperline *
+ vpfe->v_fmt.fmt.pix.height;

vpfe_dbg(1, vpfe, "cropped (%d,%d)/%dx%d of %dx%d\n",
r.left, r.top, r.width, r.height, cr.width, cr.height);
@@ -2156,7 +2174,7 @@ static long vpfe_ioctl_default(struct file *file, void *priv,
return ret;
}
ret = vpfe_get_ccdc_image_format(vpfe,
- &vpfe->fmt);
+ &vpfe->v_fmt);
if (ret < 0) {
vpfe_dbg(2, vpfe,
"Invalid image format at CCDC\n");
@@ -2309,7 +2327,7 @@ static int vpfe_probe_complete(struct vpfe_device *vpfe)
spin_lock_init(&vpfe->dma_queue_lock);
mutex_init(&vpfe->lock);

- vpfe->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ vpfe->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;

/* set first sub device as current one */
vpfe->current_subdev = &vpfe->cfg->sub_devs[0];
diff --git a/drivers/media/platform/am437x/am437x-vpfe.h b/drivers/media/platform/am437x/am437x-vpfe.h
index 6f25750f84e4..64a25bf720e4 100644
--- a/drivers/media/platform/am437x/am437x-vpfe.h
+++ b/drivers/media/platform/am437x/am437x-vpfe.h
@@ -280,7 +280,8 @@ struct vpfe_device {
/* Pointer pointing to next v4l2_buffer */
struct vpfe_cap_buffer *next_frm;
/* Used to store pixel format */
- struct v4l2_format fmt;
+ const struct vpfe_fmt *fmt;
+ struct v4l2_format v_fmt;
/* Used to store current bytes per pixel based on current format */
unsigned int bpp;
struct vpfe_fmt *active_fmt[VPFE_MAX_ACTIVE_FMT];
--
2.17.1
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