diff mbox series

[v2,06/10] media: adv748x: only activate DAI if it is described in device tree

Message ID 59bbe09aa6e42b3b226b394dc7edf6ac8e385d47.1584639664.git.alexander.riesen@cetitec.com (mailing list archive)
State Superseded
Delegated to: Kieran Bingham
Headers show
Series media: adv748x: add support for HDMI audio | expand

Commit Message

Alex Riesen March 19, 2020, 5:42 p.m. UTC 
To avoid setting it up even if the hardware is not actually connected
to anything physically.

Besides, the bindings explicitly notes that port definitions are
"optional if they are not connected to anything at the hardware level".

Signed-off-by: Alexander Riesen <alexander.riesen@cetitec.com>
---
 drivers/media/i2c/adv748x/adv748x-dai.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/drivers/media/i2c/adv748x/adv748x-dai.c b/drivers/media/i2c/adv748x/adv748x-dai.c
index 4775a0c7ed7f..ce3ae7de765c 100644
--- a/drivers/media/i2c/adv748x/adv748x-dai.c
+++ b/drivers/media/i2c/adv748x/adv748x-dai.c
@@ -204,6 +204,11 @@  int adv748x_dai_init(struct adv748x_dai *dai)
 	int ret;
 	struct adv748x_state *state = adv748x_dai_to_state(dai);
 
+	if (!state->endpoints[ADV748X_PORT_I2S]) {
+		adv_info(state, "no I2S port, DAI disabled\n");
+		ret = 0;
+		goto fail;
+	}
 	dai->mclk = clk_register_fixed_rate(state->dev,
 					    "adv748x-hdmi-i2s-mclk",
 					    NULL /* parent_name */,