diff options
| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2011-07-26 13:13:47 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-11-03 18:27:30 -0200 |
| commit | f836c6289b0cfbfaf2f90202d0edcb45f957f7cd (patch) | |
| tree | 44c5b8b6733f55ab9176653f400761d6bd5ace95 /drivers/media/video/sh_mobile_csi2.c | |
| parent | 19a1780b628ecbc943465fa4d53b69e94c279f23 (diff) | |
[media] V4L: sh_mobile_csi2: verify client compatibility
Switch the meaning of the .lanes platform data parameter to specify
the number of used lanes instead of a bitmask. Verify bus configuration
compatibility with client's capabilities.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/sh_mobile_csi2.c')
| -rw-r--r-- | drivers/media/video/sh_mobile_csi2.c | 58 |
1 files changed, 52 insertions, 6 deletions
diff --git a/drivers/media/video/sh_mobile_csi2.c b/drivers/media/video/sh_mobile_csi2.c index 2893a0134c7..09ef63d912e 100644 --- a/drivers/media/video/sh_mobile_csi2.c +++ b/drivers/media/video/sh_mobile_csi2.c @@ -19,6 +19,7 @@ #include <media/sh_mobile_ceu.h> #include <media/sh_mobile_csi2.h> #include <media/soc_camera.h> +#include <media/soc_mediabus.h> #include <media/v4l2-common.h> #include <media/v4l2-dev.h> #include <media/v4l2-device.h> @@ -144,11 +145,21 @@ static void sh_csi2_hwinit(struct sh_csi2 *priv) udelay(5); iowrite32(0x00000000, priv->base + SH_CSI2_SRST); - if (priv->client->lanes & 3) - tmp |= priv->client->lanes & 3; - else - /* Default - both lanes */ - tmp |= 3; + switch (pdata->type) { + case SH_CSI2C: + if (priv->client->lanes == 1) + tmp |= 1; + else + /* Default - both lanes */ + tmp |= 3; + break; + case SH_CSI2I: + if (!priv->client->lanes || priv->client->lanes > 4) + /* Default - all 4 lanes */ + tmp |= 0xf; + else + tmp |= (1 << priv->client->lanes) - 1; + } if (priv->client->phy == SH_CSI2_PHY_MAIN) tmp |= 0x8000; @@ -185,7 +196,9 @@ static int sh_csi2_client_connect(struct sh_csi2 *priv) struct v4l2_subdev *sd, *csi2_sd = &priv->subdev; struct soc_camera_device *icd = NULL; struct device *dev = v4l2_get_subdevdata(&priv->subdev); - int i; + struct v4l2_mbus_config cfg; + unsigned long common_flags, csi2_flags; + int i, ret; v4l2_device_for_each_subdev(sd, csi2_sd->v4l2_dev) if (sd->grp_id) { @@ -205,6 +218,39 @@ static int sh_csi2_client_connect(struct sh_csi2 *priv) if (i == pdata->num_clients) return -ENODEV; + /* Check if we can support this camera */ + csi2_flags = V4L2_MBUS_CSI2_CONTINUOUS_CLOCK | V4L2_MBUS_CSI2_1_LANE; + + switch (pdata->type) { + case SH_CSI2C: + if (pdata->clients[i].lanes != 1) + csi2_flags |= V4L2_MBUS_CSI2_2_LANE; + break; + case SH_CSI2I: + switch (pdata->clients[i].lanes) { + default: + csi2_flags |= V4L2_MBUS_CSI2_4_LANE; + case 3: + csi2_flags |= V4L2_MBUS_CSI2_3_LANE; + case 2: + csi2_flags |= V4L2_MBUS_CSI2_2_LANE; + } + } + + cfg.type = V4L2_MBUS_CSI2; + ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg); + if (ret == -ENOIOCTLCMD) + common_flags = csi2_flags; + else if (!ret) + common_flags = soc_mbus_config_compatible(&cfg, + csi2_flags); + else + common_flags = 0; + + if (!common_flags) + return -EINVAL; + + /* All good: camera MIPI configuration supported */ priv->client = pdata->clients + i; priv->set_bus_param = icd->ops->set_bus_param; |