[v2,4/9] drm/timings: Add link flags
diff mbox series

Message ID 1565867073-24746-5-git-send-email-fabrizio.castro@bp.renesas.com
State New
Delegated to: Kieran Bingham
Headers show
Series
  • Add dual-LVDS panel support to EK874
Related show

Commit Message

Fabrizio Castro Aug. 15, 2019, 11:04 a.m. UTC
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(+)

Comments

Laurent Pinchart Aug. 15, 2019, noon UTC | #1
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
>
Fabrizio Castro Aug. 15, 2019, 3:40 p.m. UTC | #2
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

Patch
diff mbox series

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 {
+	DRM_LINK_DUAL_LVDS_ODD_EVEN = BIT(0),
+};
+
 /**
  * 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.
+	 */
+	enum drm_link_flags link_flags;
 };
 
 #endif /* __DRM_TIMINGS_H__ */