linux-kernel - [PATCH v4 06/11] [media] vimc: common: Add vimc_colorimetry

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Date:   Tue, 13 Jun 2017 16:35:34 -0300
From:   Helen Koike <helen.koike@...labora.com>
To:     linux-media@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-kernel@...r.kernel.org
Cc:     Hans Verkuil <hverkuil@...all.nl>, jgebben@...eaurora.org,
        mchehab@....samsung.com, Sakari Ailus <sakari.ailus@....fi>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: [PATCH v4 06/11] [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@...labora.com>

---

Changes in v4:
[media] vimc: common: Add vimc_colorimetry_clamp
	- this is a new patch in the series

Changes in v3: None
Changes in v2: None


---
 drivers/media/platform/vimc/vimc-common.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/media/platform/vimc/vimc-common.h b/drivers/media/platform/vimc/vimc-common.h
index 60ebde2..43483ee 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
-- 
2.7.4