tree 2e2cab5de16f726dad51a6c56b3e4d68473049f1
parent bb750c7b4cecd6c9d12f41cb71e301141bad8835
author Devin Heitmueller <dheitmueller@kernellabs.com> 1492643626 -0300
committer Mauro Carvalho Chehab <mchehab@s-opensource.com> 1496746060 -0300

[media] au8522: rework setup of audio routing

The original code was based on my reverse engineering of an I2C trace
of the Windows driver.  Now that I know what the registers actually do,
restructure the code a bit, removing some unneeded register programming
and fixing the sequencing of operations.

This reduces the time it takes to change inputs from 1300ms down to
600ms (as measured by "time v4l2-ctl -i 0")

Note this does not address outstanding issues related to the management
of the module clocks and power control for the various blocks, which
will be done in a separate patch.

Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>