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Date: Fri, 12 Feb 2016 14:48:31 +0530
From: Archit Taneja <architt@...eaurora.org>
To: dri-devel@...ts.freedesktop.org, treding@...dia.com
Cc: linux-kernel@...r.kernel.org, a.hajda@...sung.com,
airlied@...ux.ie, daniel@...ll.ch, l.stach@...gutronix.de,
robh@...nel.org, linux-arm-msm@...r.kernel.org,
jani.nikula@...ux.intel.com, Archit Taneja <architt@...eaurora.org>
Subject: [PATCH v5 2/5] drm/dsi: Use mipi_dsi_device_register_full for DSI device creation
Use mipi_dsi_device_register_full for device creation. This takes in
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
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@...eaurora.org>
---
drivers/gpu/drm/drm_mipi_dsi.c | 64 +++++++++++++++++++++++++++++++-----------
include/drm/drm_mipi_dsi.h | 16 +++++++++++
2 files changed, 63 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 4f2a704..5d7243d 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)
{
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 1b3b1f8..ce5eae43 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -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);
--
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