[media] v4l2-dv-timings: add v4l2_print_dv_timings helper
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@cisco.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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@ -223,6 +223,55 @@ bool v4l_match_dv_timings(const struct v4l2_dv_timings *t1,
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}
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}
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EXPORT_SYMBOL_GPL(v4l_match_dv_timings);
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EXPORT_SYMBOL_GPL(v4l_match_dv_timings);
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void v4l2_print_dv_timings(const char *dev_prefix, const char *prefix,
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const struct v4l2_dv_timings *t, bool detailed)
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{
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const struct v4l2_bt_timings *bt = &t->bt;
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u32 htot, vtot;
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if (t->type != V4L2_DV_BT_656_1120)
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return;
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htot = V4L2_DV_BT_FRAME_WIDTH(bt);
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vtot = V4L2_DV_BT_FRAME_HEIGHT(bt);
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if (prefix == NULL)
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prefix = "";
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pr_info("%s: %s%ux%u%s%u (%ux%u)\n", dev_prefix, prefix,
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bt->width, bt->height, bt->interlaced ? "i" : "p",
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(htot * vtot) > 0 ? ((u32)bt->pixelclock / (htot * vtot)) : 0,
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htot, vtot);
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if (!detailed)
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return;
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pr_info("%s: horizontal: fp = %u, %ssync = %u, bp = %u\n",
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dev_prefix, bt->hfrontporch,
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(bt->polarities & V4L2_DV_HSYNC_POS_POL) ? "+" : "-",
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bt->hsync, bt->hbackporch);
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pr_info("%s: vertical: fp = %u, %ssync = %u, bp = %u\n",
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dev_prefix, bt->vfrontporch,
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(bt->polarities & V4L2_DV_VSYNC_POS_POL) ? "+" : "-",
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bt->vsync, bt->vbackporch);
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pr_info("%s: pixelclock: %llu\n", dev_prefix, bt->pixelclock);
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pr_info("%s: flags (0x%x):%s%s%s%s\n", dev_prefix, bt->flags,
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(bt->flags & V4L2_DV_FL_REDUCED_BLANKING) ?
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" REDUCED_BLANKING" : "",
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(bt->flags & V4L2_DV_FL_CAN_REDUCE_FPS) ?
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" CAN_REDUCE_FPS" : "",
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(bt->flags & V4L2_DV_FL_REDUCED_FPS) ?
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" REDUCED_FPS" : "",
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(bt->flags & V4L2_DV_FL_HALF_LINE) ?
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" HALF_LINE" : "");
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pr_info("%s: standards (0x%x):%s%s%s%s\n", dev_prefix, bt->standards,
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(bt->standards & V4L2_DV_BT_STD_CEA861) ? " CEA" : "",
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(bt->standards & V4L2_DV_BT_STD_DMT) ? " DMT" : "",
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(bt->standards & V4L2_DV_BT_STD_CVT) ? " CVT" : "",
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(bt->standards & V4L2_DV_BT_STD_GTF) ? " GTF" : "");
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}
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EXPORT_SYMBOL_GPL(v4l2_print_dv_timings);
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/*
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/*
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* CVT defines
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* CVT defines
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* Based on Coordinated Video Timings Standard
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* Based on Coordinated Video Timings Standard
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@ -76,6 +76,15 @@ bool v4l_match_dv_timings(const struct v4l2_dv_timings *measured,
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const struct v4l2_dv_timings *standard,
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const struct v4l2_dv_timings *standard,
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unsigned pclock_delta);
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unsigned pclock_delta);
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/** v4l2_print_dv_timings() - log the contents of a dv_timings struct
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* @dev_prefix:device prefix for each log line.
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* @prefix: additional prefix for each log line, may be NULL.
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* @t: the timings data.
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* @detailed: if true, give a detailed log.
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*/
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void v4l2_print_dv_timings(const char *dev_prefix, const char *prefix,
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const struct v4l2_dv_timings *t, bool detailed);
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/** v4l2_detect_cvt - detect if the given timings follow the CVT standard
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/** v4l2_detect_cvt - detect if the given timings follow the CVT standard
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* @frame_height - the total height of the frame (including blanking) in lines.
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* @frame_height - the total height of the frame (including blanking) in lines.
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* @hfreq - the horizontal frequency in Hz.
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* @hfreq - the horizontal frequency in Hz.
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