[PATCH v1 9/9] drm/bridge: Drop unused drm_bridge_chain functions

[Laurent Pinchart]

Hi Sam,

Thank you for the patch.

On Sun, Feb 06, 2022 at 04:44:05PM +0100, Sam Ravnborg wrote:
> The drm_bridge_chain_{pre_enable,enable,disable,post_disable} has no
> users left and we have atomic variants that should be used.
> Drop them so they do not gain new users.
> 
> Adjust a few comments to avoid references to the dropped functions.
> 
> Signed-off-by: Sam Ravnborg <sam at ravnborg.org>
> Reviewed-by: Maxime Ripard <maxime at cerno.tech>

Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

> Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> Cc: Maxime Ripard <mripard at kernel.org>
> Cc: Thomas Zimmermann <tzimmermann at suse.de>
> Cc: Andrzej Hajda <a.hajda at samsung.com>
> Cc: Neil Armstrong <narmstrong at baylibre.com>
> Cc: Robert Foss <robert.foss at linaro.org>
> Cc: Daniel Vetter <daniel at ffwll.ch>
> ---
>  drivers/gpu/drm/drm_bridge.c | 110 -----------------------------------
>  include/drm/drm_bridge.h     |  28 ---------
>  2 files changed, 138 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
> index c96847fc0ebc..7a57d6816105 100644
> --- a/drivers/gpu/drm/drm_bridge.c
> +++ b/drivers/gpu/drm/drm_bridge.c
> @@ -485,61 +485,6 @@ drm_bridge_chain_mode_valid(struct drm_bridge *bridge,
>  }
>  EXPORT_SYMBOL(drm_bridge_chain_mode_valid);
>  
> -/**
> - * drm_bridge_chain_disable - disables all bridges in the encoder chain
> - * @bridge: bridge control structure
> - *
> - * Calls &drm_bridge_funcs.disable op for all the bridges in the encoder
> - * chain, starting from the last bridge to the first. These are called before
> - * calling the encoder's prepare op.
> - *
> - * Note: the bridge passed should be the one closest to the encoder
> - */
> -void drm_bridge_chain_disable(struct drm_bridge *bridge)
> -{
> -	struct drm_encoder *encoder;
> -	struct drm_bridge *iter;
> -
> -	if (!bridge)
> -		return;
> -
> -	encoder = bridge->encoder;
> -	list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) {
> -		if (iter->funcs->disable)
> -			iter->funcs->disable(iter);
> -
> -		if (iter == bridge)
> -			break;
> -	}
> -}
> -EXPORT_SYMBOL(drm_bridge_chain_disable);
> -
> -/**
> - * drm_bridge_chain_post_disable - cleans up after disabling all bridges in the
> - *				   encoder chain
> - * @bridge: bridge control structure
> - *
> - * Calls &drm_bridge_funcs.post_disable op for all the bridges in the
> - * encoder chain, starting from the first bridge to the last. These are called
> - * after completing the encoder's prepare op.
> - *
> - * Note: the bridge passed should be the one closest to the encoder
> - */
> -void drm_bridge_chain_post_disable(struct drm_bridge *bridge)
> -{
> -	struct drm_encoder *encoder;
> -
> -	if (!bridge)
> -		return;
> -
> -	encoder = bridge->encoder;
> -	list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) {
> -		if (bridge->funcs->post_disable)
> -			bridge->funcs->post_disable(bridge);
> -	}
> -}
> -EXPORT_SYMBOL(drm_bridge_chain_post_disable);
> -
>  /**
>   * drm_bridge_chain_mode_set - set proposed mode for all bridges in the
>   *			       encoder chain
> @@ -569,61 +514,6 @@ void drm_bridge_chain_mode_set(struct drm_bridge *bridge,
>  }
>  EXPORT_SYMBOL(drm_bridge_chain_mode_set);
>  
> -/**
> - * drm_bridge_chain_pre_enable - prepares for enabling all bridges in the
> - *				 encoder chain
> - * @bridge: bridge control structure
> - *
> - * Calls &drm_bridge_funcs.pre_enable op for all the bridges in the encoder
> - * chain, starting from the last bridge to the first. These are called
> - * before calling the encoder's commit op.
> - *
> - * Note: the bridge passed should be the one closest to the encoder
> - */
> -void drm_bridge_chain_pre_enable(struct drm_bridge *bridge)
> -{
> -	struct drm_encoder *encoder;
> -	struct drm_bridge *iter;
> -
> -	if (!bridge)
> -		return;
> -
> -	encoder = bridge->encoder;
> -	list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) {
> -		if (iter->funcs->pre_enable)
> -			iter->funcs->pre_enable(iter);
> -
> -		if (iter == bridge)
> -			break;
> -	}
> -}
> -EXPORT_SYMBOL(drm_bridge_chain_pre_enable);
> -
> -/**
