diff options
author | Hans Verkuil <hans.verkuil@cisco.com> | 2014-11-03 05:42:09 -0500 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2014-11-03 11:43:26 -0500 |
commit | cba63cf8f92952211eb13376cda6c05679d675d2 (patch) | |
tree | 1e477b3d59b244dbabe8a5360f77485f635b0fc9 /Documentation/video4linux | |
parent | d358aefdc0cc92b16ced449f998dbad639db6809 (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.txt | 12 |
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 | ||
223 | multiplanar: select whether each device instance supports multi-planar formats, | 223 | multiplanar: 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 | |||
975 | 0 otherwise. | 974 | 0 otherwise. |
976 | 975 | ||
977 | The driver has to be configured to support the multiplanar formats. By default | 976 | The driver has to be configured to support the multiplanar formats. By default |
978 | the first driver instance is single-planar, the second is multi-planar, and it | 977 | the driver instances are single-planar. This can be changed by setting the |
979 | keeps alternating. This can be changed by setting the multiplanar module option, | 978 | multiplanar module option, see section 1 for more details on that option. |
980 | see section 1 for more details on that option. | ||
981 | 979 | ||
982 | If the driver instance is using the multiplanar formats/API, then the first | 980 | If the driver instance is using the multiplanar formats/API, then the first |
983 | single planar format (YUYV) and the multiplanar NV16M and NV61M formats the | 981 | single 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 | |||
1021 | to see the blended framebuffer overlay that's being written to by the second | 1019 | to see the blended framebuffer overlay that's being written to by the second |
1022 | instance. This setup would require the following commands: | 1020 | instance. 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 |