Adds ipu_stride_to_bytes(), which converts a pixel stride to bytes,
suitable for passing to cpmem.
Signed-off-by: Steve Longerbeam steve_longerb...@mentor.com
---
drivers/gpu/ipu-v3/ipu-common.c | 30 ++
include/video/imx-ipu-v3.h |1 +
2 files changed, 31 insertions(+)
diff --git a/drivers/gpu/ipu-v3/ipu-common.c b/drivers/gpu/ipu-v3/ipu-common.c
index 7701974..30afef4 100644
--- a/drivers/gpu/ipu-v3/ipu-common.c
+++ b/drivers/gpu/ipu-v3/ipu-common.c
@@ -576,6 +576,36 @@ enum ipu_color_space ipu_mbus_code_to_colorspace(u32
mbus_code)
}
EXPORT_SYMBOL_GPL(ipu_mbus_code_to_colorspace);
+int ipu_stride_to_bytes(u32 pixel_stride, u32 pixelformat)
+{
+ switch (pixelformat) {
+ case V4L2_PIX_FMT_YUV420:
+ case V4L2_PIX_FMT_YVU420:
+ /*
+* for the planar YUV formats, the stride passed to
+* cpmem must be the stride in bytes of the Y plane.
+* And all the planar YUV formats have an 8-bit
+* Y component.
+*/
+ return (8 * pixel_stride) 3;
+ case V4L2_PIX_FMT_RGB565:
+ case V4L2_PIX_FMT_YUYV:
+ case V4L2_PIX_FMT_UYVY:
+ return (16 * pixel_stride) 3;
+ case V4L2_PIX_FMT_BGR24:
+ case V4L2_PIX_FMT_RGB24:
+ return (24 * pixel_stride) 3;
+ case V4L2_PIX_FMT_BGR32:
+ case V4L2_PIX_FMT_RGB32:
+ return (32 * pixel_stride) 3;
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(ipu_stride_to_bytes);
+
int ipu_degrees_to_rot_mode(enum ipu_rotate_mode *mode, int degrees,
bool hflip, bool vflip)
{
diff --git a/include/video/imx-ipu-v3.h b/include/video/imx-ipu-v3.h
index 9ed1c75..17a0bb8 100644
--- a/include/video/imx-ipu-v3.h
+++ b/include/video/imx-ipu-v3.h
@@ -480,6 +480,7 @@ int ipu_cpmem_set_image(struct ipu_ch_param __iomem *cpmem,
enum ipu_color_space ipu_drm_fourcc_to_colorspace(u32 drm_fourcc);
enum ipu_color_space ipu_pixelformat_to_colorspace(u32 pixelformat);
enum ipu_color_space ipu_mbus_code_to_colorspace(u32 mbus_code);
+int ipu_stride_to_bytes(u32 pixel_stride, u32 pixelformat);
bool ipu_pixelformat_is_planar(u32 pixelformat);
int ipu_degrees_to_rot_mode(enum ipu_rotate_mode *mode, int degrees,
bool hflip, bool vflip);
--
1.7.9.5
--
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