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Subject[PATCH v8 9/9] media: imx-jpeg: Use v4l2 jpeg helpers in mxc-jpeg
Date
From: Mirela Rabulea <mirela.rabulea@nxp.com>

Use v4l2_jpeg_parse_header in mxc_jpeg_parse, remove the old
parsing way, which was duplicated in other jpeg drivers.

Signed-off-by: Mirela Rabulea <mirela.rabulea@nxp.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
---
Changes in v8:
Move the app14_tf fixup in mxc_jpeg_get_image_format() and let this function
return the correct format
Print subsampling and number of components in case fourcc couldn't be identified
Added Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>

drivers/media/platform/imx-jpeg/Kconfig | 1 +
drivers/media/platform/imx-jpeg/mxc-jpeg.c | 284 ++++++---------------
drivers/media/platform/imx-jpeg/mxc-jpeg.h | 26 +-
3 files changed, 92 insertions(+), 219 deletions(-)

diff --git a/drivers/media/platform/imx-jpeg/Kconfig b/drivers/media/platform/imx-jpeg/Kconfig
index 7cc89e5eff90..d875f7c88cda 100644
--- a/drivers/media/platform/imx-jpeg/Kconfig
+++ b/drivers/media/platform/imx-jpeg/Kconfig
@@ -4,6 +4,7 @@ config VIDEO_IMX8_JPEG
depends on VIDEO_DEV && VIDEO_V4L2
select VIDEOBUF2_DMA_CONTIG
select V4L2_MEM2MEM_DEV
+ select V4L2_JPEG_HELPER
default m
help
This is a video4linux2 driver for the i.MX8 QXP/QM integrated
diff --git a/drivers/media/platform/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/imx-jpeg/mxc-jpeg.c
index 109c04e222b4..65d30f30ed26 100644
--- a/drivers/media/platform/imx-jpeg/mxc-jpeg.c
+++ b/drivers/media/platform/imx-jpeg/mxc-jpeg.c
@@ -52,6 +52,7 @@
#include <linux/pm_domain.h>
#include <linux/string.h>

+#include <media/v4l2-jpeg.h>
#include <media/v4l2-mem2mem.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-common.h>
@@ -65,12 +66,16 @@ static struct mxc_jpeg_fmt mxc_formats[] = {
{
.name = "JPEG",
.fourcc = V4L2_PIX_FMT_JPEG,
+ .subsampling = -1,
+ .nc = -1,
.colplanes = 1,
.flags = MXC_JPEG_FMT_TYPE_ENC,
},
{
.name = "RGB", /*RGBRGB packed format*/
.fourcc = V4L2_PIX_FMT_RGB24,
+ .subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_444,
+ .nc = 3,
.depth = 24,
.colplanes = 1,
.h_align = 3,
@@ -80,6 +85,8 @@ static struct mxc_jpeg_fmt mxc_formats[] = {
{
.name = "ARGB", /* ARGBARGB packed format */
.fourcc = V4L2_PIX_FMT_ARGB32,
+ .subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_444,
+ .nc = 4,
.depth = 32,
.colplanes = 1,
.h_align = 3,
@@ -89,6 +96,8 @@ static struct mxc_jpeg_fmt mxc_formats[] = {
{
.name = "YUV420", /* 1st plane = Y, 2nd plane = UV */
.fourcc = V4L2_PIX_FMT_NV12,
+ .subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_420,
+ .nc = 3,
.depth = 12, /* 6 bytes (4Y + UV) for 4 pixels */
.colplanes = 2, /* 1 plane Y, 1 plane UV interleaved */
.h_align = 4,
@@ -98,6 +107,8 @@ static struct mxc_jpeg_fmt mxc_formats[] = {
{
.name = "YUV422", /* YUYV */
.fourcc = V4L2_PIX_FMT_YUYV,
+ .subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_422,
+ .nc = 3,
.depth = 16,
.colplanes = 1,
.h_align = 4,
@@ -107,6 +118,8 @@ static struct mxc_jpeg_fmt mxc_formats[] = {
{
.name = "YUV444", /* YUVYUV */
.fourcc = V4L2_PIX_FMT_YUV24,
+ .subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_444,
+ .nc = 3,
.depth = 24,
.colplanes = 1,
.h_align = 3,
@@ -116,6 +129,8 @@ static struct mxc_jpeg_fmt mxc_formats[] = {
{
.name = "Gray", /* Gray (Y8/Y12) or Single Comp */
.fourcc = V4L2_PIX_FMT_GREY,
+ .subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY,
+ .nc = 1,
.depth = 8,
.colplanes = 1,
.h_align = 3,
@@ -384,33 +399,6 @@ static enum mxc_jpeg_image_format mxc_jpeg_fourcc_to_imgfmt(u32 fourcc)
}
}

