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@xxxxxx> Reviewed-by: Jyri Sarha <jsarha@xxxxxx> Acked-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx> --- drivers/gpu/drm/bridge/sii902x.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c index 962931c20efe..a323815aa9b6 100644 --- a/drivers/gpu/drm/bridge/sii902x.c +++ b/drivers/gpu/drm/bridge/sii902x.c @@ -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( -- 2.7.4 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel