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V4L/DVB: V4L2: sh_mobile_camera_ceu: add support for CSI2
Using CEU with CSI2 on SH-Mobile requires some special configuration of the former. We also have to switch from calling only one subdev .s_mbus_fmt and .try_mbus_fmt to calling all subdevices. Take care to increment CSI2 driver use count to prevent it from unloading, while in use. 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
Mauro Carvalho Chehab
parent
077e2c10c9
commit
b3b5020d8c
@ -633,6 +633,12 @@ static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
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cdwdr_width *= 2;
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}
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/* CSI2 special configuration */
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if (pcdev->pdata->csi2_dev) {
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in_width = ((in_width - 2) * 2);
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left_offset *= 2;
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}
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/* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
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camor = left_offset | (top_offset << 16);
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@ -767,6 +773,11 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
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value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
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value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
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value |= pcdev->is_16bit ? 1 << 12 : 0;
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/* CSI2 mode */
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if (pcdev->pdata->csi2_dev)
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value |= 3 << 12;
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ceu_write(pcdev, CAMCR, value);
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ceu_write(pcdev, CAPCR, 0x00300000);
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@ -883,6 +894,8 @@ static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int
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{
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struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
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struct device *dev = icd->dev.parent;
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struct soc_camera_host *ici = to_soc_camera_host(dev);
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struct sh_mobile_ceu_dev *pcdev = ici->priv;
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int ret, k, n;
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int formats = 0;
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struct sh_mobile_ceu_cam *cam;
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@ -896,19 +909,19 @@ static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int
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fmt = soc_mbus_get_fmtdesc(code);
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if (!fmt) {
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dev_err(icd->dev.parent,
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"Invalid format code #%u: %d\n", idx, code);
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dev_err(dev, "Invalid format code #%u: %d\n", idx, code);
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return -EINVAL;
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}
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ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
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if (ret < 0)
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return 0;
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if (!pcdev->pdata->csi2_dev) {
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ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
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if (ret < 0)
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return 0;
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}
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if (!icd->host_priv) {
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struct v4l2_mbus_framefmt mf;
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struct v4l2_rect rect;
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struct device *dev = icd->dev.parent;
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int shift = 0;
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/* FIXME: subwindow is lost between close / open */
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@ -927,7 +940,8 @@ static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int
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/* Try 2560x1920, 1280x960, 640x480, 320x240 */
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mf.width = 2560 >> shift;
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mf.height = 1920 >> shift;
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ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
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ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video,
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s_mbus_fmt, &mf);
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if (ret < 0)
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return ret;
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shift++;
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@ -1228,7 +1242,8 @@ static int client_s_fmt(struct soc_camera_device *icd,
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struct v4l2_cropcap cap;
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int ret;
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ret = v4l2_subdev_call(sd, video, s_mbus_fmt, mf);
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ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video,
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s_mbus_fmt, mf);
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if (ret < 0)
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return ret;
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@ -1257,7 +1272,8 @@ static int client_s_fmt(struct soc_camera_device *icd,
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tmp_h = min(2 * tmp_h, max_height);
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mf->width = tmp_w;
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mf->height = tmp_h;
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ret = v4l2_subdev_call(sd, video, s_mbus_fmt, mf);
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ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video,
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s_mbus_fmt, mf);
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dev_geo(dev, "Camera scaled to %ux%u\n",
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mf->width, mf->height);
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if (ret < 0) {
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@ -1514,7 +1530,8 @@ static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
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struct device *dev = icd->dev.parent;
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__u32 pixfmt = pix->pixelformat;
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const struct soc_camera_format_xlate *xlate;
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unsigned int ceu_sub_width, ceu_sub_height;
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/* Keep Compiler Happy */
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unsigned int ceu_sub_width = 0, ceu_sub_height = 0;
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u16 scale_v, scale_h;
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int ret;
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bool image_mode;
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@ -1569,8 +1586,8 @@ static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
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/* Done with the camera. Now see if we can improve the result */
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dev_geo(dev, "Camera %d fmt %ux%u, requested %ux%u\n",
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ret, mf.width, mf.height, pix->width, pix->height);
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dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
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mf.width, mf.height, pix->width, pix->height);
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if (ret < 0)
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return ret;
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@ -1634,6 +1651,9 @@ static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
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int width, height;
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int ret;
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dev_geo(icd->dev.parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
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pixfmt, pix->width, pix->height);
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xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
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if (!xlate) {
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dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt);
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@ -1660,7 +1680,7 @@ static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
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mf.code = xlate->code;
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mf.colorspace = pix->colorspace;
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ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
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ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video, try_mbus_fmt, &mf);
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if (ret < 0)
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return ret;
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@ -1684,7 +1704,8 @@ static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
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*/
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mf.width = 2560;
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mf.height = 1920;
