Vladimir Barinov wrote:
Hi Hans,
Hans Verkuil wrote:
+ */
+ val = i2c_smbus_read_byte_data(client, STATUS_REG);
+ if (val < 0)
+ return val;
+
+ priv->std = val & STATUS_NTSCPAL ? V4L2_STD_PAL : V4L2_STD_NTSC;
Shouldn't this be 50 Hz vs 60 Hz formats? There are 60 Hz PAL
standards
and usually these devices detect 50 Hz vs 60 Hz, not NTSC vs PAL.
In the reference manual it is not mentioned about 50/60Hz input
format selection/detection but it mentioned just PAL/NTSC.
The 50hz formats can be ether PAL and NTSC formats variants. The
same is applied to 60Hz.
In the ML86V7667 datasheet the description for STATUS register
detection bit is just PAL/NTSC:
" $2C/STATUS [2] NTSC/PAL identification 0: NTSC /1: PAL "
If you assure me that I must judge their description as 50 vs 60Hz
formats and not PAL/NTSC then I will make the change.
I can't judge that. Are there no status bits anywhere that tell you
something
about the number of lines per frame or the framerate?
You are right. I've found a relationship table with description of
number of total H/V pixels vs Video Modes mentioned in datasheet.
It's "NTSC" has Odd/263 and Even/262 vertical lines. The "PAL" has
Odd/312 and Even/313.
A little clarification: it's "NTSC" relates to 485 active lines (after
rejection of blank lines) and "PAL" relates to 578 active lines.
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