ASoC: intel/skl/hda - fix probe regression on systems without i915

Starting in commit cbc7a6b5a87a ("ASoC: soc-card: add
snd_soc_card_add_dai_link()"), error value from ASoc add_dai_link() is
no longer ignored.

The generic HDA machine driver relied on the old semantics to disable
i915 HDMI/DP audio codec at runtime. If no display codec was present,
add_dai_link() returned an error, but this was ignored and rest of the
card was successfully probed.

Fix the problem by changing the machine driver add_dai_link() to not
return an error in this case.

Fixes: cbc7a6b5a87a ("ASoC: soc-card: add snd_soc_card_add_dai_link()")
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
BugLink: https://github.com/thesofproject/linux/issues/2261
Link: https://lore.kernel.org/r/20200714132804.3638221-1-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/intel/boards/skl_hda_dsp_common.h b/sound/soc/intel/boards/skl_hda_dsp_common.h
index 507750e..4b0b395 100644 (file)
--- a/sound/soc/intel/boards/skl_hda_dsp_common.h
+++ b/sound/soc/intel/boards/skl_hda_dsp_common.h
@@ -33,6 +33,7 @@ struct skl_hda_private {
        int dai_index;
        const char *platform_name;
        bool common_hdmi_codec_drv;
+       bool idisp_codec;
 };
 
 extern struct snd_soc_dai_link skl_hda_be_dai_links[HDA_DSP_MAX_BE_DAI_LINKS];

diff --git a/sound/soc/intel/boards/skl_hda_dsp_generic.c b/sound/soc/intel/boards/skl_hda_dsp_generic.c
index 79c8947..ca49000 100644 (file)
--- a/sound/soc/intel/boards/skl_hda_dsp_generic.c
+++ b/sound/soc/intel/boards/skl_hda_dsp_generic.c
@@ -79,6 +79,9 @@ skl_hda_add_dai_link(struct snd_soc_card *card, struct snd_soc_dai_link *link)
        link->platforms->name = ctx->platform_name;
        link->nonatomic = 1;
 
+       if (!ctx->idisp_codec)
+               return 0;
+
        if (strstr(link->name, "HDMI")) {
                ret = skl_hda_hdmi_add_pcm(card, ctx->pcm_count);
 
@@ -118,19 +121,20 @@ static char hda_soc_components[30];
 static int skl_hda_fill_card_info(struct snd_soc_acpi_mach_params *mach_params)
 {
        struct snd_soc_card *card = &hda_soc_card;
+       struct skl_hda_private *ctx = snd_soc_card_get_drvdata(card);
        struct snd_soc_dai_link *dai_link;
-       u32 codec_count, codec_mask, idisp_mask;
+       u32 codec_count, codec_mask;
        int i, num_links, num_route;
 
        codec_mask = mach_params->codec_mask;
        codec_count = hweight_long(codec_mask);
-       idisp_mask = codec_mask & IDISP_CODEC_MASK;
+       ctx->idisp_codec = !!(codec_mask & IDISP_CODEC_MASK);
 
        if (!codec_count || codec_count > 2 ||
-           (codec_count == 2 && !idisp_mask))
+           (codec_count == 2 && !ctx->idisp_codec))
                return -EINVAL;
 
-       if (codec_mask == idisp_mask) {
+       if (codec_mask == IDISP_CODEC_MASK) {
                /* topology with iDisp as the only HDA codec */
                num_links = IDISP_DAI_COUNT + DMIC_DAI_COUNT;
                num_route = IDISP_ROUTE_COUNT;
@@ -152,7 +156,7 @@ static int skl_hda_fill_card_info(struct snd_soc_acpi_mach_params *mach_params)
                num_route = ARRAY_SIZE(skl_hda_map);
                card->dapm_widgets = skl_hda_widgets;
                card->num_dapm_widgets = ARRAY_SIZE(skl_hda_widgets);
-               if (!idisp_mask) {
+               if (!ctx->idisp_codec) {
                        for (i = 0; i < IDISP_DAI_COUNT; i++) {
                                skl_hda_be_dai_links[i].codecs = dummy_codec;
                                skl_hda_be_dai_links[i].num_codecs =
@@ -211,6 +215,8 @@ static int skl_hda_audio_probe(struct platform_device *pdev)
        if (!mach)
                return -EINVAL;
 
+       snd_soc_card_set_drvdata(&hda_soc_card, ctx);
+
        ret = skl_hda_fill_card_info(&mach->mach_params);
        if (ret < 0) {
                dev_err(&pdev->dev, "Unsupported HDAudio/iDisp configuration found\n");
@@ -223,7 +229,6 @@ static int skl_hda_audio_probe(struct platform_device *pdev)
        ctx->common_hdmi_codec_drv = mach->mach_params.common_hdmi_codec_drv;
 
        hda_soc_card.dev = &pdev->dev;
-       snd_soc_card_set_drvdata(&hda_soc_card, ctx);
 
        if (mach->mach_params.dmic_num > 0) {
                snprintf(hda_soc_components, sizeof(hda_soc_components),