mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
[media] media: i.MX27 camera: Add resizing support
If the attached video sensor cannot provide the requested image size, try to use resizing engine included in the eMMa-PrP IP. This patch supports both averaging and bilinear algorithms. Signed-off-by: Javier Martin <javier.martin@vista-silicon.com> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
parent
e9de6167fb
commit
750a6dff6e
1 changed files with 256 additions and 4 deletions
|
@ -19,6 +19,7 @@
|
|||
#include <linux/dma-mapping.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/gcd.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/mm.h>
|
||||
|
@ -204,8 +205,23 @@
|
|||
#define PRP_INTR_LBOVF (1 << 7)
|
||||
#define PRP_INTR_CH2OVF (1 << 8)
|
||||
|
||||
/* Resizing registers */
|
||||
#define PRP_RZ_VALID_TBL_LEN(x) ((x) << 24)
|
||||
#define PRP_RZ_VALID_BILINEAR (1 << 31)
|
||||
|
||||
#define MAX_VIDEO_MEM 16
|
||||
|
||||
#define RESIZE_NUM_MIN 1
|
||||
#define RESIZE_NUM_MAX 20
|
||||
#define BC_COEF 3
|
||||
#define SZ_COEF (1 << BC_COEF)
|
||||
|
||||
#define RESIZE_DIR_H 0
|
||||
#define RESIZE_DIR_V 1
|
||||
|
||||
#define RESIZE_ALGO_BILINEAR 0
|
||||
#define RESIZE_ALGO_AVERAGING 1
|
||||
|
||||
struct mx2_prp_cfg {
|
||||
int channel;
|
||||
u32 in_fmt;
|
||||
|
@ -215,6 +231,13 @@ struct mx2_prp_cfg {
|
|||
u32 irq_flags;
|
||||
};
|
||||
|
||||
/* prp resizing parameters */
|
||||
struct emma_prp_resize {
|
||||
int algo; /* type of algorithm used */
|
||||
int len; /* number of coefficients */
|
||||
unsigned char s[RESIZE_NUM_MAX]; /* table of coefficients */
|
||||
};
|
||||
|
||||
/* prp configuration for a client-host fmt pair */
|
||||
struct mx2_fmt_cfg {
|
||||
enum v4l2_mbus_pixelcode in_fmt;
|
||||
|
@ -274,6 +297,8 @@ struct mx2_camera_dev {
|
|||
dma_addr_t discard_buffer_dma;
|
||||
size_t discard_size;
|
||||
struct mx2_fmt_cfg *emma_prp;
|
||||
struct emma_prp_resize resizing[2];
|
||||
unsigned int s_width, s_height;
|
||||
u32 frame_count;
|
||||
struct vb2_alloc_ctx *alloc_ctx;
|
||||
};
|
||||
|
@ -678,7 +703,7 @@ static void mx27_camera_emma_buf_init(struct soc_camera_device *icd,
|
|||
struct mx2_camera_dev *pcdev = ici->priv;
|
||||
struct mx2_fmt_cfg *prp = pcdev->emma_prp;
|
||||
|
||||
writel((icd->user_width << 16) | icd->user_height,
|
||||
writel((pcdev->s_width << 16) | pcdev->s_height,
|
||||
pcdev->base_emma + PRP_SRC_FRAME_SIZE);
|
||||
writel(prp->cfg.src_pixel,
|
||||
pcdev->base_emma + PRP_SRC_PIXEL_FORMAT_CNTL);
|
||||
|
@ -698,6 +723,74 @@ static void mx27_camera_emma_buf_init(struct soc_camera_device *icd,
|
|||
writel(prp->cfg.irq_flags, pcdev->base_emma + PRP_INTR_CNTL);
|
||||
}
|
||||
|
||||
static void mx2_prp_resize_commit(struct mx2_camera_dev *pcdev)
|
||||
{
|
||||
int dir;
|
||||
|
||||
for (dir = RESIZE_DIR_H; dir <= RESIZE_DIR_V; dir++) {
|
||||
unsigned char *s = pcdev->resizing[dir].s;
|
||||
int len = pcdev->resizing[dir].len;
|
