The HVS core clock isn't really obvious, so let's add a bunch more comments and some logging for easier debugging.
Signed-off-by: Maxime Ripard maxime@cerno.tech --- drivers/gpu/drm/vc4/vc4_kms.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c index 24de29bc1cda..6fe03fc17d73 100644 --- a/drivers/gpu/drm/vc4/vc4_kms.c +++ b/drivers/gpu/drm/vc4/vc4_kms.c @@ -389,8 +389,15 @@ static void vc4_atomic_commit_tail(struct drm_atomic_state *state) 500000000, new_hvs_state->core_clock_rate);
+ drm_dbg(dev, "Raising the core clock at %lu Hz\n", core_rate); + + /* + * Do a temporary request on the core clock during the + * modeset. + */ clk_set_min_rate(hvs->core_clk, core_rate); } + drm_atomic_helper_commit_modeset_disables(dev, state);
vc4_ctm_commit(vc4, state); @@ -416,6 +423,10 @@ static void vc4_atomic_commit_tail(struct drm_atomic_state *state) drm_dbg(dev, "Running the core clock at %lu Hz\n", new_hvs_state->core_clock_rate);
+ /* + * Request a clock rate based on the current HVS + * requirements. + */ clk_set_min_rate(hvs->core_clk, new_hvs_state->core_clock_rate); } }