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media: em28xx: Add StarTech SVID2USB232

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Add support for the StarTech SVID2USB232 USB analog video grabber
(USB ID eb1a:8286). The device uses the Empia EM28281 bridge, a
member of the em2828X family with an integrated video decoder.

Reuses the EM28XX_BUILTIN decoder path introduced in commit
8e53399c63 ("media: em28xx: Add support for Empia em2828X bridge").
The standard PAL/NTSC switching and composite/S-Video input
switching in em2828X_decoder_set_std() handle this board without
board-specific code.

Inputs:
 - Composite video
 - S-Video
 - Analog stereo audio (line in)

Tested on hardware with a PAL signal on both S-Video and composite
inputs (ffplay -f v4l2 /dev/video0).

This supersedes an earlier RFC posting from before EM28XX_BUILTIN was
available, which proposed a custom EM28XX_I2C_ALGO_EM28281_INTEGRATED
TVP5150-bridge algorithm. That approach is no longer necessary now that
the em2828X bridge support landed.

Link: https://lore.kernel.org/all/20260119185921.575666-1-xeeynamo@hotmail.com/
Signed-off-by: Luciano Ciccariello <xeeynamo@hotmail.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
This commit is contained in:
Luciano Ciccariello 2026-05-20 15:20:10 +01:00 • committed by Hans Verkuil
commit bedd5ea6b7
4 changed files with 35 additions and 0 deletions
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