From 90fa9a0f2b6dc209e22950a871a79343661e1d09 Mon Sep 17 00:00:00 2001
From: Benjamin Bara <benjamin.bara@skidata.com>
Date: Thu, 6 Jul 2023 13:41:11 +0200
Subject: libcamera: device_enumerator: ensure deviceNode is not empty
When activating both ISP nodes on the i.MX8MP, but only connecting one
camera sensor, libcamera aborts because it couldn't find the chosen
entity's device node:
[37:54:40.779902250] [3631] DEBUG DeviceEnumerator device_enumerator.cpp:252 Added device /dev/media1: rkisp1
[37:54:40.780196750] [3631] DEBUG DeviceEnumerator device_enumerator_udev.cpp:322 All dependencies for media device /dev/media0 found
[37:54:40.780237875] [3631] DEBUG DeviceEnumerator device_enumerator.cpp:252 Added device /dev/media0: rkisp1
[37:54:40.780505125] [3631] DEBUG Camera camera_manager.cpp:152 Found registered pipeline handler 'PipelineHandlerRkISP1'
[37:54:40.780599875] [3631] DEBUG DeviceEnumerator device_enumerator.cpp:312 Successful match for media device "rkisp1"
[37:54:40.780731375] [3631] ERROR V4L2 v4l2_device.cpp:93 'rkisp1_isp': Failed to open V4L2 device '': No such file or directory
Fix this by skipping empty device nodes:
[37:49:05.172672000] [3603] DEBUG DeviceEnumerator device_enumerator_udev.cpp:322 All dependencies for media device /dev/media1 found
[37:49:05.172720625] [3603] DEBUG DeviceEnumerator device_enumerator.cpp:256 Added device /dev/media1: rkisp1
[37:49:05.172973875] [3603] DEBUG DeviceEnumerator device_enumerator_udev.cpp:322 All dependencies for media device /dev/media0 found
[37:49:05.173012125] [3603] DEBUG DeviceEnumerator device_enumerator.cpp:256 Added device /dev/media0: rkisp1
[37:49:05.173281625] [3603] DEBUG Camera camera_manager.cpp:152 Found registered pipeline handler 'PipelineHandlerRkISP1'
[37:49:05.173376875] [3603] DEBUG DeviceEnumerator device_enumerator.cpp:107 Skip rkisp1_isp: no device node
[37:49:05.173414375] [3603] DEBUG DeviceEnumerator device_enumerator.cpp:316 Successful match for media device "rkisp1"
[37:49:05.173671250] [3603] DEBUG V4L2 v4l2_videodevice.cpp:632 /dev/video1[15:cap]: Opened device platform:rkisp1: rkisp1: rkisp1_stats
[37:49:05.173775125] [3603] DEBUG V4L2 v4l2_videodevice.cpp:632 /dev/video2[16:out]: Opened device platform:rkisp1: rkisp1: rkisp1_params
[37:49:05.173880500] [3603] DEBUG V4L2 v4l2_videodevice.cpp:632 /dev/video0[18:cap]: Opened device platform:rkisp1: rkisp1: rkisp1
Signed-off-by: Benjamin Bara <benjamin.bara@skidata.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
src/libcamera/device_enumerator.cpp | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/src/libcamera/device_enumerator.cpp b/src/libcamera/device_enumerator.cpp
index f2e055de..42b5ba6c 100644
--- a/src/libcamera/device_enumerator.cpp
+++ b/src/libcamera/device_enumerator.cpp
@@ -101,8 +101,14 @@ bool DeviceMatch::match(const MediaDevice *device) const
for (const MediaEntity *entity : device->entities()) {
if (name == entity->name()) {
- found = true;
- break;
+ if (!entity->deviceNode().empty()) {
+ found = true;
+ break;
+ } else {
+ LOG(DeviceEnumerator, Debug)
+ << "Skip " << entity->name()
+ << ": no device node";
+ }
}
}
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