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Groups > linux.kernel > #1646040
| From | Chen-Yu Tsai <wens@csie.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [linux-sunxi] Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC |
| Date | 2017-05-20 03:40 +0200 |
| Message-ID | <tJ1x7-2sf-1@gated-at.bofh.it> (permalink) |
| References | <tIaj7-5vV-9@gated-at.bofh.it> <tIUvE-5Pe-3@gated-at.bofh.it> <tIUvE-5Pe-11@gated-at.bofh.it> <tIUP0-5Wm-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Sat, May 20, 2017 at 2:23 AM, Jernej Škrabec <jernej.skrabec@siol.net> wrote: > Hi, > > Dne petek, 19. maj 2017 ob 20:08:18 CEST je Icenowy Zheng napisal(a): >> 于 2017年5月20日 GMT+08:00 上午2:03:30, Maxime Ripard <maxime.ripard@free- > electrons.com> 写到: >> >On Thu, May 18, 2017 at 12:43:50AM +0800, Icenowy Zheng wrote: >> >> Allwinner H3 features a TV encoder similar to the one in earlier >> > >> >SoCs, >> > >> >> but with some different points about clocks: >> >> - It has a mod clock and a bus clock. >> >> - The mod clock must be at a fixed rate to generate signal. >> > >> >Why? >> >> It's experiment result by Jernej. >> >> The clock rates in BSP kernel is also specially designed >> (PLL_DE at 432MHz) in order to be able to feed the TVE. > > My experiments and search through BSP code showed that TVE seems to have > additional fixed predivider 8. So if you want to generate 27 MHz clock, unit > has to be feed with 216 MHz. > > TVE has only one PLL source PLL_DE. And since 216 MHz is a bit low for DE2, > BSP defaults to 432 MHz for PLL_DE and use divider 2 to generate 216 MHz. This > clock is then divided by 8 internaly to get final 27 MHz. > > Please note that I don't have any hard evidence to support that, only > experimental data. However, only that explanation make sense to me. > > BTW, BSP H3/H5 TV driver supports only PAL and NTSC which both use 27 MHz base > clock. Further experiments are needed to check if there is any possibility to > have other resolutions by manipulating clocks and give other proper settings. > I plan to do that, but not in very near future. You only have composite video output, and those are the only 2 standard resolutions that make any sense. ChenYu
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[RFC PATCH 00/11] Support for H3 Composite Output support Icenowy Zheng <icenowy@aosc.io> - 2017-05-17 18:50 +0200
[RFC PATCH 11/11] [DO NOT MERGE] ARM: sun8i: h3: enable TV output on Orange Pi PC Icenowy Zheng <icenowy@aosc.io> - 2017-05-17 18:50 +0200
[RFC PATCH 01/11] dt-bindings: update the binding for Allwinner H3 TVE support Icenowy Zheng <icenowy@aosc.io> - 2017-05-17 18:50 +0200
Re: [RFC PATCH 01/11] dt-bindings: update the binding for Allwinner H3 TVE support Icenowy Zheng <icenowy@aosc.io> - 2017-05-19 20:10 +0200
Re: [linux-sunxi] Re: [RFC PATCH 01/11] dt-bindings: update the binding for Allwinner H3 TVE support Chen-Yu Tsai <wens@csie.org> - 2017-05-20 04:10 +0200
Re: [RFC PATCH 01/11] dt-bindings: update the binding for Allwinner H3 TVE support Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-05-19 20:10 +0200
[RFC PATCH 03/11] drm: sun4i: ignore swapped mixer<->tcon connection for DE2 Icenowy Zheng <icenowy@aosc.io> - 2017-05-17 18:50 +0200
Re: [RFC PATCH 03/11] drm: sun4i: ignore swapped mixer<->tcon connection for DE2 Icenowy Zheng <icenowy@aosc.io> - 2017-05-19 20:10 +0200
Re: [RFC PATCH 03/11] drm: sun4i: ignore swapped mixer<->tcon connection for DE2 Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-05-24 10:20 +0200
Re: [RFC PATCH 03/11] drm: sun4i: ignore swapped mixer<->tcon connection for DE2 Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-05-19 20:10 +0200
[RFC PATCH 05/11] drm: sun4i: add compatible for H3 display engine Icenowy Zheng <icenowy@aosc.io> - 2017-05-17 18:50 +0200
[RFC PATCH 02/11] drm: sun4i: add support for H3 mixers Icenowy Zheng <icenowy@aosc.io> - 2017-05-17 18:50 +0200
