linux-kernel - Re: [PATCHv4 2/3] drm: add a helper function to extract 'de-active' and 'pixelclk-active' from DT

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Message-ID: <20160815143308.GI6232@phenom.ffwll.local>
Date:	Mon, 15 Aug 2016 16:33:08 +0200
From:	Daniel Vetter <daniel@...ll.ch>
To:	Lothar Waßmann <LW@...O-electronics.de>
Cc:	David Airlie <airlied@...ux.ie>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Daniel Vetter <daniel@...ll.ch>
Subject: Re: [PATCHv4 2/3] drm: add a helper function to extract 'de-active'
 and 'pixelclk-active' from DT

On Tue, Jul 12, 2016 at 03:30:02PM +0200, Lothar Waßmann wrote:
> add a helper function to extract information about pixel clock and DE
> polarity from DT for use by of_get_drm_display_mode().
> While at it, convert spaces to tabs in indentation in drm_modes.h.
> 
> Signed-off-by: Lothar Waßmann <LW@...O-electronics.de>
> ---
>  drivers/gpu/drm/drm_modes.c | 15 +++++++++++++++
>  include/drm/drm_modes.h     |  3 ++-
>  2 files changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
> index fc5040a..51804e5 100644
> --- a/drivers/gpu/drm/drm_modes.c
> +++ b/drivers/gpu/drm/drm_modes.c
> @@ -657,6 +657,21 @@ void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
>  }
>  EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);
>  
> +void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags)

Missing kerneldoc. Please create a patch to fix that so I can pick it up.
Thanks.
-Daniel

> +{
> +	*bus_flags = 0;
> +	if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
> +		*bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
> +	if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
> +		*bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
> +
> +	if (vm->flags & DISPLAY_FLAGS_DE_LOW)
> +		*bus_flags |= DRM_BUS_FLAG_DE_LOW;
> +	if (vm->flags & DISPLAY_FLAGS_DE_HIGH)
> +		*bus_flags |= DRM_BUS_FLAG_DE_HIGH;
> +}
> +EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode);
> +
>  #ifdef CONFIG_OF
>  /**
>   * of_get_drm_display_mode - get a drm_display_mode from devicetree
> diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
> index ff48177..a8164d2 100644
> --- a/include/drm/drm_modes.h
> +++ b/include/drm/drm_modes.h
> @@ -434,7 +434,7 @@ struct drm_cmdline_mode;
>  struct drm_display_mode *drm_mode_create(struct drm_device *dev);
>  void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
>  void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
> -                               const struct drm_display_mode *in);
> +			       const struct drm_display_mode *in);
>  int drm_mode_convert_umode(struct drm_display_mode *out,
>  			   const struct drm_mode_modeinfo *in);
>  void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
> @@ -457,6 +457,7 @@ void drm_display_mode_from_videomode(const struct videomode *vm,
>  				     struct drm_display_mode *dmode);
>  void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
>  				   struct videomode *vm);
> +void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags);
>  int of_get_drm_display_mode(struct device_node *np,
>  			    struct drm_display_mode *dmode,
>  			    int index);
> -- 
> 2.1.4
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch