Add drm_panel calls to the driver to make the panel and bridge work together in tandem.
Signed-off-by: Ajay Kumar ajaykumar.rs@samsung.com --- .../devicetree/bindings/drm/bridge/ptn3460.txt | 12 ++++++ drivers/gpu/drm/bridge/Kconfig | 1 + drivers/gpu/drm/bridge/ptn3460.c | 42 ++++++++++++++++++++ 3 files changed, 55 insertions(+)
diff --git a/Documentation/devicetree/bindings/drm/bridge/ptn3460.txt b/Documentation/devicetree/bindings/drm/bridge/ptn3460.txt index 52b93b2..663fe6c 100644 --- a/Documentation/devicetree/bindings/drm/bridge/ptn3460.txt +++ b/Documentation/devicetree/bindings/drm/bridge/ptn3460.txt @@ -17,6 +17,11 @@ Required properties: | 6 | 1600x900 | ChiMei M215HGE | +-------+------------+------------------+
+ - video interfaces: Device node can contain video interface port + nodes for panel according to [1]. + +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt + Example: lvds-bridge@20 { compatible = "nxp,ptn3460"; @@ -24,4 +29,11 @@ Example: powerdown-gpio = <&gpy2 5 1 0 0>; reset-gpio = <&gpx1 5 1 0 0>; edid-emulation = <5>; + ports { + port@0 { + bridge_out: endpoint { + remote-endpoint = <&panel_in>; + }; + }; + }; }; diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 4254c2b..8b426e2 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -3,5 +3,6 @@ config DRM_PTN3460 depends on DRM depends on OF && I2C select DRM_KMS_HELPER + select DRM_PANEL ---help--- ptn3460 eDP-LVDS bridge chip driver. diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c index 7adeb60..e6d5ae7 100644 --- a/drivers/gpu/drm/bridge/ptn3460.c +++ b/drivers/gpu/drm/bridge/ptn3460.c @@ -19,6 +19,9 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/of_gpio.h> +#include <linux/of_graph.h> + +#include <drm/drm_panel.h>
#include "bridge/ptn3460.h"
@@ -38,6 +41,7 @@ struct ptn3460_bridge { struct i2c_client *client; struct drm_bridge bridge; struct edid *edid; + struct drm_panel *panel; int gpio_pd_n; int gpio_rst_n; u32 edid_emulation; @@ -137,6 +141,11 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge) gpio_set_value(ptn_bridge->gpio_rst_n, 1); }
+ if (drm_panel_prepare(ptn_bridge->panel)) { + DRM_ERROR("failed to prepare panel\n"); + return; + } + /* * There's a bug in the PTN chip where it falsely asserts hotplug before * it is fully functional. We're forced to wait for the maximum start up @@ -153,6 +162,12 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
static void ptn3460_enable(struct drm_bridge *bridge) { + struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge); + + if (drm_panel_enable(ptn_bridge->panel)) { + DRM_ERROR("failed to enable panel\n"); + return; + } }
static void ptn3460_disable(struct drm_bridge *bridge) @@ -164,6 +179,11 @@ static void ptn3460_disable(struct drm_bridge *bridge)
ptn_bridge->enabled = false;
+ if (drm_panel_disable(ptn_bridge->panel)) { + DRM_ERROR("failed to disable panel\n"); + return; + } + if (gpio_is_valid(ptn_bridge->gpio_rst_n)) gpio_set_value(ptn_bridge->gpio_rst_n, 1);
@@ -173,6 +193,12 @@ static void ptn3460_disable(struct drm_bridge *bridge)
static void ptn3460_post_disable(struct drm_bridge *bridge) { + struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge); + + if (drm_panel_unprepare(ptn_bridge->panel)) { + DRM_ERROR("failed to unprepare panel\n"); + return; + } }
static int ptn3460_get_modes(struct drm_connector *connector) @@ -267,6 +293,9 @@ int ptn3460_bridge_attach(struct drm_bridge *bridge) drm_mode_connector_attach_encoder(&ptn_bridge->connector, bridge->encoder);
+ if (ptn_bridge->panel) + drm_panel_attach(ptn_bridge->panel, &ptn_bridge->connector); + return ret; }
@@ -283,6 +312,7 @@ static int ptn3460_probe(struct i2c_client *client, { struct device *dev = &client->dev; struct ptn3460_bridge *ptn_bridge; + struct device_node *endpoint, *panel_node; int ret;
ptn_bridge = devm_kzalloc(dev, sizeof(*ptn_bridge), GFP_KERNEL); @@ -290,6 +320,17 @@ static int ptn3460_probe(struct i2c_client *client, return -ENOMEM; }
+ endpoint = of_graph_get_next_endpoint(dev->of_node, NULL); + if (endpoint) { + panel_node = of_graph_get_remote_port_parent(endpoint); + if (panel_node) { + ptn_bridge->panel = of_drm_find_panel(panel_node); + of_node_put(panel_node); + if (!ptn_bridge->panel) + return -EPROBE_DEFER; + } + } + ptn_bridge->client = client; ptn_bridge->gpio_pd_n = of_get_named_gpio(dev->of_node, "powerdown-gpio", 0); @@ -327,6 +368,7 @@ static int ptn3460_probe(struct i2c_client *client, }
ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs; + ptn_bridge->bridge.of_node = dev->of_node; ret = drm_bridge_add(&ptn_bridge->bridge); if (ret) { DRM_ERROR("Failed to add bridge\n");