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* media: docs-rst: Clarify duration of LP-11 modeSteve Longerbeam2019-08-151-3/+7
| | | | | | | | | | | Add a sentence that makes it more clear when the CSI-2 transmitter must, if possible, exit LP-11 mode. That is, maintain LP-11 mode until stream on, at which point the transmitter activates the clock lane and transition to HS mode. Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
* media: v4l: Documentation: Serial busses use parallel mbus codesSakari Ailus2019-08-151-0/+7
| | | | | | | | | | | | | | | When the support for serial busses was introduced in V4L2, it was decided to use the existing parallel bus media bus pixel codes to describe them. While this was a practical choice at the time, it necessitates choosing which one of the many parallel mbus pixel codes to use, for on the serial busses these formats are effectively all equivalent. The practice has always been to use the pixel code that describes a bus that transfers a single sample per clock. Document this. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
* media: docs: brainless mass add SPDX headers to all media filesMauro Carvalho Chehab2018-12-051-0/+2
| | | | | | | | | All Documentation files outside the uAPI are all licensed with, at least, GPL 2.0. So, mark them as such. The ondes at media/uapi are at least GFDL 1.1+. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
* media: docs-rst: media: Document broken frame handling in stream stop for CSI-2Sakari Ailus2017-08-271-0/+10
| | | | | | | | | | Some CSI-2 transmitters will finish an ongoing frame whereas others will not. Document that receiver drivers should not assume a particular behaviour but to work in both cases. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
* [media] docs-rst: Make the CSI-2 bus initialisation documentation match realitySakari Ailus2017-04-171-4/+5
| | | | | | | | | | Update the CSI-2 bus documentation to tell that the LP-11 mode is not mandatory as there are transmitters that cannot be explicitly set to LP-11 mode. Instead, say that this what the transmitter drivers shall do if possible. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
* [media] doc-rst: v4l: Add documentation on CSI-2 bus configurationSakari Ailus2016-11-181-0/+61
Document the interface between the CSI-2 transmitter and receiver drivers. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>