target/linux/bcm27xx/patches-5.10/950-0475-drm-vc4-Add-HDR-metadata-property-to-the-VC5-HDMI-co.patch

   1 From 82a5aa1df1b04efef46c7be82a7d71ea5300ce92 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Wed, 2 Dec 2020 18:36:24 +0000
   4 Subject: [PATCH] drm/vc4: Add HDR metadata property to the VC5 HDMI
   5  connectors
   6
   7 Now that we can export deeper colour depths, add in the signalling
   8 for HDR metadata.
   9
  10 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  11 ---
  12  drivers/gpu/drm/vc4/vc4_hdmi.c | 28 ++++++++++++++++++++++++++++
  13  drivers/gpu/drm/vc4/vc4_hdmi.h |  3 +++
  14  2 files changed, 31 insertions(+)
  15
  16 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
  17 +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
  18 @@ -309,6 +309,10 @@ static int vc4_hdmi_connector_init(struc
  19         connector->doublescan_allowed = 0;
  20         connector->stereo_allowed = 1;
  21
  22 +       if (vc4_hdmi->variant->supports_hdr)
  23 +               drm_object_attach_property(&connector->base,
  24 +                       connector->dev->mode_config.hdr_output_metadata_property, 0);
  25 +
  26         drm_connector_attach_encoder(connector, encoder);
  27
  28         return 0;
  29 @@ -448,6 +452,25 @@ static void vc4_hdmi_set_audio_infoframe
  30         vc4_hdmi_write_infoframe(encoder, &frame);
  31  }
  32
  33 +static void vc4_hdmi_set_hdr_infoframe(struct drm_encoder *encoder)
  34 +{
  35 +       struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
  36 +       struct drm_connector *connector = &vc4_hdmi->connector;
  37 +       struct drm_connector_state *conn_state = connector->state;
  38 +       union hdmi_infoframe frame;
  39 +
  40 +       if (!vc4_hdmi->variant->supports_hdr)
  41 +               return;
  42 +
  43 +       if (!conn_state->hdr_output_metadata)
  44 +               return;
  45 +
  46 +       if (drm_hdmi_infoframe_set_hdr_metadata(&frame.drm, conn_state))
  47 +               return;
  48 +
  49 +       vc4_hdmi_write_infoframe(encoder, &frame);
  50 +}
  51 +
  52  static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder)
  53  {
  54         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
  55 @@ -460,6 +483,8 @@ static void vc4_hdmi_set_infoframes(stru
  56          */
  57         if (vc4_hdmi->audio.streaming)
  58                 vc4_hdmi_set_audio_infoframe(encoder);
  59 +
  60 +       vc4_hdmi_set_hdr_infoframe(encoder);
  61  }
  62
  63  static void vc4_hdmi_encoder_post_crtc_disable(struct drm_encoder *encoder,
  64 @@ -2282,6 +2307,7 @@ static const struct vc4_hdmi_variant bcm
  65         .phy_rng_enable         = vc4_hdmi_phy_rng_enable,
  66         .phy_rng_disable        = vc4_hdmi_phy_rng_disable,
  67         .channel_map            = vc4_hdmi_channel_map,
  68 +       .supports_hdr           = false,
  69  };
  70
  71  static const struct vc4_hdmi_variant bcm2711_hdmi0_variant = {
  72 @@ -2309,6 +2335,7 @@ static const struct vc4_hdmi_variant bcm
  73         .phy_rng_enable         = vc5_hdmi_phy_rng_enable,
  74         .phy_rng_disable        = vc5_hdmi_phy_rng_disable,
  75         .channel_map            = vc5_hdmi_channel_map,
  76 +       .supports_hdr           = true,
  77  };
  78
  79  static const struct vc4_hdmi_variant bcm2711_hdmi1_variant = {
  80 @@ -2336,6 +2363,7 @@ static const struct vc4_hdmi_variant bcm
  81         .phy_rng_enable         = vc5_hdmi_phy_rng_enable,
  82         .phy_rng_disable        = vc5_hdmi_phy_rng_disable,
  83         .channel_map            = vc5_hdmi_channel_map,
  84 +       .supports_hdr           = true,
  85  };
  86
  87  static const struct of_device_id vc4_hdmi_dt_match[] = {
  88 --- a/drivers/gpu/drm/vc4/vc4_hdmi.h
  89 +++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
  90 @@ -99,6 +99,9 @@ struct vc4_hdmi_variant {
  91
  92         /* Callback to get channel map */
  93         u32 (*channel_map)(struct vc4_hdmi *vc4_hdmi, u32 channel_mask);
  94 +
  95 +       /* Enables HDR metadata */
  96 +       bool supports_hdr;
  97  };
  98
  99  /* HDMI audio information */