On Fri, 7 May 2021 at 16:05, Maxime Ripard maxime@cerno.tech wrote:

Since we fixed the hooks to disable the encoder at boot, we now have an unbalanced clk_disable call at boot since we never enabled them in the first place.

Let's mimic the state of the hardware and enable the clocks at boot if the controller is enabled to get the use-count right.

Cc: stable@vger.kernel.org # v5.10+ Fixes: 09c438139b8f ("drm/vc4: hdmi: Implement finer-grained hooks") Signed-off-by: Maxime Ripard maxime@cerno.tech

Reviewed-by: Dave Stevenson dave.stevenson@raspberrypi.com

---

drivers/gpu/drm/vc4/vc4_hdmi.c | 8 ++++++++ 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 1fda574579af..9c919472ae84 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -1995,6 +1995,14 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data) if (vc4_hdmi->variant->reset) vc4_hdmi->variant->reset(vc4_hdmi);

•   if ((of_device_is_compatible(dev->of_node, "brcm,bcm2711-hdmi0") ||
  

•        of_device_is_compatible(dev->of_node, "brcm,bcm2711-hdmi1")) &&
  

•       HDMI_READ(HDMI_VID_CTL) & VC4_HD_VID_CTL_ENABLE) {
  

•           clk_prepare_enable(vc4_hdmi->pixel_clock);
  

•           clk_prepare_enable(vc4_hdmi->hsm_clock);
  

•           clk_prepare_enable(vc4_hdmi->pixel_bvb_clock);
  

•   }
  

•   pm_runtime_enable(dev);
  
    drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS);
  

-- 2.31.1