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* [PATCH i-g-t v4 0/3] Fix 2-display test for MST shared-link BW
@ 2026-06-29  9:26 Sowmiya S
  2026-06-29  9:26 ` [PATCH i-g-t v4 1/3] lib/igt_kms: Add MST bandwidth-fitting support and helpers Sowmiya S
                   ` (6 more replies)
  0 siblings, 7 replies; 10+ messages in thread
From: Sowmiya S @ 2026-06-29  9:26 UTC (permalink / raw)
  To: igt-dev; +Cc: kunal1.joshi, swati2.sharma, ramanaidu.naladala, 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 (3):
  lib/igt_kms: Add MST bandwidth-fitting support and helpers
  tests/kms_plane_multiple: Fix 2-display test for MST shared-link BW
  tests/intel/kms_pipe_stress: Fit display modes to MST link budget

 lib/igt_kms.c                 | 74 ++++++++++++++++++++++++++++++
 lib/igt_kms.h                 |  1 +
 tests/intel/kms_pipe_stress.c | 51 +++++++++++++++++++++
 tests/kms_plane_multiple.c    | 85 +++++++++++++++++++++++++++++------
 4 files changed, 197 insertions(+), 14 deletions(-)

-- 
2.51.0


^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2026-06-30  7:37 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-06-29  9:26 [PATCH i-g-t v4 0/3] Fix 2-display test for MST shared-link BW Sowmiya S
2026-06-29  9:26 ` [PATCH i-g-t v4 1/3] lib/igt_kms: Add MST bandwidth-fitting support and helpers Sowmiya S
2026-06-29 10:02   ` Jani Nikula
2026-06-29  9:26 ` [PATCH i-g-t v4 2/3] tests/kms_plane_multiple: Fix 2-display test for MST shared-link BW Sowmiya S
2026-06-29  9:26 ` [PATCH i-g-t v4 3/3] tests/intel/kms_pipe_stress: Fit display modes to MST link budget Sowmiya S
2026-06-29 10:05   ` Jani Nikula
2026-06-29 20:37 ` ✓ i915.CI.BAT: success for Fix 2-display test for MST shared-link BW (rev4) Patchwork
2026-06-29 20:48 ` ✓ Xe.CI.BAT: " Patchwork
2026-06-30  4:28 ` ✓ Xe.CI.FULL: " Patchwork
2026-06-30  7:37 ` ✓ i915.CI.Full: " Patchwork

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