On Wed, 11 Apr 2018, "Shi, Yang A" <yang.a....@intel.com> wrote: >>No, that's not true. Just as an example, dev_priv->cdclk.hw.cdclk >>hasn't been initialized. > i915_load_modeset_init->intel_power_domains_init_hw->bxt_display_core_init->bxt_init_cdclk > dev_priv->cdclk.hw.cdclk will be initialized here. > It happened before driver enter into intel_modeset_init. > So it should be safe to be used from audio driver.
Was it easy to figure that out? Imagine double checking everything whenever a) intel_audio.c gets changed, or b) anything in our probe that might impact intel_audio.c gets changed. It's untenable. Our probe ordering is what it is to manage the complexity of the driver. When everything is done, we expose the driver to the rest of the system. Same with sysfs, debugfs, etc. >>> Would you like to suggest a better place to do intel_audio_init? >> >>I think the call is already where it is supposed to be. We expose >>ourselves to the rest of the system when we are ready. If it takes >>long, it takes long. I think you have a race in your driver, and you >>need to deal with it properly in your driver. >> > No, display driver consume too much time to do initialization when it > don't connect any display Output device.It influence whole audio > driver and cause whole audio driver can't works well. This don't make > sense. Our probe takes as long as it takes. It's a complicated driver with complicated probing to do. Why does your design require i915 to be probed as part of your probe? The component interface supports the master and client binding in any order, asynchronously. If you have issues because of the timing, it's probably a race condition in your driver. Doing the audio init earlier on our side just papers over your race condition without actually fixing it. If we were to optimize our probe, it would probably mean more parallelism and asynchronous probing, and that in turn means even stricter requirements for finding the root cause instead of just fiddling with the call site. BR, Jani. -- Jani Nikula, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
