target/linux/bcm27xx/patches-6.1/950-1160-media-i2c-ov7251-Switch-from-V4L2_CID_GAIN-to-V4L2_C.patch

   1 From e60fbc34aa98b3ba2c9338ad628fc8d8137e9065 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Tue, 14 Nov 2023 18:36:19 +0000
   4 Subject: [PATCH] media/i2c: ov7251: Switch from V4L2_CID_GAIN to
   5  V4L2_CID_ANALOGUE_GAIN
   6
   7 The mainline driver has implemented analogue gain using the control
   8 V4L2_CID_GAIN instead of V4L2_CID_ANALOGUE_GAIN.
   9
  10 libcamera requires V4L2_CID_ANALOGUE_GAIN, and therefore fails.
  11
  12 Update the driver to use V4L2_CID_ANALOGUE_GAIN.
  13
  14 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  15 ---
  16  drivers/media/i2c/ov7251.c | 4 ++--
  17  1 file changed, 2 insertions(+), 2 deletions(-)
  18
  19 --- a/drivers/media/i2c/ov7251.c
  20 +++ b/drivers/media/i2c/ov7251.c
  21 @@ -1063,7 +1063,7 @@ static int ov7251_s_ctrl(struct v4l2_ctr
  22         case V4L2_CID_EXPOSURE:
  23                 ret = ov7251_set_exposure(ov7251, ctrl->val);
  24                 break;
  25 -       case V4L2_CID_GAIN:
  26 +       case V4L2_CID_ANALOGUE_GAIN:
  27                 ret = ov7251_set_gain(ov7251, ctrl->val);
  28                 break;
  29         case V4L2_CID_TEST_PATTERN:
  30 @@ -1588,7 +1588,7 @@ static int ov7251_init_ctrls(struct ov72
  31         ov7251->exposure = v4l2_ctrl_new_std(&ov7251->ctrls, &ov7251_ctrl_ops,
  32                                              V4L2_CID_EXPOSURE, 1, 32, 1, 32);
  33         ov7251->gain = v4l2_ctrl_new_std(&ov7251->ctrls, &ov7251_ctrl_ops,
  34 -                                        V4L2_CID_GAIN, 16, 1023, 1, 16);
  35 +                                        V4L2_CID_ANALOGUE_GAIN, 16, 1023, 1, 16);
  36         v4l2_ctrl_new_std_menu_items(&ov7251->ctrls, &ov7251_ctrl_ops,
  37                                      V4L2_CID_TEST_PATTERN,
  38                                      ARRAY_SIZE(ov7251_test_pattern_menu) - 1,