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MLK-15071: ASoC: fsl: imx-ak4497: Fix clk for 384KHz and 786KHz

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With the current multipliers SAI isn't able to derive a correct bitclk.

e.g: When playing at 786Khz with current multiplier

MCLK = 22579200, requested freq 22579200 but SAI wants:
MCLK = (DIV + 1) * 2 * freq [SAI TCR2], so an acceptable solution
is to add a 2x factor to mclk.

Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
This commit is contained in:
Viorel Suman 2018-02-12 12:35:19 +02:00 committed by Jason Liu
parent 1165041e06
commit 94b4ed3160
2 changed files with 4 additions and 3 deletions
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3
sound/soc/codecs/ak4497.c
View file

@ -544,16 +544,17 @@ static int ak4497_hw_params(struct snd_pcm_substream *substream,
dfs |= AK4497_DFS_96KHZ;
dfs2 |= AK4497_DFS2_48KHZ;
break;
case 176400:
case 192000:
dfs |= AK4497_DFS_192KHZ;
dfs2 |= AK4497_DFS2_48KHZ;
break;
case 352800:
case 384000:
dfs |= AK4497_DFS_384KHZ;
dfs2 |= AK4497_DFS2_384KHZ;
break;
case 705600:
case 768000:
dfs |= AK4497_DFS_768KHZ;
dfs2 |= AK4497_DFS2_384KHZ;

4
sound/soc/fsl/imx-ak4497.c
View file

@ -45,8 +45,8 @@ static const struct imx_ak4497_fs_mul {
{ .min = 44100, .max = 48000, .mul = 512 }, /* Normal */
{ .min = 88200, .max = 96000, .mul = 256 }, /* Double */
{ .min = 176400, .max = 192000, .mul = 128 }, /* Quad */
{ .min = 384000, .max = 384000, .mul = 64 }, /* Oct */
{ .min = 768000, .max = 768000, .mul = 32 }, /* Hex */
{ .min = 352800, .max = 384000, .mul = 2*64 }, /* Oct */
{ .min = 705600, .max = 768000, .mul = 2*32 }, /* Hex */
};
static bool imx_ak4497_is_dsd(struct snd_pcm_hw_params *params)