Add drm_panel controls to support powerup/down of the
eDP panel, if one is present at the sink side.
Signed-off-by: Ajay Kumar <ajaykumar.rs@xxxxxxxxxxx>
---
.../devicetree/bindings/video/exynos_dp.txt | 2 +
drivers/gpu/drm/exynos/Kconfig | 1 +
drivers/gpu/drm/exynos/exynos_dp_core.c | 45 ++++++++++++++++----
drivers/gpu/drm/exynos/exynos_dp_core.h | 2 +
4 files changed, 41 insertions(+), 9 deletions(-)
diff --git a/Documentation/devicetree/bindings/video/exynos_dp.txt b/Documentation/devicetree/bindings/video/exynos_dp.txt
index 53dbccf..c029a09 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 edp/lvds drm_panel node.
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 a94b114..b3d0d9b 100644
--- a/drivers/gpu/drm/exynos/exynos_dp_core.c
+++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
@@ -28,6 +28,7 @@
#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 "exynos_drm_drv.h"
@@ -1029,6 +1030,9 @@ static int exynos_dp_create_connector(struct exynos_drm_display *display,
drm_connector_register(connector);
drm_mode_connector_attach_encoder(connector, encoder);
+ if (dp->edp_panel)
+ drm_panel_attach(dp->edp_panel, &dp->connector);
+
return 0;
}
@@ -1063,11 +1067,13 @@ static void exynos_dp_poweron(struct exynos_dp_device *dp)
if (dp->dpms_mode == DRM_MODE_DPMS_ON)
return;
+ drm_panel_prepare(dp->edp_panel);
clk_prepare_enable(dp->clock);
exynos_dp_phy_init(dp);
exynos_dp_init_dp(dp);
enable_irq(dp->irq);
exynos_dp_setup(dp);
+ drm_panel_enable(dp->edp_panel);
}
static void exynos_dp_poweroff(struct exynos_dp_device *dp)
@@ -1075,10 +1081,12 @@ static void exynos_dp_poweroff(struct exynos_dp_device *dp)
if (dp->dpms_mode != DRM_MODE_DPMS_ON)
return;
+ drm_panel_disable(dp->edp_panel);
disable_irq(dp->irq);
flush_work(&dp->hotplug_work);
exynos_dp_phy_exit(dp);
clk_disable_unprepare(dp->clock);
+ drm_panel_unprepare(dp->edp_panel);
}
static void exynos_dp_dpms(struct exynos_drm_display *display, int mode)
@@ -1209,8 +1217,17 @@ err:
static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
{
int ret;
+ struct device_node *videomode_parent;
+
+ /* Receive video timing info from panel node
+ * if there is a panel node
+ */
+ if (dp->panel_node)
+ videomode_parent = dp->panel_node;
+ else
+ videomode_parent = dp->dev->of_node;
- ret = of_get_videomode(dp->dev->of_node, &dp->panel.vm,
+ ret = of_get_videomode(videomode_parent, &dp->panel.vm,
OF_USE_NATIVE_MODE);
if (ret) {
DRM_ERROR("failed: of_get_videomode() : %d\n", ret);
@@ -1224,16 +1241,10 @@ 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;
@@ -1307,7 +1318,6 @@ 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);
@@ -1334,6 +1344,8 @@ static const struct component_ops exynos_dp_ops = {
static int exynos_dp_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
+ struct exynos_dp_device *dp;
int ret;
ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR,
@@ -1341,6 +1353,21 @@ 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;
+
+ dp->panel_node = of_parse_phandle(dev->of_node, "edp-panel", 0);
+ if (dp->panel_node) {
+ dp->edp_panel = of_drm_find_panel(dp->panel_node);
+ of_node_put(dp->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..3c29e4e 100644
--- a/drivers/gpu/drm/exynos/exynos_dp_core.h
+++ b/drivers/gpu/drm/exynos/exynos_dp_core.h
@@ -146,9 +146,11 @@ struct link_train {
struct exynos_dp_device {
struct device *dev;
+ struct device_node *panel_node;
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
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