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>
---
drivers/gpu/drm/exynos/Kconfig | 1 +
drivers/gpu/drm/exynos/exynos_dp_core.c | 88 ++++++++++++++++++++++++-------
drivers/gpu/drm/exynos/exynos_dp_core.h | 3 +-
3 files changed, 71 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
index 9ba1aae..7f9f6f9 100644
--- a/drivers/gpu/drm/exynos/Kconfig
+++ b/drivers/gpu/drm/exynos/Kconfig
@@ -53,6 +53,7 @@ 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 4b6ad95..49356cc 100644
--- a/drivers/gpu/drm/exynos/exynos_dp_core.c
+++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
@@ -16,7 +16,6 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/interrupt.h>
-#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/gpio.h>
@@ -28,6 +27,7 @@
#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"
@@ -41,7 +41,7 @@ struct bridge_init {
struct device_node *node;
};
-static int exynos_dp_init_dp(struct exynos_dp_device *dp)
+static void exynos_dp_init_dp(struct exynos_dp_device *dp)
{
exynos_dp_reset(dp);
@@ -58,8 +58,6 @@ static int exynos_dp_init_dp(struct exynos_dp_device *dp)
exynos_dp_init_hpd(dp);
exynos_dp_init_aux(dp);
-
- return 0;
}
static int exynos_dp_detect_hpd(struct exynos_dp_device *dp)
@@ -887,6 +885,12 @@ static void exynos_dp_commit(struct exynos_drm_display *display)
struct exynos_dp_device *dp = display->ctx;
int ret;
+ /* Keep backlight disabled while we configure video */
+ if (dp->panel) {
+ if (drm_panel_disable(dp->panel))
+ DRM_ERROR("failed to disable panel backlight\n");
+ }
+
ret = exynos_dp_detect_hpd(dp);
if (ret) {
/* Cable has been disconnected, we're done */
@@ -917,6 +921,12 @@ static void exynos_dp_commit(struct exynos_drm_display *display)
ret = exynos_dp_config_video(dp);
if (ret)
dev_err(dp->dev, "unable to config video\n");
+
+ /* Safe to turn on backlight now */
+ if (dp->panel) {
+ if (drm_panel_enable(dp->panel))
+ DRM_ERROR("failed to enable panel backlight\n");
+ }
}
static enum drm_connector_status exynos_dp_detect(
@@ -941,15 +951,18 @@ static int exynos_dp_get_modes(struct drm_connector *connector)
struct exynos_dp_device *dp = ctx_from_connector(connector);
struct drm_display_mode *mode;
+ if (dp->panel)
+ return drm_panel_get_modes(dp->panel);
+
mode = drm_mode_create(connector->dev);
if (!mode) {
DRM_ERROR("failed to create a new display mode.\n");
return 0;
}
- drm_display_mode_from_videomode(&dp->panel.vm, mode);
- mode->width_mm = dp->panel.width_mm;
- mode->height_mm = dp->panel.height_mm;
+ drm_display_mode_from_videomode(&dp->priv.vm, mode);
+ mode->width_mm = dp->priv.width_mm;
+ mode->height_mm = dp->priv.height_mm;
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
@@ -1029,7 +1042,10 @@ static int exynos_dp_create_connector(struct exynos_drm_display *display,
drm_connector_register(connector);
drm_mode_connector_attach_encoder(connector, encoder);
- return 0;
+ if (dp->panel)
+ ret = drm_panel_attach(dp->panel, &dp->connector);
+
+ return ret;
}
static void exynos_dp_phy_init(struct exynos_dp_device *dp)
@@ -1065,6 +1081,13 @@ static void exynos_dp_poweron(struct exynos_drm_display *display)
if (dp->dpms_mode == DRM_MODE_DPMS_ON)
return;
+ if (dp->panel) {
+ if (drm_panel_prepare(dp->panel)) {
+ DRM_ERROR("failed to powerup the panel\n");
+ return;
+ }
+ }
+
clk_prepare_enable(dp->clock);
exynos_dp_phy_init(dp);
exynos_dp_init_dp(dp);
@@ -1079,10 +1102,22 @@ static void exynos_dp_poweroff(struct exynos_drm_display *display)
if (dp->dpms_mode != DRM_MODE_DPMS_ON)
return;
+ if (dp->panel) {
+ if (drm_panel_disable(dp->panel)) {
+ DRM_ERROR("failed to disable panel backlight\n");
+ return;
+ }
+ }
+
disable_irq(dp->irq);
flush_work(&dp->hotplug_work);
exynos_dp_phy_exit(dp);
clk_disable_unprepare(dp->clock);
+
+ if (dp->panel) {
+ if (drm_panel_unprepare(dp->panel))
+ DRM_ERROR("failed to powerdown the panel\n");
+ }
}
static void exynos_dp_dpms(struct exynos_drm_display *display, int mode)
@@ -1215,7 +1250,7 @@ static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
{
int ret;
- ret = of_get_videomode(dp->dev->of_node, &dp->panel.vm,
+ ret = of_get_videomode(dp->dev->of_node, &dp->priv.vm,
OF_USE_NATIVE_MODE);
if (ret) {
DRM_ERROR("failed: of_get_videomode() : %d\n", ret);
@@ -1229,16 +1264,10 @@ 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;
@@ -1250,9 +1279,11 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
if (ret)
return ret;
- ret = exynos_dp_dt_parse_panel(dp);
- if (ret)
- return ret;
+ if (!dp->panel) {
+ ret = exynos_dp_dt_parse_panel(dp);
+ if (ret)
+ return ret;
+ }
dp->clock = devm_clk_get(&pdev->dev, "dp");
if (IS_ERR(dp->clock)) {
@@ -1312,7 +1343,6 @@ 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);
@@ -1339,6 +1369,9 @@ 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,
@@ -1346,6 +1379,21 @@ 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, "panel", 0);
+ if (panel_node) {
+ dp->panel = of_drm_find_panel(panel_node);
+ of_node_put(panel_node);
+ if (!dp->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..a1aee69 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 *panel;
struct clk *clock;
unsigned int irq;
void __iomem *reg_base;
@@ -162,7 +163,7 @@ struct exynos_dp_device {
int dpms_mode;
int hpd_gpio;
- struct exynos_drm_panel_info panel;
+ struct exynos_drm_panel_info priv;
};
/* exynos_dp_reg.c */
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
