diff mbox series

ALSA: hda: add dev_dbg log when driver is not selected

Message ID 20200902154239.1440537-1-kai.vehmanen@linux.intel.com
State New
Headers show
Series ALSA: hda: add dev_dbg log when driver is not selected | expand

Commit Message

Kai Vehmanen Sept. 2, 2020, 3:42 p.m. UTC 
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

On SKL+ Intel platforms, the driver selection is handled by the
snd_intel_dspcfg, and when the HDaudio legacy driver is not selected,
be it with the auto-selection or user preferences with a kernel
parameter, the probe aborts with no logs, only a -ENODEV return value.

Having no dmesg trace, even with dynamic debug enabled, makes support
more complicated than it needs to be, and even experienced users can
be fooled. A simple dev_dbg() trace solves this problem.

BugLink: https://github.com/thesofproject/linux/issues/2330
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
---
 sound/pci/hda/hda_intel.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Comments

Takashi Iwai Sept. 2, 2020, 5:32 p.m. UTC | #1 
On Wed, 02 Sep 2020 17:42:39 +0200,
Kai Vehmanen wrote:
> 
> From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> 
> On SKL+ Intel platforms, the driver selection is handled by the
> snd_intel_dspcfg, and when the HDaudio legacy driver is not selected,
> be it with the auto-selection or user preferences with a kernel
> parameter, the probe aborts with no logs, only a -ENODEV return value.
> 
> Having no dmesg trace, even with dynamic debug enabled, makes support
> more complicated than it needs to be, and even experienced users can
> be fooled. A simple dev_dbg() trace solves this problem.
> 
> BugLink: https://github.com/thesofproject/linux/issues/2330
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
> Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>

Applied now.  Thanks.


Takashi
diff mbox series

Patch

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 0f86e3765bb3..36a9dbc33aa0 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2127,9 +2127,10 @@  static int azx_probe(struct pci_dev *pci,
 	 */
 	if (dmic_detect) {
 		err = snd_intel_dsp_driver_probe(pci);
-		if (err != SND_INTEL_DSP_DRIVER_ANY &&
-		    err != SND_INTEL_DSP_DRIVER_LEGACY)
+		if (err != SND_INTEL_DSP_DRIVER_ANY && err != SND_INTEL_DSP_DRIVER_LEGACY) {
+			dev_dbg(&pci->dev, "HDAudio driver not selected, aborting probe\n");
 			return -ENODEV;
+		}
 	} else {
 		dev_warn(&pci->dev, "dmic_detect option is deprecated, pass snd-intel-dspcfg.dsp_driver=1 option instead\n");
 	}