-static int mxc_jpeg_imgfmt_to_fourcc(enum mxc_jpeg_image_format imgfmt,
- u32 *fourcc)
-{
- switch (imgfmt) {
- case MXC_JPEG_GRAY:
- *fourcc = V4L2_PIX_FMT_GREY;
- return 0;
- case MXC_JPEG_YUV422:
- *fourcc = V4L2_PIX_FMT_YUYV;
- return 0;
- case MXC_JPEG_YUV420:
- *fourcc = V4L2_PIX_FMT_NV12;
- return 0;
- case MXC_JPEG_YUV444:
- *fourcc = V4L2_PIX_FMT_YUV24;
- return 0;
- case MXC_JPEG_RGB:
- *fourcc = V4L2_PIX_FMT_RGB24;
- return 0;
- case MXC_JPEG_ARGB:
- *fourcc = V4L2_PIX_FMT_ARGB32;
- return 0;
- default:
- return 1;
- }
-}
-
static struct mxc_jpeg_q_data *mxc_jpeg_get_q_data(struct mxc_jpeg_ctx *ctx,
enum v4l2_buf_type type)
{
@@ -1093,45 +1081,6 @@ static void mxc_jpeg_stop_streaming(struct vb2_queue *q)
}
}

-struct mxc_jpeg_stream {
- u8 *addr;
- u32 loc;
- u32 end;
-};
-
-static int get_byte(struct mxc_jpeg_stream *stream)
-{
- int ret;
-
- if (stream->loc >= stream->end)
- return -1;
- ret = stream->addr[stream->loc];
- stream->loc++;
- return ret;
-}
-
-static int get_sof(struct device *dev,
- struct mxc_jpeg_stream *stream,
- struct mxc_jpeg_sof *sof)
-{
- int i;
-
- if (stream->loc + sizeof(struct mxc_jpeg_sof) >= stream->end)
- return -1;
- memcpy(sof, &stream->addr[stream->loc], sizeof(struct mxc_jpeg_sof));
- _bswap16(&sof->length);
- _bswap16(&sof->height);
- _bswap16(&sof->width);
- dev_dbg(dev, "JPEG SOF: precision=%d\n", sof->precision);
- dev_dbg(dev, "JPEG SOF: height=%d, width=%d\n",
- sof->height, sof->width);
- for (i = 0; i < sof->components_no; i++) {
- dev_dbg(dev, "JPEG SOF: comp_id=%d, H=0x%x, V=0x%x\n",
- sof->comp[i].id, sof->comp[i].v, sof->comp[i].h);
- }
- return 0;
-}
-
static int mxc_jpeg_valid_comp_id(struct device *dev,
struct mxc_jpeg_sof *sof,
struct mxc_jpeg_sos *sos)
@@ -1161,45 +1110,37 @@ static int mxc_jpeg_valid_comp_id(struct device *dev,
return valid;
}

