linux-kernel - Re: [PATCH 2/2] drm/ingenic: Don't request full modeset if property is not modified

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Message-Id: <3EGGRQ.5XC2ZJHIFWID@crapouillou.net>
Date:   Mon, 12 Apr 2021 15:32:27 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Simon Ser <contact@...rsion.fr>
Cc:     Sam Ravnborg <sam@...nborg.org>, od@...c.me,
        linux-mips@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 2/2] drm/ingenic: Don't request full modeset if property
 is not modified

Can I have an ACK for this patch?

Cheers,
-Paul

Le lun. 29 mars 2021 à 18:50, Paul Cercueil <paul@...pouillou.net> a 
écrit :
> Avoid requesting a full modeset if the sharpness property is not
> modified, because then we don't actually need it.
> 
> Fixes: fc1acf317b01 ("drm/ingenic: Add support for the IPU")
> Cc: <stable@...r.kernel.org> # 5.8+
> Signed-off-by: Paul Cercueil <paul@...pouillou.net>
> ---
>  drivers/gpu/drm/ingenic/ingenic-ipu.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/ingenic/ingenic-ipu.c 
> b/drivers/gpu/drm/ingenic/ingenic-ipu.c
> index 3b1091e7c0cd..95b665c4a7b0 100644
> --- a/drivers/gpu/drm/ingenic/ingenic-ipu.c
> +++ b/drivers/gpu/drm/ingenic/ingenic-ipu.c
> @@ -640,10 +640,12 @@ ingenic_ipu_plane_atomic_set_property(struct 
> drm_plane *plane,
>  {
>  	struct ingenic_ipu *ipu = plane_to_ingenic_ipu(plane);
>  	struct drm_crtc_state *crtc_state;
> +	bool mode_changed;
> 
>  	if (property != ipu->sharpness_prop)
>  		return -EINVAL;
> 
> +	mode_changed = val != ipu->sharpness;
>  	ipu->sharpness = val;
> 
>  	if (state->crtc) {
> @@ -651,7 +653,7 @@ ingenic_ipu_plane_atomic_set_property(struct 
> drm_plane *plane,
>  		if (WARN_ON(!crtc_state))
>  			return -EINVAL;
> 
> -		crtc_state->mode_changed = true;
> +		crtc_state->mode_changed |= mode_changed;
>  	}
> 
>  	return 0;
> --
> 2.30.2
>