From fe92d91a83eca58dd756fa2558470c3f68e36499 Mon Sep 17 00:00:00 2001 From: popcornmix Date: Thu, 5 Sep 2019 17:59:14 +0100 Subject: [PATCH] v3d_gem: Kick the clock so firmware knows we are using firmware clock interface Setting the v3d clock to low value allows firmware to handle dvfs in case where v3d hardware is not being actively used (e.g. console use). Signed-off-by: popcornmix --- drivers/gpu/drm/v3d/v3d_gem.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/gpu/drm/v3d/v3d_gem.c +++ b/drivers/gpu/drm/v3d/v3d_gem.c @@ -955,6 +955,10 @@ v3d_gem_init(struct drm_device *dev) mutex_init(&v3d->clk_lock); INIT_DELAYED_WORK(&v3d->clk_down_work, v3d_clock_down_work); + /* kick the clock so firmware knows we are using firmware clock interface */ + v3d_clock_up_get(v3d); + v3d_clock_up_put(v3d); + /* Note: We don't allocate address 0. Various bits of HW * treat 0 as special, such as the occlusion query counters * where 0 means "disabled".