[Intel-gfx] [PATCH v2 32/33] drm/vc4: vec: Add support for more analog TV standards

[Noralf Trønnes]

Den 22.09.2022 16.25, skrev Maxime Ripard:
> From: Mateusz Kwiatkowski <kfyatek+publicgit at gmail.com>
> 
> Add support for the following composite output modes (all of them are
> somewhat more obscure than the previously defined ones):
> 
> - NTSC_443 - NTSC-style signal with the chroma subcarrier shifted to
>   4.43361875 MHz (the PAL subcarrier frequency). Never used for
>   broadcasting, but sometimes used as a hack to play NTSC content in PAL
>   regions (e.g. on VCRs).
> - PAL_N - PAL with alternative chroma subcarrier frequency,
>   3.58205625 MHz. Used as a broadcast standard in Argentina, Paraguay
>   and Uruguay to fit 576i50 with colour in 6 MHz channel raster.
> - PAL60 - 480i60 signal with PAL-style color at normal European PAL
>   frequency. Another non-standard, non-broadcast mode, used in similar
>   contexts as NTSC_443. Some displays support one but not the other.
> - SECAM - French frequency-modulated analog color standard; also have
>   been broadcast in Eastern Europe and various parts of Africa and Asia.
>   Uses the same 576i50 timings as PAL.
> 
> Also added some comments explaining color subcarrier frequency
> registers.
> 
> Signed-off-by: Mateusz Kwiatkowski <kfyatek+publicgit at gmail.com>
> Signed-off-by: Maxime Ripard <maxime at cerno.tech>
> 

Acked-by: Noralf Trønnes <noralf at tronnes.org>