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From 461de95d791044faba914125a418cd9141a39f02 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Wed, 31 Oct 2018 14:57:46 +0000
Subject: [PATCH] media: adv7180: Default to the first valid input
The hardware default is differential CVBS on AIN1 & 2, which
isn't very useful.
Select the first input that is defined as valid for the
chip variant (typically CVBS_AIN1).
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
drivers/media/i2c/adv7180.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
--- a/drivers/media/i2c/adv7180.c
+++ b/drivers/media/i2c/adv7180.c
@@ -1259,6 +1259,7 @@ static const struct adv7180_chip_info ad
static int init_device(struct adv7180_state *state)
{
int ret;
+ int i;
mutex_lock(&state->mutex);
@@ -1305,6 +1306,18 @@ static int init_device(struct adv7180_st
goto out_unlock;
}
+ /* Select first valid input */
+ for (i = 0; i < 32; i++) {
+ if (BIT(i) & state->chip_info->valid_input_mask) {
+ ret = state->chip_info->select_input(state, i);
+
+ if (ret == 0) {
+ state->input = i;
+ break;
+ }
+ }
+ }
+
out_unlock:
mutex_unlock(&state->mutex);
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