drm/i915/display/vrr: Send VRR push to flip the frame

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VRR achieves vblank stretching using the HW PUSH functionality.
So once the VRR is enabled during modeset then for each flip
request from userspace, in the atomic tail pipe_update_end()
we need to set the VRR push bit in HW for it to terminate
the vblank at configured flipline or anytime after flipline
or latest at the Vmax.

The HW clears the PUSH bit after the double buffer updates
are completed.

v2:
* Move send push to after irq en (Manasi)
* Call send push unconditionally (Jani N)

v3:
* Stall w.r.t Vrr vmax (Manasi, Gary Smith)

v4:
* Remove the rmw (Ville)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Gary Smith <gary.k.smith@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210122232647.22688-11-manasi.d.navare@intel.com

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This commit is contained in:

Manasi Navare 2021-01-22 15:26:40 -08:00

parent aa52b39dc5

commit 13c6d51f53

3 changed files with 18 additions and 0 deletions

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4

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

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13

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

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1

drivers/gpu/drm/i915/display/intel_vrr.h

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