From bcdc0a4520ea59c3e888ebb91c8f41e55841297d Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Mon, 21 Jun 2021 16:13:02 +0200 Subject: [PATCH] drm/vc4: crtc: Add some logging The encoder retrieval code has been a source of bugs and glitches in the past and the crtc <-> encoder association been wrong in a number of different ways. Add some logging to quickly spot issues if they occur. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/vc4/vc4_crtc.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/gpu/drm/vc4/vc4_crtc.c +++ b/drivers/gpu/drm/vc4/vc4_crtc.c @@ -525,6 +525,9 @@ static void vc4_crtc_atomic_disable(stru struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, old_state); struct drm_device *dev = crtc->dev; + drm_dbg(dev, "Disabling CRTC %s (%u) connected to Encoder %s (%u)", + crtc->name, crtc->base.id, encoder->name, encoder->base.id); + require_hvs_enabled(dev); /* Disable vblank irq handling before crtc is disabled. */ @@ -556,6 +559,9 @@ static void vc4_crtc_atomic_enable(struc struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, new_state); struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder); + drm_dbg(dev, "Enabling CRTC %s (%u) connected to Encoder %s (%u)", + crtc->name, crtc->base.id, encoder->name, encoder->base.id); + require_hvs_enabled(dev); /* Enable vblank irq handling before crtc is started otherwise