exynos_dp supports a simple bridge chain with ptn3460 bridge
and an LVDS panel attached to it.
This patch creates the bridge chain with ptn3460 as the head
of the list and panel_binder being the tail.
Also, DERER_PROBE for exynos_dp is tested with this patch.
Signed-off-by: Ajay Kumar <ajaykumar.rs at samsung.com>
---
.../devicetree/bindings/video/exynos_dp.txt | 2 +
drivers/gpu/drm/exynos/Kconfig | 1 +
drivers/gpu/drm/exynos/exynos_dp_core.c | 39 +++++++++++++++-----
drivers/gpu/drm/exynos/exynos_dp_core.h | 1 +
4 files changed, 34 insertions(+), 9 deletions(-)
diff --git a/Documentation/devicetree/bindings/video/exynos_dp.txt
b/Documentation/devicetree/bindings/video/exynos_dp.txt
index 53dbccf..0c118ff 100644
--- a/Documentation/devicetree/bindings/video/exynos_dp.txt
+++ b/Documentation/devicetree/bindings/video/exynos_dp.txt
@@ -51,6 +51,8 @@ Required properties for dp-controller:
LANE_COUNT1 = 1, LANE_COUNT2 = 2, LANE_COUNT4 = 4
- display-timings: timings for the connected panel as described by
Documentation/devicetree/bindings/video/display-timing.txt
+ -edp-panel:
+ phandle for the drm_panel node required by panel_binder.
Optional properties for dp-controller:
-interlaced:
diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
index 178d2a9..fd1c070 100644
--- a/drivers/gpu/drm/exynos/Kconfig
+++ b/drivers/gpu/drm/exynos/Kconfig
@@ -52,6 +52,7 @@ config DRM_EXYNOS_DP
bool "EXYNOS DRM DP driver support"
depends on DRM_EXYNOS_FIMD && ARCH_EXYNOS && (DRM_PTN3460=n ||
DRM_PTN3460=y || DRM_PTN3460=DRM_EXYNOS)
default DRM_EXYNOS
+ select DRM_PANEL
help
This enables support for DP device.
diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c
b/drivers/gpu/drm/exynos/exynos_dp_core.c
index 414f5e5..a608f5c 100644
--- a/drivers/gpu/drm/exynos/exynos_dp_core.c
+++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
@@ -28,7 +28,9 @@
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
+#include <drm/drm_panel.h>
#include <drm/bridge/ptn3460.h>
+#include <drm/bridge/panel_binder.h>
#include "exynos_drm_drv.h"
#include "exynos_dp_core.h"
@@ -983,7 +985,7 @@ static int exynos_drm_attach_lcd_bridge(struct
exynos_dp_device *dp,
struct drm_encoder *encoder)
{
struct bridge_init bridge;
- struct drm_bridge *bridge_chain = NULL;
+ struct drm_bridge *bridge_chain = NULL, *next = NULL;
bool connector_created = false;
if (find_bridge("nxp,ptn3460", &bridge)) {
@@ -991,6 +993,14 @@ static int exynos_drm_attach_lcd_bridge(struct
exynos_dp_device *dp,
bridge.node);
}
+ if (dp->edp_panel) {
+ next = panel_binder_init(dp->drm_dev, encoder, bridge.client,
+ bridge.node, dp->edp_panel, DRM_CONNECTOR_POLL_HPD);
+ if (next)
+ connector_created = true;
+ drm_bridge_add_to_chain(bridge_chain, next);
+ }
+
return connector_created;
}
@@ -1215,16 +1225,10 @@ static int exynos_dp_bind(struct device *dev, struct
device *master, void *data)
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *drm_dev = data;
struct resource *res;
- struct exynos_dp_device *dp;
+ struct exynos_dp_device *dp = exynos_dp_display.ctx;
unsigned int irq_flags;
-
int ret = 0;
- dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
- GFP_KERNEL);
- if (!dp)
- return -ENOMEM;
-
dp->dev = &pdev->dev;
dp->dpms_mode = DRM_MODE_DPMS_OFF;
@@ -1298,7 +1302,6 @@ static int exynos_dp_bind(struct device *dev, struct
device *master, void *data)
disable_irq(dp->irq);
dp->drm_dev = drm_dev;
- exynos_dp_display.ctx = dp;
platform_set_drvdata(pdev, &exynos_dp_display);
@@ -1325,6 +1328,9 @@ static const struct component_ops exynos_dp_ops = {
static int exynos_dp_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
+ struct device_node *panel_node;
+ struct exynos_dp_device *dp;
int ret;
ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR,
@@ -1332,6 +1338,21 @@ static int exynos_dp_probe(struct platform_device *pdev)
if (ret)
return ret;
+ dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
+ GFP_KERNEL);
+ if (!dp)
+ return -ENOMEM;
+
+ panel_node = of_parse_phandle(dev->of_node, "edp-panel", 0);
+ if (panel_node) {
+ dp->edp_panel = of_drm_find_panel(panel_node);
+ of_node_put(panel_node);
+ if (!dp->edp_panel)
+ return -EPROBE_DEFER;
+ }
+
+ exynos_dp_display.ctx = dp;
+
ret = component_add(&pdev->dev, &exynos_dp_ops);
if (ret)
exynos_drm_component_del(&pdev->dev,
diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.h
b/drivers/gpu/drm/exynos/exynos_dp_core.h
index 02cc4f9..26a64d3 100644
--- a/drivers/gpu/drm/exynos/exynos_dp_core.h
+++ b/drivers/gpu/drm/exynos/exynos_dp_core.h
@@ -149,6 +149,7 @@ struct exynos_dp_device {
struct drm_device *drm_dev;
struct drm_connector connector;
struct drm_encoder *encoder;
+ struct drm_panel *edp_panel;
struct clk *clock;
unsigned int irq;
void __iomem *reg_base;
--
1.7.9.5
