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Commit cda828ca authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Mark Brown
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ASoC: sh: fsi: cleanup suspend/resume 



Current FSI driver was using saved_xxx variable for suspend/resume.
OTOH, the start and stop of power/clock are controlled by
fsi_hw_startup/fsi_hw_shutdown in current FSI driver.
The all necessary registers value are set by fsi_hw_startup.

So, if fsi_hw_shutdown is called when "suspend" is generated,
and fsi_hw_startup is called at "resume",
the saved_xxx are not needed.

Signed-off-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: default avatarLiam Girdwood <lrg@ti.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 4c481253

sound/soc/sh/fsi.c

+42 −55
Original line number Diff line number Diff line
@@ -184,13 +184,6 @@ struct fsi_priv { 
	int spdif:1;



	long rate;



	/* for suspend/resume */

	u32 saved_do_fmt;

	u32 saved_di_fmt;

	u32 saved_ckg1;

	u32 saved_ckg2;

	u32 saved_out_sel;

};



struct fsi_core {
@@ -211,14 +204,6 @@ struct fsi_master { 
	struct fsi_core *core;

	struct sh_fsi_platform_info *info;

	spinlock_t lock;



	/* for suspend/resume */

	u32 saved_a_mclk;

	u32 saved_b_mclk;

	u32 saved_iemsk;

	u32 saved_imsk;

	u32 saved_clk_rst;

	u32 saved_soft_rst;

};



/*
@@ -388,6 +373,21 @@ static int fsi_sample2frame(struct fsi_priv *fsi, int samples) 
	return samples / fsi->chan_num;

}



static int fsi_stream_is_working(struct fsi_priv *fsi,

				  int is_play)

{

	struct fsi_stream *io = fsi_get_stream(fsi, is_play);

	struct fsi_master *master = fsi_get_master(fsi);

	unsigned long flags;

	int ret;



	spin_lock_irqsave(&master->lock, flags);

	ret = !!io->substream;

	spin_unlock_irqrestore(&master->lock, flags);



	return ret;

}



static void fsi_stream_push(struct fsi_priv *fsi,

			    int is_play,

			    struct snd_pcm_substream *substream)
@@ -666,7 +666,6 @@ static int fsi_set_master_clk(struct device *dev, struct fsi_priv *fsi, 
	}



	return ret;



}



#define fsi_port_start(f, i)	__fsi_port_clk_ctrl(f, i, 1)
@@ -675,14 +674,13 @@ static void __fsi_port_clk_ctrl(struct fsi_priv *fsi, int is_play, int enable) 
{

	struct fsi_master *master = fsi_get_master(fsi);

	u32 clk  = fsi_is_port_a(fsi) ? CRA  : CRB;

	int is_master = fsi_is_clk_master(fsi);



	if (enable)

		fsi_irq_enable(fsi, is_play);

	else

		fsi_irq_disable(fsi, is_play);



	if (is_master)

	if (fsi_is_clk_master(fsi))

		fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0);

}
@@ -1327,48 +1325,43 @@ static int fsi_remove(struct platform_device *pdev) 
}



static void __fsi_suspend(struct fsi_priv *fsi,

			  int is_play,

			  struct device *dev)

{

	fsi->saved_do_fmt	= fsi_reg_read(fsi, DO_FMT);

	fsi->saved_di_fmt	= fsi_reg_read(fsi, DI_FMT);

	fsi->saved_ckg1		= fsi_reg_read(fsi, CKG1);

	fsi->saved_ckg2		= fsi_reg_read(fsi, CKG2);

	fsi->saved_out_sel	= fsi_reg_read(fsi, OUT_SEL);

	if (!fsi_stream_is_working(fsi, is_play))

		return;



	if (fsi_is_clk_master(fsi))

		fsi_set_master_clk(dev, fsi, fsi->rate, 0);

	fsi_port_stop(fsi, is_play);

	fsi_hw_shutdown(fsi, is_play, dev);

}



static void __fsi_resume(struct fsi_priv *fsi,

			 int is_play,

			 struct device *dev)

{

	fsi_reg_write(fsi, DO_FMT,	fsi->saved_do_fmt);

	fsi_reg_write(fsi, DI_FMT,	fsi->saved_di_fmt);

	fsi_reg_write(fsi, CKG1,	fsi->saved_ckg1);

	fsi_reg_write(fsi, CKG2,	fsi->saved_ckg2);

	fsi_reg_write(fsi, OUT_SEL,	fsi->saved_out_sel);

	if (!fsi_stream_is_working(fsi, is_play))

		return;



	if (fsi_is_clk_master(fsi))

	fsi_hw_startup(fsi, is_play, dev);



	if (fsi_is_clk_master(fsi) && fsi->rate)

		fsi_set_master_clk(dev, fsi, fsi->rate, 1);



	fsi_port_start(fsi, is_play);



}



static int fsi_suspend(struct device *dev)

{

	struct fsi_master *master = dev_get_drvdata(dev);

	struct fsi_priv *fsia = &master->fsia;

	struct fsi_priv *fsib = &master->fsib;



	pm_runtime_get_sync(dev);

	__fsi_suspend(fsia, 1, dev);

	__fsi_suspend(fsia, 0, dev);



	__fsi_suspend(&master->fsia, dev);

	__fsi_suspend(&master->fsib, dev);



	master->saved_a_mclk	= fsi_core_read(master, a_mclk);

	master->saved_b_mclk	= fsi_core_read(master, b_mclk);

	master->saved_iemsk	= fsi_core_read(master, iemsk);

	master->saved_imsk	= fsi_core_read(master, imsk);

	master->saved_clk_rst	= fsi_master_read(master, CLK_RST);

	master->saved_soft_rst	= fsi_master_read(master, SOFT_RST);



	pm_runtime_put_sync(dev);

	__fsi_suspend(fsib, 1, dev);

	__fsi_suspend(fsib, 0, dev);



	return 0;

}
@@ -1376,20 +1369,14 @@ static int fsi_suspend(struct device *dev) 
static int fsi_resume(struct device *dev)

{

	struct fsi_master *master = dev_get_drvdata(dev);

	struct fsi_priv *fsia = &master->fsia;

	struct fsi_priv *fsib = &master->fsib;



	pm_runtime_get_sync(dev);



	fsi_master_mask_set(master, SOFT_RST, 0xffff, master->saved_soft_rst);

	fsi_master_mask_set(master, CLK_RST, 0xffff, master->saved_clk_rst);

	fsi_core_mask_set(master, a_mclk, 0xffff, master->saved_a_mclk);

	fsi_core_mask_set(master, b_mclk, 0xffff, master->saved_b_mclk);

	fsi_core_mask_set(master, iemsk, 0xffff, master->saved_iemsk);

	fsi_core_mask_set(master, imsk, 0xffff, master->saved_imsk);



	__fsi_resume(&master->fsia, dev);

	__fsi_resume(&master->fsib, dev);

	__fsi_resume(fsia, 1, dev);

	__fsi_resume(fsia, 0, dev);



	pm_runtime_put_sync(dev);

	__fsi_resume(fsib, 1, dev);

	__fsi_resume(fsib, 0, dev);



	return 0;

}