[PATCH 02/16] drm/fb-helper: dpms_legacy(): Only set on connectors in use

[Daniel Vetter]

On Tue, Mar 26, 2019 at 06:55:32PM +0100, Noralf Trønnes wrote:
> For each enabled crtc the functions sets dpms on all registered connectors.
> Limit this to only doing it once and on the connectors actually in use.
> 
> Signed-off-by: Noralf Trønnes <noralf at tronnes.org>
Fixes: 023eb571a1d0 ("drm: correctly update connector DPMS status in drm_fb_helper")
Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

Just want to trick the AUTOSEL bot into cherrypicking a silly patch onto
-stable :-)

-Daniel

> ---
>  drivers/gpu/drm/drm_fb_helper.c | 11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index eea15465da7a..b91df658db59 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -639,20 +639,19 @@ static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
>  static void dpms_legacy(struct drm_fb_helper *fb_helper, int dpms_mode)
>  {
>  	struct drm_device *dev = fb_helper->dev;
> -	struct drm_crtc *crtc;
>  	struct drm_connector *connector;
> +	struct drm_mode_set *modeset;
>  	int i, j;
>  
>  	drm_modeset_lock_all(dev);
>  	for (i = 0; i < fb_helper->crtc_count; i++) {
> -		crtc = fb_helper->crtc_info[i].mode_set.crtc;
> +		modeset = &fb_helper->crtc_info[i].mode_set;
>  
> -		if (!crtc->enabled)
> +		if (!modeset->crtc->enabled)
>  			continue;
>  
> -		/* Walk the connectors & encoders on this fb turning them on/off */
> -		drm_fb_helper_for_each_connector(fb_helper, j) {
> -			connector = fb_helper->connector_info[j]->connector;
> +		for (j = 0; j < modeset->num_connectors; j++) {
> +			connector = modeset->connectors[j];
>  			connector->funcs->dpms(connector, dpms_mode);
>  			drm_object_property_set_value(&connector->base,
>  				dev->mode_config.dpms_property, dpms_mode);
> -- 
> 2.20.1
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch