Re: [PATCH] drm: Improve the output_poll_changed description

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On Tue, Jan 12, 2021 at 06:46:44PM +0800, ZhiJie.Zhang wrote:
> From: zhangzhijie <zhangzhijie@xxxxxxxxxxx>
> 
> codeview the implementation of few Drivers.

I'm not really understanding what you're trying to say here.

> this callback was used by drm_kms_helper_hotplug_event()
> 
> Signed-off-by: zhangzhijie <zhangzhijie@xxxxxxxxxxx>
> ---
>  include/drm/drm_mode_config.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
> index ab424ddd7665..e01c4d0f07d1 100644
> --- a/include/drm/drm_mode_config.h
> +++ b/include/drm/drm_mode_config.h
> @@ -104,7 +104,7 @@ struct drm_mode_config_funcs {
>  	 * changes.
>  	 *
>  	 * Drivers implementing fbdev emulation with the helpers can call
> -	 * drm_fb_helper_hotplug_changed from this hook to inform the fbdev
> +	 * drm_kms_helper_hotplug_event() from this hook to inform the fbdev
>  	 * helper of output changes.

I think since we touch this, maybe better to revamp it complete. The best
way to handle all this is by registering a struct drm_client, since that
provides the &drm_client_funcs.hotplug callback. Also for fbdev support
drivers shouldn't even use that, but instead use the
drm_fbdev_generic_setup() function, which takes care of everything.

I think we can also remove the FIXME below, since with the drm_client
infrastructure and the generic fbdev emulation we've resolved this all
very neatly now.

Can you please respin with my suggestions taking into account somehow?

Thanks, Daniel

>  	 *
>  	 * FIXME:
> -- 
> 2.29.2
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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