ASoC: soc-core: disable route checks for legacy devices

v5.4 changes in soc-core tightened the checks on soc_dapm_add_routes,
which results in the ASoC card probe failing.

Introduce a flag to be set in machine drivers to prevent the probe
from stopping in case of incomplete topologies or missing routes. This
flag is for backwards compatibility only and shall not be used for
newer machine drivers.

Example with an HDaudio card with a bad topology:

[ 236.177898] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: Failed to
add route iDisp1_out -> direct -> iDisp1 Tx

[ 236.177902] skl_hda_dsp_generic skl_hda_dsp_generic:
snd_soc_bind_card: snd_soc_dapm_add_routes failed: -19

with the disable_route_checks set:

[ 64.031657] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: Failed to
add route iDisp1_out -> direct -> iDisp1 Tx

[ 64.031661] skl_hda_dsp_generic skl_hda_dsp_generic:
snd_soc_bind_card: disable_route_checks set, ignoring errors on
add_routes

Fixes: daa480bde6b3a9 ("ASoC: soc-core: tidyup for snd_soc_dapm_add_routes()")
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/20200309192744.18380-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 8a2266676b2dd2054e7e93903a31f9dfd57fa80e..efb8bad7b0fabb536184eece3d118b83e5514396 100644 (file)
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1058,6 +1058,7 @@ struct snd_soc_card {
        const struct snd_soc_dapm_route *of_dapm_routes;
        int num_of_dapm_routes;
        bool fully_routed;
+       bool disable_route_checks;
 
        /* lists of probed devices belonging to this card */
        struct list_head component_dev_list;

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 068d809c349a2fc05da5db90802207232b95681f..b17366bac846323e9eec03637839008e56b3fb8c 100644 (file)
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1256,8 +1256,18 @@ static int soc_probe_component(struct snd_soc_card *card,
        ret = snd_soc_dapm_add_routes(dapm,
                                      component->driver->dapm_routes,
                                      component->driver->num_dapm_routes);
-       if (ret < 0)
-               goto err_probe;
+       if (ret < 0) {
+               if (card->disable_route_checks) {
+                       dev_info(card->dev,
+                                "%s: disable_route_checks set, ignoring errors on add_routes\n",
+                                __func__);
+               } else {
+                       dev_err(card->dev,
+                               "%s: snd_soc_dapm_add_routes failed: %d\n",
+                               __func__, ret);
+                       goto err_probe;
+               }
+       }
 
        /* see for_each_card_components */
        list_add(&component->card_list, &card->component_dev_list);
@@ -1938,8 +1948,18 @@ static int snd_soc_bind_card(struct snd_soc_card *card)
 
        ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
                                      card->num_dapm_routes);
-       if (ret < 0)
-               goto probe_end;
+       if (ret < 0) {
+               if (card->disable_route_checks) {
+                       dev_info(card->dev,
+                                "%s: disable_route_checks set, ignoring errors on add_routes\n",
+                                __func__);
+               } else {
+                       dev_err(card->dev,
+                                "%s: snd_soc_dapm_add_routes failed: %d\n",
+                                __func__, ret);
+                       goto probe_end;
+               }
+       }
 
        ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
                                      card->num_of_dapm_routes);