target/linux/bcm27xx/patches-6.1/950-0931-drm-vc4-hdmi-Enable-the-audio-clock.patch

   1 From 0da58dfbd2cc2cfa14a629787b9ba6fa10b5f666 Mon Sep 17 00:00:00 2001
   2 From: Maxime Ripard <maxime@cerno.tech>
   3 Date: Wed, 29 Mar 2023 15:26:52 +0100
   4 Subject: [PATCH] drm/vc4: hdmi: Enable the audio clock
   5
   6 The audio clock is used by the HDMI controller driver and we were using
   7 it to get its audio rate and compute the dividers needed to reach a
   8 given audio sample rate.
   9
  10 However, we were never enabling it, which was resulting in lockups on
  11 the BCM2712.
  12
  13 Fixes: 632ee3aa8786 ("drm/vc4: hdmi: Add audio-related callbacks")
  14 Signed-off-by: Maxime Ripard <maxime@cerno.tech>
  15 ---
  16  drivers/gpu/drm/vc4/vc4_hdmi.c | 5 +++++
  17  1 file changed, 5 insertions(+)
  18
  19 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
  20 +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
  21 @@ -3625,6 +3625,7 @@ static int vc4_hdmi_runtime_suspend(stru
  22  {
  23         struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
  24
  25 +       clk_disable_unprepare(vc4_hdmi->audio_clock);
  26         clk_disable_unprepare(vc4_hdmi->hsm_rpm_clock);
  27
  28         return 0;
  29 @@ -3666,6 +3667,10 @@ static int vc4_hdmi_runtime_resume(struc
  30                 goto err_disable_clk;
  31         }
  32
  33 +       ret = clk_prepare_enable(vc4_hdmi->audio_clock);
  34 +       if (ret)
  35 +               goto err_disable_clk;
  36 +
  37         if (vc4_hdmi->variant->reset)
  38                 vc4_hdmi->variant->reset(vc4_hdmi);
  39