target/linux/bcm27xx/patches-5.15/950-0576-Pass-V4L2_CID_MPEG_VIDEO_H264_MIN_QP-MAX_QP-to-bcm28.patch

   1 From 3d21c93db479bf4269630676ba7d48dec9bf75fc Mon Sep 17 00:00:00 2001
   2 From: Maxim Devaev <mdevaev@gmail.com>
   3 Date: Wed, 17 Nov 2021 04:57:56 +0300
   4 Subject: [PATCH] Pass V4L2_CID_MPEG_VIDEO_H264_MIN_QP/MAX_QP to
   5  bcm2835-v4l2-codec
   6
   7 Following raspberrypi/linux#4704. This is necessary to set up
   8 quantization for variable bitrate to avoid video flickering.
   9 ---
  10  .../bcm2835-codec/bcm2835-v4l2-codec.c        | 32 ++++++++++++++++++-
  11  1 file changed, 31 insertions(+), 1 deletion(-)
  12
  13 --- a/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
  14 +++ b/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
  15 @@ -2187,6 +2187,28 @@ static int bcm2835_codec_s_ctrl(struct v
  16                 ret = bcm2835_codec_set_level_profile(ctx, ctrl);
  17                 break;
  18
  19 +       case V4L2_CID_MPEG_VIDEO_H264_MIN_QP:
  20 +               if (!ctx->component)
  21 +                       break;
  22 +
  23 +               ret = vchiq_mmal_port_parameter_set(ctx->dev->instance,
  24 +                                                   &ctx->component->output[0],
  25 +                                                   MMAL_PARAMETER_VIDEO_ENCODE_MIN_QUANT,
  26 +                                                   &ctrl->val,
  27 +                                                   sizeof(ctrl->val));
  28 +               break;
  29 +
  30 +       case V4L2_CID_MPEG_VIDEO_H264_MAX_QP:
  31 +               if (!ctx->component)
  32 +                       break;
  33 +
  34 +               ret = vchiq_mmal_port_parameter_set(ctx->dev->instance,
  35 +                                                   &ctx->component->output[0],
  36 +                                                   MMAL_PARAMETER_VIDEO_ENCODE_MAX_QUANT,
  37 +                                                   &ctrl->val,
  38 +                                                   sizeof(ctrl->val));
  39 +               break;
  40 +
  41         case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME: {
  42                 u32 mmal_bool = 1;
  43
  44 @@ -3103,7 +3125,7 @@ static int bcm2835_codec_open(struct fil
  45         case ENCODE:
  46         {
  47                 /* Encode controls */
  48 -               v4l2_ctrl_handler_init(hdl, 9);
  49 +               v4l2_ctrl_handler_init(hdl, 11);
  50
  51                 v4l2_ctrl_new_std_menu(hdl, &bcm2835_codec_ctrl_ops,
  52                                        V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
  53 @@ -3152,6 +3174,14 @@ static int bcm2835_codec_open(struct fil
  54                                          BIT(V4L2_MPEG_VIDEO_H264_PROFILE_HIGH)),
  55                                         V4L2_MPEG_VIDEO_H264_PROFILE_HIGH);
  56                 v4l2_ctrl_new_std(hdl, &bcm2835_codec_ctrl_ops,
  57 +                                 V4L2_CID_MPEG_VIDEO_H264_MIN_QP,
  58 +                                 0, 51,
  59 +                                 1, 20);
  60 +               v4l2_ctrl_new_std(hdl, &bcm2835_codec_ctrl_ops,
  61 +                                 V4L2_CID_MPEG_VIDEO_H264_MAX_QP,
  62 +                                 0, 51,
  63 +                                 1, 51);
  64 +               v4l2_ctrl_new_std(hdl, &bcm2835_codec_ctrl_ops,
  65                                   V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME,
  66                                   0, 0, 0, 0);
  67                 if (hdl->error) {