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ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
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ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video,
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try_mbus_fmt, &mf);
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if (ret < 0) {
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/* Shouldn't actually happen... */
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dev_err(icd->dev.parent,
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@ -1699,6 +1720,9 @@ static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
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pix->height = height;
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}
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dev_geo(icd->dev.parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
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__func__, ret, pix->pixelformat, pix->width, pix->height);
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return ret;
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}
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@ -1853,6 +1877,30 @@ static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
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.num_controls = ARRAY_SIZE(sh_mobile_ceu_controls),
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};
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struct bus_wait {
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struct notifier_block notifier;
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struct completion completion;
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struct device *dev;
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};
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static int bus_notify(struct notifier_block *nb,
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unsigned long action, void *data)
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{
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struct device *dev = data;
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struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
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if (wait->dev != dev)
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return NOTIFY_DONE;
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switch (action) {
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case BUS_NOTIFY_UNBOUND_DRIVER:
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/* Protect from module unloading */
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wait_for_completion(&wait->completion);
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return NOTIFY_OK;
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}
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return NOTIFY_DONE;
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}
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static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
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{
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struct sh_mobile_ceu_dev *pcdev;
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@ -1860,6 +1908,11 @@ static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
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void __iomem *base;
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unsigned int irq;
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int err = 0;
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struct bus_wait wait = {
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.completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
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.notifier.notifier_call = bus_notify,
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};
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struct device *csi2;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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irq = platform_get_irq(pdev, 0);
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@ -1931,12 +1984,54 @@ static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
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pcdev->ici.drv_name = dev_name(&pdev->dev);
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pcdev->ici.ops = &sh_mobile_ceu_host_ops;
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/* CSI2 interfacing */
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csi2 = pcdev->pdata->csi2_dev;
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if (csi2) {
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wait.dev = csi2;
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err = bus_register_notifier(&platform_bus_type, &wait.notifier);
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if (err < 0)
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goto exit_free_clk;
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/*
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* From this point the driver module will not unload, until
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* we complete the completion.
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*/
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if (!csi2->driver || !csi2->driver->owner) {
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complete(&wait.completion);
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/* Either too late, or probing failed */
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bus_unregister_notifier(&platform_bus_type, &wait.notifier);
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err = -ENXIO;
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goto exit_free_clk;
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}
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/*
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* The module is still loaded, in the worst case it is hanging
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* in device release on our completion. So, _now_ dereferencing
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* the "owner" is safe!
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*/
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err = try_module_get(csi2->driver->owner);
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/* Let notifier complete, if it has been locked */
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complete(&wait.completion);
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bus_unregister_notifier(&platform_bus_type, &wait.notifier);
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if (!err) {
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err = -ENODEV;
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goto exit_free_clk;
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}
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}
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err = soc_camera_host_register(&pcdev->ici);
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if (err)
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goto exit_free_clk;
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goto exit_module_put;
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return 0;
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exit_module_put:
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if (csi2 && csi2->driver)
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module_put(csi2->driver->owner);
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exit_free_clk:
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pm_runtime_disable(&pdev->dev);
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free_irq(pcdev->irq, pcdev);
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@ -1956,6 +2051,7 @@ static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
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struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
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struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
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struct sh_mobile_ceu_dev, ici);
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struct device *csi2 = pcdev->pdata->csi2_dev;
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soc_camera_host_unregister(soc_host);
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pm_runtime_disable(&pdev->dev);
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@ -1963,7 +2059,10 @@ static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
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if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
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dma_release_declared_memory(&pdev->dev);
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iounmap(pcdev->base);
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if (csi2 && csi2->driver)
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module_put(csi2->driver->owner);
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kfree(pcdev);
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return 0;
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}
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@ -1995,6 +2094,8 @@ static struct platform_driver sh_mobile_ceu_driver = {
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static int __init sh_mobile_ceu_init(void)
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{
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/* Whatever return code */
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request_module("sh_mobile_csi2");
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return platform_driver_register(&sh_mobile_ceu_driver);
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}
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@ -6,8 +6,11 @@
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#define SH_CEU_FLAG_HSYNC_LOW (1 << 2) /* default High if possible */
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#define SH_CEU_FLAG_VSYNC_LOW (1 << 3) /* default High if possible */
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struct device;
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struct sh_mobile_ceu_info {
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unsigned long flags;
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struct device *csi2_dev;
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};
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#endif /* __ASM_SH_MOBILE_CEU_H__ */
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