drm/radeon/kms: avoid oops on mac r4xx cards
They don't have an atombios so don't attempt to use it for eng/mem clocks. Reported by spoonb on #radeon fixes: https://bugs.freedesktop.org/show_bug.cgi?id=28671 Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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@ -780,6 +780,13 @@ int radeon_asic_init(struct radeon_device *rdev)
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case CHIP_R423:
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case CHIP_RV410:
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rdev->asic = &r420_asic;
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/* handle macs */
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if (rdev->bios == NULL) {
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rdev->asic->get_engine_clock = &radeon_legacy_get_engine_clock;
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rdev->asic->set_engine_clock = &radeon_legacy_set_engine_clock;
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rdev->asic->get_memory_clock = &radeon_legacy_get_memory_clock;
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rdev->asic->set_memory_clock = NULL;
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}
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break;
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case CHIP_RS400:
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case CHIP_RS480:
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