[Patch 07/13] media: am437x-vpfe: Use a per instance format array instead of a static one

Benoit Parrot
2019-09-09T16:26:44Z

Using a statically defined format array would cause issue when
multiple vpfe instance would be connected to sub-device of
different capabilities. We need to use an instance based array
instead to properly maintain a per port/instance format list.

Signed-off-by: Benoit Parrot <bparrot@ti.com>
---
drivers/media/platform/am437x/am437x-vpfe.c | 108 ++++++++------------
drivers/media/platform/am437x/am437x-vpfe.h | 34 ++++++
2 files changed, 74 insertions(+), 68 deletions(-)

diff --git a/drivers/media/platform/am437x/am437x-vpfe.c b/drivers/media/platform/am437x/am437x-vpfe.c
index ac759c066d00..e76dc2b3b7b8 100644
--- a/drivers/media/platform/am437x/am437x-vpfe.c
+++ b/drivers/media/platform/am437x/am437x-vpfe.c
@@ -69,30 +69,6 @@ static const struct vpfe_standard vpfe_standards[] = {
{V4L2_STD_625_50, 720, 576, {54, 59}, 1},
};

-struct bus_format {
- unsigned int width;
- unsigned int bpp;
-};
-
-/*
- * struct vpfe_fmt - VPFE media bus format information
- * @code: V4L2 media bus format code
- * @shifted: V4L2 media bus format code for the same pixel layout but
- * shifted to be 8 bits per pixel. =0 if format is not shiftable.
- * @pixelformat: V4L2 pixel format FCC identifier
- * @width: Bits per pixel (when transferred over a bus)
- * @bpp: Bytes per pixel (when stored in memory)
- * @supported: Indicates format supported by subdev
- */
-struct vpfe_fmt {
- u32 fourcc;
- u32 code;
- struct bus_format l;
- struct bus_format s;
- bool supported;
- u32 index;
-};
-
static struct vpfe_fmt formats[] = {
{
.fourcc = V4L2_PIX_FMT_YUYV,
@@ -101,7 +77,6 @@ static struct vpfe_fmt formats[] = {
.l.bpp = 4,
.s.width = 8,
.s.bpp = 2,
- .supported = false,
}, {
.fourcc = V4L2_PIX_FMT_UYVY,
.code = MEDIA_BUS_FMT_UYVY8_2X8,
@@ -109,7 +84,6 @@ static struct vpfe_fmt formats[] = {
.l.bpp = 4,
.s.width = 8,
.s.bpp = 2,
- .supported = false,
}, {
.fourcc = V4L2_PIX_FMT_YVYU,
.code = MEDIA_BUS_FMT_YVYU8_2X8,
@@ -117,7 +91,6 @@ static struct vpfe_fmt formats[] = {
.l.bpp = 4,
.s.width = 8,
.s.bpp = 2,
- .supported = false,
}, {
.fourcc = V4L2_PIX_FMT_VYUY,
.code = MEDIA_BUS_FMT_VYUY8_2X8,
@@ -125,7 +98,6 @@ static struct vpfe_fmt formats[] = {
.l.bpp = 4,
.s.width = 8,
.s.bpp = 2,
- .supported = false,
}, {
.fourcc = V4L2_PIX_FMT_SBGGR8,
.code = MEDIA_BUS_FMT_SBGGR8_1X8,
@@ -133,7 +105,6 @@ static struct vpfe_fmt formats[] = {
.l.bpp = 2,
.s.width = 8,
.s.bpp = 1,
- .supported = false,
}, {
.fourcc = V4L2_PIX_FMT_SGBRG8,
.code = MEDIA_BUS_FMT_SGBRG8_1X8,
@@ -141,7 +112,6 @@ static struct vpfe_fmt formats[] = {
.l.bpp = 2,
.s.width = 8,
.s.bpp = 1,
- .supported = false,
}, {
.fourcc = V4L2_PIX_FMT_SGRBG8,
.code = MEDIA_BUS_FMT_SGRBG8_1X8,
@@ -149,7 +119,6 @@ static struct vpfe_fmt formats[] = {
.l.bpp = 2,
.s.width = 8,
.s.bpp = 1,
- .supported = false,
}, {
.fourcc = V4L2_PIX_FMT_SRGGB8,
.code = MEDIA_BUS_FMT_SRGGB8_1X8,
@@ -157,7 +126,6 @@ static struct vpfe_fmt formats[] = {
.l.bpp = 2,
.s.width = 8,
.s.bpp = 1,
- .supported = false,
}, {
.fourcc = V4L2_PIX_FMT_RGB565,
.code = MEDIA_BUS_FMT_RGB565_2X8_LE,
@@ -165,7 +133,6 @@ static struct vpfe_fmt formats[] = {
.l.bpp = 4,
.s.width = 8,
.s.bpp = 2,
- .supported = false,
}, {
.fourcc = V4L2_PIX_FMT_RGB565X,
.code = MEDIA_BUS_FMT_RGB565_2X8_BE,
@@ -173,7 +140,6 @@ static struct vpfe_fmt formats[] = {
.l.bpp = 4,
.s.width = 8,
.s.bpp = 2,
- .supported = false,
},
};

@@ -181,13 +147,14 @@ static int
__vpfe_get_format(struct vpfe_device *vpfe,
struct v4l2_format *format, unsigned int *bpp);

-static struct vpfe_fmt *find_format_by_code(unsigned int code)
+static struct vpfe_fmt *find_format_by_code(struct vpfe_device *vpfe,
+ unsigned int code)
{
struct vpfe_fmt *fmt;
unsigned int k;

- for (k = 0; k < ARRAY_SIZE(formats); k++) {
- fmt = &formats[k];
+ for (k = 0; k < vpfe->num_active_fmt; k++) {
+ fmt = vpfe->active_fmt[k];
if (fmt->code == code)
return fmt;
}
@@ -195,13 +162,14 @@ static struct vpfe_fmt *find_format_by_code(unsigned int code)
return NULL;
}

-static struct vpfe_fmt *find_format_by_pix(unsigned int pixelformat)
+static struct vpfe_fmt *find_format_by_pix(struct vpfe_device *vpfe,
+ unsigned int pixelformat)
{
struct vpfe_fmt *fmt;
unsigned int k;

- for (k = 0; k < ARRAY_SIZE(formats); k++) {
- fmt = &formats[k];
+ for (k = 0; k < vpfe->num_active_fmt; k++) {
+ fmt = vpfe->active_fmt[k];
if (fmt->fourcc == pixelformat)
return fmt;
}
@@ -218,7 +186,7 @@ mbus_to_pix(struct vpfe_device *vpfe,
unsigned int bus_width = sdinfo->vpfe_param.bus_width;
struct vpfe_fmt *fmt;

- fmt = find_format_by_code(mbus->code);
+ fmt = find_format_by_code(vpfe, mbus->code);
if (WARN_ON(fmt == NULL)) {
pr_err("Invalid mbus code set\n");
*bpp = 1;
@@ -241,12 +209,12 @@ static void pix_to_mbus(struct vpfe_device *vpfe,
{
struct vpfe_fmt *fmt;

- fmt = find_format_by_pix(pix_fmt->pixelformat);
+ fmt = find_format_by_pix(vpfe, pix_fmt->pixelformat);
if (!fmt) {
/* default to first entry */
vpfe_dbg(3, vpfe, "Invalid pixel code: %x, default used instead\n",
pix_fmt->pixelformat);
- fmt = &formats[0];
+ fmt = vpfe->active_fmt[0];
}

memset(mbus_fmt, 0, sizeof(*mbus_fmt));
@@ -1494,8 +1462,7 @@ static int vpfe_enum_fmt(struct file *file, void *priv,
{
struct vpfe_device *vpfe = video_drvdata(file);
struct vpfe_subdev_info *sdinfo;
- struct vpfe_fmt *fmt = NULL;
- unsigned int k;
+ struct vpfe_fmt *fmt;

vpfe_dbg(2, vpfe, "vpfe_enum_format index:%d\n",
f->index);
@@ -1504,17 +1471,10 @@ static int vpfe_enum_fmt(struct file *file, void *priv,
if (!sdinfo->sd)
return -EINVAL;

- if (f->index > ARRAY_SIZE(formats))
+ if (f->index >= vpfe->num_active_fmt)
return -EINVAL;

- for (k = 0; k < ARRAY_SIZE(formats); k++) {
- if (formats[k].index == f->index) {
- fmt = &formats[k];
- break;
- }
- }
- if (!fmt)
- return -EINVAL;
+ fmt = vpfe->active_fmt[f->index];

f->pixelformat = fmt->fourcc;

@@ -1593,7 +1553,7 @@ static int vpfe_enum_size(struct file *file, void *priv,
vpfe_dbg(2, vpfe, "vpfe_enum_size\n");

