linux-kernel - RE: [PATCH v2 5/9] drm/panel: Add timings field to drm

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Message-ID: <TY1PR01MB1770F80560B2B2DFEE2F3BB7C0AC0@TY1PR01MB1770.jpnprd01.prod.outlook.com>
Date:   Thu, 15 Aug 2019 13:49:09 +0000
From:   Fabrizio Castro <fabrizio.castro@...renesas.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
CC:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Sean Paul <sean@...rly.run>,
        Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Sam Ravnborg <sam@...nborg.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Simon Horman <horms@...ge.net.au>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Jacopo Mondi <jacopo+renesas@...ndi.org>
Subject: RE: [PATCH v2 5/9] drm/panel: Add timings field to drm_panel

Hello Laurent,

Thank you for your feedback!

> From: linux-renesas-soc-owner@...r.kernel.org <linux-renesas-soc-owner@...r.kernel.org> On Behalf Of Laurent Pinchart
> Sent: 15 August 2019 13:03
> Subject: Re: [PATCH v2 5/9] drm/panel: Add timings field to drm_panel
> 
> Hi Fabrizio,
> 
> Thank you for the patch.
> 
> On Thu, Aug 15, 2019 at 12:04:29PM +0100, Fabrizio Castro wrote:
> > We need to know if the panel supports dual-link, similarly
> > to bridges, therefore add a reference to drm_timings in
> > drm_panel.
> 
> Panels may also need to report setup/hold time, so it's not about
> dual-link only. I would make this explicit in the commit message.

Ok

> 
> > Signed-off-by: Fabrizio Castro <fabrizio.castro@...renesas.com>
> >
> > ---
> > v1->v2:
> > * new patch
> >
> >  include/drm/drm_panel.h | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h
> > index 8c738c0..cd6ff07 100644
> > --- a/include/drm/drm_panel.h
> > +++ b/include/drm/drm_panel.h
> > @@ -26,6 +26,7 @@
> >
> >  #include <linux/errno.h>
> >  #include <linux/list.h>
> > +#include <drm/drm_timings.h>
> 
> You can just add a forward-declaration of struct drm_timing.

Ok

Thanks,
Fab

> 
> >
> >  struct device_node;
> >  struct drm_connector;
> > @@ -81,6 +82,7 @@ struct drm_panel_funcs {
> >   * struct drm_panel - DRM panel object
> >   * @drm: DRM device owning the panel
> >   * @connector: DRM connector that the panel is attached to
> > + * @timings: timing information
> >   * @dev: parent device of the panel
> >   * @link: link from panel device (supplier) to DRM device (consumer)
> >   * @funcs: operations that can be performed on the panel
> > @@ -89,6 +91,7 @@ struct drm_panel_funcs {
> >  struct drm_panel {
> >  	struct drm_device *drm;
> >  	struct drm_connector *connector;
> > +	const struct drm_timings *timings;
> >  	struct device *dev;
> >
> >  	const struct drm_panel_funcs *funcs;
> 
> --
> Regards,
> 
> Laurent Pinchart