[media] au8522: rework setup of audio routing

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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>

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Devin Heitmueller 2017-04-19 20:13:46 -03:00 • committed by Mauro Carvalho Chehab

parent bb750c7b4c

commit 427de05cf2

1 changed files with 15 additions and 14 deletions

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drivers/media/dvb-frontends/au8522_decoder.c

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