[media] vimc: common: Add vimc_colorimetry_clamp

Colorimetry value will always be checked in the same way. Adding a
helper macro for that

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/media/platform/vimc/vimc-common.h b/drivers/media/platform/vimc/vimc-common.h
index 60ebde28f56b..43483eecb116 100644
--- a/drivers/media/platform/vimc/vimc-common.h
+++ b/drivers/media/platform/vimc/vimc-common.h
@@ -23,6 +23,32 @@
 #include <media/v4l2-device.h>
 
 /**
+ * struct vimc_colorimetry_clamp - Adjust colorimetry parameters
+ *
+ * @fmt:                the pointer to struct v4l2_pix_format or
+ *                      struct v4l2_mbus_framefmt
+ *
+ * Entities must check if colorimetry given by the userspace is valid, if not
+ * then set them as DEFAULT
+ */
+#define vimc_colorimetry_clamp(fmt)                                     \
+do {                                                                    \
+        if ((fmt)->colorspace == V4L2_COLORSPACE_DEFAULT                \
+            || (fmt)->colorspace > V4L2_COLORSPACE_DCI_P3) {            \
+                (fmt)->colorspace = V4L2_COLORSPACE_DEFAULT;            \
+                (fmt)->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;              \
+                (fmt)->quantization = V4L2_QUANTIZATION_DEFAULT;        \
+                (fmt)->xfer_func = V4L2_XFER_FUNC_DEFAULT;              \
+        }                                                               \
+        if ((fmt)->ycbcr_enc > V4L2_YCBCR_ENC_SMPTE240M)                \
+                (fmt)->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;              \
+        if ((fmt)->quantization > V4L2_QUANTIZATION_LIM_RANGE)          \
+                (fmt)->quantization = V4L2_QUANTIZATION_DEFAULT;        \
+        if ((fmt)->xfer_func > V4L2_XFER_FUNC_SMPTE2084)                \
+                (fmt)->xfer_func = V4L2_XFER_FUNC_DEFAULT;              \
+} while (0)
+
+/**
  * struct vimc_pix_map - maps media bus code with v4l2 pixel format
  *
  * @code:               media bus format code defined by MEDIA_BUS_FMT_* macros