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authorHans Verkuil <hans.verkuil@cisco.com>2014-11-03 05:42:09 -0500
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2014-11-03 11:43:26 -0500
commitcba63cf8f92952211eb13376cda6c05679d675d2 (patch)
tree1e477b3d59b244dbabe8a5360f77485f635b0fc9 /Documentation/video4linux
parentd358aefdc0cc92b16ced449f998dbad639db6809 (diff)
[media] vivid: default to single planar device instances
The default used to be that the first vivid device instance was single planar, the second multi planar, the third single planar, etc. However, that turned out to be unexpected and awkward. Change the driver to always default to single planar. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'Documentation/video4linux')
-rw-r--r--Documentation/video4linux/vivid.txt12
1 files changed, 5 insertions, 7 deletions
diff --git a/Documentation/video4linux/vivid.txt b/Documentation/video4linux/vivid.txt
index eeb11a28e4fc..e5a940e3d304 100644
--- a/Documentation/video4linux/vivid.txt
+++ b/Documentation/video4linux/vivid.txt
@@ -221,12 +221,11 @@ ccs_out_mode: specify the allowed video output crop/compose/scaling combination
221 key, not quality. 221 key, not quality.
222 222
223multiplanar: select whether each device instance supports multi-planar formats, 223multiplanar: select whether each device instance supports multi-planar formats,
224 and thus the V4L2 multi-planar API. By default the first device instance 224 and thus the V4L2 multi-planar API. By default device instances are
225 is single-planar, the second multi-planar, and it keeps alternating. 225 single-planar.
226 226
227 This module option can override that for each instance. Values are: 227 This module option can override that for each instance. Values are:
228 228
229 0: use alternating single and multi-planar devices.
230 1: this is a single-planar instance. 229 1: this is a single-planar instance.
231 2: this is a multi-planar instance. 230 2: this is a multi-planar instance.
232 231
@@ -975,9 +974,8 @@ is set, then the alpha component is only used for the color red and set to
9750 otherwise. 9740 otherwise.
976 975
977The driver has to be configured to support the multiplanar formats. By default 976The driver has to be configured to support the multiplanar formats. By default
978the first driver instance is single-planar, the second is multi-planar, and it 977the driver instances are single-planar. This can be changed by setting the
979keeps alternating. This can be changed by setting the multiplanar module option, 978multiplanar module option, see section 1 for more details on that option.
980see section 1 for more details on that option.
981 979
982If the driver instance is using the multiplanar formats/API, then the first 980If the driver instance is using the multiplanar formats/API, then the first
983single planar format (YUYV) and the multiplanar NV16M and NV61M formats the 981single planar format (YUYV) and the multiplanar NV16M and NV61M formats the
@@ -1021,7 +1019,7 @@ the output overlay for the video output, turn on video looping and capture
1021to see the blended framebuffer overlay that's being written to by the second 1019to see the blended framebuffer overlay that's being written to by the second
1022instance. This setup would require the following commands: 1020instance. This setup would require the following commands:
1023 1021
1024 $ sudo modprobe vivid n_devs=2 node_types=0x10101,0x1 multiplanar=1,1 1022 $ sudo modprobe vivid n_devs=2 node_types=0x10101,0x1
1025 $ v4l2-ctl -d1 --find-fb 1023 $ v4l2-ctl -d1 --find-fb
1026 /dev/fb1 is the framebuffer associated with base address 0x12800000 1024 /dev/fb1 is the framebuffer associated with base address 0x12800000
1027 $ sudo v4l2-ctl -d2 --set-fbuf fb=1 1025 $ sudo v4l2-ctl -d2 --set-fbuf fb=1