[media] s5p-cec: add cec-notifier support, move out of staging

By using the CEC notifier framework there is no longer any reason
to manually set the physical address. This was the one blocking
issue that prevented this driver from going out of staging, so do
this move as well.

Update the bindings documenting the new hdmi phandle and
update exynos4.dtsi accordingly.

Tested with my Odroid U3.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
CC: linux-samsung-soc@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

12 files changed, 44 insertions, 24 deletions

diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index e252b27..7321f61 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -466,6 +466,16 @@ menuconfig V4L_CEC_DRIVERS
 
 if V4L_CEC_DRIVERS
 
+config VIDEO_SAMSUNG_S5P_CEC
+       tristate "Samsung S5P CEC driver"
+       depends on VIDEO_DEV && MEDIA_CEC_SUPPORT && (PLAT_S5P || ARCH_EXYNOS || COMPILE_TEST)
+       select MEDIA_CEC_NOTIFIER
+       ---help---
+         This is a driver for Samsung S5P HDMI CEC interface. It uses the
+         generic CEC framework interface.
+         CEC bus is present in the HDMI connector and enables communication
+         between compatible devices.
+
 config VIDEO_STI_HDMI_CEC
        tristate "STMicroelectronics STiH4xx HDMI CEC driver"
        depends on VIDEO_DEV && MEDIA_CEC_SUPPORT && (ARCH_STI || COMPILE_TEST)
diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
index 057422c..ce59af5 100644
--- a/drivers/media/platform/Makefile
+++ b/drivers/media/platform/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG)	+= s5p-jpeg/
 obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC)	+= s5p-mfc/
 
 obj-$(CONFIG_VIDEO_SAMSUNG_S5P_G2D)	+= s5p-g2d/
+obj-$(CONFIG_VIDEO_SAMSUNG_S5P_CEC)	+= s5p-cec/
 obj-$(CONFIG_VIDEO_SAMSUNG_EXYNOS_GSC)	+= exynos-gsc/
 
 obj-$(CONFIG_VIDEO_STI_BDISP)		+= sti/bdisp/
diff --git a/drivers/staging/media/s5p-cec/Makefile b/drivers/media/platform/s5p-cec/Makefile
index 0e2cf45..0e2cf45 100644
--- a/drivers/staging/media/s5p-cec/Makefile
+++ b/drivers/media/platform/s5p-cec/Makefile
diff --git a/drivers/staging/media/s5p-cec/exynos_hdmi_cec.h b/drivers/media/platform/s5p-cec/exynos_hdmi_cec.h
index 7d94535..7d94535 100644
--- a/drivers/staging/media/s5p-cec/exynos_hdmi_cec.h
+++ b/drivers/media/platform/s5p-cec/exynos_hdmi_cec.h
diff --git a/drivers/staging/media/s5p-cec/exynos_hdmi_cecctrl.c b/drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c
index 1edf667..1edf667 100644
--- a/drivers/staging/media/s5p-cec/exynos_hdmi_cecctrl.c
+++ b/drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c
diff --git a/drivers/staging/media/s5p-cec/regs-cec.h b/drivers/media/platform/s5p-cec/regs-cec.h
index b2e7e12..b2e7e12 100644
--- a/drivers/staging/media/s5p-cec/regs-cec.h
+++ b/drivers/media/platform/s5p-cec/regs-cec.h
diff --git a/drivers/staging/media/s5p-cec/s5p_cec.c b/drivers/media/platform/s5p-cec/s5p_cec.c
index a30b80a..4688f08 100644
--- a/drivers/staging/media/s5p-cec/s5p_cec.c
+++ b/drivers/media/platform/s5p-cec/s5p_cec.c
@@ -19,11 +19,14 @@
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/timer.h>
 #include <linux/workqueue.h>
 #include <media/cec.h>
+#include <media/cec-edid.h>
+#include <media/cec-notifier.h>
 
 #include "exynos_hdmi_cec.h"
 #include "regs-cec.h"
@@ -167,10 +170,22 @@ static const struct cec_adap_ops s5p_cec_adap_ops = {
 static int s5p_cec_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct device_node *np;
+	struct platform_device *hdmi_dev;
 	struct resource *res;
 	struct s5p_cec_dev *cec;
 	int ret;
 
+	np = of_parse_phandle(pdev->dev.of_node, "hdmi-phandle", 0);
+
+	if (!np) {
+		dev_err(&pdev->dev, "Failed to find hdmi node in device tree\n");
+		return -ENODEV;
+	}
+	hdmi_dev = of_find_device_by_node(np);
+	if (hdmi_dev == NULL)
+		return -EPROBE_DEFER;
+
 	cec = devm_kzalloc(&pdev->dev, sizeof(*cec), GFP_KERNEL);
 	if (!cec)
 		return -ENOMEM;
@@ -200,24 +215,33 @@ static int s5p_cec_probe(struct platform_device *pdev)
 	if (IS_ERR(cec->reg))
 		return PTR_ERR(cec->reg);
 
