Some registers set during setup might not be persistent after suspend/resume, and also on crtc off/on cycles. This was causing bugs for some people that was unable to get PSR entry state after suspend/resume cycle. v2: Adding some comments and better commit message explaining why this is needed. (by Paulo) v3: Moving psr.setup_done reset to crtc_enable because same issues might apply also on crtc off/on cycle. (by Daniel) Cc: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> Cc: Joe Konno <joe.konno@xxxxxxxxx> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_display.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index b5cbb28..077ab0e 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3938,6 +3938,10 @@ static void intel_crtc_enable_planes(struct drm_crtc *crtc) mutex_lock(&dev->struct_mutex); intel_update_fbc(dev); + /* Forcing a full init sequence here to make sure all + * registers are properly set. Some might not be persistent after + * crtc on/off cycle. */ + dev_priv->psr.setup_done = false; intel_edp_psr_update(dev); mutex_unlock(&dev->struct_mutex); } -- 1.9.3 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
