ASoC: core: use less strict tests for dailink capabilities

Previous updates to set dailink capabilities and check dailink
capabilities were based on a flawed assumption that all dais support
the same capabilities as the dailink. This is true for TDM
configurations but existing configurations use an amplifier and a
capture device on the same dailink, and the tests would prevent the
card from probing.

This patch modifies the snd_soc_dai_link_set_capabilities()
helper so that the dpcm_playback (resp. dpcm_capture) dailink
capabilities are set if at least one dai supports playback (resp. capture).

Likewise the checks are modified so that an error is reported only
when dpcm_playback (resp. dpcm_capture) is set but none of the CPU
DAIs support playback (resp. capture).

Fixes: 25612477d20b5 ('ASoC: soc-dai: set dai_link dpcm_ flags with a helper')
Fixes: b73287f0b0745 ('ASoC: soc-pcm: dpcm: fix playback/capture checks')
Suggested-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200723180533.220312-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 24 insertions, 18 deletions

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index c517064f5391..74baf1fce053 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -2802,30 +2802,36 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 		if (rtd->dai_link->dpcm_playback) {
 			stream = SNDRV_PCM_STREAM_PLAYBACK;
 
-			for_each_rtd_cpu_dais(rtd, i, cpu_dai)
-				if (!snd_soc_dai_stream_valid(cpu_dai,
-							      stream)) {
-					dev_err(rtd->card->dev,
-						"CPU DAI %s for rtd %s does not support playback\n",
-						cpu_dai->name,
-						rtd->dai_link->stream_name);
-					return -EINVAL;
+			for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
+				if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
+					playback = 1;
+					break;
 				}
-			playback = 1;
+			}
+
+			if (!playback) {
+				dev_err(rtd->card->dev,
+					"No CPU DAIs support playback for stream %s\n",
+					rtd->dai_link->stream_name);
+				return -EINVAL;
+			}
 		}
 		if (rtd->dai_link->dpcm_capture) {
 			stream = SNDRV_PCM_STREAM_CAPTURE;
 
-			for_each_rtd_cpu_dais(rtd, i, cpu_dai)
-				if (!snd_soc_dai_stream_valid(cpu_dai,
-							      stream)) {
-					dev_err(rtd->card->dev,
-						"CPU DAI %s for rtd %s does not support capture\n",
-						cpu_dai->name,
-						rtd->dai_link->stream_name);
-					return -EINVAL;
+			for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
+				if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
+					capture = 1;
+					break;
 				}
-			capture = 1;
+			}
+
+			if (!capture) {
+				dev_err(rtd->card->dev,
+					"No CPU DAIs support capture for stream %s\n",
+					rtd->dai_link->stream_name);
+				return -EINVAL;
+			}
 		}
 	} else {
 		/* Adapt stream for codec2codec links */