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