[Android Q&A, Help & Troubleshooting] hackwerk:
DATA

I just now understand what DATA stands for and what happens in the 4 tpd lines.

DATA (high) divides my visible screen in 5 vertical parts (4 is top 5th part, 3 is the next, then 2, 1 and 0 is the bottom fifth part).

All 5 parts are (should be, see BUT) 256 pixels high (DATA low, 255 to 0)(5 * 256 = 1280).

Swiping downwards, the DATA high goes from 4 to 3 to 2 to 1 to 0. In every part BUT the bottom and top parts, the DATA low starts at 255 and also counts down to 0.

BUT: As previously mentioned DATA starts at the top with 4, 235 (instead of 4, 255?!) and ends at the bottom with 0, 107 (instead of 0, 0?!)! The gap in the middle is (obviously) in the middle section called DATA high 2 (low sometimes jumps from about 186 to 127 etc.)

Logs of the swipes:

Copy/paste top edge (visible Y is 0) to be complete:

<4>[ 5536.130348] (0)[77:mtk-tpd] DATA high 4, low 235

<4>[ 5536.130388] (0)[77:mtk-tpd] RAW cinfo->x[0] = 366, cinfo->y[0] = 1259, cinfo->p[0] = 2, point_num=1

<4>[ 5536.130421] (0)[77:mtk-tpd] CAL cinfo->x[0] = 366, cinfo->y[0] = 1399, cinfo->p[0] = 2, point_num=1

<4>[ 5536.130453] (0)[77:mtk-tpd] cinfo->x[0] = 366, cinfo->y[0] = 1399, cinfo->p[0] = 2, point_num=1

1/5 to 2/5 of the visible screen (scrolling downwards)(at line 1/5 of the screen / 255 pixels from the top):

<4>[57017.583442] (1)[77:mtk-tpd] DATA high 4, low 0

<4>[57017.583460] (1)[77:mtk-tpd] RAW cinfo->x[0] = 517, cinfo->y[0] = 1024, cinfo->p[0] = 2, point_num=1

<4>[57017.583474] (1)[77:mtk-tpd] CAL cinfo->x[0] = 517, cinfo->y[0] = 1139, cinfo->p[0] = 2, point_num=1

<4>[57017.583488] (1)[77:mtk-tpd] cinfo->x[0] = 517, cinfo->y[0] = 1139, cinfo->p[0] = 2, point_num=1

<4>[57017.598913] (1)[77:mtk-tpd] DATA high 3, low 255

<4>[57017.598934] (1)[77:mtk-tpd] RAW cinfo->x[0] = 517, cinfo->y[0] = 1023, cinfo->p[0] = 2, point_num=1

<4>[57017.598951] (1)[77:mtk-tpd] CAL cinfo->x[0] = 517, cinfo->y[0] = 1136, cinfo->p[0] = 2, point_num=1

<4>[57017.598967] (1)[77:mtk-tpd] cinfo->x[0] = 517, cinfo->y[0] = 1136, cinfo->p[0] = 2, point_num=1

2/5 to 3/5 of the visible screen (swiping downwards):

<4>[57543.319114] (1)[77:mtk-tpd] DATA high 3, low 0

<4>[57543.319137] (1)[77:mtk-tpd] RAW cinfo->x[0] = 556, cinfo->y[0] = 768, cinfo->p[0] = 2, point_num=1

<4>[57543.319151] (1)[77:mtk-tpd] CAL cinfo->x[0] = 556, cinfo->y[0] = 853, cinfo->p[0] = 2, point_num=1

<4>[57543.319165] (1)[77:mtk-tpd] cinfo->x[0] = 556, cinfo->y[0] = 853, cinfo->p[0] = 2, point_num=1

<4>[57543.334048] (1)[77:mtk-tpd] DATA high 2, low 255

<4>[57543.334071] (1)[77:mtk-tpd] RAW cinfo->x[0] = 556, cinfo->y[0] = 767, cinfo->p[0] = 2, point_num=1

<4>[57543.334085] (1)[77:mtk-tpd] CAL cinfo->x[0] = 556, cinfo->y[0] = 852, cinfo->p[0] = 2, point_num=1

<4>[57543.334099] (1)[77:mtk-tpd] cinfo->x[0] = 556, cinfo->y[0] = 852, cinfo->p[0] = 2, point_num=1

3/5 to 4/5 of the visible screen (swiping downwards):

<4>[57771.665977] (0)[77:mtk-tpd] DATA high 2, low 0

<4>[57771.665998] (0)[77:mtk-tpd] RAW cinfo->x[0] = 272, cinfo->y[0] = 512, cinfo->p[0] = 2, point_num=1

<4>[57771.666012] (0)[77:mtk-tpd] CAL cinfo->x[0] = 272, cinfo->y[0] = 569, cinfo->p[0] = 2, point_num=1

<4>[57771.666026] (0)[77:mtk-tpd] cinfo->x[0] = 272, cinfo->y[0] = 569, cinfo->p[0] = 2, point_num=1

<4>[57771.681414] (0)[77:mtk-tpd] DATA high 1, low 255

<4>[57771.681439] (0)[77:mtk-tpd] RAW cinfo->x[0] = 273, cinfo->y[0] = 511, cinfo->p[0] = 2, point_num=1

<4>[57771.681456] (0)[77:mtk-tpd] CAL cinfo->x[0] = 273, cinfo->y[0] = 567, cinfo->p[0] = 2, point_num=1

<4>[57771.681473] (0)[77:mtk-tpd] cinfo->x[0] = 273, cinfo->y[0] = 567, cinfo->p[0] = 2, point_num=1

4/5 to 5/5 the visible screen (swiping downwards):

<4>[57951.070466] (3)[77:mtk-tpd] DATA high 1, low 0

<4>[57951.070491] (3)[77:mtk-tpd] RAW cinfo->x[0] = 620, cinfo->y[0] = 256, cinfo->p[0] = 2, point_num=1

<4>[57951.070505] (3)[77:mtk-tpd] CAL cinfo->x[0] = 620, cinfo->y[0] = 284, cinfo->p[0] = 2, point_num=1

<4>[57951.070519] (3)[77:mtk-tpd] cinfo->x[0] = 620, cinfo->y[0] = 284, cinfo->p[0] = 2, point_num=1

<4>[57951.085304] (3)[77:mtk-tpd] DATA high 0, low 255

<4>[57951.085327] (3)[77:mtk-tpd] RAW cinfo->x[0] = 620, cinfo->y[0] = 255, cinfo->p[0] = 2, point_num=1

<4>[57951.085341] (3)[77:mtk-tpd] CAL cinfo->x[0] = 620, cinfo->y[0] = 283, cinfo->p[0] = 2, point_num=1

<4>[57951.085357] (3)[77:mtk-tpd] cinfo->x[0] = 620, cinfo->y[0] = 283, cinfo->p[0] = 2, point_num=1

Copy/paste bottom edge (visible Y is 1280) to be complete:

<4>[ 5559.338735] (0)[77:mtk-tpd] DATA high 0, low 107

<4>[ 5559.338771] (0)[77:mtk-tpd] RAW cinfo->x[0] = 559, cinfo->y[0] = 107, cinfo->p[0] = 2, point_num=1

<4>[ 5559.338803] (0)[77:mtk-tpd] CAL cinfo->x[0] = 559, cinfo->y[0] = 118, cinfo->p[0] = 2, point_num=1

<4>[ 5559.338836] (0)[77:mtk-tpd] cinfo->x[0] = 559, cinfo->y[0] = 118, cinfo->p[0] = 2, point_num=1