linux-kernel - Re: [PATCH v2 05/10] drm: bridge: dw_hdmi: Fold poweron and setup functions

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Message-ID: <ff114d4e-11f6-4fe7-9963-a30874f4df17@linaro.org>
Date: Fri, 13 Sep 2024 10:06:41 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Jonas Karlman <jonas@...boo.se>, Andrzej Hajda <andrzej.hajda@...el.com>,
 Robert Foss <rfoss@...nel.org>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
 Jernej Skrabec <jernej.skrabec@...il.com>
Cc: Christian Hewitt <christianshewitt@...il.com>,
 Diederik de Haas <didi.debian@...ow.org>,
 Christopher Obbard <chris.obbard@...labora.com>,
 dri-devel@...ts.freedesktop.org, linux-rockchip@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 05/10] drm: bridge: dw_hdmi: Fold poweron and setup
 functions

On 08/09/2024 15:28, Jonas Karlman wrote:
> Fold the poweron and setup functions into one function and use the
> adjusted_mode directly from the new crtc_state to remove the need of
> storing previous_mode.
> 
> Signed-off-by: Jonas Karlman <jonas@...boo.se>
> ---
> v2: No change
> ---
>   drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 21 ++++++++-------------
>   1 file changed, 8 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 87fb6fd5cffd..1eefa633ff78 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -2236,9 +2236,9 @@ static void hdmi_disable_overflow_interrupts(struct dw_hdmi *hdmi)
>   		    HDMI_IH_MUTE_FC_STAT2);
>   }
>   
> -static int dw_hdmi_setup(struct dw_hdmi *hdmi,
> -			 const struct drm_connector *connector,
> -			 const struct drm_display_mode *mode)
> +static int dw_hdmi_poweron(struct dw_hdmi *hdmi,
> +			   const struct drm_connector *connector,
> +			   const struct drm_display_mode *mode)
>   {
>   	const struct drm_display_info *display = &connector->display_info;
>   	int ret;
> @@ -2378,15 +2378,6 @@ static void initialize_hdmi_ih_mutes(struct dw_hdmi *hdmi)
>   	hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
>   }
>   
> -static void dw_hdmi_poweron(struct dw_hdmi *hdmi)
> -{
> -	/*
> -	 * The curr_conn field is guaranteed to be valid here, as this function
> -	 * is only be called when !hdmi->disabled.
> -	 */
> -	dw_hdmi_setup(hdmi, hdmi->curr_conn, &hdmi->previous_mode);
> -}
> -
>   static void dw_hdmi_poweroff(struct dw_hdmi *hdmi)
>   {
>   	if (hdmi->phy.enabled) {
> @@ -2936,15 +2927,19 @@ static void dw_hdmi_bridge_atomic_enable(struct drm_bridge *bridge,
>   {
>   	struct dw_hdmi *hdmi = bridge->driver_private;
>   	struct drm_atomic_state *state = old_state->base.state;
> +	const struct drm_display_mode *mode;
>   	struct drm_connector *connector;
> +	struct drm_crtc *crtc;
>   
>   	connector = drm_atomic_get_new_connector_for_encoder(state,
>   							     bridge->encoder);
> +	crtc = drm_atomic_get_new_connector_state(state, connector)->crtc;
> +	mode = &drm_atomic_get_new_crtc_state(state, crtc)->adjusted_mode;
>   
>   	mutex_lock(&hdmi->mutex);
>   	hdmi->disabled = false;
>   	hdmi->curr_conn = connector;
> -	dw_hdmi_poweron(hdmi);
> +	dw_hdmi_poweron(hdmi, connector, mode);
>   	dw_hdmi_update_phy_mask(hdmi);
>   	handle_plugged_change(hdmi, true);
>   	mutex_unlock(&hdmi->mutex);

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>