From: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
The imx_media_pixfmt structures include a codes member that stores
media bus codes as a fixed array of 4 integers. The functions dealing
with the imx_media_pixfmt structures assume that the array of codes is
terminated by a 0 element. This mechanism is fragile, as demonstrated
by several instances of the structure containing 4 non-zero codes.
Fix this by turning the array into a pointer, and providing an
IMX_BUS_FMTS macro to initialize the codes member with a guaranteed 0
element at the end.
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
[Fixed a NULL deref of the codes pointer in a couple places]
[Added more comments for the struct imx_media_pixfmt members,
including a bold NOTE! for future developers that codes pointer
is NULL for the in-memory-only formats]
Signed-off-by: Steve Longerbeam <slongerbeam@xxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
drivers/staging/media/imx/imx-media-capture.c | 4 +-
drivers/staging/media/imx/imx-media-utils.c | 74 ++++++++++---------
drivers/staging/media/imx/imx-media.h | 7 +-
3 files changed, 46 insertions(+), 39 deletions(-)
diff --git a/drivers/staging/media/imx/imx-media-capture.c b/drivers/staging/media/imx/imx-media-capture.c
index a7211ccc21e1..4b4ee81ad2e8 100644
--- a/drivers/staging/media/imx/imx-media-capture.c
+++ b/drivers/staging/media/imx/imx-media-capture.c
@@ -95,7 +95,7 @@ static int capture_enum_framesizes(struct file *file, void *fh,
if (!cc)
return -EINVAL;
- fse.code = cc->codes[0];
+ fse.code = cc->codes ? cc->codes[0] : 0;
ret = v4l2_subdev_call(priv->src_sd, pad, enum_frame_size, NULL, &fse);
if (ret)
@@ -137,7 +137,7 @@ static int capture_enum_frameintervals(struct file *file, void *fh,
if (!cc)
return -EINVAL;
- fie.code = cc->codes[0];
+ fie.code = cc->codes ? cc->codes[0] : 0;
ret = v4l2_subdev_call(priv->src_sd, pad, enum_frame_interval,
NULL, &fie);
diff --git a/drivers/staging/media/imx/imx-media-utils.c b/drivers/staging/media/imx/imx-media-utils.c
index 7566e0ae5e81..8d88c2a8df64 100644
--- a/drivers/staging/media/imx/imx-media-utils.c
+++ b/drivers/staging/media/imx/imx-media-utils.c
@@ -7,6 +7,8 @@
#include <linux/module.h>
#include "imx-media.h"
+#define IMX_BUS_FMTS(fmt...) (const u32[]) {fmt, 0}
+
/*
* List of supported pixel formats for the subdevs.
*/
@@ -14,18 +16,18 @@ static const struct imx_media_pixfmt pixel_formats[] = {
/*** YUV formats start here ***/
{
.fourcc = V4L2_PIX_FMT_UYVY,
- .codes = {
+ .codes = IMX_BUS_FMTS(
MEDIA_BUS_FMT_UYVY8_2X8,
MEDIA_BUS_FMT_UYVY8_1X16
- },
+ ),
.cs = IPUV3_COLORSPACE_YUV,
.bpp = 16,
}, {
.fourcc = V4L2_PIX_FMT_YUYV,
- .codes = {
+ .codes = IMX_BUS_FMTS(
MEDIA_BUS_FMT_YUYV8_2X8,
MEDIA_BUS_FMT_YUYV8_1X16
- },
+ ),
.cs = IPUV3_COLORSPACE_YUV,
.bpp = 16,
}, {
@@ -55,7 +57,7 @@ static const struct imx_media_pixfmt pixel_formats[] = {
.planar = true,
