target/linux/bcm27xx/patches-5.15/950-0791-drivers-staging-bcm2835-isp-Clear-LS-table-handle-in.patch

   1 From d0624b8de9fd26dafba82f6cad4a8cf828e8bfe9 Mon Sep 17 00:00:00 2001
   2 From: Naushir Patuck <naush@raspberrypi.com>
   3 Date: Tue, 22 Mar 2022 15:16:40 +0000
   4 Subject: [PATCH] drivers: staging: bcm2835-isp: Clear LS table handle
   5  in the firmware
   6
   7 When all nodes have stopped streaming, ensure the firmware has released its
   8 handle on the LS table dmabuf. This is done by passing a null handle in the
   9 LS params.
  10
  11 Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
  12 ---
  13  .../vc04_services/bcm2835-isp/bcm2835-v4l2-isp.c    | 13 +++++++++++++
  14  1 file changed, 13 insertions(+)
  15
  16 --- a/drivers/staging/vc04_services/bcm2835-isp/bcm2835-v4l2-isp.c
  17 +++ b/drivers/staging/vc04_services/bcm2835-isp/bcm2835-v4l2-isp.c
  18 @@ -655,6 +655,19 @@ static void bcm2835_isp_node_stop_stream
  19         atomic_dec(&dev->num_streaming);
  20         /* If all ports disabled, then disable the component */
  21         if (atomic_read(&dev->num_streaming) == 0) {
  22 +               struct bcm2835_isp_lens_shading ls;
  23 +               /*
  24 +                * The ISP component on the firmware has a reference to the
  25 +                * dmabuf handle for the lens shading table.  Pass a null handle
  26 +                * to remove that reference now.
  27 +                */
  28 +               memset(&ls, 0, sizeof(ls));
  29 +               /* Must set a valid grid size for the FW */
  30 +               ls.grid_cell_size = 16;
  31 +               set_isp_param(&dev->node[0],
  32 +                             MMAL_PARAMETER_LENS_SHADING_OVERRIDE,
  33 +                             &ls, sizeof(ls));
  34 +
  35                 ret = vchiq_mmal_component_disable(dev->mmal_instance,
  36                                                    dev->component);
  37                 if (ret) {