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drm/dsi: Use mipi_dsi_device_register_full() for DSI device creation

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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>
This commit is contained in:
Archit Taneja 2016-02-12 14:48:31 +05:30 committed by Thierry Reding
parent fc903ebd50
commit c63ae8a968
2 changed files with 71 additions and 25 deletions
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80
drivers/gpu/drm/drm_mipi_dsi.c
View File

@ -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;
@ -145,31 +145,10 @@ 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);
return ERR_PTR(-EINVAL);
}
info.channel = reg;
info.node = of_node_get(node);
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));
return dsi;
}
dsi->dev.of_node = of_node_get(node);
dsi->channel = reg;
ret = mipi_dsi_device_add(dsi);
if (ret) {
dev_err(dev, "failed to add DSI device %s: %d\n",
node->full_name, ret);
kfree(dsi);
return ERR_PTR(ret);
}
return dsi;
return mipi_dsi_device_register_full(host, &info);
}
#else
static struct mipi_dsi_device *
@ -179,6 +158,57 @@ of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node)
}
#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 %ld\n",
PTR_ERR(dsi));
return dsi;
}
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 %d\n", ret);
kfree(dsi);
return ERR_PTR(ret);
}
return dsi;
}
EXPORT_SYMBOL(mipi_dsi_device_register_full);
int mipi_dsi_host_register(struct mipi_dsi_host *host)
{
struct device_node *node;

16
include/drm/drm_mipi_dsi.h
View File

@ -139,6 +139,19 @@ enum mipi_dsi_pixel_format {
MIPI_DSI_FMT_RGB565,
};
/**
* struct mipi_dsi_device_info - template for creating a mipi_dsi_device
* @channel: DSI virtual channel assigned to peripheral
* @node: pointer to OF device node
*
* This is populated and passed to mipi_dsi_device_new to create a new
* DSI device
*/
struct mipi_dsi_device_info {
u32 channel;
struct device_node *node;
};
/**
* struct mipi_dsi_device - DSI peripheral device
* @host: DSI host for this peripheral
@ -188,6 +201,9 @@ static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt)
return -EINVAL;
}
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 *of_find_mipi_dsi_device_by_node(struct device_node *np);
int mipi_dsi_attach(struct mipi_dsi_device *dsi);
int mipi_dsi_detach(struct mipi_dsi_device *dsi);