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278c35822d
Fix 2 issues when writing LRC workarounds by copying the same handling
done when processing other RTP entries:
For masked registers, it was not correctly setting the upper 16bits.
Differently than i915, the entry itself doesn't set the upper bits
for masked registers: this is done when applying them. Testing on ADL-P:
Before:
[drm:xe_gt_record_default_lrcs [xe]] LRC WA rcs0 save-restore MMIOs
[drm:xe_gt_record_default_lrcs [xe]] REG[0x2580] = 0x00000002
...
[drm:xe_gt_record_default_lrcs [xe]] REG[0x7018] = 0x00002000
[drm:xe_gt_record_default_lrcs [xe]] REG[0x7300] = 0x00000040
[drm:xe_gt_record_default_lrcs [xe]] REG[0x7304] = 0x00000200
After:
[drm:xe_gt_record_default_lrcs [xe]] LRC WA rcs0 save-restore MMIOs
[drm:xe_gt_record_default_lrcs [xe]] REG[0x2580] = 0x00060002
...
[drm:xe_gt_record_default_lrcs [xe]] REG[0x7018] = 0x20002000
[drm:xe_gt_record_default_lrcs [xe]] REG[0x7300] = 0x00400040
[drm:xe_gt_record_default_lrcs [xe]] REG[0x7304] = 0x02000200
All of these registers are masked registers, so writing to them without
the relevant bits in the upper 16b doesn't have any effect.
Also, this adds support to regular registers; previously it was assumed
that LRC entries would only contain masked registers. However this is
not true. 0x6604 is not a masked register, but used in workarounds for
e.g. ADL-P. See commit
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Linux kernel
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