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From: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <maxime.ripard@bootlin.com>,
	Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>,
	Daniel Vetter <daniel@ffwll.ch>,
	"dri-devel@lists.freedesktop.org"
	<dri-devel@lists.freedesktop.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Simon Horman <horms@verge.net.au>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Chris Paterson <Chris.Paterson2@renesas.com>,
	Biju Das <biju.das@bp.renesas.com>,
	"linux-renesas-soc@vger.kernel.org" 
	<linux-renesas-soc@vger.kernel.org>,
	Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>,
	Jacopo Mondi <jacopo+renesas@jmondi.org>
Subject: RE: [PATCH v2 4/9] drm/timings: Add link flags
Date: Thu, 15 Aug 2019 15:40:09 +0000
Message-ID: <TYXPR01MB1775593360A56D72CAFE5AD4C0AC0@TYXPR01MB1775.jpnprd01.prod.outlook.com> (raw)
In-Reply-To: <20190815120014.GK5011@pendragon.ideasonboard.com>

Hi Laurent,

Thank you for the feedback!

I think we need to come a conclusion on here:
https://patchwork.kernel.org/patch/11095547/

before taking the comments on this patch any further.

Thanks,
Fab

> From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Sent: 15 August 2019 13:00
> Subject: Re: [PATCH v2 4/9] drm/timings: Add link flags
> 
> Hi Fabrizio,
> 
> Thank you for the patch.
> 
> On Thu, Aug 15, 2019 at 12:04:28PM +0100, Fabrizio Castro wrote:
> > We need more information to describe dual-LVDS links, therefore
> > introduce link_flags.
> >
> > Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
> >
> > ---
> > v1->v2:
> > * new patch
> >
> >  include/drm/drm_timings.h | 26 ++++++++++++++++++++++++++
> >  1 file changed, 26 insertions(+)
> >
> > diff --git a/include/drm/drm_timings.h b/include/drm/drm_timings.h
> > index 4af8814..58fbf1b 100644
> > --- a/include/drm/drm_timings.h
> > +++ b/include/drm/drm_timings.h
> > @@ -1,4 +1,6 @@
> >  /*
> > + * Copyright (C) 2019 Renesas Electronics Corporation
> > + *
> >   * Permission to use, copy, modify, distribute, and sell this software and its
> >   * documentation for any purpose is hereby granted without fee, provided that
> >   * the above copyright notice appear in all copies and that both that copyright
> > @@ -21,6 +23,24 @@
> >  #ifndef __DRM_TIMINGS_H__
> >  #define __DRM_TIMINGS_H__
> >
> > +#include <linux/bits.h>
> > +
> > +/**
> > + * enum drm_link_flags - link_flags for &drm_timings
> > + *
> > + * This enum defines the details of the link.
> > + *
> > + * @DRM_LINK_DUAL_LVDS_ODD_EVEN:	Dual-LVDS link, with odd pixels (1,3,5,
> > + *					etc.) coming through the first port, and
> > + *					even pixels (0,2,4,etc.) coming through
> > + *					the second port. If not specified for a
> > + *					dual-LVDS panel, it is assumed that even
> > + *					pixels are coming through the first port
> > + */
> > +enum drm_link_flags {
> 
> The text will be easier to read if you inline it here.
> 
> 	/**
> 	 * @DRM_LINK_DUAL_LVDS_ODD_EVEN: Dual-LVDS link, with odd pixels (1,3,5,
> 	 * etc.) coming through the first port, and  even pixels (0,2,4,etc.)
> 	 ...
> 
> > +	DRM_LINK_DUAL_LVDS_ODD_EVEN = BIT(0),
> 
> I would remove the dual_link field and add a DRM_LINK_DUAL_LVDS (or
> alternatively two flags, dual lvds odd-even and dual lvds even-odd).
> 
> > +};
> > +
> >  /**
> >   * struct drm_timings - timing information
> >   */
> > @@ -55,6 +75,12 @@ struct drm_timings {
> >  	 * and odd-numbered pixels are received on separate links.
> >  	 */
> >  	bool dual_link;
> > +	/**
> > +	 * @link_flags
> > +	 *
> > +	 * Provides detailed information about the link.
> 
> I think this calls for a bit more information than "detailed
> information". What information do you want to store in this field ?
> 
> > +	 */
> > +	enum drm_link_flags link_flags;
> >  };
> >
> >  #endif /* __DRM_TIMINGS_H__ */
> > --
> > 2.7.4
> >
> 
> --
> Regards,
> 
> Laurent Pinchart

