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Subject[PATCH 18/20] lib: image-formats: Add v4l2 formats support
Date
V4L2 uses different fourcc's than DRM, and has a different set of formats.
For now, let's add the v4l2 fourcc's for the already existing formats.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
include/linux/image-formats.h | 9 +++++-
lib/image-formats.c | 62 ++++++++++++++++++++++++++++++++++++-
2 files changed, 71 insertions(+)

diff --git a/include/linux/image-formats.h b/include/linux/image-formats.h
index ec43d9f9a527..b78b8e861fc9 100644
--- a/include/linux/image-formats.h
+++ b/include/linux/image-formats.h
@@ -50,6 +50,13 @@ struct image_format_info {
};

/**
+ * @v4l2_fmt:
+ *
+ * V4L2 4CC format identifier (V4L2_PIX_FMT_*)
+ */
+ u32 v4l2_fmt;
+
+ /**
* @depth:
*
* Color depth (number of bits per pixel excluding padding bits),
@@ -382,6 +389,8 @@ uint64_t image_format_info_min_pitch(const struct image_format_info *info,
}

const struct image_format_info *__image_format_drm_lookup(u32 drm);
+const struct image_format_info *__image_format_v4l2_lookup(u32 v4l2);
const struct image_format_info *image_format_drm_lookup(u32 drm);
+const struct image_format_info *image_format_v4l2_lookup(u32 v4l2);

#endif /* _IMAGE_FORMATS_H_ */
diff --git a/lib/image-formats.c b/lib/image-formats.c
index 1e52a7410222..25fa22d243fb 100644
--- a/lib/image-formats.c
+++ b/lib/image-formats.c
@@ -25,12 +25,14 @@
#include <linux/image-formats.h>
#include <linux/kernel.h>
#include <linux/math64.h>
+#include <linux/videodev2.h>

