drm/i915/display: Ensure we have "Frame Change" event in DSB commit

Browse source

We may have commit which doesn't have any non-arming plane register
writes. In that case there aren't "Frame Change" event before DSB vblank
evasion which hangs as PIPEDSL register is reading as 0 when PSR state is
SRDENT(PSR1) or DEEP_SLEEP(PSR2). Handle this by ensuring "Frame Change"
event at the begin of DSB commit if using PSR/PR.

v3: dsb_commit as a first parameter
v2: use intel_psr_trigger_frame_change_event

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250213064804.2077127-13-jouni.hogander@intel.com

...

This commit is contained in:

Jouni Högander 2025-02-13 08:48:03 +02:00

parent fa27fa4806

commit ac76a51ddb

1 changed files with 8 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

8

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

View file