+	cec->notifier = cec_notifier_get(&hdmi_dev->dev);
+	if (cec->notifier == NULL)
+		return -ENOMEM;
+
 	cec->adap = cec_allocate_adapter(&s5p_cec_adap_ops, cec,
 		CEC_NAME,
-		CEC_CAP_PHYS_ADDR | CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT |
+		CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT |
 		CEC_CAP_PASSTHROUGH | CEC_CAP_RC, 1);
 	ret = PTR_ERR_OR_ZERO(cec->adap);
 	if (ret)
 		return ret;
+
 	ret = cec_register_adapter(cec->adap, &pdev->dev);
-	if (ret) {
-		cec_delete_adapter(cec->adap);
-		return ret;
-	}
+	if (ret)
+		goto err_delete_adapter;
+
+	cec_register_cec_notifier(cec->adap, cec->notifier);
 
 	platform_set_drvdata(pdev, cec);
 	pm_runtime_enable(dev);
 
 	dev_dbg(dev, "successfuly probed\n");
 	return 0;
+
+err_delete_adapter:
+	cec_delete_adapter(cec->adap);
+	return ret;
 }
 
 static int s5p_cec_remove(struct platform_device *pdev)
@@ -225,6 +249,7 @@ static int s5p_cec_remove(struct platform_device *pdev)
 	struct s5p_cec_dev *cec = platform_get_drvdata(pdev);
 
 	cec_unregister_adapter(cec->adap);
+	cec_notifier_put(cec->notifier);
 	pm_runtime_disable(&pdev->dev);
 	return 0;
 }
diff --git a/drivers/staging/media/s5p-cec/s5p_cec.h b/drivers/media/platform/s5p-cec/s5p_cec.h
index 03732c1..7015845 100644
--- a/drivers/staging/media/s5p-cec/s5p_cec.h
+++ b/drivers/media/platform/s5p-cec/s5p_cec.h
@@ -59,12 +59,15 @@ enum cec_state {
 	STATE_ERROR
 };
 
+struct cec_notifier;
+
 struct s5p_cec_dev {
 	struct cec_adapter	*adap;
 	struct clk		*clk;
 	struct device		*dev;
 	struct mutex		lock;
 	struct regmap           *pmu;
+	struct cec_notifier	*notifier;
 	int			irq;
 	void __iomem		*reg;
 
diff --git a/drivers/staging/media/Kconfig b/drivers/staging/media/Kconfig
index 28088de..8ed8202 100644
--- a/drivers/staging/media/Kconfig
+++ b/drivers/staging/media/Kconfig
@@ -29,8 +29,6 @@ source "drivers/staging/media/omap4iss/Kconfig"
 
 source "drivers/staging/media/platform/bcm2835/Kconfig"
 
-source "drivers/staging/media/s5p-cec/Kconfig"
-
 # Keep LIRC at the end, as it has sub-menus
 source "drivers/staging/media/lirc/Kconfig"
 
diff --git a/drivers/staging/media/Makefile b/drivers/staging/media/Makefile
index 75e47dc..3a6adea 100644
--- a/drivers/staging/media/Makefile
+++ b/drivers/staging/media/Makefile
@@ -1,5 +1,4 @@
 obj-$(CONFIG_I2C_BCM2048)	+= bcm2048/
-obj-$(CONFIG_VIDEO_SAMSUNG_S5P_CEC) += s5p-cec/
 obj-$(CONFIG_DVB_CXD2099)	+= cxd2099/
 obj-$(CONFIG_LIRC_STAGING)	+= lirc/
 obj-$(CONFIG_VIDEO_BCM2835)	+= platform/bcm2835/
diff --git a/drivers/staging/media/s5p-cec/Kconfig b/drivers/staging/media/s5p-cec/Kconfig
deleted file mode 100644
index 7a3489d..0000000
--- a/drivers/staging/media/s5p-cec/Kconfig
+++ /dev/null
@@ -1,9 +0,0 @@
-config VIDEO_SAMSUNG_S5P_CEC
-       tristate "Samsung S5P CEC driver"
-       depends on VIDEO_DEV && MEDIA_CEC_SUPPORT && (ARCH_EXYNOS || COMPILE_TEST)
-       ---help---
-         This is a driver for Samsung S5P HDMI CEC interface. It uses the
-         generic CEC framework interface.
-         CEC bus is present in the HDMI connector and enables communication
-         between compatible devices.
-
diff --git a/drivers/staging/media/s5p-cec/TODO b/drivers/staging/media/s5p-cec/TODO
deleted file mode 100644
index 64f21ba..0000000
--- a/drivers/staging/media/s5p-cec/TODO
+++ /dev/null
@@ -1,7 +0,0 @@
-This driver requires that userspace sets the physical address.
-However, this should be passed on from the corresponding
-Samsung HDMI driver.
-
-We have to wait until the HDMI notifier framework has been merged
-in order to handle this gracefully, until that time this driver
-has to remain in staging.