omapfb: implement vsync sysfs, make uevents optional

Change-Id: I0e5ee71131dde198b5995f12e9f6a38205744237

8 files changed, 52 insertions, 0 deletions

diff --git a/arch/arm/configs/cyanogenmod_p3100_defconfig b/arch/arm/configs/cyanogenmod_p3100_defconfig
index 91c90c89c95..2ce7db87639 100644
--- a/arch/arm/configs/cyanogenmod_p3100_defconfig
+++ b/arch/arm/configs/cyanogenmod_p3100_defconfig
@@ -1707,6 +1707,8 @@ CONFIG_OMAP2_DSS_SLEEP_AFTER_VENC_RESET=y
 CONFIG_FB_OMAP2=y
 CONFIG_FB_OMAP2_DEBUG_SUPPORT=y
 CONFIG_FB_OMAP2_NUM_FBS=2
+# CONFIG_FB_OMAP2_VSYNC_SEND_UEVENTS is not set
+CONFIG_FB_OMAP2_VSYNC_SYSFS=y
 
 #
 # OMAP2/3 Display Device Drivers
diff --git a/arch/arm/configs/cyanogenmod_p3110_defconfig b/arch/arm/configs/cyanogenmod_p3110_defconfig
index 91c90c89c95..2ce7db87639 100644
--- a/arch/arm/configs/cyanogenmod_p3110_defconfig
+++ b/arch/arm/configs/cyanogenmod_p3110_defconfig
@@ -1707,6 +1707,8 @@ CONFIG_OMAP2_DSS_SLEEP_AFTER_VENC_RESET=y
 CONFIG_FB_OMAP2=y
 CONFIG_FB_OMAP2_DEBUG_SUPPORT=y
 CONFIG_FB_OMAP2_NUM_FBS=2
+# CONFIG_FB_OMAP2_VSYNC_SEND_UEVENTS is not set
+CONFIG_FB_OMAP2_VSYNC_SYSFS=y
 
 #
 # OMAP2/3 Display Device Drivers
diff --git a/arch/arm/configs/cyanogenmod_p3113_defconfig b/arch/arm/configs/cyanogenmod_p3113_defconfig
index 91c90c89c95..2ce7db87639 100644
--- a/arch/arm/configs/cyanogenmod_p3113_defconfig
+++ b/arch/arm/configs/cyanogenmod_p3113_defconfig
@@ -1707,6 +1707,8 @@ CONFIG_OMAP2_DSS_SLEEP_AFTER_VENC_RESET=y
 CONFIG_FB_OMAP2=y
 CONFIG_FB_OMAP2_DEBUG_SUPPORT=y
 CONFIG_FB_OMAP2_NUM_FBS=2
+# CONFIG_FB_OMAP2_VSYNC_SEND_UEVENTS is not set
+CONFIG_FB_OMAP2_VSYNC_SYSFS=y
 
 #
 # OMAP2/3 Display Device Drivers
diff --git a/arch/arm/configs/cyanogenmod_p5100_defconfig b/arch/arm/configs/cyanogenmod_p5100_defconfig
index dfb62c0f7c1..5feb2217d6d 100644
--- a/arch/arm/configs/cyanogenmod_p5100_defconfig
+++ b/arch/arm/configs/cyanogenmod_p5100_defconfig
@@ -1710,6 +1710,8 @@ CONFIG_OMAP_HDMI_AUDIO_CH_EVENT=y
 CONFIG_FB_OMAP2=y
 CONFIG_FB_OMAP2_DEBUG_SUPPORT=y
 CONFIG_FB_OMAP2_NUM_FBS=2
+# CONFIG_FB_OMAP2_VSYNC_SEND_UEVENTS is not set
+CONFIG_FB_OMAP2_VSYNC_SYSFS=y
 
 #
 # OMAP2/3 Display Device Drivers
diff --git a/arch/arm/configs/cyanogenmod_p5110_defconfig b/arch/arm/configs/cyanogenmod_p5110_defconfig
index dfb62c0f7c1..5feb2217d6d 100644
--- a/arch/arm/configs/cyanogenmod_p5110_defconfig
+++ b/arch/arm/configs/cyanogenmod_p5110_defconfig
@@ -1710,6 +1710,8 @@ CONFIG_OMAP_HDMI_AUDIO_CH_EVENT=y
 CONFIG_FB_OMAP2=y
 CONFIG_FB_OMAP2_DEBUG_SUPPORT=y
 CONFIG_FB_OMAP2_NUM_FBS=2
+# CONFIG_FB_OMAP2_VSYNC_SEND_UEVENTS is not set
+CONFIG_FB_OMAP2_VSYNC_SYSFS=y
 
