linux-kernel - Re: [PATCH] drm/panel: otm8009a: allow using non-continuous dsi clock

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Message-ID: <20200924195233.GE1223313@ravnborg.org>
Date:   Thu, 24 Sep 2020 21:52:33 +0200
From:   Sam Ravnborg <sam@...nborg.org>
To:     Yannick Fertre <yannick.fertre@...com>
Cc:     Philippe Cornu <philippe.cornu@...com>,
        Antonio Borneo <antonio.borneo@...com>,
        Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/panel: otm8009a: allow using non-continuous dsi clock

On Fri, Sep 18, 2020 at 01:47:26PM +0200, Yannick Fertre wrote:
> From: Antonio Borneo <antonio.borneo@...com>
> 
> The panel is able to work when dsi clock is non-continuous, thus
> the system power consumption can be reduced using such feature.
> 
> Add MIPI_DSI_CLOCK_NON_CONTINUOUS to panel's mode_flags.
> 
> Signed-off-by: Antonio Borneo <antonio.borneo@...com>

Patch looks good - but I have no clue if the panel supports it or not.
Anyway:
Acked-by: Sam Ravnborg <sam@...nborg.org>

> ---
>  drivers/gpu/drm/panel/panel-orisetech-otm8009a.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
> index b6e377aa1131..6ac1accade80 100644
> --- a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
> +++ b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
> @@ -452,7 +452,7 @@ static int otm8009a_probe(struct mipi_dsi_device *dsi)
>  	dsi->lanes = 2;
>  	dsi->format = MIPI_DSI_FMT_RGB888;
>  	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
> -			  MIPI_DSI_MODE_LPM;
> +			  MIPI_DSI_MODE_LPM | MIPI_DSI_CLOCK_NON_CONTINUOUS;
>  
>  	drm_panel_init(&ctx->panel, dev, &otm8009a_drm_funcs,
>  		       DRM_MODE_CONNECTOR_DSI);
> -- 
> 2.17.1