Re: [PATCH v3 02/12] drm/panel: Move [un]prepare and [dis|en]able functions

From: Daniel Vetter <daniel@ffwll.ch>
To: Sean Paul <seanpaul@chromium.org>
Cc: dri-devel@lists.freedesktop.org, thierry.reding@gmail.com,
	Daniel Vetter <daniel.vetter@intel.com>
Subject: Re: [PATCH v3 02/12] drm/panel: Move [un]prepare and [dis|en]able functions
Date: Wed, 18 Oct 2017 10:16:54 +0200	[thread overview]
Message-ID: <20171018081654.2yjtzipwhfxdv7yb@phenom.ffwll.local> (raw)
In-Reply-To: <20171017211321.7992-3-seanpaul@chromium.org>

On Tue, Oct 17, 2017 at 05:13:05PM -0400, Sean Paul wrote:
> In preparation for state tracking in drm_panel, move the panel functions
> into drm_panel.c so we beef them up in later patches.
> 
> Signed-off-by: Sean Paul <seanpaul@chromium.org>

I'll take the easy ones, on patches 1&2:

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

> ---
> New in v3
> 
>  drivers/gpu/drm/drm_panel.c | 77 ++++++++++++++++++++++++++++++++++++++++++++
>  include/drm/drm_panel.h     | 78 +++------------------------------------------
>  2 files changed, 82 insertions(+), 73 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c
> index 308d442a531b..6f28598a5d0e 100644
> --- a/drivers/gpu/drm/drm_panel.c
> +++ b/drivers/gpu/drm/drm_panel.c
> @@ -126,6 +126,83 @@ int drm_panel_detach(struct drm_panel *panel)
>  }
>  EXPORT_SYMBOL(drm_panel_detach);
>  
> +/**
> + * drm_panel_unprepare - power off a panel
> + * @panel: DRM panel
> + *
> + * Calling this function will completely power off a panel (assert the panel's
> + * reset, turn off power supplies, ...). After this function has completed, it
> + * is usually no longer possible to communicate with the panel until another
> + * call to drm_panel_prepare().
> + *
> + * Return: 0 on success or a negative error code on failure.
> + */
> +int drm_panel_unprepare(struct drm_panel *panel)
> +{
> +	if (panel && panel->funcs && panel->funcs->unprepare)
> +		return panel->funcs->unprepare(panel);
> +
> +	return panel ? -ENOSYS : -EINVAL;
> +}
> +EXPORT_SYMBOL(drm_panel_unprepare);
> +
> +/**
> + * drm_panel_disable - disable a panel
> + * @panel: DRM panel
> + *
> + * This will typically turn off the panel's backlight or disable the display
> + * drivers. For smart panels it should still be possible to communicate with
> + * the integrated circuitry via any command bus after this call.
> + *
> + * Return: 0 on success or a negative error code on failure.
> + */
> +int drm_panel_disable(struct drm_panel *panel)
> +{
> +	if (panel && panel->funcs && panel->funcs->disable)
> +		return panel->funcs->disable(panel);
> +
> +	return panel ? -ENOSYS : -EINVAL;
> +}
> +EXPORT_SYMBOL(drm_panel_disable);
> +
> +/**
> + * drm_panel_prepare - power on a panel
> + * @panel: DRM panel
> + *
> + * Calling this function will enable power and deassert any reset signals to
> + * the panel. After this has completed it is possible to communicate with any
> + * integrated circuitry via a command bus.
> + *
> + * Return: 0 on success or a negative error code on failure.
> + */
> +int drm_panel_prepare(struct drm_panel *panel)
> +{
> +	if (panel && panel->funcs && panel->funcs->prepare)
> +		return panel->funcs->prepare(panel);
> +
> +	return panel ? -ENOSYS : -EINVAL;
> +}
> +EXPORT_SYMBOL(drm_panel_prepare);
> +
> +/**
> + * drm_panel_enable - enable a panel
> + * @panel: DRM panel
> + *
> + * Calling this function will cause the panel display drivers to be turned on
> + * and the backlight to be enabled. Content will be visible on screen after
> + * this call completes.
> + *
> + * Return: 0 on success or a negative error code on failure.
> + */
> +int drm_panel_enable(struct drm_panel *panel)
