[PATCH 1/5] drm/bridge: tc358762: Split register programming from pre-enable to enable

[Sam Ravnborg]

Hi Marek,

On Thu, Jun 15, 2023 at 10:18:58PM +0200, Marek Vasut wrote:
> Move the register programming part, which actually enables the bridge and
> makes it push data out of its DPI side, into the enable callback. The DSI
> host like DSIM may not be able to transmit commands in pre_enable, moving
> the register programming into enable assures it can transmit commands.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>

I was about to complain that the use of .enable is deprecated, but the
following patch fixes this.
So:
Reviewed-by: Sam Ravnborg <sam at ravnborg.org>


> ---
> Cc: Andrzej Hajda <andrzej.hajda at intel.com>
> Cc: Daniel Vetter <daniel at ffwll.ch>
> Cc: David Airlie <airlied at gmail.com>
> Cc: Jernej Skrabec <jernej.skrabec at gmail.com>
> Cc: Jonas Karlman <jonas at kwiboo.se>
> Cc: Laurent Pinchart <Laurent.pinchart at ideasonboard.com>
> Cc: Neil Armstrong <neil.armstrong at linaro.org>
> Cc: Robert Foss <rfoss at kernel.org>
> Cc: dri-devel at lists.freedesktop.org
> ---
>  drivers/gpu/drm/bridge/tc358762.c | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/tc358762.c b/drivers/gpu/drm/bridge/tc358762.c
> index 5641395fd310e..df9703eacab1f 100644
> --- a/drivers/gpu/drm/bridge/tc358762.c
> +++ b/drivers/gpu/drm/bridge/tc358762.c
> @@ -162,11 +162,17 @@ static void tc358762_pre_enable(struct drm_bridge *bridge)
>  		usleep_range(5000, 10000);
>  	}
>  
> +	ctx->pre_enabled = true;
> +}
> +
> +static void tc358762_enable(struct drm_bridge *bridge)
> +{
> +	struct tc358762 *ctx = bridge_to_tc358762(bridge);
> +	int ret;
> +
>  	ret = tc358762_init(ctx);
>  	if (ret < 0)
>  		dev_err(ctx->dev, "error initializing bridge (%d)\n", ret);
> -
> -	ctx->pre_enabled = true;
>  }
>  
>  static int tc358762_attach(struct drm_bridge *bridge,
> @@ -181,6 +187,7 @@ static int tc358762_attach(struct drm_bridge *bridge,
>  static const struct drm_bridge_funcs tc358762_bridge_funcs = {
>  	.post_disable = tc358762_post_disable,
>  	.pre_enable = tc358762_pre_enable,
> +	.enable = tc358762_enable,
>  	.attach = tc358762_attach,
>  };
>  
> -- 
> 2.39.2