-static enum mxc_jpeg_image_format
-mxc_jpeg_get_image_format(struct device *dev, const struct mxc_jpeg_sof *sof)
+static u32 mxc_jpeg_get_image_format(struct device *dev,
+ const struct v4l2_jpeg_header header)
{
- if (sof->components_no == 1) {
- dev_dbg(dev, "IMAGE_FORMAT is: MXC_JPEG_GRAY\n");
- return MXC_JPEG_GRAY;
- }
- if (sof->components_no == 3) {
- if (sof->comp[0].h == 2 && sof->comp[0].v == 2 &&
- sof->comp[1].h == 1 && sof->comp[1].v == 1 &&
- sof->comp[2].h == 1 && sof->comp[2].v == 1){
- dev_dbg(dev, "IMAGE_FORMAT is: MXC_JPEG_YUV420\n");
- return MXC_JPEG_YUV420;
- }
- if (sof->comp[0].h == 2 && sof->comp[0].v == 1 &&
- sof->comp[1].h == 1 && sof->comp[1].v == 1 &&
- sof->comp[2].h == 1 && sof->comp[2].v == 1){
- dev_dbg(dev, "IMAGE_FORMAT is: MXC_JPEG_YUV422\n");
- return MXC_JPEG_YUV422;
- }
- if (sof->comp[0].h == 1 && sof->comp[0].v == 1 &&
- sof->comp[1].h == 1 && sof->comp[1].v == 1 &&
- sof->comp[2].h == 1 && sof->comp[2].v == 1){
- dev_dbg(dev, "IMAGE_FORMAT is: MXC_JPEG_YUV444\n");
- return MXC_JPEG_YUV444;
+ int i;
+ u32 fourcc = 0;
+
+ for (i = 0; i < MXC_JPEG_NUM_FORMATS; i++)
+ if (mxc_formats[i].subsampling == header.frame.subsampling &&
+ mxc_formats[i].nc == header.frame.num_components) {
+ fourcc = mxc_formats[i].fourcc;
+ break;
}
+ if (fourcc == 0) {
+ dev_err(dev, "Could not identify image format nc=%d, subsampling=%d\n",
+ header.frame.num_components,
+ header.frame.subsampling);
+ return fourcc;
}
- if (sof->components_no == 4) {
- if (sof->comp[0].h == 1 && sof->comp[0].v == 1 &&
- sof->comp[1].h == 1 && sof->comp[1].v == 1 &&
- sof->comp[2].h == 1 && sof->comp[2].v == 1 &&
- sof->comp[3].h == 1 && sof->comp[3].v == 1){
- /* this is not tested */
- dev_dbg(dev, "IMAGE_FORMAT is: MXC_JPEG_ARGB\n");
- return MXC_JPEG_ARGB;
- }
+ /*
+ * If the transform flag from APP14 marker is 0, images that are
+ * encoded with 3 components have RGB colorspace, see Recommendation
+ * ITU-T T.872 chapter 6.5.3 APP14 marker segment for colour encoding
+ */
+ if (fourcc == V4L2_PIX_FMT_YUV24 || fourcc == V4L2_PIX_FMT_RGB24) {
+ if (header.app14_tf == V4L2_JPEG_APP14_TF_CMYK_RGB)
+ fourcc = V4L2_PIX_FMT_RGB24;
+ else
+ fourcc = V4L2_PIX_FMT_YUV24;
}
- dev_err(dev, "Could not identify image format\n");
- return MXC_JPEG_INVALID;
+
+ return fourcc;
}

static void mxc_jpeg_bytesperline(struct mxc_jpeg_q_data *q,
@@ -1253,146 +1194,81 @@ static int mxc_jpeg_parse(struct mxc_jpeg_ctx *ctx,
struct device *dev = ctx->mxc_jpeg->dev;
struct mxc_jpeg_q_data *q_data_out, *q_data_cap;
enum v4l2_buf_type cap_type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
- struct mxc_jpeg_stream stream;
- bool notfound = true;
- bool app14 = false;
bool src_chg = false;
- u8 app14_transform = 0;
- struct mxc_jpeg_sof sof, *psof = NULL;
- struct mxc_jpeg_sos *psos = NULL;
- int byte;
- u8 *next = NULL;
- enum mxc_jpeg_image_format img_fmt;
u32 fourcc;
+ struct v4l2_jpeg_header header;
+ struct mxc_jpeg_sof *psof = NULL;
+ struct mxc_jpeg_sos *psos = NULL;
+ int ret;

- memset(&sof, 0, sizeof(struct mxc_jpeg_sof));
- stream.addr = src_addr;
- stream.end = size;
- stream.loc = 0;
- *dht_needed = true;
+ memset(&header, 0, sizeof(header));
+ ret = v4l2_jpeg_parse_header((void *)src_addr, size, &header);
+ if (ret < 0) {
+ dev_err(dev, "Error parsing JPEG stream markers\n");
+ return ret;
+ }

- /* check stream starts with SOI */
- byte = get_byte(&stream);
- if (byte == -1 || byte != 0xFF)
- return -EINVAL;
- byte = get_byte(&stream);
- if (byte == -1 || byte != 0xD8)
- return -EINVAL;
+ /* if DHT marker present, no need to inject default one */
+ *dht_needed = (header.num_dht == 0);

