drm/i915/alpm: Stop writing ALPM registers when PSR is enabled

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Currently we are seeing these on PTL:

xe 0000:00:02.0: [drm] *ERROR* Timeout waiting for DDI BUF A to get active

These seem to be caused by writing ALPM registers while Panel Replay is
enabled.

Fix this by writing ALPM registers only when Panel Replay is about to be
enabled.

v4: improve comment on intel_psr_panel_replay_enable_sink call
v3: enable/disable ALPM from PSR code

Fixes: 172757acd6 ("drm/i915/lobf: Add lobf enablement in post plane update")
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://lore.kernel.org/r/20250513054814.3702977-3-jouni.hogander@intel.com
(cherry picked from commit a8eb102ce0)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

...

This commit is contained in:

Jouni Högander 2025-05-13 08:48:14 +03:00 • committed by Joonas Lahtinen

parent 411c869ab8

commit eff82fb0d2

2 changed files with 12 additions and 5 deletions

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4

drivers/gpu/drm/i915/display/intel_alpm.c

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13

drivers/gpu/drm/i915/display/intel_psr.c

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