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ASoC: davinci-mcasp: Validate tdm_slots parameter at probe time 

Instead of validating the tdm_slots parameter every time at hw_params we
can do it once during probe. If the parameter is not valid (<2 or >32)
print an error and fix it up.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2014-11-10 12:32:15 +02:00 committed by Mark Brown
parent bb372af0f7
commit 1a5923da4e
1 changed files with 18 additions and 10 deletions
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28
sound/soc/davinci/davinci-mcasp.c
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@ -632,13 +632,7 @@ static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream)
u32 mask = 0;
u32 busel = 0;
if ((mcasp->tdm_slots < 2) || (mcasp->tdm_slots > 32)) {
dev_err(mcasp->dev, "tdm slot %d not supported\n",
mcasp->tdm_slots);
return -EINVAL;
}
active_slots = (mcasp->tdm_slots > 31) ? 32 : mcasp->tdm_slots;
active_slots = mcasp->tdm_slots;
for (i = 0; i < active_slots; i++)
mask |= (1 << i);
@ -650,12 +644,12 @@ static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream)
mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
FSXMOD(mcasp->tdm_slots), FSXMOD(0x1FF));
FSXMOD(active_slots), FSXMOD(0x1FF));
mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
FSRMOD(mcasp->tdm_slots), FSRMOD(0x1FF));
FSRMOD(active_slots), FSRMOD(0x1FF));
return 0;
}
@ -1237,7 +1231,21 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
}
mcasp->op_mode = pdata->op_mode;
mcasp->tdm_slots = pdata->tdm_slots;
/* sanity check for tdm slots parameter */
if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) {
if (pdata->tdm_slots < 2) {
dev_err(&pdev->dev, "invalid tdm slots: %d\n",
pdata->tdm_slots);
mcasp->tdm_slots = 2;
} else if (pdata->tdm_slots > 32) {
dev_err(&pdev->dev, "invalid tdm slots: %d\n",
pdata->tdm_slots);
mcasp->tdm_slots = 32;
} else {
mcasp->tdm_slots = pdata->tdm_slots;
}
}
mcasp->num_serializer = pdata->num_serializer;
#ifdef CONFIG_PM_SLEEP
mcasp->context.xrsr_regs = devm_kzalloc(&pdev->dev,