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[media] V4L2: mx3_camera: add support for asynchronous subdevice registration 

The soc-camera core does all the work on supporting asynchronous
subdevice probing, host drivers only have to pass a subdevice list to
soc-camera. Typically this list is provided by the platform.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Guennadi Liakhovetski 2013-07-30 02:59:49 -03:00 committed by Mauro Carvalho Chehab
parent 2bcccaec99
commit 4dbfd04075
2 changed files with 17 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/media/platform/soc_camera/mx3_camera.c
View File

@ -1144,6 +1144,7 @@ static struct soc_camera_host_ops mx3_soc_camera_host_ops = {
static int mx3_camera_probe(struct platform_device *pdev)
{
struct mx3_camera_pdata *pdata = pdev->dev.platform_data;
struct mx3_camera_dev *mx3_cam;
struct resource *res;
void __iomem *base;
@ -1155,6 +1156,9 @@ static int mx3_camera_probe(struct platform_device *pdev)
if (IS_ERR(base))
return PTR_ERR(base);
if (!pdata)
return -EINVAL;
mx3_cam = devm_kzalloc(&pdev->dev, sizeof(*mx3_cam), GFP_KERNEL);
if (!mx3_cam) {
dev_err(&pdev->dev, "Could not allocate mx3 camera object\n");
@ -1165,8 +1169,8 @@ static int mx3_camera_probe(struct platform_device *pdev)
if (IS_ERR(mx3_cam->clk))
return PTR_ERR(mx3_cam->clk);
mx3_cam->pdata = pdev->dev.platform_data;
mx3_cam->platform_flags = mx3_cam->pdata->flags;
mx3_cam->pdata = pdata;
mx3_cam->platform_flags = pdata->flags;
if (!(mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_MASK)) {
/*
* Platform hasn't set available data widths. This is bad.
@ -1185,7 +1189,7 @@ static int mx3_camera_probe(struct platform_device *pdev)
if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15)
mx3_cam->width_flags |= 1 << 14;
mx3_cam->mclk = mx3_cam->pdata->mclk_10khz * 10000;
mx3_cam->mclk = pdata->mclk_10khz * 10000;
if (!mx3_cam->mclk) {
dev_warn(&pdev->dev,
"mclk_10khz == 0! Please, fix your platform data. "
@ -1210,6 +1214,11 @@ static int mx3_camera_probe(struct platform_device *pdev)
if (IS_ERR(mx3_cam->alloc_ctx))
return PTR_ERR(mx3_cam->alloc_ctx);
if (pdata->asd_sizes) {
soc_host->asd = pdata->asd;
soc_host->asd_sizes = pdata->asd_sizes;
}
err = soc_camera_host_register(soc_host);
if (err)
goto ecamhostreg;
@ -1249,6 +1258,7 @@ static int mx3_camera_remove(struct platform_device *pdev)
static struct platform_driver mx3_camera_driver = {
.driver = {
.name = MX3_CAM_DRV_NAME,
.owner = THIS_MODULE,
},
.probe = mx3_camera_probe,
.remove = mx3_camera_remove,

4
include/linux/platform_data/camera-mx3.h
View File

@ -33,6 +33,8 @@
#define MX3_CAMERA_DATAWIDTH_MASK (MX3_CAMERA_DATAWIDTH_4 | MX3_CAMERA_DATAWIDTH_8 | \
MX3_CAMERA_DATAWIDTH_10 | MX3_CAMERA_DATAWIDTH_15)
struct v4l2_async_subdev;
/**
* struct mx3_camera_pdata - i.MX3x camera platform data
* @flags: MX3_CAMERA_* flags
@ -43,6 +45,8 @@ struct mx3_camera_pdata {
unsigned long flags;
unsigned long mclk_10khz;
struct device *dma_dev;
struct v4l2_async_subdev **asd; /* Flat array, arranged in groups */
int *asd_sizes; /* 0-terminated array of asd group sizes */
};
#endif