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gpu: ipu-v3: Add ipu_stride_to_bytes() 

Adds ipu_stride_to_bytes(), which converts a pixel stride to bytes,
suitable for passing to cpmem.

Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Steve Longerbeam 2014-06-25 18:05:43 -07:00 committed by Philipp Zabel
parent e7268c699b
commit 6930afdccf
2 changed files with 31 additions and 0 deletions
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30
drivers/gpu/ipu-v3/ipu-common.c
View File

@ -126,6 +126,36 @@ 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)
{

1
include/video/imx-ipu-v3.h
View File

@ -333,6 +333,7 @@ int ipu_smfc_set_watermark(struct ipu_smfc *smfc, u32 set_level, u32 clr_level);
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);