Re: [PATCH] drm/rockchip: get rid of rockchip_drm_crtc_mode_config

Mark yao
2016-04-19T02:43:03Z

On 2016年04月18日 17:25, John Keeping wrote:
> On Mon, 18 Apr 2016 11:03:31 +0800, Mark Yao wrote:
>
>> >We need to take care of the vop status when use
>> >rockchip_drm_crtc_mode_config, if vop is disabled,
>> >the function would failed, that is terrible.
>> >
>> >Save connector type and output mode on drm_display_mode->private_flags
>> >at encoder mode_fixup, then we can configure the type and mode safely
>> >on crtc mode_set.
> Since Rockchip is atomic, shouldn't this be using atomic_check hooks and
> a subclassed crtc_state structure?
>
Hi John

I try to use atomic_check with crtc_state, but it seems not easy,
there are two value need transmit from connector to vop: connector type
and out_mode

the connector type I think we can loop the atomic state to find the
connector type.
but the out_mode is a custom value, I can't find a generic way to
transmit it with atomic state.

BTW, I think on atomic side, the drm_display_mode is under control by
atomic state,
and the mode->private_flags is not use by drm framework, I found i915
and gma500 also use
mode->private_flags to transmit custom value.

So I think it's no problem using mode->private_flags.