diff options
| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2016-12-16 10:55:49 -0600 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-12-19 13:30:16 +0000 |
| commit | 4a8b3a682be9addff7dbd16371fa8c34103b5c31 (patch) | |
| tree | c9cf42719006f29676e87475a74720ef16c1b090 /sound | |
| parent | a5de5b74a50113564a1e0850e2da96c37c35e55d (diff) | |
| download | linux-4a8b3a682be9addff7dbd16371fa8c34103b5c31.tar.gz linux-4a8b3a682be9addff7dbd16371fa8c34103b5c31.tar.xz | |
ASoC: Intel: bytcr_rt5640: fallback mechanism if MCLK is not enabled
Commit df1a2776a795 ("ASoC: Intel: bytcr_rt5640: add MCLK support")
was merged but the corresponding clock framework patches have not,
after being bumped from audio to clock to x86 domains. The missing
clock-related patches result in a regression starting with 4.9 with
the audio card not being created.
Rather than reverting this commit and all following updates already
queued up for 4.10, handle run-time dependency on MCLK and fall back
to the previous bit-clock mode. This provides the same functionality
as in 4.8 for Baytrail devices. On Baytrail-CR most devices remain
silent with this fallback but additional patches are needed anyway.
As suggested by Mark Brown, the fallback is only allowed with -ENOENT,
all other run-time errors, including -EPROBE_DEFER, will stop the probe
with no sound card registered.
This patch should be applied to -stable as well as ASoC 4.10 fixes
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/intel/boards/bytcr_rt5640.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/sound/soc/intel/boards/bytcr_rt5640.c b/sound/soc/intel/boards/bytcr_rt5640.c index 507a86a5eafe..e33e4777a65c 100644 --- a/sound/soc/intel/boards/bytcr_rt5640.c +++ b/sound/soc/intel/boards/bytcr_rt5640.c @@ -825,10 +825,20 @@ static int snd_byt_rt5640_mc_probe(struct platform_device *pdev) if ((byt_rt5640_quirk & BYT_RT5640_MCLK_EN) && (is_valleyview())) { priv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3"); if (IS_ERR(priv->mclk)) { + ret_val = PTR_ERR(priv->mclk); + dev_err(&pdev->dev, - "Failed to get MCLK from pmc_plt_clk_3: %ld\n", - PTR_ERR(priv->mclk)); - return PTR_ERR(priv->mclk); + "Failed to get MCLK from pmc_plt_clk_3: %d\n", + ret_val); + + /* + * Fall back to bit clock usage for -ENOENT (clock not + * available likely due to missing dependencies), bail + * for all other errors, including -EPROBE_DEFER + */ + if (ret_val != -ENOENT) + return ret_val; + byt_rt5640_quirk &= ~BYT_RT5640_MCLK_EN; } } |