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When configuring the CSI in imx7_csi_configure(), the CSICR18 is set through a read-modify-write cycle to avoid affecting fields whose usage isn't clear. The function then sets fields depending on whether the input is interlaced or progressive, and from the parallel input or the CSI-2 receiver. Those bits are only set and never cleared. For instance, when switching from a CSI-2 source to the parallel input, the BIT_DATA_FROM_MIPI will stay set. Fix this issue by first clearing all the fields we need to configure. Add BIT_CSI_HW_ENABLE to the set of fields being cleared, as the CSI needs to start in the disabled state. This allows dropping the call to imx7_csi_hw_disable() in imx7_csi_sw_reset(). Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.