The Exynos DP transmitter is treated as an end entity in the display pipeline
and made this RFC patch compliant with CDF.
Any suggestions are welcome.
Signed-off-by: Leela Krishna Amudala <l.krishna@xxxxxxxxxxx>
---
drivers/video/display/display-core.c | 2 +-
drivers/video/exynos/exynos_dp_core.c | 88 +++++++++++++++++++++++++++++++++++
drivers/video/exynos/exynos_dp_core.h | 6 +++
3 files changed, 95 insertions(+), 1 deletion(-)
diff --git a/drivers/video/display/display-core.c b/drivers/video/display/display-core.c
index 5f8be30..dbad7e9 100644
--- a/drivers/video/display/display-core.c
+++ b/drivers/video/display/display-core.c
@@ -15,7 +15,7 @@
#include <linux/list.h>
#include <linux/module.h>
#include <linux/mutex.h>
-#include <linux/videomode.h>
+#include <video/videomode.h>
#include <video/display.h>
diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c
index 4ef18e2..0f8de27b 100644
--- a/drivers/video/exynos/exynos_dp_core.c
+++ b/drivers/video/exynos/exynos_dp_core.c
@@ -23,6 +23,9 @@
#include <video/exynos_dp.h>
#include "exynos_dp_core.h"
+#include <video/videomode.h>
+#include <video/display.h>
+#define to_panel(p) container_of(p, struct exynos_dp_device, entity)
static int exynos_dp_init_dp(struct exynos_dp_device *dp)
{
@@ -1033,6 +1036,81 @@ static void exynos_dp_phy_exit(struct exynos_dp_device *dp)
}
#endif /* CONFIG_OF */
+static int exynos_dp_power_on(struct exynos_dp_device *dp)
+{
+ struct platform_device *pdev = to_platform_device(dp->dev);
+ struct exynos_dp_platdata *pdata = pdev->dev.platform_data;
+
+ if (dp->dev->of_node) {
+ if (dp->phy_addr)
+ exynos_dp_phy_init(dp);
+ } else {
+ if (pdata->phy_init)
+ pdata->phy_init();
+ }
+
+ clk_prepare_enable(dp->clock);
+ exynos_dp_init_dp(dp);
+ enable_irq(dp->irq);
+
+ return 0;
+}
+
+static int dp_set_state(struct display_entity *entity,
+ enum display_entity_state state)
+{
+ struct exynos_dp_device *dp = to_panel(entity);
+ struct platform_device *pdev = to_platform_device(dp->dev);
+ int ret = 0;
+
+ switch (state) {
+ case DISPLAY_ENTITY_STATE_OFF:
+ case DISPLAY_ENTITY_STATE_STANDBY:
+ ret = exynos_dp_remove(pdev);
+ break;
+ case DISPLAY_ENTITY_STATE_ON:
+ ret = exynos_dp_power_on(dp);
+ break;
+ }
+ return ret;
+}
+
+static int dp_get_modes(struct display_entity *entity,
+ const struct videomode **modes)
+{
+ /* Rework has to be done here*/
+ return 1;
+}
+
+static int dp_get_size(struct display_entity *entity,
+ unsigned int *width, unsigned int *height)
+{
+ struct exynos_dp_device *dp = to_panel(entity);
+ struct platform_device *pdev = to_platform_device(dp->dev);
+ /*getting pdata in older way, rework has to be done here to
+ parse it from dt node */
+ struct exynos_dp_platdata *pdata = pdev->dev.platform_data;
+
+ /*Rework has to be done here */
+ *width = 1280;
+ *height = 800;
+ return 0;
+}
+
+static int dp_update(struct display_entity *entity,
+ void (*callback)(int, void *), void *data)
+{
+ /*Rework has to be done here*/
+ return 0;
+}
+
+static const struct display_entity_control_ops dp_control_ops = {
+ .set_state = dp_set_state,
+ .get_modes = dp_get_modes,
+ .get_size = dp_get_size,
+ .update = dp_update,
+};
+
static int exynos_dp_probe(struct platform_device *pdev)
{
struct resource *res;
@@ -1111,6 +1189,16 @@ static int exynos_dp_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, dp);
+ /* setup panel entity */
+ dp->entity.dev = &pdev->dev;
+ dp->entity.release = exynos_dp_remove;
+ dp->entity.ops = &dp_control_ops;
+
+ ret = display_entity_register(&dp->entity);
+ if (ret < 0) {
+ pr_err("failed to register display entity\n");
+ return ret;
+ }
return 0;
}
diff --git a/drivers/video/exynos/exynos_dp_core.h b/drivers/video/exynos/exynos_dp_core.h
index 6c567bb..eb18c10 100644
--- a/drivers/video/exynos/exynos_dp_core.h
+++ b/drivers/video/exynos/exynos_dp_core.h
@@ -13,6 +13,8 @@
#ifndef _EXYNOS_DP_CORE_H
#define _EXYNOS_DP_CORE_H
+#include <video/display.h>
+
enum dp_irq_type {
DP_IRQ_TYPE_HP_CABLE_IN,
DP_IRQ_TYPE_HP_CABLE_OUT,
@@ -42,6 +44,7 @@ struct exynos_dp_device {
struct video_info *video_info;
struct link_train link_train;
struct work_struct hotplug_work;
+ struct display_entity entity;
};
/* exynos_dp_reg.c */
@@ -133,6 +136,9 @@ void exynos_dp_config_video_slave_mode(struct exynos_dp_device *dp);
void exynos_dp_enable_scrambling(struct exynos_dp_device *dp);
void exynos_dp_disable_scrambling(struct exynos_dp_device *dp);
+static int exynos_dp_power_on(struct exynos_dp_device *dp);
+static int exynos_dp_remove(struct platform_device *pdev);
+
/* I2C EDID Chip ID, Slave Address */
#define I2C_EDID_DEVICE_ADDR 0x50
#define I2C_E_EDID_DEVICE_ADDR 0x30
--
1.8.0
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