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* [PATCH i-g-t v1 0/2] Fix 2-display test for MST shared-link BW
@ 2026-04-21  6:11 Sowmiya S
  2026-04-21  6:11 ` [PATCH i-g-t v1 1/2] lib/igt_kms: Add MST bandwidth-fitting support and helpers Sowmiya S
                   ` (5 more replies)
  0 siblings, 6 replies; 9+ messages in thread
From: Sowmiya S @ 2026-04-21  6:11 UTC (permalink / raw)
  To: igt-dev; +Cc: swati2.sharma, kunal1.joshi, Sowmiya S

On MST hubs / daisy-chain setups two display streams
share one DP link; a joint atomic commit can be rejected
by the driver if the combined mode bandwidth exceeds the
link capacity. The driver therefore adjusts per-pipe
settings (for example reducing pipe bpp and enabling
dithering) when both streams are committed together,
so tests must pick a mode combination the driver will accept.

Sowmiya S (2):
  lib/igt_kms: Add MST bandwidth-fitting support and helpers
  tests/kms_plane_multiple: Fix 2-display test for MST shared-link BW

 lib/igt_kms.c              | 33 +++++++++++++++
 lib/igt_kms.h              |  3 ++
 tests/kms_plane_multiple.c | 87 ++++++++++++++++++++++++++++++++------
 3 files changed, 109 insertions(+), 14 deletions(-)

-- 
2.43.0


^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2026-04-27  9:04 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-04-21  6:11 [PATCH i-g-t v1 0/2] Fix 2-display test for MST shared-link BW Sowmiya S
2026-04-21  6:11 ` [PATCH i-g-t v1 1/2] lib/igt_kms: Add MST bandwidth-fitting support and helpers Sowmiya S
2026-04-21 12:09   ` Jani Nikula
2026-04-27  9:03     ` S, Sowmiya
2026-04-21  6:11 ` [PATCH i-g-t v1 2/2] tests/kms_plane_multiple: Fix 2-display test for MST shared-link BW Sowmiya S
2026-04-21 21:03 ` ✓ i915.CI.BAT: success for " Patchwork
2026-04-21 21:55 ` ✓ Xe.CI.BAT: " Patchwork
2026-04-22  2:02 ` ✗ Xe.CI.FULL: failure " Patchwork
2026-04-22  4:34 ` ✗ i915.CI.Full: " Patchwork

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