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>

diff --git a/sound/soc/soc-dai.c b/sound/soc/soc-dai.c
index 4571599..cecbbed 100644 (file)
--- a/sound/soc/soc-dai.c
+++ b/sound/soc/soc-dai.c
@@ -400,28 +400,30 @@ void snd_soc_dai_link_set_capabilities(struct snd_soc_dai_link *dai_link)
        struct snd_soc_dai_link_component *codec;
        struct snd_soc_dai *dai;
        bool supported[SNDRV_PCM_STREAM_LAST + 1];
+       bool supported_cpu;
+       bool supported_codec;
        int direction;
        int i;
 
        for_each_pcm_streams(direction) {
-               supported[direction] = true;
+               supported_cpu = false;
+               supported_codec = false;
 
                for_each_link_cpus(dai_link, i, cpu) {
                        dai = snd_soc_find_dai(cpu);
-                       if (!dai || !snd_soc_dai_stream_valid(dai, direction)) {
-                               supported[direction] = false;
+                       if (dai && snd_soc_dai_stream_valid(dai, direction)) {
+                               supported_cpu = true;
                                break;
                        }
                }
-               if (!supported[direction])
-                       continue;
                for_each_link_codecs(dai_link, i, codec) {
                        dai = snd_soc_find_dai(codec);
-                       if (!dai || !snd_soc_dai_stream_valid(dai, direction)) {
-                               supported[direction] = false;
+                       if (dai && snd_soc_dai_stream_valid(dai, direction)) {
+                               supported_codec = true;
                                break;
                        }
                }
+               supported[direction] = supported_cpu && supported_codec;
        }
 
        dai_link->dpcm_playback = supported[SNDRV_PCM_STREAM_PLAYBACK];

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index c517064..74baf1f 100644 (file)
--- 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 */