||||
unsigned int coeff[2] = {0, 0};
|
||||
unsigned int valid = 0;
|
||||
int i;
|
||||
|
||||
if (len == 0)
|
||||
continue;
|
||||
|
||||
for (i = RESIZE_NUM_MAX - 1; i >= 0; i--) {
|
||||
int j;
|
||||
|
||||
j = i > 9 ? 1 : 0;
|
||||
coeff[j] = (coeff[j] << BC_COEF) |
|
||||
(s[i] & (SZ_COEF - 1));
|
||||
|
||||
if (i == 5 || i == 15)
|
||||
coeff[j] <<= 1;
|
||||
|
||||
valid = (valid << 1) | (s[i] >> BC_COEF);
|
||||
}
|
||||
|
||||
valid |= PRP_RZ_VALID_TBL_LEN(len);
|
||||
|
||||
if (pcdev->resizing[dir].algo == RESIZE_ALGO_BILINEAR)
|
||||
valid |= PRP_RZ_VALID_BILINEAR;
|
||||
|
||||
if (pcdev->emma_prp->cfg.channel == 1) {
|
||||
if (dir == RESIZE_DIR_H) {
|
||||
writel(coeff[0], pcdev->base_emma +
|
||||
PRP_CH1_RZ_HORI_COEF1);
|
||||
writel(coeff[1], pcdev->base_emma +
|
||||
PRP_CH1_RZ_HORI_COEF2);
|
||||
writel(valid, pcdev->base_emma +
|
||||
PRP_CH1_RZ_HORI_VALID);
|
||||
} else {
|
||||
writel(coeff[0], pcdev->base_emma +
|
||||
PRP_CH1_RZ_VERT_COEF1);
|
||||
writel(coeff[1], pcdev->base_emma +
|
||||
PRP_CH1_RZ_VERT_COEF2);
|
||||
writel(valid, pcdev->base_emma +
|
||||
PRP_CH1_RZ_VERT_VALID);
|
||||
}
|
||||
} else {
|
||||
if (dir == RESIZE_DIR_H) {
|
||||
writel(coeff[0], pcdev->base_emma +
|
||||
PRP_CH2_RZ_HORI_COEF1);
|
||||
writel(coeff[1], pcdev->base_emma +
|
||||
PRP_CH2_RZ_HORI_COEF2);
|
||||
writel(valid, pcdev->base_emma +
|
||||
PRP_CH2_RZ_HORI_VALID);
|
||||
} else {
|
||||
writel(coeff[0], pcdev->base_emma +
|
||||
PRP_CH2_RZ_VERT_COEF1);
|
||||
writel(coeff[1], pcdev->base_emma +
|
||||
PRP_CH2_RZ_VERT_COEF2);
|
||||
writel(valid, pcdev->base_emma +
|
||||
PRP_CH2_RZ_VERT_VALID);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
|
||||
{
|
||||
struct soc_camera_device *icd = soc_camera_from_vb2q(q);
|
||||
|
@ -764,6 +857,8 @@ static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
|
|||
list_add_tail(&pcdev->buf_discard[1].queue,
|
||||
&pcdev->discard);
|
||||
|
||||
mx2_prp_resize_commit(pcdev);
|
||||
|
||||
mx27_camera_emma_buf_init(icd, bytesperline);
|
||||
|
||||
if (prp->cfg.channel == 1) {
|
||||
|
@ -1049,6 +1144,123 @@ static int mx2_camera_get_formats(struct soc_camera_device *icd,
|
|||
return formats;
|
||||
}
|
||||
|
||||
static int mx2_emmaprp_resize(struct mx2_camera_dev *pcdev,
|
||||
struct v4l2_mbus_framefmt *mf_in,
|
||||
struct v4l2_pix_format *pix_out, bool apply)
|
||||
{
|
||||
int num, den;
|
||||
unsigned long m;
|
||||
int i, dir;
|
||||
|
||||
for (dir = RESIZE_DIR_H; dir <= RESIZE_DIR_V; dir++) {
|
||||
struct emma_prp_resize tmprsz;
|
||||
unsigned char *s = tmprsz.s;
|
||||
int len = 0;
|
||||
int in, out;
|
||||
|
||||
if (dir == RESIZE_DIR_H) {
|
||||
in = mf_in->width;
|
||||
out = pix_out->width;
|
||||
} else {
|
||||
in = mf_in->height;
|
||||
out = pix_out->height;
|
||||
}
|
||||
|
||||
if (in < out)
|
||||
return -EINVAL;
|
||||
else if (in == out)
|
||||
continue;
|
||||
|
||||
/* Calculate ratio */
|
||||
m = gcd(in, out);
|
||||
