target/linux/bcm27xx/patches-5.4/950-0157-media-adv7180-Default-to-the-first-valid-input.patch

   1 From b1d3f1c74057db79c45a11ed9ce0fc1e24d67401 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Wed, 31 Oct 2018 14:57:46 +0000
   4 Subject: [PATCH] media: adv7180: Default to the first valid input
   5
   6 The hardware default is differential CVBS on AIN1 & 2, which
   7 isn't very useful.
   8
   9 Select the first input that is defined as valid for the
  10 chip variant (typically CVBS_AIN1).
  11
  12 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  13 ---
  14  drivers/media/i2c/adv7180.c | 13 +++++++++++++
  15  1 file changed, 13 insertions(+)
  16
  17 --- a/drivers/media/i2c/adv7180.c
  18 +++ b/drivers/media/i2c/adv7180.c
  19 @@ -1246,6 +1246,7 @@ static const struct adv7180_chip_info ad
  20  static int init_device(struct adv7180_state *state)
  21  {
  22         int ret;
  23 +       int i;
  24
  25         mutex_lock(&state->mutex);
  26
  27 @@ -1292,6 +1293,18 @@ static int init_device(struct adv7180_st
  28                         goto out_unlock;
  29         }
  30
  31 +       /* Select first valid input */
  32 +       for (i = 0; i < 32; i++) {
  33 +               if (BIT(i) & state->chip_info->valid_input_mask) {
  34 +                       ret = state->chip_info->select_input(state, i);
  35 +
  36 +                       if (ret == 0) {
  37 +                               state->input = i;
  38 +                               break;
  39 +                       }
  40 +               }
  41 +       }
  42 +
  43  out_unlock:
  44         mutex_unlock(&state->mutex);
  45