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[media] v4l2-dv-timings: add interlace support in detect cvt/gtf 

Extend detect_cvt/gtf API to indicate the format type (interlaced
or progressive). In case of interlaced, the vertical front and back
porch and vsync values for both (odd,even) fields are considered to
derive image height. Populated vsync, vertical front, back porch
values in bt timing structure for even and odd fields and updated
the flags appropriately.

Also modified the functions calling the detect_cvt/gtf(). As of now
these functions are calling detect_cvt/gtf() with interlaced flag
set to false.

Cc: Martin Bugge <marbugge@cisco.com>
Cc: Mats Randgaard <matrandg@cisco.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Prashant Laddha <prladdha@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Prashant Laddha 2015-05-22 02:27:34 -03:00 committed by Mauro Carvalho Chehab
parent 8cf6874e84
commit 061ddda681
5 changed files with 58 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/media/i2c/adv7604.c
View File

@ -1331,12 +1331,12 @@ static int stdi2dv_timings(struct v4l2_subdev *sd,
if (v4l2_detect_cvt(stdi->lcf + 1, hfreq, stdi->lcvs,
(stdi->hs_pol == '+' ? V4L2_DV_HSYNC_POS_POL : 0) |
(stdi->vs_pol == '+' ? V4L2_DV_VSYNC_POS_POL : 0),
timings))
false, timings))
return 0;
if (v4l2_detect_gtf(stdi->lcf + 1, hfreq, stdi->lcvs,
(stdi->hs_pol == '+' ? V4L2_DV_HSYNC_POS_POL : 0) |
(stdi->vs_pol == '+' ? V4L2_DV_VSYNC_POS_POL : 0),
state->aspect_ratio, timings))
false, state->aspect_ratio, timings))
return 0;
v4l2_dbg(2, debug, sd,

4
drivers/media/i2c/adv7842.c
View File

@ -1445,12 +1445,12 @@ static int stdi2dv_timings(struct v4l2_subdev *sd,
if (v4l2_detect_cvt(stdi->lcf + 1, hfreq, stdi->lcvs,
(stdi->hs_pol == '+' ? V4L2_DV_HSYNC_POS_POL : 0) |
(stdi->vs_pol == '+' ? V4L2_DV_VSYNC_POS_POL : 0),
timings))
false, timings))
return 0;
if (v4l2_detect_gtf(stdi->lcf + 1, hfreq, stdi->lcvs,
(stdi->hs_pol == '+' ? V4L2_DV_HSYNC_POS_POL : 0) |
(stdi->vs_pol == '+' ? V4L2_DV_VSYNC_POS_POL : 0),
state->aspect_ratio, timings))
false, state->aspect_ratio, timings))
return 0;
v4l2_dbg(2, debug, sd,

5
drivers/media/platform/vivid/vivid-vid-cap.c
View File

@ -1628,7 +1628,7 @@ static bool valid_cvt_gtf_timings(struct v4l2_dv_timings *timings)
if (bt->standards == 0 || (bt->standards & V4L2_DV_BT_STD_CVT)) {
if (v4l2_detect_cvt(total_v_lines, h_freq, bt->vsync,
bt->polarities, timings))
bt->polarities, false, timings))
return true;
}
@ -1639,7 +1639,8 @@ static bool valid_cvt_gtf_timings(struct v4l2_dv_timings *timings)
&aspect_ratio.numerator,
&aspect_ratio.denominator);
if (v4l2_detect_gtf(total_v_lines, h_freq, bt->vsync,
bt->polarities, aspect_ratio, timings))
bt->polarities, false,
aspect_ratio, timings))
return true;
}
return false;