> +{
> +	if (panel && panel->funcs && panel->funcs->enable)
> +		return panel->funcs->enable(panel);
> +
> +	return panel ? -ENOSYS : -EINVAL;
> +}
> +EXPORT_SYMBOL(drm_panel_enable);
> +
>  #ifdef CONFIG_OF
>  /**
>   * of_drm_find_panel - look up a panel using a device tree node
> diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h
> index ab59d71a24c3..0a9442069d3c 100644
> --- a/include/drm/drm_panel.h
> +++ b/include/drm/drm_panel.h
> @@ -95,79 +95,6 @@ struct drm_panel {
>  	struct list_head list;
>  };
>  
> -/**
> - * drm_panel_unprepare - power off a panel
> - * @panel: DRM panel
> - *
> - * Calling this function will completely power off a panel (assert the panel's
> - * reset, turn off power supplies, ...). After this function has completed, it
> - * is usually no longer possible to communicate with the panel until another
> - * call to drm_panel_prepare().
> - *
> - * Return: 0 on success or a negative error code on failure.
> - */
> -static inline int drm_panel_unprepare(struct drm_panel *panel)
> -{
> -	if (panel && panel->funcs && panel->funcs->unprepare)
> -		return panel->funcs->unprepare(panel);
> -
> -	return panel ? -ENOSYS : -EINVAL;
> -}
> -
> -/**
> - * drm_panel_disable - disable a panel
> - * @panel: DRM panel
> - *
> - * This will typically turn off the panel's backlight or disable the display
> - * drivers. For smart panels it should still be possible to communicate with
> - * the integrated circuitry via any command bus after this call.
> - *
> - * Return: 0 on success or a negative error code on failure.
> - */
> -static inline int drm_panel_disable(struct drm_panel *panel)
> -{
> -	if (panel && panel->funcs && panel->funcs->disable)
> -		return panel->funcs->disable(panel);
> -
> -	return panel ? -ENOSYS : -EINVAL;
> -}
> -
> -/**
> - * drm_panel_prepare - power on a panel
> - * @panel: DRM panel
> - *
> - * Calling this function will enable power and deassert any reset signals to
> - * the panel. After this has completed it is possible to communicate with any
> - * integrated circuitry via a command bus.
> - *
> - * Return: 0 on success or a negative error code on failure.
> - */
> -static inline int drm_panel_prepare(struct drm_panel *panel)
> -{
> -	if (panel && panel->funcs && panel->funcs->prepare)
> -		return panel->funcs->prepare(panel);
> -
> -	return panel ? -ENOSYS : -EINVAL;
> -}
> -
> -/**
> - * drm_panel_enable - enable a panel
> - * @panel: DRM panel
> - *
> - * Calling this function will cause the panel display drivers to be turned on
> - * and the backlight to be enabled. Content will be visible on screen after
> - * this call completes.
> - *
> - * Return: 0 on success or a negative error code on failure.
> - */
> -static inline int drm_panel_enable(struct drm_panel *panel)
> -{
> -	if (panel && panel->funcs && panel->funcs->enable)
> -		return panel->funcs->enable(panel);
> -
> -	return panel ? -ENOSYS : -EINVAL;
> -}
> -
>  /**
>   * drm_panel_get_modes - probe the available display modes of a panel
>   * @panel: DRM panel
> @@ -194,6 +121,11 @@ void drm_panel_remove(struct drm_panel *panel);
>  int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector);
>  int drm_panel_detach(struct drm_panel *panel);
>  
> +int drm_panel_unprepare(struct drm_panel *panel);
> +int drm_panel_disable(struct drm_panel *panel);
> +int drm_panel_prepare(struct drm_panel *panel);
> +int drm_panel_enable(struct drm_panel *panel);
> +
>  #if defined(CONFIG_OF) && defined(CONFIG_DRM_PANEL)
>  struct drm_panel *of_drm_find_panel(const struct device_node *np);
>  #else
> -- 
> 2.15.0.rc1.287.g2b38de12cc-goog
> 

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