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drm/i915: don't try to load GuC fw on pre-gen9

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This avoids some bad register writes and generally feels more correct
than unconditionally trying to redirect interrupts and such.

References: https://bugs.freedesktop.org/show_bug.cgi?id=91777
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jesse Barnes 2015-09-10 14:55:00 -07:00 committed by Daniel Vetter
parent 6ff8ab0d0f
commit 87bcdd2e27
1 changed files with 16 additions and 13 deletions
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29
drivers/gpu/drm/i915/i915_gem.c
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@ -4687,19 +4687,22 @@ i915_gem_init_hw(struct drm_device *dev)
}
/* We can't enable contexts until all firmware is loaded */
ret = intel_guc_ucode_load(dev);
if (ret) {
/*
* If we got an error and GuC submission is enabled, map
* the error to -EIO so the GPU will be declared wedged.
* OTOH, if we didn't intend to use the GuC anyway, just
* discard the error and carry on.
*/
DRM_ERROR("Failed to initialize GuC, error %d%s\n", ret,
i915.enable_guc_submission ? "" : " (ignored)");
ret = i915.enable_guc_submission ? -EIO : 0;
if (ret)
goto out;
if (HAS_GUC_UCODE(dev)) {
ret = intel_guc_ucode_load(dev);
if (ret) {
/*
* If we got an error and GuC submission is enabled, map
* the error to -EIO so the GPU will be declared wedged.
* OTOH, if we didn't intend to use the GuC anyway, just
* discard the error and carry on.
*/
DRM_ERROR("Failed to initialize GuC, error %d%s\n", ret,
i915.enable_guc_submission ? "" :
" (ignored)");
ret = i915.enable_guc_submission ? -EIO : 0;
if (ret)
goto out;
}
}
/* Now it is safe to go back round and do everything else: */