On 04/08/2023 13:44, Tomi Valkeinen wrote:
I would rather have a commit message than a blank one.
> Signed-off-by: Tomi Valkeinen <tomi.valkei...@ideasonboard.com>
> ---
> drivers/gpu/drm/bridge/tc358768.c | 64
> +++++++++++++++++++++++++++------------
> 1 file changed, 45 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/tc358768.c
> b/drivers/gpu/drm/bridge/tc358768.c
> index ea19de5509ed..a567f136ddc7 100644
> --- a/drivers/gpu/drm/bridge/tc358768.c
> +++ b/drivers/gpu/drm/bridge/tc358768.c
> @@ -131,8 +131,17 @@ static const char * const tc358768_supplies[] = {
>
> struct tc358768_dsi_output {
> struct mipi_dsi_device *dev;
> +
> + /* Legacy field if DRM_BRIDGE_ATTACH_NO_CONNECTOR is not used */
> struct drm_panel *panel;
> - struct drm_bridge *bridge;
> +
> + /*
> + * If DRM_BRIDGE_ATTACH_NO_CONNECTOR is not used and a panel is attached
> + * to tc358768, 'next_bridge' contains the bridge the driver created
> + * with drm_panel_bridge_add_typed(). Otherwise 'next_bridge' contains
> + * the next bridge the driver found.
> + */
> + struct drm_bridge *next_bridge;
why it is better to call it next_bridge than just bridge? Is there a
prev_bridge also?
> };
>
> struct tc358768_priv {
> @@ -391,8 +400,6 @@ static int tc358768_dsi_host_attach(struct mipi_dsi_host
> *host,
> struct mipi_dsi_device *dev)
> {
> struct tc358768_priv *priv = dsi_host_to_tc358768(host);
> - struct drm_bridge *bridge;
> - struct drm_panel *panel;
> struct device_node *ep;
> int ret;
>
> @@ -420,21 +427,7 @@ static int tc358768_dsi_host_attach(struct mipi_dsi_host
> *host,
> return -ENOTSUPP;
> }
>
> - ret = drm_of_find_panel_or_bridge(host->dev->of_node, 1, 0, &panel,
> - &bridge);
> - if (ret)
> - return ret;
> -
> - if (panel) {
> - bridge = drm_panel_bridge_add_typed(panel,
> - DRM_MODE_CONNECTOR_DSI);
> - if (IS_ERR(bridge))
> - return PTR_ERR(bridge);
> - }
> -
> priv->output.dev = dev;
> - priv->output.bridge = bridge;
> - priv->output.panel = panel;
>
> priv->dsi_lanes = dev->lanes;
> priv->dsi_bpp = mipi_dsi_pixel_format_to_bpp(dev->format);
> @@ -463,7 +456,7 @@ static int tc358768_dsi_host_detach(struct mipi_dsi_host
> *host,
>
> drm_bridge_remove(&priv->bridge);
> if (priv->output.panel)
> - drm_panel_bridge_remove(priv->output.bridge);
> + drm_panel_bridge_remove(priv->output.next_bridge);
>
> return 0;
> }
> @@ -544,7 +537,40 @@ static int tc358768_bridge_attach(struct drm_bridge
> *bridge,
> return -ENOTSUPP;
> }
>
> - return drm_bridge_attach(bridge->encoder, priv->output.bridge, bridge,
> + if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
> + struct device_node *node;
> +
> + /* Get the next bridge, connected to port@1. */
> + node = of_graph_get_remote_node(priv->dev->of_node, 1, -1);
> + if (!node)
> + return -ENODEV;
> +
> + priv->output.next_bridge = of_drm_find_bridge(node);
> + of_node_put(node);
> + if (!priv->output.next_bridge)
> + return -EPROBE_DEFER;
> + } else {
> + struct drm_bridge *bridge;
> + struct drm_panel *panel;
> + int ret;
> +
> + ret = drm_of_find_panel_or_bridge(priv->dev->of_node, 1, 0,
> + &panel, &bridge);
> + if (ret)
> + return ret;
> +
> + if (panel) {
> + bridge = drm_panel_bridge_add_typed(panel,
> + DRM_MODE_CONNECTOR_DSI);
> + if (IS_ERR(bridge))
> + return PTR_ERR(bridge);
> + }
> +
> + priv->output.next_bridge = bridge;
> + priv->output.panel = panel;
> + }
> +
> + return drm_bridge_attach(bridge->encoder, priv->output.next_bridge,
> bridge,
> flags);
> }
>
>
--
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