ASoC: fsl_sai: add error message in case of missing imx-pcm-dma support

If the imx-pcm-dma is required we need to have the module enabled. For
all NXP/FSL sound cards using the ASoC architecture this is the case but
in case of using the simple-audio-card sound card this isn't the case.

In such case the driver probe fails silently and the card isn't
available. It took a while to find the missing Kconfig. Make this easier
for others by printing a error if this the module isn't available but
required by the HW.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Link: https://lore.kernel.org/r/20220601092342.3328644-3-m.felsch@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index a7637d6..b65c9c7 100644 (file)
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -1163,8 +1163,11 @@ static int fsl_sai_probe(struct platform_device *pdev)
         */
        if (sai->soc_data->use_imx_pcm) {
                ret = imx_pcm_dma_init(pdev);
-               if (ret)
+               if (ret) {
+                       if (!IS_ENABLED(CONFIG_SND_SOC_IMX_PCM_DMA))
+                               dev_err(dev, "Error: You must enable the imx-pcm-dma support!\n");
                        goto err_pm_get_sync;
+               }
        } else {
                ret = devm_snd_dmaengine_pcm_register(dev, NULL, 0);
                if (ret)