- while (notfound) {
- byte = get_byte(&stream);
- if (byte == -1)
- return -EINVAL;
- if (byte != 0xff)
- continue;
- do {
- byte = get_byte(&stream);
- } while (byte == 0xff);
- if (byte == -1)
- return false;
- if (byte == 0)
- continue;
- switch (byte) {
- case DHT:
- /* DHT marker present, no need to inject default one */
- *dht_needed = false;
- break;
- case SOF2: /* Progressive DCF frame definition */
- dev_err(dev,
- "Progressive JPEG not supported by hardware");
- return -EINVAL;
- case SOF1: /* Extended sequential DCF frame definition */
- case SOF0: /* Baseline sequential DCF frame definition */
- if (get_sof(dev, &stream, &sof) == -1)
- break;
- next = stream.addr + stream.loc;
- psof = (struct mxc_jpeg_sof *)next;
- break;
- case SOS:
- next = stream.addr + stream.loc;
- psos = (struct mxc_jpeg_sos *)next;
- notfound = false;
- break;
- case APP14:
- app14 = true;
- /*
- * Application Data Syntax is:
- * 2 bytes(APPn:0xFF,0xEE), 2 bytes(Lp), Ap1...ApLp-2
- * The transform flag is in Ap12
- * stream.loc is now on APPn-0xEE byte
- */
- app14_transform = *(stream.addr + stream.loc + 12 + 1);
- break;
- default:
- notfound = true;
- }
- }
q_data_out = mxc_jpeg_get_q_data(ctx,
V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
if (q_data_out->w == 0 && q_data_out->h == 0) {
dev_warn(dev, "Invalid user resolution 0x0");
dev_warn(dev, "Keeping resolution from JPEG: %dx%d",
- sof.width, sof.height);
- q_data_out->w = sof.width;
- q_data_out->h = sof.height;
- } else if (sof.width != q_data_out->w || sof.height != q_data_out->h) {
+ header.frame.width, header.frame.height);
+ q_data_out->w = header.frame.width;
+ q_data_out->h = header.frame.height;
+ } else if (header.frame.width != q_data_out->w ||
+ header.frame.height != q_data_out->h) {
dev_err(dev,
"Resolution mismatch: %dx%d (JPEG) versus %dx%d(user)",
- sof.width, sof.height, q_data_out->w, q_data_out->h);
+ header.frame.width, header.frame.height,
+ q_data_out->w, q_data_out->h);
return -EINVAL;
}
- if (sof.width % 8 != 0 || sof.height % 8 != 0) {
+ if (header.frame.width % 8 != 0 || header.frame.height % 8 != 0) {
dev_err(dev, "JPEG width or height not multiple of 8: %dx%d\n",
- sof.width, sof.height);
+ header.frame.width, header.frame.height);
return -EINVAL;
}
- if (sof.width > MXC_JPEG_MAX_WIDTH ||
- sof.height > MXC_JPEG_MAX_HEIGHT) {
+ if (header.frame.width > MXC_JPEG_MAX_WIDTH ||
+ header.frame.height > MXC_JPEG_MAX_HEIGHT) {
dev_err(dev, "JPEG width or height should be <= 8192: %dx%d\n",
- sof.width, sof.height);
+ header.frame.width, header.frame.height);
return -EINVAL;
}
- if (sof.width < MXC_JPEG_MIN_WIDTH ||
- sof.height < MXC_JPEG_MIN_HEIGHT) {
+ if (header.frame.width < MXC_JPEG_MIN_WIDTH ||
+ header.frame.height < MXC_JPEG_MIN_HEIGHT) {
dev_err(dev, "JPEG width or height should be > 64: %dx%d\n",
- sof.width, sof.height);
+ header.frame.width, header.frame.height);
return -EINVAL;
}
- if (sof.components_no > MXC_JPEG_MAX_COMPONENTS) {
+ if (header.frame.num_components > V4L2_JPEG_MAX_COMPONENTS) {
dev_err(dev, "JPEG number of components should be <=%d",
- MXC_JPEG_MAX_COMPONENTS);
+ V4L2_JPEG_MAX_COMPONENTS);
return -EINVAL;
}
/* check and, if necessary, patch component IDs*/
+ psof = (struct mxc_jpeg_sof *)header.sof.start;
+ psos = (struct mxc_jpeg_sos *)header.sos.start;
if (!mxc_jpeg_valid_comp_id(dev, psof, psos))
dev_warn(dev, "JPEG component ids should be 0-3 or 1-4");

