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

From: Mark yao
Date: Mon Apr 18 2016 - 22:43:18 EST


On 2016å04æ18æ 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.

--
ïark Yao