num = in / m;
|
||||
den = out / m;
|
||||
if (num > RESIZE_NUM_MAX)
|
||||
return -EINVAL;
|
||||
|
||||
if ((num >= 2 * den) && (den == 1) &&
|
||||
(num < 9) && (!(num & 0x01))) {
|
||||
int sum = 0;
|
||||
int j;
|
||||
|
||||
/* Average scaling for >= 2:1 ratios */
|
||||
/* Support can be added for num >=9 and odd values */
|
||||
|
||||
tmprsz.algo = RESIZE_ALGO_AVERAGING;
|
||||
len = num;
|
||||
|
||||
for (i = 0; i < (len / 2); i++)
|
||||
s[i] = 8;
|
||||
|
||||
do {
|
||||
for (i = 0; i < (len / 2); i++) {
|
||||
s[i] = s[i] >> 1;
|
||||
sum = 0;
|
||||
for (j = 0; j < (len / 2); j++)
|
||||
sum += s[j];
|
||||
if (sum == 4)
|
||||
break;
|
||||
}
|
||||
} while (sum != 4);
|
||||
|
||||
for (i = (len / 2); i < len; i++)
|
||||
s[i] = s[len - i - 1];
|
||||
|
||||
s[len - 1] |= SZ_COEF;
|
||||
} else {
|
||||
/* bilinear scaling for < 2:1 ratios */
|
||||
int v; /* overflow counter */
|
||||
int coeff, nxt; /* table output */
|
||||
int in_pos_inc = 2 * den;
|
||||
int out_pos = num;
|
||||
int out_pos_inc = 2 * num;
|
||||
int init_carry = num - den;
|
||||
int carry = init_carry;
|
||||
|
||||
tmprsz.algo = RESIZE_ALGO_BILINEAR;
|
||||
v = den + in_pos_inc;
|
||||
do {
|
||||
coeff = v - out_pos;
|
||||
out_pos += out_pos_inc;
|
||||
carry += out_pos_inc;
|
||||
for (nxt = 0; v < out_pos; nxt++) {
|
||||
v += in_pos_inc;
|
||||
carry -= in_pos_inc;
|
||||
}
|
||||
|
||||
if (len > RESIZE_NUM_MAX)
|
||||
return -EINVAL;
|
||||
|
||||
coeff = ((coeff << BC_COEF) +
|
||||
(in_pos_inc >> 1)) / in_pos_inc;
|
||||
|
||||
if (coeff >= (SZ_COEF - 1))
|
||||
coeff--;
|
||||
|
||||
coeff |= SZ_COEF;
|
||||
s[len] = (unsigned char)coeff;
|
||||
len++;
|
||||
|
||||
for (i = 1; i < nxt; i++) {
|
||||
if (len >= RESIZE_NUM_MAX)
|
||||
return -EINVAL;
|
||||
s[len] = 0;
|
||||
len++;
|
||||
}
|
||||
} while (carry != init_carry);
|
||||
}
|
||||
tmprsz.len = len;
|
||||
if (dir == RESIZE_DIR_H)
|
||||
mf_in->width = pix_out->width;
|
||||
else
|
||||
mf_in->height = pix_out->height;
|
||||
|
||||
if (apply)
|
||||
memcpy(&pcdev->resizing[dir], &tmprsz, sizeof(tmprsz));
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mx2_camera_set_fmt(struct soc_camera_device *icd,
|
||||
struct v4l2_format *f)
|
||||
{
|
||||
|
@ -1060,6 +1272,9 @@ static int mx2_camera_set_fmt(struct soc_camera_device *icd,
|
|||
struct v4l2_mbus_framefmt mf;
|
||||
int ret;
|
||||
|
||||
dev_dbg(icd->parent, "%s: requested params: width = %d, height = %d\n",
|
||||
__func__, pix->width, pix->height);
|
||||
|
||||
xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
|
||||
if (!xlate) {
|
||||
dev_warn(icd->parent, "Format %x not found\n",
|
||||
|
@ -1077,6 +1292,22 @@ static int mx2_camera_set_fmt(struct soc_camera_device *icd,
|
|||
if (ret < 0 && ret != -ENOIOCTLCMD)
|
||||
return ret;
|
||||
|
||||
/* Store width and height returned by the sensor for resizing */
|
||||
pcdev->s_width = mf.width;
|
||||
pcdev->s_height = mf.height;
|