> - * drm_bridge_chain_enable - enables all bridges in the encoder chain
> - * @bridge: bridge control structure
> - *
> - * Calls &drm_bridge_funcs.enable op for all the bridges in the encoder
> - * chain, starting from the first bridge to the last. These are called
> - * after completing the encoder's commit op.
> - *
> - * Note that the bridge passed should be the one closest to the encoder
> - */
> -void drm_bridge_chain_enable(struct drm_bridge *bridge)
> -{
> -	struct drm_encoder *encoder;
> -
> -	if (!bridge)
> -		return;
> -
> -	encoder = bridge->encoder;
> -	list_for_each_entry_from(bridge, &encoder->bridge_chain, chain_node) {
> -		if (bridge->funcs->enable)
> -			bridge->funcs->enable(bridge);
> -	}
> -}
> -EXPORT_SYMBOL(drm_bridge_chain_enable);
> -
>  /**
>   * drm_atomic_bridge_chain_disable - disables all bridges in the encoder chain
>   * @bridge: bridge control structure
> diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
> index fc00304be643..ed2e4a8fe510 100644
> --- a/include/drm/drm_bridge.h
> +++ b/include/drm/drm_bridge.h
> @@ -297,12 +297,6 @@ struct drm_bridge_funcs {
>  	 * not enable the display link feeding the next bridge in the chain (if
>  	 * there is one) when this callback is called.
>  	 *
> -	 * Note that this function will only be invoked in the context of an
> -	 * atomic commit. It will not be invoked from
> -	 * &drm_bridge_chain_pre_enable. It would be prudent to also provide an
> -	 * implementation of @pre_enable if you are expecting driver calls into
> -	 * &drm_bridge_chain_pre_enable.
> -	 *
>  	 * The @atomic_pre_enable callback is optional.
>  	 */
>  	void (*atomic_pre_enable)(struct drm_bridge *bridge,
> @@ -323,11 +317,6 @@ struct drm_bridge_funcs {
>  	 * callback must enable the display link feeding the next bridge in the
>  	 * chain if there is one.
>  	 *
> -	 * Note that this function will only be invoked in the context of an
> -	 * atomic commit. It will not be invoked from &drm_bridge_chain_enable.
> -	 * It would be prudent to also provide an implementation of @enable if
> -	 * you are expecting driver calls into &drm_bridge_chain_enable.
> -	 *
>  	 * The @atomic_enable callback is optional.
>  	 */
>  	void (*atomic_enable)(struct drm_bridge *bridge,
> @@ -345,12 +334,6 @@ struct drm_bridge_funcs {
>  	 * The bridge can assume that the display pipe (i.e. clocks and timing
>  	 * signals) feeding it is still running when this callback is called.
>  	 *
> -	 * Note that this function will only be invoked in the context of an
> -	 * atomic commit. It will not be invoked from
> -	 * &drm_bridge_chain_disable. It would be prudent to also provide an
> -	 * implementation of @disable if you are expecting driver calls into
> -	 * &drm_bridge_chain_disable.
> -	 *
>  	 * The @atomic_disable callback is optional.
>  	 */
>  	void (*atomic_disable)(struct drm_bridge *bridge,
> @@ -370,13 +353,6 @@ struct drm_bridge_funcs {
>  	 * signals) feeding it is no longer running when this callback is
>  	 * called.
>  	 *
> -	 * Note that this function will only be invoked in the context of an
> -	 * atomic commit. It will not be invoked from
> -	 * &drm_bridge_chain_post_disable.
> -	 * It would be prudent to also provide an implementation of
> -	 * @post_disable if you are expecting driver calls into
> -	 * &drm_bridge_chain_post_disable.
> -	 *
>  	 * The @atomic_post_disable callback is optional.
>  	 */
>  	void (*atomic_post_disable)(struct drm_bridge *bridge,
> @@ -868,13 +844,9 @@ enum drm_mode_status
>  drm_bridge_chain_mode_valid(struct drm_bridge *bridge,
>  			    const struct drm_display_info *info,
>  			    const struct drm_display_mode *mode);
> -void drm_bridge_chain_disable(struct drm_bridge *bridge);
> -void drm_bridge_chain_post_disable(struct drm_bridge *bridge);
>  void drm_bridge_chain_mode_set(struct drm_bridge *bridge,
>  			       const struct drm_display_mode *mode,
>  			       const struct drm_display_mode *adjusted_mode);
> -void drm_bridge_chain_pre_enable(struct drm_bridge *bridge);
> -void drm_bridge_chain_enable(struct drm_bridge *bridge);
>  
>  int drm_atomic_bridge_chain_check(struct drm_bridge *bridge,
>  				  struct drm_crtc_state *crtc_state,

-- 
Regards,

Laurent Pinchart