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authorArchit Taneja <architt@codeaurora.org>2016-02-12 14:48:31 +0530
committerThierry Reding <treding@nvidia.com>2016-03-02 17:00:18 +0100
commitc63ae8a9686bb8c87154a31dc5ebadbda778a8e5 (patch)
treec417cd6f3c7fab96c46e01bf5091a918611b458a /drivers/gpu/drm/drm_mipi_dsi.c
parentfc903ebd50d0396b5de1ff614a009c2ddcb3222c (diff)
drm/dsi: Use mipi_dsi_device_register_full() for DSI device creation
Use mipi_dsi_device_register_full() for device creation. This takes in a struct mipi_dsi_device_info as a template to populate the DSI device information. The reason to introduce this is to have a way to create DSI devices not available via DT. Drivers that want to create a DSI device can populate a struct mipi_dsi_device_info and call this function. For DSI devices available via DT, of_mipi_dsi_device_add() is used as before, but this now calls mipi_dsi_device_register_full() internally. Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/drm/drm_mipi_dsi.c')
-rw-r--r--drivers/gpu/drm/drm_mipi_dsi.c64
1 files changed, 47 insertions, 17 deletions
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 4f2a70471e05..5d7243da2323 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -133,8 +133,8 @@ static int mipi_dsi_device_add(struct mipi_dsi_device *dsi)
static struct mipi_dsi_device *
of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node)
{
- struct mipi_dsi_device *dsi;
struct device *dev = host->dev;
+ struct mipi_dsi_device_info info = { };
int ret;
u32 reg;
@@ -145,39 +145,69 @@ of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node)
return ERR_PTR(-EINVAL);
}
- if (reg > 3) {
- dev_err(dev, "device node %s has invalid reg property: %u\n",
- node->full_name, reg);
+ info.channel = reg;
+ info.node = of_node_get(node);
+
+ return mipi_dsi_device_register_full(host, &info);
+}
+#else
+static struct mipi_dsi_device *
+of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node)
+{
+ return ERR_PTR(-ENODEV);
+}
+#endif
+
+/**
+ * mipi_dsi_device_register_full - create a MIPI DSI device
+ * @host: DSI host to which this device is connected
+ * @info: pointer to template containing DSI device information
+ *
+ * Create a MIPI DSI device by using the device information provided by
+ * mipi_dsi_device_info template
+ *
+ * Returns:
+ * A pointer to the newly created MIPI DSI device, or, a pointer encoded
+ * with an error
+ */
+struct mipi_dsi_device *
+mipi_dsi_device_register_full(struct mipi_dsi_host *host,
+ const struct mipi_dsi_device_info *info)
+{
+ struct mipi_dsi_device *dsi;
+ struct device *dev = host->dev;
+ int ret;
+
+ if (!info) {
+ dev_err(dev, "invalid mipi_dsi_device_info pointer\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (info->channel > 3) {
+ dev_err(dev, "invalid virtual channel: %u\n", info->channel);
return ERR_PTR(-EINVAL);
}
dsi = mipi_dsi_device_alloc(host);
if (IS_ERR(dsi)) {
- dev_err(dev, "failed to allocate DSI device %s: %ld\n",
- node->full_name, PTR_ERR(dsi));
+ dev_err(dev, "failed to allocate DSI device %ld\n",
+ PTR_ERR(dsi));
return dsi;
}
- dsi->dev.of_node = of_node_get(node);
- dsi->channel = reg;
+ dsi->dev.of_node = info->node;
+ dsi->channel = info->channel;
ret = mipi_dsi_device_add(dsi);
if (ret) {
- dev_err(dev, "failed to add DSI device %s: %d\n",
- node->full_name, ret);
+ dev_err(dev, "failed to add DSI device %d\n", ret);
kfree(dsi);
return ERR_PTR(ret);
}
return dsi;
}
-#else
-static struct mipi_dsi_device *
-of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node)
-{
- return ERR_PTR(-ENODEV);
-}
-#endif
+EXPORT_SYMBOL(mipi_dsi_device_register_full);
int mipi_dsi_host_register(struct mipi_dsi_host *host)
{