drm/i915/vrr: Fix intel_vrr_always_use_vrr_tg()==true on TGL

Browse source

On TGL the hardware always needs TRANS_VBLANK.VBLANK_START
to be programemd with VACTIVE+SCL. Make it so.

The current way of programming it with crtc_vblank_start only
works for the legacy timing generator, as there the delayed
vblank does happen exactly at VACTIVE+SCL.

But if one tries to change intel_vrr_always_use_vrr_tg() to
always use the VRR timing generator on TGL, crtc_vblank_start
will point to the VRR timing generator's delayed vblank,
which may not match VACTIVE+SCL.

Fortunately the state checker caught the issue right away
when I tried intel_vrr_always_use_vrr_tg()==true on TGL.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20251020185038.4272-2-ville.syrjala@linux.intel.com
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>

...

This commit is contained in:

Ville Syrjälä 2025-10-20 21:50:17 +03:00

parent 0790925dad

commit aa88371928

1 changed files with 6 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

6

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

View file