From: Dom Cobley popcornmix@gmail.com
The new clock request API allows us to increase the rate of the core clock as required during mode set while decreasing it when we're done, resulting in a better power-efficiency.
Signed-off-by: Dom Cobley popcornmix@gmail.com Signed-off-by: Maxime Ripard maxime@cerno.tech --- drivers/gpu/drm/vc4/vc4_kms.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c index f0b3e4cf5bce..3550ae9f782e 100644 --- a/drivers/gpu/drm/vc4/vc4_kms.c +++ b/drivers/gpu/drm/vc4/vc4_kms.c @@ -341,6 +341,7 @@ static void vc4_atomic_commit_tail(struct drm_atomic_state *state) struct drm_crtc_state *new_crtc_state; struct drm_crtc *crtc; struct vc4_hvs_state *old_hvs_state; + struct clk_request *core_req; int i;
for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { @@ -354,7 +355,7 @@ static void vc4_atomic_commit_tail(struct drm_atomic_state *state) }
if (vc4->hvs->hvs5) - clk_set_min_rate(hvs->core_clk, 500000000); + core_req = clk_request_start(hvs->core_clk, 500000000);
old_hvs_state = vc4_hvs_get_old_global_state(state); if (!old_hvs_state) @@ -399,7 +400,7 @@ static void vc4_atomic_commit_tail(struct drm_atomic_state *state) drm_atomic_helper_cleanup_planes(dev, state);
if (vc4->hvs->hvs5) - clk_set_min_rate(hvs->core_clk, 0); + clk_request_done(core_req); }
static int vc4_atomic_commit_setup(struct drm_atomic_state *state)