drm/bridge: ptn3460: support drm_panel
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>
Acked-by: Inki Dae <inki.dae@samsung.com>
Tested-by: Rahul Sharma <rahul.sharma@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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 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 @@
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_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 @@
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_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 @@
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 @@
{
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 @@
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 @@
}
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");