#include <uapi/drm/drm_fourcc.h>

static const struct image_format_info formats[] = {
{
.drm_fmt = DRM_FORMAT_C8,
+ .v4l2_fmt = V4L2_PIX_FMT_GREY,
.depth = 8,
.num_planes = 1,
.cpp = { 1, 0, 0 },
@@ -38,6 +40,7 @@ static const struct image_format_info formats[] = {
.vsub = 1,
}, {
.drm_fmt = DRM_FORMAT_RGB332,
+ .v4l2_fmt = V4L2_PIX_FMT_RGB332,
.depth = 8,
.num_planes = 1,
.cpp = { 1, 0, 0 },
@@ -172,6 +175,7 @@ static const struct image_format_info formats[] = {
.has_alpha = true,
}, {
.drm_fmt = DRM_FORMAT_RGB565,
+ .v4l2_fmt = V4L2_PIX_FMT_RGB565X,
.depth = 16,
.num_planes = 1,
.cpp = { 2, 0, 0 },
@@ -186,6 +190,7 @@ static const struct image_format_info formats[] = {
.vsub = 1,
}, {
.drm_fmt = DRM_FORMAT_RGB888,
+ .v4l2_fmt = V4L2_PIX_FMT_BGR24,
.depth = 24,
.num_planes = 1,
.cpp = { 3, 0, 0 },
@@ -193,6 +198,7 @@ static const struct image_format_info formats[] = {
.vsub = 1,
}, {
.drm_fmt = DRM_FORMAT_BGR888,
+ .v4l2_fmt = V4L2_PIX_FMT_RGB24,
.depth = 24,
.num_planes = 1,
.cpp = { 3, 0, 0 },
@@ -200,6 +206,7 @@ static const struct image_format_info formats[] = {
.vsub = 1,
}, {
.drm_fmt = DRM_FORMAT_XRGB8888,
+ .v4l2_fmt = V4L2_PIX_FMT_XBGR32,
.depth = 24,
.num_planes = 1,
.cpp = { 4, 0, 0 },
@@ -304,6 +311,7 @@ static const struct image_format_info formats[] = {
.has_alpha = true,
}, {
.drm_fmt = DRM_FORMAT_ARGB8888,
+ .v4l2_fmt = V4L2_PIX_FMT_ABGR32,
.depth = 32,
.num_planes = 1,
.cpp = { 4, 0, 0 },
@@ -384,6 +392,7 @@ static const struct image_format_info formats[] = {
.has_alpha = true,
}, {
.drm_fmt = DRM_FORMAT_YUV410,
+ .v4l2_fmt = V4L2_PIX_FMT_YUV410,
.depth = 0,
.num_planes = 3,
.cpp = { 1, 1, 1 },
@@ -392,6 +401,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YVU410,
+ .v4l2_fmt = V4L2_PIX_FMT_YVU410,
.depth = 0,
.num_planes = 3,
.cpp = { 1, 1, 1 },
@@ -416,6 +426,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YUV420,
+ .v4l2_fmt = V4L2_PIX_FMT_YUV420,
.depth = 0,
.num_planes = 3,
.cpp = { 1, 1, 1 },
@@ -424,6 +435,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YVU420,
+ .v4l2_fmt = V4L2_PIX_FMT_YVU420,
.depth = 0,
.num_planes = 3,
.cpp = { 1, 1, 1 },
@@ -432,6 +444,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YUV422,
+ .v4l2_fmt = V4L2_PIX_FMT_YUV422P,
.depth = 0,
.num_planes = 3,
.cpp = { 1, 1, 1 },
@@ -448,6 +461,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YUV444,
+ .v4l2_fmt = V4L2_PIX_FMT_YUV444,
.depth = 0,
.num_planes = 3,
.cpp = { 1, 1, 1 },
@@ -464,6 +478,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_NV12,
+ .v4l2_fmt = V4L2_PIX_FMT_NV12,
.depth = 0,
.num_planes = 2,
.cpp = { 1, 2, 0 },
@@ -472,6 +487,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_NV21,
+ .v4l2_fmt = V4L2_PIX_FMT_NV21,
.depth = 0,
.num_planes = 2,
.cpp = { 1, 2, 0 },
@@ -480,6 +496,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_NV16,
+ .v4l2_fmt = V4L2_PIX_FMT_NV16,
.depth = 0,
.num_planes = 2,
.cpp = { 1, 2, 0 },
@@ -488,6 +505,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_NV61,
+ .v4l2_fmt = V4L2_PIX_FMT_NV61,
.depth = 0,
.num_planes = 2,
.cpp = { 1, 2, 0 },
@@ -496,6 +514,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_NV24,
+ .v4l2_fmt = V4L2_PIX_FMT_NV24,
.depth = 0,
.num_planes = 2,
.cpp = { 1, 2, 0 },
@@ -504,6 +523,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_NV42,
+ .v4l2_fmt = V4L2_PIX_FMT_NV42,
.depth = 0,
.num_planes = 2,
.cpp = { 1, 2, 0 },
@@ -512,6 +532,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YUYV,
+ .v4l2_fmt = V4L2_PIX_FMT_YUYV,
.depth = 0,
.num_planes = 1,
.cpp = { 2, 0, 0 },
@@ -520,6 +541,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YVYU,
+ .v4l2_fmt = V4L2_PIX_FMT_YVYU,
.depth = 0,
.num_planes = 1,
.cpp = { 2, 0, 0 },
@@ -528,6 +550,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_UYVY,
+ .v4l2_fmt = V4L2_PIX_FMT_UYVY,
.depth = 0,
.num_planes = 1,
.cpp = { 2, 0, 0 },
@@ -536,6 +559,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_VYUY,
+ .v4l2_fmt = V4L2_PIX_FMT_VYUY,
.depth = 0,
.num_planes = 1,
.cpp = { 2, 0, 0 },
@@ -653,3 +677,41 @@ const struct image_format_info *image_format_drm_lookup(u32 drm)
return format;
}
EXPORT_SYMBOL(image_format_drm_lookup);
+
+/**
+ * __image_format_v4l2_lookup - query information for a given format
+ * @v4l2: V4L2 fourcc pixel format (V4L2_PIX_FMT_*)
+ *
+ * The caller should only pass a supported pixel format to this function.
+ *
+ * Returns:
+ * The instance of struct image_format_info that describes the pixel format, or
+ * NULL if the format is unsupported.
+ */
+const struct image_format_info *__image_format_v4l2_lookup(u32 v4l2)
+{
+ return __image_format_lookup(v4l2_fmt, v4l2);
+}
+EXPORT_SYMBOL(__image_format_v4l2_lookup);
+
+/**
+ * image_format_v4l2_lookup - query information for a given format
+ * @v4l2: V4L2 fourcc pixel format (V4L2_PIX_FMT_*)
+ *
+ * The caller should only pass a supported pixel format to this function.
+ * Unsupported pixel formats will generate a warning in the kernel log.
+ *
+ * Returns:
+ * The instance of struct image_format_info that describes the pixel format, or
+ * NULL if the format is unsupported.
+ */
+const struct image_format_info *image_format_v4l2_lookup(u32 v4l2)
+{
+ const struct image_format_info *format;
+
+ format = __image_format_v4l2_lookup(v4l2);
+
+ WARN_ON(!format);
+ return format;
+}
+EXPORT_SYMBOL(image_format_v4l2_lookup);
--
git-series 0.9.1
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