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Commit 0216dc2f authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

[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: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent f3b33ede

drivers/media/v4l2-core/v4l2-dv-timings.c

+49 −0
Original line number Original line Diff line number Diff line
@@ -223,6 +223,55 @@ bool v4l_match_dv_timings(const struct v4l2_dv_timings *t1, 
}

}

EXPORT_SYMBOL_GPL(v4l_match_dv_timings);

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

 * CVT defines

 * Based on Coordinated Video Timings Standard

 * Based on Coordinated Video Timings Standard

include/media/v4l2-dv-timings.h

+9 −0
Original line number Original line Diff line number Diff line
@@ -76,6 +76,15 @@ bool v4l_match_dv_timings(const struct v4l2_dv_timings *measured, 
			  const struct v4l2_dv_timings *standard,

			  const struct v4l2_dv_timings *standard,

			  unsigned pclock_delta);

			  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

/** v4l2_detect_cvt - detect if the given timings follow the CVT standard

 * @frame_height - the total height of the frame (including blanking) in lines.

 * @frame_height - the total height of the frame (including blanking) in lines.

 * @hfreq - the horizontal frequency in Hz.

 * @hfreq - the horizontal frequency in Hz.