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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2011-07-26 13:13:47 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-11-03 18:27:30 -0200
commitf836c6289b0cfbfaf2f90202d0edcb45f957f7cd (patch)
tree44c5b8b6733f55ab9176653f400761d6bd5ace95 /drivers/media/video/sh_mobile_csi2.c
parent19a1780b628ecbc943465fa4d53b69e94c279f23 (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.c58
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 2893a0134c7e..09ef63d912e3 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;