Am Sonntag, den 31.07.2016, 21:55 +0200 schrieb Peter Senna Tschudin:
> Add support to attach a drm_bridge to imx-ldb in addition to
> existing support to attach a LVDS panel.
>
> This patch does a simple code refactoring by moving code
> from for_each_child_of_node iterator to a new function named
> imx_ldb_panel_ddc(). This was necessary to allow the panel ddc
> code to run only when the imx_ldb is not attached to a bridge.
>
> Cc: Enric Balletbo i Serra <enric.balletbo at collabora.com>
> Cc: Philipp Zabel <p.zabel at pengutronix.de>
> Cc: Rob Herring <robh at kernel.org>
> Cc: Fabio Estevam <fabio.estevam at nxp.com>
> Cc: David Airlie <airlied at linux.ie>
> Cc: Thierry Reding <treding at nvidia.com>
> Cc: Thierry Reding <thierry.reding at gmail.com>
> Signed-off-by: Peter Senna Tschudin <peter.senna at collabora.com>
> ---
> Changes from V2:
> - Updated to be aplied on top of Liu Ying changes that made imx-ldb atomic.
> - Tested on next-20160729.
[...]
> @@ -469,19 +473,28 @@ static int imx_ldb_register(struct drm_device *drm,
> drm_encoder_init(drm, encoder, &imx_ldb_encoder_funcs,
> DRM_MODE_ENCODER_LVDS, NULL);
>
> - drm_connector_helper_add(&imx_ldb_ch->connector,
> - &imx_ldb_connector_helper_funcs);
> - drm_connector_init(drm, &imx_ldb_ch->connector,
> - &imx_ldb_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
> -
> if (imx_ldb_ch->panel) {
> + drm_connector_helper_add(&imx_ldb_ch->connector,
> + &imx_ldb_connector_helper_funcs);
> + drm_connector_init(drm, &imx_ldb_ch->connector,
> + &imx_ldb_connector_funcs,
> + DRM_MODE_CONNECTOR_LVDS);
This is still not right. We want to add the connector whenever there is
no bridge that brings its own, not only when there is a panel. For
historical reasons, the ldb driver can also work without a panel.
> ret = drm_panel_attach(imx_ldb_ch->panel,
> - &imx_ldb_ch->connector);
> + &imx_ldb_ch->connector);
What is the purpose of this change?
> if (ret)
> return ret;
> }
>
> - drm_mode_connector_attach_encoder(&imx_ldb_ch->connector, encoder);
Where is this gone?
> + if (imx_ldb_ch->bridge) {
> + imx_ldb_ch->bridge->encoder = encoder;
> +
> + imx_ldb_ch->encoder.bridge = imx_ldb_ch->bridge;
> + ret = drm_bridge_attach(drm, imx_ldb_ch->bridge);
> + if (ret) {
> + DRM_ERROR("Failed to initialize bridge with drm\n");
> + return ret;
> + }
> + }
>
> return 0;
> }
regards
Philipp
