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authorSteve Longerbeam <slongerbeam@gmail.com>2014-06-25 18:05:43 -0700
committerPhilipp Zabel <p.zabel@pengutronix.de>2014-09-02 14:55:50 +0200
commit6930afdccfd2b3e6669c305d97958d81cf0d072e (patch)
treebfff374703164662e7f4dab97270691f7420e984 /drivers/gpu/ipu-v3
parente7268c699bbe578e6dcf02e9f7f5a267837bc18f (diff)
downloadlinux-6930afdccfd2b3e6669c305d97958d81cf0d072e.tar.bz2
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>
Diffstat (limited to 'drivers/gpu/ipu-v3')
-rw-r--r--drivers/gpu/ipu-v3/ipu-common.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-common.c b/drivers/gpu/ipu-v3/ipu-common.c
index 985a7508af3a..e542d5e8a9e1 100644
--- a/drivers/gpu/ipu-v3/ipu-common.c
+++ b/drivers/gpu/ipu-v3/ipu-common.c
@@ -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)
{