From: Matt Redfearn matt.redfearn@thinci.com
[ Upstream commit 83f35bc3a852f1c3892c7474998c5cec707c7ba3 ]
In contrast to all of the DSI panel drivers in drivers/gpu/drm/panel which attach to the DSI host via mipi_dsi_attach() at probe time, the ADV7533 bridge device does not. Instead it defers this to the point that the upstream device connects to its bridge via drm_bridge_attach(). The generic Synopsys MIPI DSI host driver does not register it's own drm_bridge until the MIPI DSI has attached. But it does not call drm_bridge_attach() on the downstream device until the upstream device has attached. This leads to a chicken and the egg failure and the DRM pipeline does not complete. Since all other mipi_dsi_device drivers call mipi_dsi_attach() in probe(), make the adv7533 mipi_dsi_device do the same. This ensures that the Synopsys MIPI DSI host registers it's bridge such that it is available for the upstream device to connect to.
Signed-off-by: Matt Redfearn matt.redfearn@thinci.com Signed-off-by: Andrzej Hajda a.hajda@samsung.com Link: https://patchwork.freedesktop.org/patch/msgid/20190627151740.2277-1-matt.red... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index e7ddd3e3db920..807827bd910e5 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c @@ -874,9 +874,6 @@ static int adv7511_bridge_attach(struct drm_bridge *bridge) &adv7511_connector_helper_funcs); drm_connector_attach_encoder(&adv->connector, bridge->encoder);
- if (adv->type == ADV7533) - ret = adv7533_attach_dsi(adv); - if (adv->i2c_main->irq) regmap_write(adv->regmap, ADV7511_REG_INT_ENABLE(0), ADV7511_INT0_HPD); @@ -1222,8 +1219,17 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id) drm_bridge_add(&adv7511->bridge);
adv7511_audio_init(dev, adv7511); + + if (adv7511->type == ADV7533) { + ret = adv7533_attach_dsi(adv7511); + if (ret) + goto err_remove_bridge; + } + return 0;
+err_remove_bridge: + drm_bridge_remove(&adv7511->bridge); err_unregister_cec: i2c_unregister_device(adv7511->i2c_cec); if (adv7511->cec_clk)