}, {
.fourcc = V4L2_PIX_FMT_YUV32,
- .codes = {MEDIA_BUS_FMT_AYUV8_1X32},
+ .codes = IMX_BUS_FMTS(MEDIA_BUS_FMT_AYUV8_1X32),
.cs = IPUV3_COLORSPACE_YUV,
.bpp = 32,
.ipufmt = true,
@@ -63,16 +65,16 @@ static const struct imx_media_pixfmt pixel_formats[] = {
/*** RGB formats start here ***/
{
.fourcc = V4L2_PIX_FMT_RGB565,
- .codes = {MEDIA_BUS_FMT_RGB565_2X8_LE},
+ .codes = IMX_BUS_FMTS(MEDIA_BUS_FMT_RGB565_2X8_LE),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 16,
.cycles = 2,
}, {
.fourcc = V4L2_PIX_FMT_RGB24,
- .codes = {
+ .codes = IMX_BUS_FMTS(
MEDIA_BUS_FMT_RGB888_1X24,
MEDIA_BUS_FMT_RGB888_2X12_LE
- },
+ ),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 24,
}, {
@@ -81,12 +83,12 @@ static const struct imx_media_pixfmt pixel_formats[] = {
.bpp = 24,
}, {
.fourcc = V4L2_PIX_FMT_XRGB32,
- .codes = {MEDIA_BUS_FMT_ARGB8888_1X32},
+ .codes = IMX_BUS_FMTS(MEDIA_BUS_FMT_ARGB8888_1X32),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 32,
}, {
.fourcc = V4L2_PIX_FMT_XRGB32,
- .codes = {MEDIA_BUS_FMT_ARGB8888_1X32},
+ .codes = IMX_BUS_FMTS(MEDIA_BUS_FMT_ARGB8888_1X32),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 32,
.ipufmt = true,
@@ -106,91 +108,91 @@ static const struct imx_media_pixfmt pixel_formats[] = {
/*** raw bayer and grayscale formats start here ***/
{
.fourcc = V4L2_PIX_FMT_SBGGR8,
- .codes = {MEDIA_BUS_FMT_SBGGR8_1X8},
+ .codes = IMX_BUS_FMTS(MEDIA_BUS_FMT_SBGGR8_1X8),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 8,
.bayer = true,
}, {
.fourcc = V4L2_PIX_FMT_SGBRG8,
- .codes = {MEDIA_BUS_FMT_SGBRG8_1X8},
+ .codes = IMX_BUS_FMTS(MEDIA_BUS_FMT_SGBRG8_1X8),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 8,
.bayer = true,
}, {
.fourcc = V4L2_PIX_FMT_SGRBG8,
- .codes = {MEDIA_BUS_FMT_SGRBG8_1X8},
+ .codes = IMX_BUS_FMTS(MEDIA_BUS_FMT_SGRBG8_1X8),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 8,
.bayer = true,
}, {
.fourcc = V4L2_PIX_FMT_SRGGB8,
- .codes = {MEDIA_BUS_FMT_SRGGB8_1X8},
+ .codes = IMX_BUS_FMTS(MEDIA_BUS_FMT_SRGGB8_1X8),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 8,
.bayer = true,
}, {
.fourcc = V4L2_PIX_FMT_SBGGR16,
- .codes = {
+ .codes = IMX_BUS_FMTS(
MEDIA_BUS_FMT_SBGGR10_1X10,
MEDIA_BUS_FMT_SBGGR12_1X12,
MEDIA_BUS_FMT_SBGGR14_1X14,
MEDIA_BUS_FMT_SBGGR16_1X16
- },
+ ),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 16,
.bayer = true,
}, {
.fourcc = V4L2_PIX_FMT_SGBRG16,
- .codes = {
+ .codes = IMX_BUS_FMTS(
MEDIA_BUS_FMT_SGBRG10_1X10,
MEDIA_BUS_FMT_SGBRG12_1X12,
MEDIA_BUS_FMT_SGBRG14_1X14,
- MEDIA_BUS_FMT_SGBRG16_1X16,
- },
+ MEDIA_BUS_FMT_SGBRG16_1X16
+ ),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 16,
.bayer = true,
}, {
.fourcc = V4L2_PIX_FMT_SGRBG16,
- .codes = {
+ .codes = IMX_BUS_FMTS(
MEDIA_BUS_FMT_SGRBG10_1X10,
MEDIA_BUS_FMT_SGRBG12_1X12,
MEDIA_BUS_FMT_SGRBG14_1X14,
- MEDIA_BUS_FMT_SGRBG16_1X16,
- },
+ MEDIA_BUS_FMT_SGRBG16_1X16