||||
dev_dbg(icd->parent, "%s: sensor params: width = %d, height = %d\n",
|
||||
__func__, pcdev->s_width, pcdev->s_height);
|
||||
|
||||
pcdev->emma_prp = mx27_emma_prp_get_format(xlate->code,
|
||||
xlate->host_fmt->fourcc);
|
||||
|
||||
memset(pcdev->resizing, 0, sizeof(pcdev->resizing));
|
||||
if ((mf.width != pix->width || mf.height != pix->height) &&
|
||||
pcdev->emma_prp->cfg.in_fmt == PRP_CNTL_DATA_IN_YUV422) {
|
||||
if (mx2_emmaprp_resize(pcdev, &mf, pix, true) < 0)
|
||||
dev_dbg(icd->parent, "%s: can't resize\n", __func__);
|
||||
}
|
||||
|
||||
if (mf.code != xlate->code)
|
||||
return -EINVAL;
|
||||
|
||||
|
@ -1086,9 +1317,8 @@ static int mx2_camera_set_fmt(struct soc_camera_device *icd,
|
|||
pix->colorspace = mf.colorspace;
|
||||
icd->current_fmt = xlate;
|
||||
|
||||
if (cpu_is_mx27())
|
||||
pcdev->emma_prp = mx27_emma_prp_get_format(xlate->code,
|
||||
xlate->host_fmt->fourcc);
|
||||
dev_dbg(icd->parent, "%s: returned params: width = %d, height = %d\n",
|
||||
__func__, pix->width, pix->height);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
@ -1101,9 +1331,14 @@ static int mx2_camera_try_fmt(struct soc_camera_device *icd,
|
|||
struct v4l2_pix_format *pix = &f->fmt.pix;
|
||||
struct v4l2_mbus_framefmt mf;
|
||||
__u32 pixfmt = pix->pixelformat;
|
||||
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
|
||||
struct mx2_camera_dev *pcdev = ici->priv;
|
||||
unsigned int width_limit;
|
||||
int ret;
|
||||
|
||||
dev_dbg(icd->parent, "%s: requested params: width = %d, height = %d\n",
|
||||
__func__, pix->width, pix->height);
|
||||
|
||||
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
|
||||
if (pixfmt && !xlate) {
|
||||
dev_warn(icd->parent, "Format %x not found\n", pixfmt);
|
||||
|
@ -1153,6 +1388,20 @@ static int mx2_camera_try_fmt(struct soc_camera_device *icd,
|
|||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
dev_dbg(icd->parent, "%s: sensor params: width = %d, height = %d\n",
|
||||
__func__, pcdev->s_width, pcdev->s_height);
|
||||
|
||||
/* If the sensor does not support image size try PrP resizing */
|
||||
pcdev->emma_prp = mx27_emma_prp_get_format(xlate->code,
|
||||
xlate->host_fmt->fourcc);
|
||||
|
||||
memset(pcdev->resizing, 0, sizeof(pcdev->resizing));
|
||||
if ((mf.width != pix->width || mf.height != pix->height) &&
|
||||
pcdev->emma_prp->cfg.in_fmt == PRP_CNTL_DATA_IN_YUV422) {
|
||||
if (mx2_emmaprp_resize(pcdev, &mf, pix, false) < 0)
|
||||
dev_dbg(icd->parent, "%s: can't resize\n", __func__);
|
||||
}
|
||||
|
||||
if (mf.field == V4L2_FIELD_ANY)
|
||||
mf.field = V4L2_FIELD_NONE;
|
||||
/*
|
||||
|
@ -1171,6 +1420,9 @@ static int mx2_camera_try_fmt(struct soc_camera_device *icd,
|
|||
pix->field = mf.field;
|
||||
pix->colorspace = mf.colorspace;
|
||||
|
||||
dev_dbg(icd->parent, "%s: returned params: width = %d, height = %d\n",
|
||||
__func__, pix->width, pix->height);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in a new issue