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gpu: ipu-v3: Add rotation mode conversion utilities 

Add two functions:

- ipu_degrees_to_rot_mode(): converts a degrees, hflip, and vflip setting
  to an IPU rotation mode.
- ipu_rot_mode_to_degrees(): converts an IPU rotation mode with given hflip
  and vflip settings to degrees.

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 18:05:37 -07:00 committed by Philipp Zabel
parent ae0e9708b3
commit f835f386a1
2 changed files with 68 additions and 0 deletions
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64
drivers/gpu/ipu-v3/ipu-common.c
View File

@ -114,6 +114,70 @@ enum ipu_color_space ipu_mbus_code_to_colorspace(u32 mbus_code)
}
EXPORT_SYMBOL_GPL(ipu_mbus_code_to_colorspace);
int ipu_degrees_to_rot_mode(enum ipu_rotate_mode *mode, int degrees,
bool hflip, bool vflip)
{
u32 r90, vf, hf;
switch (degrees) {
case 0:
vf = hf = r90 = 0;
break;
case 90:
vf = hf = 0;
r90 = 1;
break;
case 180:
vf = hf = 1;
r90 = 0;
break;
case 270:
vf = hf = r90 = 1;
break;
default:
return -EINVAL;
}
hf ^= (u32)hflip;
vf ^= (u32)vflip;
*mode = (enum ipu_rotate_mode)((r90 << 2) | (hf << 1) | vf);
return 0;
}
EXPORT_SYMBOL_GPL(ipu_degrees_to_rot_mode);
int ipu_rot_mode_to_degrees(int *degrees, enum ipu_rotate_mode mode,
bool hflip, bool vflip)
{
u32 r90, vf, hf;
r90 = ((u32)mode >> 2) & 0x1;
hf = ((u32)mode >> 1) & 0x1;
vf = ((u32)mode >> 0) & 0x1;
hf ^= (u32)hflip;
vf ^= (u32)vflip;
switch ((enum ipu_rotate_mode)((r90 << 2) | (hf << 1) | vf)) {
case IPU_ROTATE_NONE:
*degrees = 0;
break;
case IPU_ROTATE_90_RIGHT:
*degrees = 90;
break;
case IPU_ROTATE_180:
*degrees = 180;
break;
case IPU_ROTATE_90_LEFT:
*degrees = 270;
break;
default:
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL_GPL(ipu_rot_mode_to_degrees);
struct ipuv3_channel *ipu_idmac_get(struct ipu_soc *ipu, unsigned num)
{
struct ipuv3_channel *channel;

4
include/video/imx-ipu-v3.h
View File

@ -301,6 +301,10 @@ 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_degrees_to_rot_mode(enum ipu_rotate_mode *mode, int degrees,
bool hflip, bool vflip);
int ipu_rot_mode_to_degrees(int *degrees, enum ipu_rotate_mode mode,
bool hflip, bool vflip);
struct ipu_client_platformdata {
int csi;