@@ -288,6 +288,62 @@ extern "C" {
/* Compressed formats */
#define DRM_FORMAT_MJPEG fourcc_code('M', 'J', 'P', 'G') /* Motion-JPEG */
+/*
+ * Bayer formats
+ *
+ * Bayer formats contain green, red and blue components, with alternating lines
+ * of red and green, and blue and green pixels in different orders. For each
+ * block of 2x2 pixels there is one pixel with a red filter, two with a green
+ * filter, and one with a blue filter. The filters can be arranged in different
+ * patterns.
+ *
+ * For example, RGGB:
+ * row0: RGRGRGRG...
+ * row1: GBGBGBGB...
+ * row3: RGRGRGRG...
+ * row4: GBGBGBGB...
+ * ...
+ *
+ * Vendors have different methods to pack the sampling formats to increase data
+ * density. For this reason the fourcc only describes pixel sample size and the
+ * filter pattern for each block of 2x2 pixels. A modifier is needed to
+ * describe the memory layout.
+ *
+ * In addition to vendor modifiers for memory layout DRM_FORMAT_MOD_LINEAR may
+ * be used to describe a layout where all samples are placed consecutively in
+ * memory. If the sample does not fit inside a single byte, the sample storage
+ * is extended to the minimum number of (little endian) bytes that can hold the
+ * sample and any unused most-significant bits are defined as padding.
+ *
+ * For example, SRGGB10:
+ * Each 10-bit sample is contained in 2 consecutive little endian bytes, where
+ * the 6 most-significant bits are unused.
+ */
+
+/* 8-bit Bayer formats */
+#define DRM_FORMAT_SRGGB8 fourcc_code('R', 'G', 'G', 'B')
+#define DRM_FORMAT_SGRBG8 fourcc_code('G', 'R', 'B', 'G')
+#define DRM_FORMAT_SGBRG8 fourcc_code('G', 'B', 'R', 'G')
+#define DRM_FORMAT_SBGGR8 fourcc_code('B', 'A', '8', '1')
+
+/* 10-bit Bayer formats */
+#define DRM_FORMAT_SRGGB10 fourcc_code('R', 'G', '1', '0')
+#define DRM_FORMAT_SGRBG10 fourcc_code('B', 'A', '1', '0')
+#define DRM_FORMAT_SGBRG10 fourcc_code('G', 'B', '1', '0')
+#define DRM_FORMAT_SBGGR10 fourcc_code('B', 'G', '1', '0')
+
+/* 12-bit Bayer formats */
+#define DRM_FORMAT_SRGGB12 fourcc_code('R', 'G', '1', '2')
+#define DRM_FORMAT_SGRBG12 fourcc_code('B', 'A', '1', '2')
+#define DRM_FORMAT_SGBRG12 fourcc_code('G', 'B', '1', '2')
+#define DRM_FORMAT_SBGGR12 fourcc_code('B', 'G', '1', '2')
+
+/* 14-bit Bayer formats */
+#define DRM_FORMAT_SRGGB14 fourcc_code('R', 'G', '1', '4')
+#define DRM_FORMAT_SGRBG14 fourcc_code('B', 'A', '1', '4')
+#define DRM_FORMAT_SGBRG14 fourcc_code('G', 'B', '1', '4')
+#define DRM_FORMAT_SBGGR14 fourcc_code('B', 'G', '1', '4')
+
/*
* Format Modifiers:
*
@@ -311,6 +367,7 @@ extern "C" {
#define DRM_FORMAT_MOD_VENDOR_BROADCOM 0x07
#define DRM_FORMAT_MOD_VENDOR_ARM 0x08
#define DRM_FORMAT_MOD_VENDOR_ALLWINNER 0x09
+#define DRM_FORMAT_MOD_VENDOR_MIPI 0x0a
/* add more to the end as needed */
@@ -412,6 +469,16 @@ extern "C" {
#define I915_FORMAT_MOD_Y_TILED_CCS fourcc_mod_code(INTEL, 4)
#define I915_FORMAT_MOD_Yf_TILED_CCS fourcc_mod_code(INTEL, 5)
+/*
+ * IPU3 Bayer packing layout
+ *
+ * The IPU3 raw Bayer formats use a custom packing layout where there are no
+ * gaps between each 10-bit sample. It packs 25 pixels into 32 bytes leaving
+ * the 6 most significant bits in the last byte unused. The format is little
+ * endian.
+ */
+#define IPU3_FORMAT_MOD_PACKED fourcc_mod_code(INTEL, 8)
+
/*
* Tiled, NV12MT, grouped in 64 (pixels) x 32 (lines) -sized macroblocks
*
@@ -758,6 +825,33 @@ extern "C" {
*/
#define DRM_FORMAT_MOD_ALLWINNER_TILED fourcc_mod_code(ALLWINNER, 1)
+/* Mobile Industry Processor Interface (MIPI) modifiers */
+
+/*
+ * MIPI CSI-2 packing layout
+ *
+ * The CSI-2 RAW formats (for example Bayer) use a different packing layout
+ * depenindg on the sample size.
+ *
+ * - 10-bits per sample
+ * Every four consecutive samples are packed into 5 bytes. Each of the first 4
+ * bytes contain the 8 high order bits of the pixels, and the 5th byte
+ * contains the 2 least-significant bits of each pixel, in the same order.
+ *
+ * - 12-bits per sample
+ * Every two consecutive samples are packed into three bytes. Each of the
+ * first two bytes contain the 8 high order bits of the pixels, and the third
+ * byte contains the four least-significant bits of each pixel, in the same
+ * order.
+ *
+ * - 14-bits per sample
+ * Every four consecutive samples are packed into seven bytes. Each of the
+ * first four bytes contain the eight high order bits of the pixels, and the
+ * three following bytes contains the six least-significant bits of each
+ * pixel, in the same order.
+ */
+#define MIPI_FORMAT_MOD_CSI2_PACKED fourcc_mod_code(MIPI, 1)
+
#if defined(__cplusplus)
}
#endif
Add Bayer format and modifiers for patch submitted for upstream inclusion. The formats have not been accepted upstream yet so should not yet be merged i libcamera. The formats is however needed to demonstrate RAW capture on the IPU3 pipeline. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> --- include/linux/drm_fourcc.h | 94 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+)