ASoC: rl6231: Add new supports on rl6231

Add pll preset maps for Realtek codecs' PLL2 freq conversions.

Signed-off-by: derek.fang <derek.fang@realtek.com>
Link: https://lore.kernel.org/r/1591938925-1070-2-git-send-email-derek.fang@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: rl6231: Modify the target DMIC clock rate

Some DMIC components will not work correctly in the clock rate 3.072MHz.
We recommend the clock rate 1.536MHz in the gerenal case.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Link: https://lore.kernel.org/r/20200604071016.3981-1-oder_chiou@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: rl6231: Add the K bypass for the PLL parameters

The patch adds the K bypass for the PLL parameters.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Link: https://lore.kernel.org/r/20200504074007.13002-2-oder_chiou@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: rl6231: Add new supports on rl6231

1. Increases the max limit of PLL input frequency
on RL6231 shared support.
2. Add a new pll preset map.

Signed-off-by: Derek Fang <derek.fang@realtek.com>
Link: https://lore.kernel.org/r/1580970133-14089-1-git-send-email-derek.fang@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

Based on 2 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

ASoC: rl6231: remove never matched if condition

(in_t < 0) will never be true since in_t is unsigned.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: rl6231: get better PLL parameters

For those which can only get approximation PLL out cases, this patch
will use higher resolution to get a better PLL parameter.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: rl6231: make arrays div and pd static const, reduces object code size

Don't populate the read-only arrays div and pd on the stack,
instead make them static const. Makes the object code smaller by 210 bytes:

Before:
text data bss dec hex filename
2869 720 0 3589 e05 sound/soc/codecs/rl6231.o

After:
text data bss dec hex filename
2495 880 0 3375 d2f sound/soc/codecs/rl6231.o

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: rl6231: add 19.2M to 4.096M pll preset table

Add a pll mapping table for 19.2M in and 4.096M out.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: rl6231: fix range of DMIC clock

The maximum DMIC clock rate is 3.072 MHz for most DMIC. And it will get better
performance in higher clock rate. If we set maximum to 3 MHz in driver, we will
get a clock rate which is not even close to 3 MHz.
For example, if DMIC clock source is 24.576 MHz, the DMIC clock will be about
1.5 MHz in current code. But it will be 3.072 MHz with this patch.

Signed-off-by: John Lin <john.lin@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: rl6231: avoid using divisible by 3 for DMIC clk

Few codecs will meet no DMIC clock output issue when select a divided
number which is divisible by 3. To prevent this issue, the patch ignore
the numbers when calculating the DMIC clock divider.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: rl6231: Simplify DMIC divider calculation expression

Existing implementation checks all divider values and tracks
'red' proximity value for the frequency.

But as divider array is monotonically increasing the first
divider that gives DMIC rate in 3MHz range is the best one
we should use. No need for 'red' zone tracking.

Additionally make sure that DMIC frequency is higher 1MHz.

Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Acked-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: Add function "rl6231_get_pre_div" to correct the dmic clock calculation

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: rl6231: add pll preset table

Currently, rl6231_pll_calc provide a working PLL parameters for
given freq_in and freq_out. However, in some cases it is not the
perfect parameter. For example if freq_in = 19200000 and freq_out
= 24576000, the calculated parameter will gengrate 24.5647 MHz
which is not exactly the same as what we need. But the PLL can
output 24.576 MHz as exactly what we expect if we set the best
PLL parameter.
To improve it, we put the best match parameters in a preset table.
We can search the preset table first, if there is no preset parameter
for the given freq_in and freq_out, we can still calculate a working
PLL parameter.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: rl6231: Remove unneeded inclusion of header files

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Tested-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

ASoC: rt5640: Add the function "get_clk_info" to RL6231 shared support

The patch adds the function "get_clk_info" to RL6231 shared support.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

ASoC: rt5640: Add the function of the PLL clock calculation to RL6231 shared support

The patch adds the function of the PLL clock calculation to RL6231 shared
support.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

ASoC: rt5640: Add RL6231 class device shared support for RT5640, RT5645 and RT5651

The patch adds the RL6231 class device shared support for RT5640, RT5645 and
RT5651. The function of the DMIC clock calculation can be shared by RL6231
shared support.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@linaro.org>