  reply index

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-15 11:04 [PATCH v2 0/9] Add dual-LVDS panel support to EK874 Fabrizio Castro
2019-08-15 11:04 ` [PATCH v2 1/9] dt-bindings: panel: lvds: Add dual-link LVDS display support Fabrizio Castro
2019-08-15 11:45   ` Laurent Pinchart
2019-08-15 13:37     ` Fabrizio Castro
2019-08-15 11:04 ` [PATCH v2 2/9] dt-bindings: display: Add bindings for Advantech IDK-2121WR Fabrizio Castro
2019-08-15 11:47   ` Laurent Pinchart
2019-08-15 13:38     ` Fabrizio Castro
2019-08-15 11:04 ` [PATCH v2 3/9] drm: Rename drm_bridge_timings to drm_timings Fabrizio Castro
2019-08-15 13:18   ` Laurent Pinchart
2019-08-15 13:50     ` Fabrizio Castro
2019-08-15 14:04     ` Greg Kroah-Hartman
2019-08-15 14:14       ` Laurent Pinchart
2019-08-15 14:31         ` Fabrizio Castro
2019-08-15 14:53           ` Greg Kroah-Hartman
2019-08-15 15:01             ` Fabrizio Castro
2019-08-15 18:06             ` Laurent Pinchart
2019-08-15 19:05               ` Greg Kroah-Hartman
2019-08-16  8:11                 ` Fabrizio Castro
2019-08-15 11:04 ` [PATCH v2 4/9] drm/timings: Add link flags Fabrizio Castro
2019-08-15 12:00   ` Laurent Pinchart
2019-08-15 15:40     ` Fabrizio Castro [this message]
2019-08-15 11:04 ` [PATCH v2 5/9] drm/panel: Add timings field to drm_panel Fabrizio Castro
2019-08-15 12:03   ` Laurent Pinchart
2019-08-15 13:49     ` Fabrizio Castro
2019-08-15 14:13   ` Sam Ravnborg
2019-08-15 14:48     ` Fabrizio Castro
2019-08-15 11:04 ` [PATCH v2 6/9] drm: rcar-du: lvds: Fix companion's mode Fabrizio Castro
2019-08-15 11:55   ` Laurent Pinchart
2019-08-15 13:42     ` Fabrizio Castro
2019-08-15 11:04 ` [PATCH v2 7/9] drm: rcar-du: lvds: Add dual-LVDS panels support Fabrizio Castro
2019-08-15 13:08   ` Laurent Pinchart
2019-08-15 15:36     ` Fabrizio Castro
2019-08-20 16:04       ` Laurent Pinchart
2019-08-21 17:00         ` Fabrizio Castro
2019-08-15 11:04 ` [PATCH v2 8/9] drm/panel: lvds: Add support for the IDK-2121WR Fabrizio Castro
2019-08-15 11:04 ` [PATCH v2 9/9] arm64: dts: renesas: Add EK874 board with idk-2121wr display support Fabrizio Castro
2019-08-19 12:03   ` Geert Uytterhoeven
2019-08-20 13:59     ` Fabrizio Castro
2019-08-15 14:15 ` [PATCH v2 0/9] Add dual-LVDS panel support to EK874 Sam Ravnborg
2019-08-15 14:32   ` Fabrizio Castro

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