MIC must be initilized by MIPI DSI when it is being bound.
Signed-off-by: Hyungwon Hwang human.hwang@samsung.com --- Changes for v2: - None
Changes for v3: - None
Changes for v4: - None
Changes for v5: - None .../devicetree/bindings/video/exynos_dsim.txt | 23 ++++++++++++++++++--- drivers/gpu/drm/exynos/exynos_drm_dsi.c | 24 ++++++++++++++++++++++ 2 files changed, 44 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/video/exynos_dsim.txt b/Documentation/devicetree/bindings/video/exynos_dsim.txt index 11ccac9..0be0362 100644 --- a/Documentation/devicetree/bindings/video/exynos_dsim.txt +++ b/Documentation/devicetree/bindings/video/exynos_dsim.txt @@ -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>; diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index ddcb77e..d5a3baf 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -20,6 +20,7 @@ #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> @@ -286,6 +287,7 @@ 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) @@ -1776,7 +1778,22 @@ 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);
@@ -1789,6 +1806,7 @@ 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); @@ -1798,6 +1816,12 @@ 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); }
-- 1.9.1