53
drivers/media/v4l2-core/v4l2-dv-timings.c
View File

@ -346,6 +346,7 @@ EXPORT_SYMBOL_GPL(v4l2_print_dv_timings);
* @vsync - the height of the vertical sync in lines.
* @polarities - the horizontal and vertical polarities (same as struct
* v4l2_bt_timings polarities).
* @interlaced - if this flag is true, it indicates interlaced format
* @fmt - the resulting timings.
*
* This function will attempt to detect if the given values correspond to a
@ -357,7 +358,7 @@ EXPORT_SYMBOL_GPL(v4l2_print_dv_timings);
* detection function.
*/
bool v4l2_detect_cvt(unsigned frame_height, unsigned hfreq, unsigned vsync,
u32 polarities, struct v4l2_dv_timings *fmt)
u32 polarities, bool interlaced, struct v4l2_dv_timings *fmt)
{
int v_fp, v_bp, h_fp, h_bp, hsync;
int frame_width, image_height, image_width;
@ -392,7 +393,11 @@ bool v4l2_detect_cvt(unsigned frame_height, unsigned hfreq, unsigned vsync,
if (v_bp < CVT_MIN_V_BPORCH)
v_bp = CVT_MIN_V_BPORCH;
}
image_height = (frame_height - v_fp - vsync - v_bp + 1) & ~0x1;
if (interlaced)
image_height = (frame_height - 2 * v_fp - 2 * vsync - 2 * v_bp) & ~0x1;
else
image_height = (frame_height - v_fp - vsync - v_bp + 1) & ~0x1;
if (image_height < 0)
return false;
@ -465,11 +470,27 @@ bool v4l2_detect_cvt(unsigned frame_height, unsigned hfreq, unsigned vsync,
fmt->bt.hsync = hsync;
fmt->bt.vsync = vsync;
fmt->bt.hbackporch = frame_width - image_width - h_fp - hsync;
fmt->bt.vbackporch = frame_height - image_height - v_fp - vsync;
if (!interlaced) {
fmt->bt.vbackporch = frame_height - image_height - v_fp - vsync;
fmt->bt.interlaced = V4L2_DV_PROGRESSIVE;
} else {
fmt->bt.vbackporch = (frame_height - image_height - 2 * v_fp -
2 * vsync) / 2;
fmt->bt.il_vbackporch = frame_height - image_height - 2 * v_fp -
2 * vsync - fmt->bt.vbackporch;
fmt->bt.il_vfrontporch = v_fp;
fmt->bt.il_vsync = vsync;
fmt->bt.flags |= V4L2_DV_FL_HALF_LINE;
fmt->bt.interlaced = V4L2_DV_INTERLACED;
}
fmt->bt.pixelclock = pix_clk;
fmt->bt.standards = V4L2_DV_BT_STD_CVT;
if (reduced_blanking)
fmt->bt.flags |= V4L2_DV_FL_REDUCED_BLANKING;
return true;
}
EXPORT_SYMBOL_GPL(v4l2_detect_cvt);
@ -508,6 +529,7 @@ EXPORT_SYMBOL_GPL(v4l2_detect_cvt);
* @vsync - the height of the vertical sync in lines.
* @polarities - the horizontal and vertical polarities (same as struct
* v4l2_bt_timings polarities).
* @interlaced - if this flag is true, it indicates interlaced format
* @aspect - preferred aspect ratio. GTF has no method of determining the
* aspect ratio in order to derive the image width from the
* image height, so it has to be passed explicitly. Usually
@ -523,6 +545,7 @@ bool v4l2_detect_gtf(unsigned frame_height,
unsigned hfreq,
unsigned vsync,
u32 polarities,
bool interlaced,
struct v4l2_fract aspect,
struct v4l2_dv_timings *fmt)
{
@ -547,9 +570,11 @@ bool v4l2_detect_gtf(unsigned frame_height,
/* Vertical */
v_fp = GTF_V_FP;
v_bp = (GTF_MIN_VSYNC_BP * hfreq + 500000) / 1000000 - vsync;
image_height = (frame_height - v_fp - vsync - v_bp + 1) & ~0x1;
if (interlaced)
image_height = (frame_height - 2 * v_fp - 2 * vsync - 2 * v_bp) & ~0x1;
else
image_height = (frame_height - v_fp - vsync - v_bp + 1) & ~0x1;
if (image_height < 0)
return false;
@ -603,11 +628,27 @@ bool v4l2_detect_gtf(unsigned frame_height,
fmt->bt.hsync = hsync;
fmt->bt.vsync = vsync;
fmt->bt.hbackporch = frame_width - image_width - h_fp - hsync;
fmt->bt.vbackporch = frame_height - image_height - v_fp - vsync;
if (!interlaced) {
fmt->bt.vbackporch = frame_height - image_height - v_fp - vsync;
fmt->bt.interlaced = V4L2_DV_PROGRESSIVE;
} else {
fmt->bt.vbackporch = (frame_height - image_height - 2 * v_fp -
2 * vsync) / 2;
fmt->bt.il_vbackporch = frame_height - image_height - 2 * v_fp -
2 * vsync - fmt->bt.vbackporch;
fmt->bt.il_vfrontporch = v_fp;
fmt->bt.il_vsync = vsync;
fmt->bt.flags |= V4L2_DV_FL_HALF_LINE;
fmt->bt.interlaced = V4L2_DV_INTERLACED;
}
fmt->bt.pixelclock = pix_clk;
fmt->bt.standards = V4L2_DV_BT_STD_GTF;
if (!default_gtf)
fmt->bt.flags |= V4L2_DV_FL_REDUCED_BLANKING;
return true;
}
EXPORT_SYMBOL_GPL(v4l2_detect_gtf);

6
include/media/v4l2-dv-timings.h
View File

@ -117,6 +117,7 @@ void v4l2_print_dv_timings(const char *dev_prefix, const char *prefix,
* @vsync - the height of the vertical sync in lines.
* @polarities - the horizontal and vertical polarities (same as struct
* v4l2_bt_timings polarities).
* @interlaced - if this flag is true, it indicates interlaced format
* @fmt - the resulting timings.
*
* This function will attempt to detect if the given values correspond to a
@ -124,7 +125,7 @@ void v4l2_print_dv_timings(const char *dev_prefix, const char *prefix,
* in with the found CVT timings.
*/
bool v4l2_detect_cvt(unsigned frame_height, unsigned hfreq, unsigned vsync,
u32 polarities, struct v4l2_dv_timings *fmt);
u32 polarities, bool interlaced, struct v4l2_dv_timings *fmt);
/** v4l2_detect_gtf - detect if the given timings follow the GTF standard
* @frame_height - the total height of the frame (including blanking) in lines.
@ -132,6 +133,7 @@ bool v4l2_detect_cvt(unsigned frame_height, unsigned hfreq, unsigned vsync,
* @vsync - the height of the vertical sync in lines.
* @polarities - the horizontal and vertical polarities (same as struct
* v4l2_bt_timings polarities).
* @interlaced - if this flag is true, it indicates interlaced format
* @aspect - preferred aspect ratio. GTF has no method of determining the
* aspect ratio in order to derive the image width from the
* image height, so it has to be passed explicitly. Usually
@ -144,7 +146,7 @@ bool v4l2_detect_cvt(unsigned frame_height, unsigned hfreq, unsigned vsync,
* in with the found GTF timings.
*/
bool v4l2_detect_gtf(unsigned frame_height, unsigned hfreq, unsigned vsync,
u32 polarities, struct v4l2_fract aspect,
u32 polarities, bool interlaced, struct v4l2_fract aspect,
struct v4l2_dv_timings *fmt);
/** v4l2_calc_aspect_ratio - calculate the aspect ratio based on bytes