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Subject[RFC 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 | 67 ++++++++++++++++++++++++++++++++++++-
2 files changed, 76 insertions(+)

diff --git a/include/linux/image-formats.h b/include/linux/image-formats.h
index 53fd73a71b3d..fbc3a4501ebd 100644
--- a/include/linux/image-formats.h
+++ b/include/linux/image-formats.h
@@ -26,6 +26,13 @@ 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),
@@ -222,6 +229,8 @@ image_format_info_is_yuv_sampling_444(const struct image_format_info *info)

const struct image_format_info *__image_format_drm_lookup(u32 drm);
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_v4l2_lookup(u32 v4l2);
unsigned int image_format_plane_cpp(const struct image_format_info *format,
int plane);
unsigned int image_format_plane_width(int width,
diff --git a/lib/image-formats.c b/lib/image-formats.c
index 9b9a73220c5d..39f1d38ae861 100644
--- a/lib/image-formats.c
+++ b/lib/image-formats.c
@@ -8,6 +8,7 @@
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 },
@@ -15,6 +16,7 @@ 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 },
@@ -29,6 +31,7 @@ static const struct image_format_info formats[] = {
.vsub = 1,
}, {
.drm_fmt = DRM_FORMAT_XRGB4444,
+ .v4l2_fmt = V4L2_PIX_FMT_XRGB444,
.depth = 0,
.num_planes = 1,
.cpp = { 2, 0, 0 },
@@ -57,6 +60,7 @@ static const struct image_format_info formats[] = {
.vsub = 1,
}, {
.drm_fmt = DRM_FORMAT_ARGB4444,
+ .v4l2_fmt = V4L2_PIX_FMT_ARGB444,
.depth = 0,
.num_planes = 1,
.cpp = { 2, 0, 0 },
@@ -89,6 +93,7 @@ static const struct image_format_info formats[] = {
.has_alpha = true,
}, {
.drm_fmt = DRM_FORMAT_XRGB1555,
+ .v4l2_fmt = V4L2_PIX_FMT_XRGB555,
.depth = 15,
.num_planes = 1,
.cpp = { 2, 0, 0 },
@@ -117,6 +122,7 @@ static const struct image_format_info formats[] = {
.vsub = 1,
}, {
.drm_fmt = DRM_FORMAT_ARGB1555,
+ .v4l2_fmt = V4L2_PIX_FMT_ARGB555,
.depth = 15,
.num_planes = 1,
.cpp = { 2, 0, 0 },
@@ -149,6 +155,7 @@ static const struct image_format_info formats[] = {
.has_alpha = true,
}, {
.drm_fmt = DRM_FORMAT_RGB565,
+ .v4l2_fmt = V4L2_PIX_FMT_RGB565,
.depth = 16,
.num_planes = 1,
.cpp = { 2, 0, 0 },
@@ -163,6 +170,7 @@ static const struct image_format_info formats[] = {
.vsub = 1,
}, {
.drm_fmt = DRM_FORMAT_RGB888,
+ .v4l2_fmt = V4L2_PIX_FMT_RGB24,
.depth = 24,
.num_planes = 1,
.cpp = { 3, 0, 0 },
@@ -170,6 +178,7 @@ static const struct image_format_info formats[] = {
.vsub = 1,
}, {
.drm_fmt = DRM_FORMAT_BGR888,
+ .v4l2_fmt = V4L2_PIX_FMT_BGR24,
.depth = 24,
.num_planes = 1,
.cpp = { 3, 0, 0 },
@@ -177,6 +186,7 @@ static const struct image_format_info formats[] = {
.vsub = 1,
}, {
.drm_fmt = DRM_FORMAT_XRGB8888,
+ .v4l2_fmt = V4L2_PIX_FMT_XRGB32,
.depth = 24,
.num_planes = 1,
.cpp = { 4, 0, 0 },
@@ -281,6 +291,7 @@ static const struct image_format_info formats[] = {
.has_alpha = true,
}, {
.drm_fmt = DRM_FORMAT_ARGB8888,
+ .v4l2_fmt = V4L2_PIX_FMT_ARGB32,
.depth = 32,
.num_planes = 1,
.cpp = { 4, 0, 0 },
@@ -361,6 +372,7 @@ 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 },
@@ -369,6 +381,7 @@ 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 },
@@ -393,6 +406,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YUV420,
+ .v4l2_fmt = V4L2_PIX_FMT_YUV420M,
.depth = 0,
.num_planes = 3,
.cpp = { 1, 1, 1 },
@@ -401,6 +415,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YVU420,
+ .v4l2_fmt = V4L2_PIX_FMT_YVU420M,
.depth = 0,
.num_planes = 3,
.cpp = { 1, 1, 1 },
@@ -409,6 +424,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YUV422,
+ .v4l2_fmt = V4L2_PIX_FMT_YUV422M,
.depth = 0,
.num_planes = 3,
.cpp = { 1, 1, 1 },
@@ -417,6 +433,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YVU422,
+ .v4l2_fmt = V4L2_PIX_FMT_YVU422M,
.depth = 0,
.num_planes = 3,
.cpp = { 1, 1, 1 },
@@ -425,6 +442,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YUV444,
+ .v4l2_fmt = V4L2_PIX_FMT_YUV444M,
.depth = 0,
.num_planes = 3,
.cpp = { 1, 1, 1 },
@@ -433,6 +451,7 @@ static const struct image_format_info formats[] = {
.is_yuv = true,
}, {
.drm_fmt = DRM_FORMAT_YVU444,
+ .v4l2_fmt = V4L2_PIX_FMT_YVU444M,
.depth = 0,
.num_planes = 3,
.cpp = { 1, 1, 1 },
@@ -441,6 +460,7 @@ 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 },
@@ -449,6 +469,7 @@ 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 },
@@ -457,6 +478,7 @@ 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 },
@@ -465,6 +487,7 @@ 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 },
@@ -473,6 +496,7 @@ 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 },
@@ -481,6 +505,7 @@ 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 },
@@ -489,6 +514,7 @@ 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 },
@@ -497,6 +523,7 @@ 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 },
@@ -505,6 +532,7 @@ 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 },
@@ -513,6 +541,7 @@ 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 },
@@ -632,6 +661,44 @@ const struct image_format_info *image_format_drm_lookup(u32 drm)
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);
+
+/**
* image_format_plane_cpp - determine the bytes per pixel value
* @format: pointer to the image_format
* @plane: plane index
--
git-series 0.9.1
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