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author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2009-03-13 06:08:20 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 12:43:21 -0300 |
commit | 09e231b35173313cd92e27532e5028f2042dcee4 (patch) | |
tree | 3ecda063aa52f954d2f797921bdce131d7f1cc28 /drivers/media/video/mx3_camera.c | |
parent | 1cd3c0fa927084549005fc22e54d99684b314f14 (diff) | |
download | kernel_samsung_espresso10-09e231b35173313cd92e27532e5028f2042dcee4.zip kernel_samsung_espresso10-09e231b35173313cd92e27532e5028f2042dcee4.tar.gz kernel_samsung_espresso10-09e231b35173313cd92e27532e5028f2042dcee4.tar.bz2 |
V4L/DVB (11024): soc-camera: separate S_FMT and S_CROP operations
As host and camera drivers become more complex, differences between S_FMT and
S_CROP functionality grow, this patch separates them.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/mx3_camera.c')
-rw-r--r-- | drivers/media/video/mx3_camera.c | 157 |
1 files changed, 97 insertions, 60 deletions
diff --git a/drivers/media/video/mx3_camera.c b/drivers/media/video/mx3_camera.c index f525dc4..70629e1 100644 --- a/drivers/media/video/mx3_camera.c +++ b/drivers/media/video/mx3_camera.c @@ -544,16 +544,14 @@ static void mx3_camera_remove_device(struct soc_camera_device *icd) } static bool channel_change_requested(struct soc_camera_device *icd, - const struct soc_camera_format_xlate *xlate, - __u32 pixfmt, struct v4l2_rect *rect) + struct v4l2_rect *rect) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct mx3_camera_dev *mx3_cam = ici->priv; struct idmac_channel *ichan = mx3_cam->idmac_channel[0]; - /* So far only one configuration is supported */ - return pixfmt || (ichan && rect->width * rect->height > - icd->width * icd->height); + /* Do buffers have to be re-allocated or channel re-configured? */ + return ichan && rect->width * rect->height > icd->width * icd->height; } static int test_platform_param(struct mx3_camera_dev *mx3_cam, @@ -733,61 +731,10 @@ passthrough: return formats; } -static int mx3_camera_set_fmt(struct soc_camera_device *icd, - __u32 pixfmt, struct v4l2_rect *rect) +static void configure_geometry(struct mx3_camera_dev *mx3_cam, + struct v4l2_rect *rect) { - struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); - struct mx3_camera_dev *mx3_cam = ici->priv; - const struct soc_camera_format_xlate *xlate; u32 ctrl, width_field, height_field; - int ret; - - xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); - if (pixfmt && !xlate) { - dev_warn(&ici->dev, "Format %x not found\n", pixfmt); - return -EINVAL; - } - - /* - * We now know pixel formats and can decide upon DMA-channel(s) - * So far only direct camera-to-memory is supported - */ - if (channel_change_requested(icd, xlate, pixfmt, rect)) { - dma_cap_mask_t mask; - struct dma_chan *chan; - struct idmac_channel **ichan = &mx3_cam->idmac_channel[0]; - /* We have to use IDMAC_IC_7 for Bayer / generic data */ - struct dma_chan_request rq = {.mx3_cam = mx3_cam, - .id = IDMAC_IC_7}; - - if (*ichan) { - struct videobuf_buffer *vb, *_vb; - dma_release_channel(&(*ichan)->dma_chan); - *ichan = NULL; - mx3_cam->active = NULL; - list_for_each_entry_safe(vb, _vb, &mx3_cam->capture, queue) { - list_del_init(&vb->queue); - vb->state = VIDEOBUF_ERROR; - wake_up(&vb->done); - } - } - - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - dma_cap_set(DMA_PRIVATE, mask); - chan = dma_request_channel(mask, chan_filter, &rq); - if (!chan) - return -EBUSY; - - *ichan = to_idmac_chan(chan); - (*ichan)->client = mx3_cam; - } - - /* - * Might have to perform a complete interface initialisation like in - * ipu_csi_init_interface() in mxc_v4l2_s_param(). Also consider - * mxc_v4l2_s_fmt() - */ /* Setup frame size - this cannot be changed on-the-fly... */ width_field = rect->width - 1; @@ -808,9 +755,98 @@ static int mx3_camera_set_fmt(struct soc_camera_device *icd, * No need to free resources here if we fail, we'll see if we need to * do this next time we are called */ +} + +static int acquire_dma_channel(struct mx3_camera_dev *mx3_cam) +{ + dma_cap_mask_t mask; + struct dma_chan *chan; + struct idmac_channel **ichan = &mx3_cam->idmac_channel[0]; + /* We have to use IDMAC_IC_7 for Bayer / generic data */ + struct dma_chan_request rq = {.mx3_cam = mx3_cam, + .id = IDMAC_IC_7}; + + if (*ichan) { + struct videobuf_buffer *vb, *_vb; + dma_release_channel(&(*ichan)->dma_chan); + *ichan = NULL; + mx3_cam->active = NULL; + list_for_each_entry_safe(vb, _vb, &mx3_cam->capture, queue) { + list_del_init(&vb->queue); + vb->state = VIDEOBUF_ERROR; + wake_up(&vb->done); + } + } + + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + dma_cap_set(DMA_PRIVATE, mask); + chan = dma_request_channel(mask, chan_filter, &rq); + if (!chan) + return -EBUSY; + + *ichan = to_idmac_chan(chan); + (*ichan)->client = mx3_cam; + + return 0; +} + +static int mx3_camera_set_crop(struct soc_camera_device *icd, + struct v4l2_rect *rect) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); + struct mx3_camera_dev *mx3_cam = ici->priv; + + /* + * We now know pixel formats and can decide upon DMA-channel(s) + * So far only direct camera-to-memory is supported + */ + if (channel_change_requested(icd, rect)) { + int ret = acquire_dma_channel(mx3_cam); + if (ret < 0) + return ret; + } + + configure_geometry(mx3_cam, rect); + + return icd->ops->set_crop(icd, rect); +} + +static int mx3_camera_set_fmt(struct soc_camera_device *icd, + struct v4l2_format *f) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); + struct mx3_camera_dev *mx3_cam = ici->priv; + const struct soc_camera_format_xlate *xlate; + struct v4l2_pix_format *pix = &f->fmt.pix; + struct v4l2_rect rect = { + .left = icd->x_current, + .top = icd->y_current, + .width = pix->width, + .height = pix->height, + }; + int ret; + + xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); + if (!xlate) { + dev_warn(&ici->dev, "Format %x not found\n", pix->pixelformat); + return -EINVAL; + } + + ret = acquire_dma_channel(mx3_cam); + if (ret < 0) + return ret; + + /* + * Might have to perform a complete interface initialisation like in + * ipu_csi_init_interface() in mxc_v4l2_s_param(). Also consider + * mxc_v4l2_s_fmt() + */ + + configure_geometry(mx3_cam, &rect); - ret = icd->ops->set_fmt(icd, pixfmt ? xlate->cam_fmt->fourcc : 0, rect); - if (pixfmt && !ret) { + ret = icd->ops->set_fmt(icd, f); + if (!ret) { icd->buswidth = xlate->buswidth; icd->current_fmt = xlate->host_fmt; } @@ -1031,6 +1067,7 @@ static struct soc_camera_host_ops mx3_soc_camera_host_ops = { .suspend = mx3_camera_suspend, .resume = mx3_camera_resume, #endif + .set_crop = mx3_camera_set_crop, .set_fmt = mx3_camera_set_fmt, .try_fmt = mx3_camera_try_fmt, .get_formats = mx3_camera_get_formats, |