drm/vc4: Remove request for min clocks when hdmi output is disabled

Currently, booting with no hdmi connected has: pi@pi4:~ $ vcgencmd measure_clock hdmi pixel frequency(9)=120010256 frequency(29)=74988280 After connecting hdmi we get: pi@pi4:~ $ vcgencmd measure_clock hdmi pixel frequency(9)=300005856 frequency(29)=149989744 and that persists after disconnecting hdmi I can measure this on a power supply as [email protected] (52mW). We should always remove clk_set_min_rate requests when we no longer need them. Signed-off-by: Dom Cobley <[email protected]>
raspberrypi · Oct 14, 2024 · fa099e6 · fa099e6
1 parent 239df14
commit fa099e6
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1196,6 +1196,10 @@ static void vc4_hdmi_encoder_post_crtc_disable(struct drm_encoder *encoder,
 
 	vc4_hdmi_disable_scrambling(encoder);
 
+	/* we not longer have a requirement on minimum clock rates */
+	clk_set_min_rate(vc4_hdmi->pixel_bvb_clock, 0);
+	clk_set_min_rate(vc4_hdmi->hsm_clock, 0);
+
 	drm_dev_exit(idx);
 
 out: