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* [v2 0/2] drm/i915/display: Implement Display Wa_16030862157
@ 2026-07-15 10:41 Uma Shankar
  2026-07-15 10:29 ` ✓ CI.KUnit: success for " Patchwork
                   ` (6 more replies)
  0 siblings, 7 replies; 10+ messages in thread
From: Uma Shankar @ 2026-07-15 10:41 UTC (permalink / raw)
  To: intel-gfx, intel-xe; +Cc: vinod.govindapillai, suraj.kandpal, Uma Shankar

Interpret 0xF populated-channel count as 16. For 16-channel
configuration, BIOS programs 1111b. A programmed value of 1111b
must be interpreted as 16 channels for memory bandwidth calculations.
This series implements the workaround in driver.

Uma Shankar (2):
  drm/i915/display: Add Wa_16030862157 to the display workaround list
  drm/i915/dram: Interpret 0xF populated-channel count as 16

 drivers/gpu/drm/i915/display/intel_bw.c       | 20 ++++++++++++++++---
 .../gpu/drm/i915/display/intel_display_wa.c   |  2 ++
 .../gpu/drm/i915/display/intel_display_wa.h   |  1 +
 drivers/gpu/drm/i915/display/intel_dram.c     | 12 +++++++++++
 4 files changed, 32 insertions(+), 3 deletions(-)

-- 
2.50.1


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

end of thread, other threads:[~2026-07-15 13:27 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
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2026-07-15 10:41 [v2 0/2] drm/i915/display: Implement Display Wa_16030862157 Uma Shankar
2026-07-15 10:29 ` ✓ CI.KUnit: success for " Patchwork
2026-07-15 10:41 ` [v2 1/2] drm/i915/display: Add Wa_16030862157 to the display workaround list Uma Shankar
2026-07-15 10:41 ` [v2 2/2] drm/i915/dram: Interpret 0xF populated-channel count as 16 Uma Shankar
2026-07-15 12:30   ` Govindapillai, Vinod
2026-07-15 13:27     ` Shankar, Uma
2026-07-15 11:05 ` ✓ Xe.CI.BAT: success for drm/i915/display: Implement Display Wa_16030862157 Patchwork
2026-07-15 11:19 ` ✓ i915.CI.BAT: " Patchwork
2026-07-15 11:23 ` ✓ Xe.CI.FULL: " Patchwork
2026-07-15 12:12 ` ✓ i915.CI.Full: " Patchwork

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