From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Drivers often have to log the contents of a dv_timings struct. Adding
this helper will make it easier for drivers to do so.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-dv-timings.c | 49 +++++++++++++++++++++++++++++++
include/media/v4l2-dv-timings.h | 9 ++++++
2 files changed, 58 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-dv-timings.c b/drivers/media/v4l2-core/v4l2-dv-timings.c
index 72cf224..917e58c 100644
--- a/drivers/media/v4l2-core/v4l2-dv-timings.c
+++ b/drivers/media/v4l2-core/v4l2-dv-timings.c
@@ -223,6 +223,55 @@ bool v4l_match_dv_timings(const struct v4l2_dv_timings *t1,
}
EXPORT_SYMBOL_GPL(v4l_match_dv_timings);
+void v4l2_print_dv_timings(const char *dev_prefix, const char *prefix,
+ const struct v4l2_dv_timings *t, bool detailed)
+{
+ const struct v4l2_bt_timings *bt = &t->bt;
+ u32 htot, vtot;
+
+ if (t->type != V4L2_DV_BT_656_1120)
+ return;
+
+ htot = V4L2_DV_BT_FRAME_WIDTH(bt);
+ vtot = V4L2_DV_BT_FRAME_HEIGHT(bt);
+
+ if (prefix == NULL)
+ prefix = "";
+
+ pr_info("%s: %s%ux%u%s%u (%ux%u)\n", dev_prefix, prefix,
+ bt->width, bt->height, bt->interlaced ? "i" : "p",
+ (htot * vtot) > 0 ? ((u32)bt->pixelclock / (htot * vtot)) : 0,
+ htot, vtot);
+
+ if (!detailed)
+ return;
+
+ pr_info("%s: horizontal: fp = %u, %ssync = %u, bp = %u\n",
+ dev_prefix, bt->hfrontporch,
+ (bt->polarities & V4L2_DV_HSYNC_POS_POL) ? "+" : "-",
+ bt->hsync, bt->hbackporch);
+ pr_info("%s: vertical: fp = %u, %ssync = %u, bp = %u\n",
+ dev_prefix, bt->vfrontporch,
+ (bt->polarities & V4L2_DV_VSYNC_POS_POL) ? "+" : "-",
+ bt->vsync, bt->vbackporch);
+ pr_info("%s: pixelclock: %llu\n", dev_prefix, bt->pixelclock);
+ pr_info("%s: flags (0x%x):%s%s%s%s\n", dev_prefix, bt->flags,
+ (bt->flags & V4L2_DV_FL_REDUCED_BLANKING) ?
+ " REDUCED_BLANKING" : "",
+ (bt->flags & V4L2_DV_FL_CAN_REDUCE_FPS) ?
+ " CAN_REDUCE_FPS" : "",
+ (bt->flags & V4L2_DV_FL_REDUCED_FPS) ?
+ " REDUCED_FPS" : "",
+ (bt->flags & V4L2_DV_FL_HALF_LINE) ?
+ " HALF_LINE" : "");
+ pr_info("%s: standards (0x%x):%s%s%s%s\n", dev_prefix, bt->standards,
+ (bt->standards & V4L2_DV_BT_STD_CEA861) ? " CEA" : "",
+ (bt->standards & V4L2_DV_BT_STD_DMT) ? " DMT" : "",
+ (bt->standards & V4L2_DV_BT_STD_CVT) ? " CVT" : "",
+ (bt->standards & V4L2_DV_BT_STD_GTF) ? " GTF" : "");
+}
+EXPORT_SYMBOL_GPL(v4l2_print_dv_timings);
+
/*
* CVT defines
* Based on Coordinated Video Timings Standard
diff --git a/include/media/v4l2-dv-timings.h b/include/media/v4l2-dv-timings.h
index 4c7bb54..696e5c2 100644
--- a/include/media/v4l2-dv-timings.h
+++ b/include/media/v4l2-dv-timings.h
@@ -76,6 +76,15 @@ bool v4l_match_dv_timings(const struct v4l2_dv_timings *measured,
const struct v4l2_dv_timings *standard,
unsigned pclock_delta);
+/** v4l2_print_dv_timings() - log the contents of a dv_timings struct
+ * @dev_prefix:device prefix for each log line.
+ * @prefix: additional prefix for each log line, may be NULL.
+ * @t: the timings data.
+ * @detailed: if true, give a detailed log.
+ */
+void v4l2_print_dv_timings(const char *dev_prefix, const char *prefix,
+ const struct v4l2_dv_timings *t, bool detailed);
+
/** v4l2_detect_cvt - detect if the given timings follow the CVT standard
* @frame_height - the total height of the frame (including blanking) in lines.
* @hfreq - the horizontal frequency in Hz.
--
1.8.3.2
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