Re: [linux-sunxi] Re: [RFC PATCH 02/11] drm: sun4i: add support for H3 mixers Icenowy Zheng <icenowy@aosc.io> - 2017-05-19 20:00 +0200
Re: [linux-sunxi] Re: [RFC PATCH 02/11] drm: sun4i: add support for H3 mixers Jernej Škrabec <jernej.skrabec@siol.net> - 2017-05-19 20:20 +0200
Re: [RFC PATCH 02/11] drm: sun4i: add support for H3 mixers Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-05-19 20:00 +0200
[RFC PATCH 04/11] drm: sun4i: add support for H3's TCON0/1 Icenowy Zheng <icenowy@aosc.io> - 2017-05-17 19:00 +0200
[RFC PATCH 09/11] clk: sunxi-ng: export CLK_PLL_DE for H3 Icenowy Zheng <icenowy@aosc.io> - 2017-05-17 19:10 +0200
[RFC PATCH 10/11] ARM: sun8i: h3: add display engine pipeline for TVE Icenowy Zheng <icenowy@aosc.io> - 2017-05-17 19:10 +0200
Re: [linux-sunxi] [RFC PATCH 10/11] ARM: sun8i: h3: add display engine pipeline for TVE Jernej Škrabec <jernej.skrabec@siol.net> - 2017-05-17 22:30 +0200
Re: [RFC PATCH 10/11] ARM: sun8i: h3: add display engine pipeline for TVE Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-05-19 20:10 +0200
Re: [linux-sunxi] Re: [RFC PATCH 10/11] ARM: sun8i: h3: add display engine pipeline for TVE Icenowy Zheng <icenowy@aosc.io> - 2017-05-19 20:30 +0200
Re: [linux-sunxi] Re: [RFC PATCH 10/11] ARM: sun8i: h3: add display engine pipeline for TVE Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-05-24 10:30 +0200
Re: [linux-sunxi] [RFC PATCH 10/11] ARM: sun8i: h3: add display engine pipeline for TVE Chen-Yu Tsai <wens@csie.org> - 2017-05-24 07:30 +0200
Re: [linux-sunxi] [RFC PATCH 10/11] ARM: sun8i: h3: add display engine pipeline for TVE Icenowy Zheng <icenowy@aosc.io> - 2017-05-24 07:30 +0200
Re: [linux-sunxi] [RFC PATCH 10/11] ARM: sun8i: h3: add display engine pipeline for TVE Icenowy Zheng <icenowy@aosc.io> - 2017-05-24 07:40 +0200
Re: [linux-sunxi] [RFC PATCH 10/11] ARM: sun8i: h3: add display engine pipeline for TVE Chen-Yu Tsai <wens@csie.org> - 2017-05-24 07:40 +0200
[RFC PATCH 06/11] drm: sun4i: add color space correction support for DE2 mixer Icenowy Zheng <icenowy@aosc.io> - 2017-05-17 19:10 +0200
Re: [linux-sunxi] [RFC PATCH 06/11] drm: sun4i: add color space correction support for DE2 mixer Jernej Škrabec <jernej.skrabec@siol.net> - 2017-05-17 22:30 +0200
[RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC Icenowy Zheng <icenowy@aosc.io> - 2017-05-17 19:10 +0200
Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-05-19 20:10 +0200
Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC Icenowy Zheng <icenowy@aosc.io> - 2017-05-19 20:10 +0200
Re: [linux-sunxi] Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC Jernej Škrabec <jernej.skrabec@siol.net> - 2017-05-19 20:30 +0200
Re: [linux-sunxi] Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC Chen-Yu Tsai <wens@csie.org> - 2017-05-20 03:40 +0200
Re: [linux-sunxi] Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC Jernej Škrabec <jernej.skrabec@siol.net> - 2017-05-22 20:00 +0200
Re: [linux-sunxi] Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC Icenowy Zheng <icenowy@aosc.io> - 2017-05-23 15:00 +0200
Re: [linux-sunxi] Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-05-23 15:00 +0200
Re: [linux-sunxi] Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC icenowy@aosc.io - 2017-05-23 15:10 +0200
Re: [linux-sunxi] Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-05-24 09:40 +0200
Re: [linux-sunxi] Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC Icenowy Zheng <icenowy@aosc.io> - 2017-05-24 10:30 +0200
Re: [linux-sunxi] Re: [RFC PATCH 07/11] drm: sun4i: add support for the TV encoder in H3 SoC Jernej Škrabec <jernej.skrabec@siol.net> - 2017-05-24 17:30 +0200
[RFC PATCH 08/11] clk: sunxi-ng: allow CLK_DE to set CLK_PLL_DE for H3 Icenowy Zheng <icenowy@aosc.io> - 2017-05-17 19:10 +0200
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