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drm/exynos: dsi: add support for MIC driver as a bridge

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MIC must be initilized by MIPI DSI when it is being bound.

Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Hyungwon Hwang 2015-06-12 21:59:08 +09:00 committed by Inki Dae
parent e6f988a458
commit f5f3b9ba92
2 changed files with 44 additions and 3 deletions
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23
Documentation/devicetree/bindings/video/exynos_dsim.txt
View File

@ -32,10 +32,19 @@ Video interfaces:
Device node can contain video interface port nodes according to [2].
The following are properties specific to those nodes:
port node:
- reg: (required) can be 0 for input RGB/I80 port or 1 for DSI port;
port node inbound:
- reg: (required) must be 0.
port node outbound:
- reg: (required) must be 1.
endpoint node of DSI port (reg = 1):
endpoint node connected from mic node (reg = 0):
- remote-endpoint: specifies the endpoint in mic node. This node is required
for Exynos5433 mipi dsi. So mic can access to panel node
thoughout this dsi node.
endpoint node connected to panel node (reg = 1):
- remote-endpoint: specifies the endpoint in panel node. This node is
required in all kinds of exynos mipi dsi to represent
the connection between mipi dsi and panel.
- samsung,burst-clock-frequency: specifies DSI frequency in high-speed burst
mode
- samsung,esc-clock-frequency: specifies DSI frequency in escape mode
@ -74,7 +83,15 @@ Example:
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
decon_to_mic: endpoint {
remote-endpoint = <&mic_to_decon>;
};
};
port@1 {
reg = <1>;
dsi_ep: endpoint {
reg = <0>;
samsung,burst-clock-frequency = <500000000>;

24
drivers/gpu/drm/exynos/exynos_drm_dsi.c
View File

@ -21,6 +21,7 @@
#include <linux/irq.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/of_graph.h>
#include <linux/phy/phy.h>
#include <linux/regulator/consumer.h>
#include <linux/component.h>
@ -288,6 +289,7 @@ struct exynos_dsi {
struct list_head transfer_list;
struct exynos_dsi_driver_data *driver_data;
struct device_node *bridge_node;
};
#define host_to_dsi(host) container_of(host, struct exynos_dsi, dsi_host)
@ -1794,7 +1796,22 @@ static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
ret = exynos_dsi_of_read_u32(ep, "samsung,esc-clock-frequency",
&dsi->esc_clk_rate);
if (ret < 0)
goto end;
of_node_put(ep);
ep = of_graph_get_next_endpoint(node, NULL);
if (!ep) {
ret = -ENXIO;
goto end;
}
dsi->bridge_node = of_graph_get_remote_port_parent(ep);
if (!dsi->bridge_node) {
ret = -ENXIO;
goto end;
}
end:
of_node_put(ep);
@ -1807,6 +1824,7 @@ static int exynos_dsi_bind(struct device *dev, struct device *master,
struct exynos_drm_display *display = dev_get_drvdata(dev);
struct exynos_dsi *dsi = display_to_dsi(display);
struct drm_device *drm_dev = data;
struct drm_bridge *bridge;
int ret;
ret = exynos_drm_create_enc_conn(drm_dev, display);
@ -1816,6 +1834,12 @@ static int exynos_dsi_bind(struct device *dev, struct device *master,
return ret;
}
bridge = of_drm_find_bridge(dsi->bridge_node);
if (bridge) {
display->encoder->bridge = bridge;
drm_bridge_attach(drm_dev, bridge);
}
return mipi_dsi_host_register(&dsi->dsi_host);
}