On Tue, 20 Aug 2019 04:16:44 +0300
Laurent Pinchart <laurent.pinch...@ideasonboard.com> wrote:
> Implement the newly added bridge connector operations, allowing the
> usage of drm_bridge_panel with drm_bridge_connector.
>
> Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> ---
> drivers/gpu/drm/bridge/panel.c | 18 +++++++++++++++++-
> 1 file changed, 17 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
> index f5b8e55301ac..1c7f5b648f05 100644
> --- a/drivers/gpu/drm/bridge/panel.c
> +++ b/drivers/gpu/drm/bridge/panel.c
> @@ -60,7 +60,7 @@ static int panel_bridge_attach(struct drm_bridge *bridge,
> int ret;
>
> if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
> - return -EINVAL;
> + return 0;
>
> if (!bridge->encoder) {
> DRM_ERROR("Missing encoder\n");
> @@ -123,6 +123,18 @@ static void panel_bridge_post_disable(struct drm_bridge
> *bridge)
> drm_panel_unprepare(panel_bridge->panel);
> }
>
> +static int panel_bridge_get_modes(struct drm_bridge *bridge,
> + struct drm_connector *connector)
> +{
> + struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
> +
> + /*
> + * FIXME: drm_panel_get_modes() should take the connector as an
> + * argument.
> + */
> + return drm_panel_get_modes(panel_bridge->panel);
> +}
> +
> static const struct drm_bridge_funcs panel_bridge_bridge_funcs = {
> .attach = panel_bridge_attach,
> .detach = panel_bridge_detach,
> @@ -130,6 +142,7 @@ static const struct drm_bridge_funcs
> panel_bridge_bridge_funcs = {
> .enable = panel_bridge_enable,
> .disable = panel_bridge_disable,
> .post_disable = panel_bridge_post_disable,
> + .get_modes = panel_bridge_get_modes,
> };
>
> /**
> @@ -175,6 +188,9 @@ struct drm_bridge *drm_panel_bridge_add(struct drm_panel
> *panel,
> #ifdef CONFIG_OF
> panel_bridge->bridge.of_node = panel->dev->of_node;
> #endif
> + panel_bridge->bridge.ops = DRM_BRIDGE_OP_MODES;
> + /* FIXME: The panel should report its type. */
> + panel_bridge->bridge.type = DRM_MODE_CONNECTOR_DPI;
Shouldn't we patch all panel drivers to expose this type before doing
this change? I mean, the connector type is exposed to userspace, and I
wouldn't be surprised if some userspace apps/libs decided to base their
output selection logic on this field.
>
> drm_bridge_add(&panel_bridge->bridge);
>
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