[PATCH v2 04/32] media: v4l2-common: Add helper function media_bus_fmt_to_csi2_dt()

[Frank Li]

CSI2 data type is defined by MIPI Camera Serial Interface 2 Spec Ver4.1.
See section 9.4.

Add helper function media_bus_fmt_to_csi2_dt() to convert media bus fmt to
MIPI defined data type and avoid below duplicated static array in each CSI2
drivers.

	{
		.code = MEDIA_BUS_FMT_UYVY8_1X16,
		.data_type = MIPI_CSI2_DT_YUV422_8B,
	}

Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
 drivers/media/v4l2-core/v4l2-common.c | 44 +++++++++++++++++++++++++++++++++++
 include/media/mipi-csi2.h             |  3 +++
 2 files changed, 47 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index 3a48b6a55c6e322696b910dd519def4f0b4a58fb..fcc01030beb347499da2a3c8539793d20f6f512c 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -701,6 +701,50 @@ int v4l2_link_freq_to_bitmap(struct device *dev, const u64 *fw_link_freqs,
 }
 EXPORT_SYMBOL_GPL(v4l2_link_freq_to_bitmap);
 
+int media_bus_fmt_to_csi2_dt(int bus_fmt)
+{
+	switch (bus_fmt) {
+	case MEDIA_BUS_FMT_UYVY8_1X16:
+		return MIPI_CSI2_DT_YUV422_8B;
+	case MEDIA_BUS_FMT_RGB565_1X16:
+		return MIPI_CSI2_DT_RGB565;
+	case MEDIA_BUS_FMT_BGR888_1X24:
+		return MIPI_CSI2_DT_RGB888;
+	case MEDIA_BUS_FMT_SBGGR8_1X8:
+	case MEDIA_BUS_FMT_SGBRG8_1X8:
+	case MEDIA_BUS_FMT_SGRBG8_1X8:
+	case MEDIA_BUS_FMT_SRGGB8_1X8:
+	case MEDIA_BUS_FMT_Y8_1X8:
+		return MIPI_CSI2_DT_RAW8;
+	case MEDIA_BUS_FMT_SBGGR10_1X10:
+	case MEDIA_BUS_FMT_SGBRG10_1X10:
+	case MEDIA_BUS_FMT_SGRBG10_1X10:
+	case MEDIA_BUS_FMT_SRGGB10_1X10:
+	case MEDIA_BUS_FMT_Y10_1X10:
+		return MIPI_CSI2_DT_RAW10;
+	case MEDIA_BUS_FMT_SBGGR12_1X12:
+	case MEDIA_BUS_FMT_SGBRG12_1X12:
+	case MEDIA_BUS_FMT_SGRBG12_1X12:
+	case MEDIA_BUS_FMT_SRGGB12_1X12:
+	case MEDIA_BUS_FMT_Y12_1X12:
+		return MIPI_CSI2_DT_RAW12;
+	case MEDIA_BUS_FMT_SBGGR14_1X14:
+	case MEDIA_BUS_FMT_SGBRG14_1X14:
+	case MEDIA_BUS_FMT_SGRBG14_1X14:
+	case MEDIA_BUS_FMT_SRGGB14_1X14:
+		return MIPI_CSI2_DT_RAW14;
+	case MEDIA_BUS_FMT_SBGGR16_1X16:
+	case MEDIA_BUS_FMT_SGBRG16_1X16:
+	case MEDIA_BUS_FMT_SGRBG16_1X16:
+	case MEDIA_BUS_FMT_SRGGB16_1X16:
+		return MIPI_CSI2_DT_RAW16;
+
+	default:
+		return MIPI_CSI2_DT_NULL;
+	}
+}
+EXPORT_SYMBOL_GPL(media_bus_fmt_to_csi2_dt);
+
 int media_bus_fmt_to_csi2_bpp(int bus_fmt)
 {
 	switch (bus_fmt) {
diff --git a/include/media/mipi-csi2.h b/include/media/mipi-csi2.h
index c5b4e8e1ca93803568b1eee85f7f99c3a45a0b6e..35de536b9b65b49ad9e2914437d26d0e4240cf38 100644
--- a/include/media/mipi-csi2.h
+++ b/include/media/mipi-csi2.h
@@ -8,6 +8,8 @@
 #ifndef _MEDIA_MIPI_CSI2_H
 #define _MEDIA_MIPI_CSI2_H
 
+/* DT value ref to MIPI Camera Serial Interface 2 Spec Ver4.1 section 9.4 */
+
 /* Short packet data types */
 #define MIPI_CSI2_DT_FS			0x00
 #define MIPI_CSI2_DT_FE			0x01
@@ -44,6 +46,7 @@
 #define MIPI_CSI2_DT_RAW20		0x2f
 #define MIPI_CSI2_DT_USER_DEFINED(n)	(0x30 + (n))	/* 0..7 */
 
+int media_bus_fmt_to_csi2_dt(int buf_fmt);
 int media_bus_fmt_to_csi2_bpp(int bus_fmt);
 
 #endif /* _MEDIA_MIPI_CSI2_H */

-- 
2.34.1