- img_fmt = mxc_jpeg_get_image_format(dev, &sof);
- if (img_fmt == MXC_JPEG_INVALID)
- return -EINVAL;
-
- /*
- * If the transform flag from APP14 marker is 0, images that are
- * encoded with 3 components have RGB colorspace, see Recommendation
- * ITU-T T.872 chapter 6.5.3 APP14 marker segment for colour encoding
- */
- if (img_fmt == MXC_JPEG_YUV444 && app14 && app14_transform == 0)
- img_fmt = MXC_JPEG_RGB;
-
- if (mxc_jpeg_imgfmt_to_fourcc(img_fmt, &fourcc)) {
- dev_err(dev, "Fourcc not found for %d", img_fmt);
+ fourcc = mxc_jpeg_get_image_format(dev, header);
+ if (fourcc == 0)
return -EINVAL;
- }

/*
* set-up the capture queue with the pixelformat and resolution
* detected from the jpeg output stream
*/
q_data_cap = mxc_jpeg_get_q_data(ctx, cap_type);
- if (q_data_cap->w != sof.width || q_data_cap->h != sof.height)
+ if (q_data_cap->w != header.frame.width ||
+ q_data_cap->h != header.frame.height)
src_chg = true;
- q_data_cap->w = sof.width;
- q_data_cap->h = sof.height;
+ q_data_cap->w = header.frame.width;
+ q_data_cap->h = header.frame.height;
q_data_cap->fmt = mxc_jpeg_find_format(ctx, fourcc);
q_data_cap->w_adjusted = q_data_cap->w;
q_data_cap->h_adjusted = q_data_cap->h;
@@ -1418,7 +1294,7 @@ static int mxc_jpeg_parse(struct mxc_jpeg_ctx *ctx,
(fourcc >> 24) & 0xff);

/* setup bytesperline/sizeimage for capture queue */
- mxc_jpeg_bytesperline(q_data_cap, sof.precision);
+ mxc_jpeg_bytesperline(q_data_cap, header.frame.precision);
mxc_jpeg_sizeimage(q_data_cap);

/*
diff --git a/drivers/media/platform/imx-jpeg/mxc-jpeg.h b/drivers/media/platform/imx-jpeg/mxc-jpeg.h
index ef1670dafeb4..313b09f831a4 100644
--- a/drivers/media/platform/imx-jpeg/mxc-jpeg.h
+++ b/drivers/media/platform/imx-jpeg/mxc-jpeg.h
@@ -42,6 +42,8 @@ enum mxc_jpeg_mode {
* struct jpeg_fmt - driver's internal color format data
* @name: format description
* @fourcc: fourcc code, 0 if not applicable
+ * @subsampling subsampling of jpeg components
+ * @nc: number of color components
* @depth: number of bits per pixel
* @colplanes: number of color planes (1 for packed formats)
* @h_align: horizontal alignment order (align to 2^h_align)
@@ -49,13 +51,15 @@ enum mxc_jpeg_mode {
* @flags: flags describing format applicability
*/
struct mxc_jpeg_fmt {
- char *name;
- u32 fourcc;
- int depth;
- int colplanes;
- int h_align;
- int v_align;
- u32 flags;
+ char *name;
+ u32 fourcc;
+ enum v4l2_jpeg_chroma_subsampling subsampling;
+ int nc;
+ int depth;
+ int colplanes;
+ int h_align;
+ int v_align;
+ u32 flags;
};

struct mxc_jpeg_desc {
@@ -117,14 +121,6 @@ struct mxc_jpeg_dev {
struct device_link **pd_link;
};

-/* JPEG marker identifiers */
-#define SOF0 0xC0
-#define SOF1 0xC1
-#define SOF2 0xC2
-#define SOS 0xDA
-#define DHT 0xC4
-#define APP14 0xEE
-
/**
* struct mxc_jpeg_sof_comp - JPEG Start Of Frame component fields
* @id: component id
--
2.25.1
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