target/linux/bcm27xx/patches-5.15/950-0642-drm-vc4-hdmi-Fix-HDMI-monitor-detection-in-polled-mo.patch

   1 From a1bf3abe0c1093e81e5dd59b6d3b09b9ebb3a17d Mon Sep 17 00:00:00 2001
   2 From: Matthias Reichl <hias@horus.com>
   3 Date: Thu, 30 Dec 2021 14:28:37 +0100
   4 Subject: [PATCH] drm/vc4: hdmi: Fix HDMI monitor detection in polled
   5  mode
   6
   7 When vc4_hdmi_connector_detect() was called in
   8 connector_status_connected state it incorrectly cleared the
   9 hdmi_monitor flag, leading to no audio on RPi3.
  10
  11 Fix this by clearing hdmi_monitor only when the hpd check
  12 indicated no connection or if reading the edid failed.
  13
  14 Signed-off-by: Matthias Reichl <hias@horus.com>
  15 ---
  16  drivers/gpu/drm/vc4/vc4_hdmi.c | 5 ++++-
  17  1 file changed, 4 insertions(+), 1 deletion(-)
  18
  19 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
  20 +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
  21 @@ -242,7 +242,6 @@ vc4_hdmi_connector_detect(struct drm_con
  22                         connected = true;
  23         }
  24
  25 -       vc4_hdmi->encoder.hdmi_monitor = false;
  26         if (connected) {
  27                 if (connector->status != connector_status_connected) {
  28                         struct edid *edid = drm_get_edid(connector, vc4_hdmi->ddc);
  29 @@ -251,6 +250,8 @@ vc4_hdmi_connector_detect(struct drm_con
  30                                 cec_s_phys_addr_from_edid(vc4_hdmi->cec_adap, edid);
  31                                 vc4_hdmi->encoder.hdmi_monitor = drm_detect_hdmi_monitor(edid);
  32                                 kfree(edid);
  33 +                       } else {
  34 +                               vc4_hdmi->encoder.hdmi_monitor = false;
  35                         }
  36                 }
  37
  38 @@ -260,6 +261,8 @@ vc4_hdmi_connector_detect(struct drm_con
  39                 return connector_status_connected;
  40         }
  41
  42 +       vc4_hdmi->encoder.hdmi_monitor = false;
  43 +
  44         cec_phys_addr_invalidate(vc4_hdmi->cec_adap);
  45         pm_runtime_put(&vc4_hdmi->pdev->dev);
  46         mutex_unlock(&vc4_hdmi->mutex);