On Mon, 24 Jun 2024 at 14:32, Alexander Stein
<alexander.stein@xxxxxxxxxxxxxxx> wrote:
>
> Hi,
>
> Am Montag, 24. Juni 2024, 12:31:46 CEST schrieb Dmitry Baryshkov:
> > Existing in-kernel device trees use LCDIF with the dsim + adv7533, dsim
> > + tc358762 or with ldb + panel_bridge. All these combinations support
> > using DRM_BRIDGE_ATTACH_NO_CONNECTOR for bridge attachment.
> >
> > Change lcdif driver to use this flag when attaching the bridge and
> > create drm_bridge_connector afterwards.
> >
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
> > ---
> > Note: compile-tested only.
>
> I gave it a try, but it doesn't work. Despite DSI output it also breaks
> HDMI output, where I at least some error messages:
> [drm:drm_bridge_attach] *ERROR* failed to attach bridge /soc@0/bus@32c00000/hdmi@32fd8000 to encoder None-37: -22
> [drm:drm_bridge_attach] *ERROR* failed to attach bridge /soc@0/bus@32c00000/display-bridge@32fc4000 to encoder None-37: -22
> imx-lcdif 32fc6000.display-controller: error -EINVAL: Failed to attach bridge for endpoint0
> imx-lcdif 32fc6000.display-controller: error -EINVAL: Cannot connect bridge
> imx-lcdif 32fc6000.display-controller: probe with driver imx-lcdif failed with error -22
Could you please try it with the following change:
diff --git a/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
index 13bc570c5473..c87d3e55c00d 100644
--- a/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
+++ b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
@@ -94,6 +94,7 @@ static int imx8mp_dw_hdmi_probe(struct platform_device *pdev)
plat_data->phy_name = "SAMSUNG HDMI TX PHY";
plat_data->priv_data = hdmi;
plat_data->phy_force_vendor = true;
+ plat_data->output_port = 1;
hdmi->dw_hdmi = dw_hdmi_probe(pdev, plat_data);
if (IS_ERR(hdmi->dw_hdmi))
>
> Best regards,
> Alexander
>
> > ---
> > drivers/gpu/drm/mxsfb/lcdif_drv.c | 14 +++++++++++++-
> > 1 file changed, 13 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/mxsfb/lcdif_drv.c b/drivers/gpu/drm/mxsfb/lcdif_drv.c
> > index 0f895b8a99d6..1d5508449995 100644
> > --- a/drivers/gpu/drm/mxsfb/lcdif_drv.c
> > +++ b/drivers/gpu/drm/mxsfb/lcdif_drv.c
> > @@ -16,6 +16,7 @@
> >
> > #include <drm/drm_atomic_helper.h>
> > #include <drm/drm_bridge.h>
> > +#include <drm/drm_bridge_connector.h>
> > #include <drm/drm_drv.h>
> > #include <drm/drm_encoder.h>
> > #include <drm/drm_fbdev_dma.h>
> > @@ -48,6 +49,7 @@ static int lcdif_attach_bridge(struct lcdif_drm_private *lcdif)
> > {
> > struct device *dev = lcdif->drm->dev;
> > struct device_node *ep;
> > + struct drm_connector *connector;
> > struct drm_bridge *bridge;
> > int ret;
> >
> > @@ -96,13 +98,23 @@ 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);
> > + of_node_put(ep);
> > +
> > + return dev_err_probe(dev, ret,
> > + "Failed to create bridge connector for endpoint%u\n",
> > + of_ep.id);
> > + }
> > }
> >
> > return 0;
> >
> > ---
> > base-commit: f76698bd9a8ca01d3581236082d786e9a6b72bb7
> > change-id: 20240624-mxc-lcdif-bridge-attach-60368807b2f9
> >
> > Best regards,
> >
>
>
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>
--
With best wishes
Dmitry