 #
 # OMAP2/3 Display Device Drivers
diff --git a/arch/arm/configs/cyanogenmod_p5113_defconfig b/arch/arm/configs/cyanogenmod_p5113_defconfig
index dfb62c0f7c1..5feb2217d6d 100644
--- a/arch/arm/configs/cyanogenmod_p5113_defconfig
+++ b/arch/arm/configs/cyanogenmod_p5113_defconfig
@@ -1710,6 +1710,8 @@ CONFIG_OMAP_HDMI_AUDIO_CH_EVENT=y
 CONFIG_FB_OMAP2=y
 CONFIG_FB_OMAP2_DEBUG_SUPPORT=y
 CONFIG_FB_OMAP2_NUM_FBS=2
+# CONFIG_FB_OMAP2_VSYNC_SEND_UEVENTS is not set
+CONFIG_FB_OMAP2_VSYNC_SYSFS=y
 
 #
 # OMAP2/3 Display Device Drivers
diff --git a/drivers/video/omap2/omapfb/Kconfig b/drivers/video/omap2/omapfb/Kconfig
index d15486e1cba..369e85fd046 100644
--- a/drivers/video/omap2/omapfb/Kconfig
+++ b/drivers/video/omap2/omapfb/Kconfig
@@ -27,3 +27,17 @@ config FB_OMAP2_NUM_FBS
 	help
 	  Select the number of framebuffers created. OMAP2/3 has 3 overlays
 	  so normally this would be 3.
+
+config FB_OMAP2_VSYNC_SEND_UEVENTS
+    bool "OMAPFB vsync uevents"
+    default y
+	depends on FB_OMAP2
+	help
+	  Pass vsync via uevent to userspace.
+
+config FB_OMAP2_VSYNC_SYSFS
+    bool "OMAPFB vsync sysfs"
+    default n
+	depends on FB_OMAP2
+	help
+	  Pass vsync via sysfs to userspace.
diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index 3562773b3a0..befd6c2a375 100644
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -2291,10 +2291,23 @@ static int omapfb_init_display(struct omapfb2_device *fbdev,
 	return 0;
 }
 
+#ifdef CONFIG_FB_OMAP2_VSYNC_SYSFS
+static ssize_t omapfb_vsync_time(struct device *dev,
+                struct device_attribute *attr, char *buf)
+{
+	struct omapfb2_device *fbdev = dev_get_drvdata(dev);
+
+	return snprintf(buf, PAGE_SIZE, "%llu", ktime_to_ns(fbdev->vsync_timestamp));
+}
+static DEVICE_ATTR(vsync_time, S_IRUGO, omapfb_vsync_time, NULL);
+#endif
+
 static void omapfb_send_vsync_work(struct work_struct *work)
 {
 	struct omapfb2_device *fbdev =
 		container_of(work, typeof(*fbdev), vsync_work);
+
+#ifdef CONFIG_FB_OMAP2_VSYNC_SEND_UEVENTS
 	char buf[64];
 	char *envp[2];
 
@@ -2303,6 +2316,11 @@ static void omapfb_send_vsync_work(struct work_struct *work)
 	envp[0] = buf;
 	envp[1] = NULL;
 	kobject_uevent_env(&fbdev->dev->kobj, KOBJ_CHANGE, envp);
+#endif
+
+#ifdef CONFIG_FB_OMAP2_VSYNC_SYSFS
+	sysfs_notify(&fbdev->dev->kobj, NULL, "vsync_time");
+#endif
 }
 static void omapfb_vsync_isr(void *data, u32 mask)
 {
@@ -2442,6 +2460,14 @@ static int omapfb_probe(struct platform_device *pdev)
 		goto cleanup;
 	}
 
+#ifdef CONFIG_FB_OMAP2_VSYNC_SYSFS
+	r = device_create_file(fbdev->dev, &dev_attr_vsync_time);
+	if (r) {
+		dev_err(fbdev->dev, "failed to add sysfs entries\n");
+		goto cleanup;
+	}
+#endif
+
 	INIT_WORK(&fbdev->vsync_work, omapfb_send_vsync_work);
 	return 0;