[PATCH 03/10] platform/raspberrypi: vchiq-mmal: Support bayer and gray formats

[Jai Luthra]

Raw camera sensors often send data as packed or unpacked bayer and gray
formats, which needs to be processed by the ISP.

Add macros to support bayer and gray format FOURCCs in the MMAL layer.

Signed-off-by: Jai Luthra <jai.luthra at ideasonboard.com>
---
 include/linux/raspberrypi/mmal-encodings.h | 64 ++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/include/linux/raspberrypi/mmal-encodings.h b/include/linux/raspberrypi/mmal-encodings.h
index eadf2e9814082c861a93ae8119e8ecb27a2fb331..1e13ebbaebf607a2eb82695c65c00bc1e901f745 100644
--- a/include/linux/raspberrypi/mmal-encodings.h
+++ b/include/linux/raspberrypi/mmal-encodings.h
@@ -69,6 +69,70 @@
  */
 #define MMAL_ENCODING_OPAQUE           MMAL_FOURCC('O', 'P', 'Q', 'V')
 
+/**
+ * Bayer formats
+ * FourCC values copied from V4L2 where defined.
+ */
+/* 8 bit per pixel Bayer formats. */
+#define MMAL_ENCODING_BAYER_SBGGR8     MMAL_FOURCC('B', 'A', '8', '1')
+#define MMAL_ENCODING_BAYER_SGBRG8     MMAL_FOURCC('G', 'B', 'R', 'G')
+#define MMAL_ENCODING_BAYER_SGRBG8     MMAL_FOURCC('G', 'R', 'B', 'G')
+#define MMAL_ENCODING_BAYER_SRGGB8     MMAL_FOURCC('R', 'G', 'G', 'B')
+
+/* 10 bit per pixel packed Bayer formats. */
+#define MMAL_ENCODING_BAYER_SBGGR10P   MMAL_FOURCC('p', 'B', 'A', 'A')
+#define MMAL_ENCODING_BAYER_SGRBG10P   MMAL_FOURCC('p', 'g', 'A', 'A')
+#define MMAL_ENCODING_BAYER_SGBRG10P   MMAL_FOURCC('p', 'G', 'A', 'A')
+#define MMAL_ENCODING_BAYER_SRGGB10P   MMAL_FOURCC('p', 'R', 'A', 'A')
+
+/* 12 bit per pixel packed Bayer formats. */
+#define MMAL_ENCODING_BAYER_SBGGR12P   MMAL_FOURCC('p', 'B', '1', '2')
+#define MMAL_ENCODING_BAYER_SGRBG12P   MMAL_FOURCC('p', 'g', '1', '2')
+#define MMAL_ENCODING_BAYER_SGBRG12P   MMAL_FOURCC('p', 'G', '1', '2')
+#define MMAL_ENCODING_BAYER_SRGGB12P   MMAL_FOURCC('p', 'R', '1', '2')
+
+/* 14 bit per pixel packed Bayer formats. */
+#define MMAL_ENCODING_BAYER_SBGGR14P   MMAL_FOURCC('p', 'B', 'E', 'E')
+#define MMAL_ENCODING_BAYER_SGBRG14P   MMAL_FOURCC('p', 'G', 'E', 'E')
+#define MMAL_ENCODING_BAYER_SGRBG14P   MMAL_FOURCC('p', 'g', 'E', 'E')
+#define MMAL_ENCODING_BAYER_SRGGB14P   MMAL_FOURCC('p', 'R', 'E', 'E')
+
+/* 16 bit per pixel Bayer formats. */
+#define MMAL_ENCODING_BAYER_SBGGR16    MMAL_FOURCC('B', 'G', '1', '6')
+#define MMAL_ENCODING_BAYER_SGBRG16    MMAL_FOURCC('G', 'B', '1', '6')
+#define MMAL_ENCODING_BAYER_SGRBG16    MMAL_FOURCC('G', 'R', '1', '6')
+#define MMAL_ENCODING_BAYER_SRGGB16    MMAL_FOURCC('R', 'G', '1', '6')
+
+/* 10 bit per pixel unpacked (16bit) Bayer formats. */
+#define MMAL_ENCODING_BAYER_SBGGR10    MMAL_FOURCC('B', 'G', '1', '0')
+#define MMAL_ENCODING_BAYER_SGRBG10    MMAL_FOURCC('B', 'A', '1', '0')
+#define MMAL_ENCODING_BAYER_SGBRG10    MMAL_FOURCC('G', 'B', '1', '0')
+#define MMAL_ENCODING_BAYER_SRGGB10    MMAL_FOURCC('R', 'G', '1', '0')
+
+/* 12 bit per pixel unpacked (16bit) Bayer formats */
+#define MMAL_ENCODING_BAYER_SBGGR12    MMAL_FOURCC('B', 'G', '1', '2')
+#define MMAL_ENCODING_BAYER_SGRBG12    MMAL_FOURCC('B', 'A', '1', '2')
+#define MMAL_ENCODING_BAYER_SGBRG12    MMAL_FOURCC('G', 'B', '1', '2')
+#define MMAL_ENCODING_BAYER_SRGGB12    MMAL_FOURCC('R', 'G', '1', '2')
+
+/* 14 bit per pixel unpacked (16bit) Bayer formats */
+#define MMAL_ENCODING_BAYER_SBGGR14    MMAL_FOURCC('B', 'G', '1', '4')
+#define MMAL_ENCODING_BAYER_SGBRG14    MMAL_FOURCC('G', 'B', '1', '4')
+#define MMAL_ENCODING_BAYER_SGRBG14    MMAL_FOURCC('G', 'R', '1', '4')
+#define MMAL_ENCODING_BAYER_SRGGB14    MMAL_FOURCC('R', 'G', '1', '4')
+
+/* MIPI packed monochrome images */
+#define MMAL_ENCODING_GREY    MMAL_FOURCC('G', 'R', 'E', 'Y')
+#define MMAL_ENCODING_Y10P    MMAL_FOURCC('Y', '1', '0', 'P')
+#define MMAL_ENCODING_Y12P    MMAL_FOURCC('Y', '1', '2', 'P')
+#define MMAL_ENCODING_Y14P    MMAL_FOURCC('Y', '1', '4', 'P')
+#define MMAL_ENCODING_Y16     MMAL_FOURCC('Y', '1', '6', ' ')
+
+/* Unpacked monochrome formats (16bit per sample, but only N LSBs used) */
+#define MMAL_ENCODING_Y10     MMAL_FOURCC('Y', '1', '0', ' ')
+#define MMAL_ENCODING_Y12     MMAL_FOURCC('Y', '1', '2', ' ')
+#define MMAL_ENCODING_Y14     MMAL_FOURCC('Y', '1', '4', ' ')
+
 /** An EGL image handle
  */
 #define MMAL_ENCODING_EGL_IMAGE        MMAL_FOURCC('E', 'G', 'L', 'I')

-- 
2.52.0