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drm/bridge: it66121: Wait for next bridge to be probed

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[ Upstream commit 8b03e3fc79 ]

If run before the next bridge is initialized, of_drm_find_bridge() will
give us a NULL pointer.

If that's the case, return -EPROBE_DEFER; we may have more luck next
time.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Fixes: 988156dc2f ("drm: bridge: add it66121 driver")
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210827163956.27517-2-paul@crapouillou.net
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Paul Cercueil
2021-08-27 17:39:56 +01:00
committed by Greg Kroah-Hartman
parent 3c1ccfcae8
commit 5f14a2c464
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/bridge/ite-it66121.c
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@@ -924,6 +924,9 @@ static int it66121_probe(struct i2c_client *client,
ctx->next_bridge = of_drm_find_bridge(ep);
of_node_put(ep);
if (!ctx->next_bridge)
return -EPROBE_DEFER;
i2c_set_clientdata(client, ctx);
mutex_init(&ctx->lock);