From: Cho KyongHo <pullip.cho@samsung.com>
Date: Tue, 2 Jun 2015 07:27:54 +0000 (+0900)
Subject: [COMMON] media: smfc: measure H/W delay
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0b03ae6650611118472bc30fd76c404a1025127d;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[COMMON] media: smfc: measure H/W delay

The delay in usec. is stored to reserved2 field of v4l2_buffer of
capture queue.

Change-Id: I91165095d69003d67c48a36a147d03a386d9ed89
Signed-off-by: Cho KyongHo <pullip.cho@samsung.com>
---

diff --git a/drivers/media/platform/exynos/smfc/smfc.c b/drivers/media/platform/exynos/smfc/smfc.c
index c9fe83960601..9e3bebbc5931 100644
--- a/drivers/media/platform/exynos/smfc/smfc.c
+++ b/drivers/media/platform/exynos/smfc/smfc.c
@@ -292,11 +292,14 @@ static irqreturn_t exynos_smfc_irq_handler(int irq, void *priv)
 {
 	struct smfc_dev *smfc = priv;
 	struct smfc_ctx *ctx = v4l2_m2m_get_curr_priv(smfc->m2mdev);
+	ktime_t ktime;
 	enum vb2_buffer_state state = VB2_BUF_STATE_DONE;
 	u32 streamsize = smfc_get_streamsize(smfc);
 	u32 thumb_streamsize = smfc_get_2nd_streamsize(smfc);
 	bool suspending = false;
 
+	ktime = ktime_get();
+
 	if (!(smfc->flags & SMFC_DEV_RUNNING)) {
 		smfc_dump_registers(smfc);
 		BUG();
@@ -333,6 +336,10 @@ static irqreturn_t exynos_smfc_irq_handler(int irq, void *priv)
 				vb2_set_plane_payload(&vb_capture->vb2_buf, 1,
 							thumb_streamsize);
 		}
+
+		vb_capture->vb2_buf.timestamp =
+				(__u32)ktime_us_delta(ktime, ctx->ktime_beg);
+
 		v4l2_m2m_buf_done(v4l2_m2m_src_buf_remove(ctx->m2mctx), state);
 		v4l2_m2m_buf_done(vb_capture, state);
 		if (!suspending) {
@@ -1235,6 +1242,8 @@ static void smfc_m2m_device_run(void *priv)
 	ctx->smfc->flags |= SMFC_DEV_RUNNING;
 	spin_unlock_irqrestore(&ctx->smfc->flag_lock, flags);
 
+	ctx->ktime_beg = ktime_get();
+
 	smfc_hwconfigure_start(ctx, restart_interval, !!enable_hwfc);
 
 	return;
diff --git a/drivers/media/platform/exynos/smfc/smfc.h b/drivers/media/platform/exynos/smfc/smfc.h
index a59e01b6a25c..9a758adaaa0a 100644
--- a/drivers/media/platform/exynos/smfc/smfc.h
+++ b/drivers/media/platform/exynos/smfc/smfc.h
@@ -12,6 +12,8 @@
 #ifndef _MEDIA_EXYNOS_SMFC_H_
 #define _MEDIA_EXYNOS_SMFC_H_
 
+#include <linux/ktime.h>
+
 #include <media/v4l2-ioctl.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-mem2mem.h>
@@ -68,6 +70,7 @@ struct smfc_ctx {
 	struct v4l2_ctrl_handler v4l2_ctrlhdlr;
 	struct smfc_dev *smfc;
 	struct v4l2_m2m_ctx *m2mctx;
+	ktime_t ktime_beg;
 	u32 flags;
 	/* uncomressed image description */
 	const struct smfc_image_format *img_fmt;