On Fri, Oct 18, 2024 at 02:48:13PM +0800, Liu Ying wrote:
> Initialize a connector by calling drm_bridge_connector_init() for
> each encoder so that down stream bridge drivers don't need to create
> connectors any more.
>
> Signed-off-by: Liu Ying <victor....@nxp.com>
> ---
> drivers/gpu/drm/mxsfb/Kconfig | 1 +
> drivers/gpu/drm/mxsfb/lcdif_drv.c | 17 ++++++++++++++++-
> 2 files changed, 17 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/mxsfb/Kconfig b/drivers/gpu/drm/mxsfb/Kconfig
> index 264e74f45554..06c95e556380 100644
> --- a/drivers/gpu/drm/mxsfb/Kconfig
> +++ b/drivers/gpu/drm/mxsfb/Kconfig
> @@ -27,6 +27,7 @@ config DRM_IMX_LCDIF
> depends on DRM && OF
> depends on COMMON_CLK
> depends on ARCH_MXC || COMPILE_TEST
> + select DRM_BRIDGE_CONNECTOR
> select DRM_CLIENT_SELECTION
Missing `select DRM_DISPLAY_HELPER`. LGTM otherwise.
> select DRM_MXS
> select DRM_KMS_HELPER
> diff --git a/drivers/gpu/drm/mxsfb/lcdif_drv.c
> b/drivers/gpu/drm/mxsfb/lcdif_drv.c
> index 58ccad9c425d..d4521da6675e 100644
> --- a/drivers/gpu/drm/mxsfb/lcdif_drv.c
> +++ b/drivers/gpu/drm/mxsfb/lcdif_drv.c
> @@ -16,7 +16,9 @@
>
> #include <drm/drm_atomic_helper.h>
> #include <drm/drm_bridge.h>
> +#include <drm/drm_bridge_connector.h>
> #include <drm/drm_client_setup.h>
> +#include <drm/drm_connector.h>
> #include <drm/drm_drv.h>
> #include <drm/drm_encoder.h>
> #include <drm/drm_fbdev_dma.h>
> @@ -56,6 +58,7 @@ static int lcdif_attach_bridge(struct lcdif_drm_private
> *lcdif)
> struct device_node *remote;
> struct of_endpoint of_ep;
> struct drm_encoder *encoder;
> + struct drm_connector *connector;
>
> remote = of_graph_get_remote_port_parent(ep);
> if (!of_device_is_available(remote)) {
> @@ -97,13 +100,25 @@ static int lcdif_attach_bridge(struct lcdif_drm_private
> *lcdif)
> return ret;
> }
>
> - ret = drm_bridge_attach(encoder, bridge, NULL, 0);
> + ret = drm_bridge_attach(encoder, bridge, NULL,
> + DRM_BRIDGE_ATTACH_NO_CONNECTOR);
> if (ret) {
> of_node_put(ep);
> return dev_err_probe(dev, ret,
> "Failed to attach bridge for
> endpoint%u\n",
> of_ep.id);
> }
> +
> + connector = drm_bridge_connector_init(lcdif->drm, encoder);
> + if (IS_ERR(connector)) {
> + ret = PTR_ERR(connector);
> + dev_err(dev, "Failed to initialize bridge connector:
> %d\n",
> + ret);
> + of_node_put(ep);
> + return ret;
> + }
> +
> + drm_connector_attach_encoder(connector, encoder);
> }
>
> return 0;
> --
> 2.34.1
>
--
With best wishes
Dmitry
