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The patches were generated from the RPi repo with the following command: git format-patch v6.6.58..rpi-6.6.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
36 lines
1.4 KiB
Diff
36 lines
1.4 KiB
Diff
From 8c9ca647449ba9df7e3b300c480242f9b5bdd867 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Tue, 10 Sep 2024 16:58:56 +0100
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Subject: [PATCH 1265/1350] vc04_services: codec: Allocate the max number of
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buffers on the VPU
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The VPU's API can't match the use of VIDIOC_CREATE_BUFS to add buffers
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to the internal pool whilst a port is enabled, therefore allocate
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the maximum number of buffers possible in V4L2 to avoid the issue.
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As these are only buffer headers, the overhead is relatively small.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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.../vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c | 10 ++++++++--
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1 file changed, 8 insertions(+), 2 deletions(-)
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--- a/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
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+++ b/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
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@@ -2871,8 +2871,14 @@ static int bcm2835_codec_queue_setup(str
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if (*nbuffers < port->minimum_buffer.num)
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*nbuffers = port->minimum_buffer.num;
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- /* Add one buffer to take an EOS */
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- port->current_buffer.num = *nbuffers + 1;
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+
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+ /*
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+ * The VPU uses this number to allocate a pool of headers at port_enable.
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+ * We can't increase it later, so use of CREATE_BUFS is going to result
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+ * in bad things happening. Adopt worst-case allocation, and add one
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+ * buffer to take an EOS
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+ */
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+ port->current_buffer.num = VB2_MAX_FRAME + 1;
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return 0;
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}
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