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| /openbmc/linux/sound/soc/codecs/ |
| H A D | rt5670.c | 485372dc Mon Mar 09 03:55:23 CDT 2015 Bard Liao <bardliao@realtek.com> ASoC: rt5670: Check sysclk source by private data
Currently, is_sys_clk_from_pll check sysclk source by reading codec
register value. And it will be invoked before updating dapm widget
power. In some machine driver, snd_soc_dai_set_sysclk is called in
dapm event to switch codec sysclk to RC clock in idle mode. And in
some use cases (such as syspend/resume) hw_params will not be called
when the dapm widget is powered up. As a result, is_sys_clk_from_pll
will return 0 although it is supposed to be 1.
To solve this, we let is_sys_clk_from_pll check sysclk sysclk_src
which is stored in private data and don't change the value of sysclk_src
when codec sysclk is switched to internal clock. The internal clock
can only be used in idle mode, so it sould be fine if we don't set
sysclk_src to internal clock.
Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
485372dc Mon Mar 09 03:55:23 CDT 2015 Bard Liao <bardliao@realtek.com> ASoC: rt5670: Check sysclk source by private data
Currently, is_sys_clk_from_pll check sysclk source by reading codec
register value. And it will be invoked before updating dapm widget
power. In some machine driver, snd_soc_dai_set_sysclk is called in
dapm event to switch codec sysclk to RC clock in idle mode. And in
some use cases (such as syspend/resume) hw_params will not be called
when the dapm widget is powered up. As a result, is_sys_clk_from_pll
will return 0 although it is supposed to be 1.
To solve this, we let is_sys_clk_from_pll check sysclk sysclk_src
which is stored in private data and don't change the value of sysclk_src
when codec sysclk is switched to internal clock. The internal clock
can only be used in idle mode, so it sould be fine if we don't set
sysclk_src to internal clock.
Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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