+ ),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 16,
.bayer = true,
}, {
.fourcc = V4L2_PIX_FMT_SRGGB16,
- .codes = {
+ .codes = IMX_BUS_FMTS(
MEDIA_BUS_FMT_SRGGB10_1X10,
MEDIA_BUS_FMT_SRGGB12_1X12,
MEDIA_BUS_FMT_SRGGB14_1X14,
- MEDIA_BUS_FMT_SRGGB16_1X16,
- },
+ MEDIA_BUS_FMT_SRGGB16_1X16
+ ),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 16,
.bayer = true,
}, {
.fourcc = V4L2_PIX_FMT_GREY,
- .codes = {
+ .codes = IMX_BUS_FMTS(
MEDIA_BUS_FMT_Y8_1X8,
MEDIA_BUS_FMT_Y10_1X10,
- MEDIA_BUS_FMT_Y12_1X12,
- },
+ MEDIA_BUS_FMT_Y12_1X12
+ ),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 8,
.bayer = true,
}, {
.fourcc = V4L2_PIX_FMT_Y10,
- .codes = {MEDIA_BUS_FMT_Y10_1X10},
+ .codes = IMX_BUS_FMTS(MEDIA_BUS_FMT_Y10_1X10),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 16,
.bayer = true,
}, {
.fourcc = V4L2_PIX_FMT_Y12,
- .codes = {MEDIA_BUS_FMT_Y12_1X12},
+ .codes = IMX_BUS_FMTS(MEDIA_BUS_FMT_Y12_1X12),
.cs = IPUV3_COLORSPACE_RGB,
.bpp = 16,
.bayer = true,
@@ -220,16 +222,16 @@ static const struct imx_media_pixfmt *find_format(u32 fourcc,
PIXFMT_SEL_YUV : PIXFMT_SEL_RGB);
if (!(fmt_sel & sel) ||
- (!allow_non_mbus && !fmt->codes[0]))
+ (!allow_non_mbus && !fmt->codes))
continue;
if (fourcc && fmt->fourcc == fourcc)
return fmt;
- if (!code)
+ if (!code || !fmt->codes)
continue;
- for (j = 0; j < ARRAY_SIZE(fmt->codes) && fmt->codes[j]; j++) {
+ for (j = 0; fmt->codes[j]; j++) {
if (code == fmt->codes[j])
return fmt;
}
@@ -260,7 +262,7 @@ static int enum_format(u32 *fourcc, u32 *code, u32 index,
PIXFMT_SEL_YUV : PIXFMT_SEL_RGB);
if (!(fmt_sel & sel) ||
- (!allow_non_mbus && !fmt->codes[0]))
+ (!allow_non_mbus && !fmt->codes))
continue;
if (fourcc && index == 0) {
@@ -273,7 +275,7 @@ static int enum_format(u32 *fourcc, u32 *code, u32 index,
continue;
}
- for (j = 0; j < ARRAY_SIZE(fmt->codes) && fmt->codes[j]; j++) {
+ for (j = 0; fmt->codes[j]; j++) {
if (index == 0) {
*code = fmt->codes[j];
return 0;
@@ -532,7 +534,7 @@ int imx_media_ipu_image_to_mbus_fmt(struct v4l2_mbus_framefmt *mbus,
const struct imx_media_pixfmt *fmt;
fmt = imx_media_find_format(image->pix.pixelformat, PIXFMT_SEL_ANY);
- if (!fmt)
+ if (!fmt || !fmt->codes || !fmt->codes[0])
return -EINVAL;
memset(mbus, 0, sizeof(*mbus));
diff --git a/drivers/staging/media/imx/imx-media.h b/drivers/staging/media/imx/imx-media.h
index c61592750729..459ec15bcdaf 100644
--- a/drivers/staging/media/imx/imx-media.h
+++ b/drivers/staging/media/imx/imx-media.h
@@ -68,8 +68,13 @@ enum {
#define IMX_MEDIA_EOF_TIMEOUT 1000
struct imx_media_pixfmt {
+ /* the in-memory FourCC pixel format */
u32 fourcc;
- u32 codes[4];
+ /*
+ * the set of equivalent media bus codes for the fourcc.
+ * NOTE! codes pointer is NULL for in-memory-only formats.
+ */
+ const u32 *codes;
int bpp; /* total bpp */
/* cycles per pixel for generic (bayer) formats for the parallel bus */
int cycles;
--
2.17.1
