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drm/bridge: sii902x: make audio mclk optional

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The master clock on i2s bus is not mandatory,
as sii902X internal PLL can be used instead.
Make use of mclk optional.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Reviewed-by: Jyri Sarha <jsarha@ti.com>
Acked-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1563811560-29589-4-git-send-email-olivier.moysan@st.com
This commit is contained in:
Olivier Moysan 2019-07-22 18:06:00 +02:00 committed by Benjamin Gaignard
parent 512ec50a97
commit 6b72c7a98b
1 changed files with 10 additions and 9 deletions
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19
drivers/gpu/drm/bridge/sii902x.c
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@ -568,13 +568,14 @@ static int sii902x_audio_hw_params(struct device *dev, void *data,
return ret;
}
mclk_rate = clk_get_rate(sii902x->audio.mclk);
ret = sii902x_select_mclk_div(&i2s_config_reg, params->sample_rate,
mclk_rate);
if (mclk_rate != ret * params->sample_rate)
dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n",
mclk_rate, ret, params->sample_rate);
if (sii902x->audio.mclk) {
mclk_rate = clk_get_rate(sii902x->audio.mclk);
ret = sii902x_select_mclk_div(&i2s_config_reg,
params->sample_rate, mclk_rate);
if (mclk_rate != ret * params->sample_rate)
dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n",
mclk_rate, ret, params->sample_rate);
}
mutex_lock(&sii902x->mutex);
@ -751,11 +752,11 @@ static int sii902x_audio_codec_init(struct sii902x *sii902x,
sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] |
i2s_lane_id[lanes[i]] | SII902X_TPI_I2S_FIFO_ENABLE;
sii902x->audio.mclk = devm_clk_get(dev, "mclk");
sii902x->audio.mclk = devm_clk_get_optional(dev, "mclk");
if (IS_ERR(sii902x->audio.mclk)) {
dev_err(dev, "%s: No clock (audio mclk) found: %ld\n",
__func__, PTR_ERR(sii902x->audio.mclk));
return 0;
return PTR_ERR(sii902x->audio.mclk);
}
sii902x->audio.pdev = platform_device_register_data(