/* check for valid format */
- fmt = find_format_by_pix(fsize->pixel_format);
+ fmt = find_format_by_pix(vpfe, fsize->pixel_format);
if (!fmt) {
vpfe_dbg(3, vpfe, "Invalid pixel code: %x, default used instead\n",
fsize->pixel_format);
@@ -2281,8 +2241,10 @@ vpfe_async_bound(struct v4l2_async_notifier *notifier,
struct vpfe_device, v4l2_dev);
struct v4l2_subdev_mbus_code_enum mbus_code;
struct vpfe_subdev_info *sdinfo;
+ struct vpfe_fmt *fmt;
+ int ret = 0;
bool found = false;
- int i, j;
+ int i, j, k;

vpfe_dbg(1, vpfe, "vpfe_async_bound\n");

@@ -2304,27 +2266,37 @@ vpfe_async_bound(struct v4l2_async_notifier *notifier,

vpfe->video_dev.tvnorms |= sdinfo->inputs[0].std;

- /* setup the supported formats & indexes */
- for (j = 0, i = 0; ; ++j) {
- struct vpfe_fmt *fmt;
- int ret;
-
+ vpfe->num_active_fmt = 0;
+ for (j = 0, i = 0; (ret != -EINVAL); ++j) {
memset(&mbus_code, 0, sizeof(mbus_code));
mbus_code.index = j;
mbus_code.which = V4L2_SUBDEV_FORMAT_ACTIVE;
ret = v4l2_subdev_call(subdev, pad, enum_mbus_code,
- NULL, &mbus_code);
+ NULL, &mbus_code);
if (ret)
- break;
-
- fmt = find_format_by_code(mbus_code.code);
- if (!fmt)
continue;

- fmt->supported = true;
- fmt->index = i++;
+ vpfe_dbg(3, vpfe,
+ "subdev %s: code: %04x idx: %d\n",
+ subdev->name, mbus_code.code, j);
+
+ for (k = 0; k < ARRAY_SIZE(formats); k++) {
+ fmt = &formats[k];
+ if (mbus_code.code != fmt->code)
+ continue;
+ vpfe->active_fmt[i] = fmt;
+ vpfe_dbg(3, vpfe,
+ "matched fourcc: %4.4s code: %04x idx: %d\n",
+ (char *)&fmt->fourcc, mbus_code.code, i);
+ vpfe->num_active_fmt = ++i;
+ }
}

+ if (!i) {
+ vpfe_err(vpfe, "No suitable format reported by subdev %s\n",
+ subdev->name);
+ return -EINVAL;
+ }
return 0;
}

diff --git a/drivers/media/platform/am437x/am437x-vpfe.h b/drivers/media/platform/am437x/am437x-vpfe.h
index 2dde09780215..6f25750f84e4 100644
--- a/drivers/media/platform/am437x/am437x-vpfe.h
+++ b/drivers/media/platform/am437x/am437x-vpfe.h
@@ -215,6 +215,37 @@ struct vpfe_ccdc {
u32 ccdc_ctx[VPFE_REG_END / sizeof(u32)];
};

+/*
+ * struct bus_format - VPFE bus format information
+ * @width: Bits per pixel (when transferred over a bus)
+ * @bpp: Bytes per pixel (when stored in memory)
+ */
+struct bus_format {
+ unsigned int width;
+ unsigned int bpp;
+};
+
+/*
+ * struct vpfe_fmt - VPFE media bus format information
+ * @fourcc: V4L2 pixel format code
+ * @code: V4L2 media bus format code
+ * @l: 10 bit bus format info
+ * @s: 8 bit bus format info
+ */
+struct vpfe_fmt {
+ u32 fourcc;
+ u32 code;
+ struct bus_format l;
+ struct bus_format s;
+};
+
+/*
+ * This value needs to be at least as large as the number of entry in
+ * formats[].
+ * When formats[] is modified make sure to adjust this value also.
+ */
+#define VPFE_MAX_ACTIVE_FMT 10
+
struct vpfe_device {
/* V4l2 specific parameters */
/* Identifies video device for this channel */
@@ -252,6 +283,9 @@ struct vpfe_device {
struct v4l2_format fmt;
/* Used to store current bytes per pixel based on current format */
unsigned int bpp;
+ struct vpfe_fmt *active_fmt[VPFE_MAX_ACTIVE_FMT];
+ unsigned int num_active_fmt;
+
/*
* used when IMP is chained to store the crop window which
* is different from the image window
--
2.17.1