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[media] V4L: sh_mobile_ceu_camera: don't try to improve client scaling, if perfect 

If the client has managed to configure the precise output format,
we don't have to try to further improve it.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Guennadi Liakhovetski 2011-07-22 09:44:40 -03:00 committed by Mauro Carvalho Chehab
parent eec5ce013a
commit 369887411f
1 changed files with 16 additions and 5 deletions
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21
drivers/media/video/sh_mobile_ceu_camera.c
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@ -1279,6 +1279,7 @@ static int client_s_fmt(struct soc_camera_device *icd,
unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h;
unsigned int max_width, max_height;
struct v4l2_cropcap cap;
bool ceu_1to1;
int ret;
ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
@ -1288,7 +1289,14 @@ static int client_s_fmt(struct soc_camera_device *icd,
dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height);
if ((width == mf->width && height == mf->height) || !ceu_can_scale)
if (width == mf->width && height == mf->height) {
/* Perfect! The client has done it all. */
ceu_1to1 = true;
goto update_cache;
}
ceu_1to1 = false;
if (!ceu_can_scale)
goto update_cache;
cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
@ -1328,7 +1336,10 @@ update_cache:
if (ret < 0)
return ret;
update_subrect(cam);
if (ceu_1to1)
cam->subrect = cam->rect;
else
update_subrect(cam);
return 0;
}
@ -1579,8 +1590,8 @@ static void calculate_client_output(struct soc_camera_device *icd,
dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v);
/*
* 4. Calculate client output window by applying combined scales to real
* input window.
* 4. Calculate desired client output window by applying combined scales
* to client (real) input window.
*/
mf->width = scale_down(cam->rect.width, scale_h);
mf->height = scale_down(cam->rect.height, scale_v);
@ -1627,7 +1638,7 @@ static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
return -EINVAL;
}
/* 1.-4. Calculate client output geometry */
/* 1.-4. Calculate desired client output geometry */
calculate_client_output(icd, pix, &mf);
mf.field = pix->field;
mf.colorspace = pix->colorspace;