linux-kernel - Re: [PATCH v4 6/9] drm/bridge: cdns: Separate DSI and D-PHY configuration

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Date:   Mon, 21 Jan 2019 16:43:28 +0100
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Sean Paul <sean@...rly.run>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        linux-media@...r.kernel.org,
        Archit Taneja <architt@...eaurora.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Chen-Yu Tsai <wens@...e.org>, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        Krzysztof Witos <kwitos@...ence.com>,
        Rafal Ciepiela <rafalc@...ence.com>
Subject: Re: [PATCH v4 6/9] drm/bridge: cdns: Separate DSI and D-PHY
 configuration

On Thu, Jan 17, 2019 at 08:33:38AM -0500, Sean Paul wrote:
> > @@ -768,49 +769,90 @@ static int cdns_dsi_mode2cfg(struct cdns_dsi *dsi,
> >  
> >  		dsi_cfg->hsa = dpi_to_dsi_timing(tmp, bpp,
> >  						 DSI_HSA_FRAME_OVERHEAD);
> > -		dsi_htotal += dsi_cfg->hsa + DSI_HSA_FRAME_OVERHEAD;
> > -		dsi_hss_hsa_hse_hbp += dsi_cfg->hsa + DSI_HSA_FRAME_OVERHEAD;
> >  	}
> >  
> >  	dsi_cfg->hact = dpi_to_dsi_timing(mode_valid_check ?
> >  					  mode->hdisplay : mode->crtc_hdisplay,
> >  					  bpp, 0);
> > -	dsi_htotal += dsi_cfg->hact;
> > +	dsi_cfg->hfp = dpi_to_dsi_timing(mode_to_dpi_hfp(mode), bpp,
> > +					 DSI_HFP_FRAME_OVERHEAD);
> 
> We're throwing away the mode_valid_check switch here to flip between crtc_h*
> value and h* value. Is that intentional? We're using it above for hdisplay, so
> it's a bit confusing.

ah, right, thanks for spotting this.

I'll resend a version with those changes, thanks!
Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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