On 2023-07-19 13:06, Takashi Iwai wrote:
On Wed, 19 Jul 2023 11:48:06 +0200,
Maarten Lankhorst wrote:
The 60 seconds timeout is a thing "better than complete disablement",
so it's not ideal, either. Maybe we can add something like the
following:
- Check when the deferred probe takes too long, and warn it
- Provide some runtime option to disable the component binding, so
that user can work around it if needed
A module option to snd_hdac_i915_init would probably be the least of all evils
here.
Yes, probably it's the easiest option and sufficient.
thanks,
Takashi
Hey,
Patch below, can be applied immediately iresspective of the other patches.
---->8----------
Selecting CONFIG_DRM selects CONFIG_VIDEO_NOMODESET, which exports
video_firmware_drivers_only(). This can be used as a first approximation
on whether i915 will be available. It's safe to use as this is only
built when CONFIG_SND_HDA_I915 is selected by CONFIG_I915.
It's not completely fool proof, as you can boot with "nomodeset
i915.modeset=1" to make i915 load regardless, or use
"i915.force_probe=!*" to never load i915, but the common case of booting
with nomodeset to disable all GPU drivers this will work as intended.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
---
diff --git a/sound/hda/hdac_i915.c b/sound/hda/hdac_i915.c
index 1637dc6e630a6..90bcf84f7b2ce 100644
--- a/sound/hda/hdac_i915.c
+++ b/sound/hda/hdac_i915.c
@@ -11,6 +11,8 @@
#include <sound/hda_i915.h>
#include <sound/hda_register.h>
+#include <video/nomodeset.h>
+
#define IS_HSW_CONTROLLER(pci) (((pci)->device == 0x0a0c) || \
((pci)->device == 0x0c0c) || \
((pci)->device == 0x0d0c) || \
@@ -122,6 +124,9 @@ static int i915_gfx_present(struct pci_dev *hdac_pci)
{
struct pci_dev *display_dev = NULL;
+ if (video_firmware_drivers_only())
+ return false;
+
for_each_pci_dev(display_dev) {
if (display_dev->vendor == PCI_VENDOR_ID_INTEL &&
(display_dev->class >> 16) == PCI_BASE_CLASS_DISPLAY &&
