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From 82a5aa1df1b04efef46c7be82a7d71ea5300ce92 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Wed, 2 Dec 2020 18:36:24 +0000
Subject: [PATCH] drm/vc4: Add HDR metadata property to the VC5 HDMI
connectors
Now that we can export deeper colour depths, add in the signalling
for HDR metadata.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 28 ++++++++++++++++++++++++++++
drivers/gpu/drm/vc4/vc4_hdmi.h | 3 +++
2 files changed, 31 insertions(+)
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -310,6 +310,10 @@ static int vc4_hdmi_connector_init(struc
connector->doublescan_allowed = 0;
connector->stereo_allowed = 1;
+ if (vc4_hdmi->variant->supports_hdr)
+ drm_object_attach_property(&connector->base,
+ connector->dev->mode_config.hdr_output_metadata_property, 0);
+
drm_connector_attach_encoder(connector, encoder);
return 0;
@@ -449,6 +453,25 @@ static void vc4_hdmi_set_audio_infoframe
vc4_hdmi_write_infoframe(encoder, &frame);
}
+static void vc4_hdmi_set_hdr_infoframe(struct drm_encoder *encoder)
+{
+ struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct drm_connector *connector = &vc4_hdmi->connector;
+ struct drm_connector_state *conn_state = connector->state;
+ union hdmi_infoframe frame;
+
+ if (!vc4_hdmi->variant->supports_hdr)
+ return;
+
+ if (!conn_state->hdr_output_metadata)
+ return;
+
+ if (drm_hdmi_infoframe_set_hdr_metadata(&frame.drm, conn_state))
+ return;
+
+ vc4_hdmi_write_infoframe(encoder, &frame);
+}
+
static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder)
{
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
@@ -461,6 +484,8 @@ static void vc4_hdmi_set_infoframes(stru
*/
if (vc4_hdmi->audio.streaming)
vc4_hdmi_set_audio_infoframe(encoder);
+
+ vc4_hdmi_set_hdr_infoframe(encoder);
}
static void vc4_hdmi_encoder_post_crtc_disable(struct drm_encoder *encoder,
@@ -2304,6 +2329,7 @@ static const struct vc4_hdmi_variant bcm
.phy_rng_enable = vc4_hdmi_phy_rng_enable,
.phy_rng_disable = vc4_hdmi_phy_rng_disable,
.channel_map = vc4_hdmi_channel_map,
+ .supports_hdr = false,
};
static const struct vc4_hdmi_variant bcm2711_hdmi0_variant = {
@@ -2331,6 +2357,7 @@ static const struct vc4_hdmi_variant bcm
.phy_rng_enable = vc5_hdmi_phy_rng_enable,
.phy_rng_disable = vc5_hdmi_phy_rng_disable,
.channel_map = vc5_hdmi_channel_map,
+ .supports_hdr = true,
};
static const struct vc4_hdmi_variant bcm2711_hdmi1_variant = {
@@ -2358,6 +2385,7 @@ static const struct vc4_hdmi_variant bcm
.phy_rng_enable = vc5_hdmi_phy_rng_enable,
.phy_rng_disable = vc5_hdmi_phy_rng_disable,
.channel_map = vc5_hdmi_channel_map,
+ .supports_hdr = true,
};
static const struct of_device_id vc4_hdmi_dt_match[] = {
--- a/drivers/gpu/drm/vc4/vc4_hdmi.h
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
@@ -99,6 +99,9 @@ struct vc4_hdmi_variant {
/* Callback to get channel map */
u32 (*channel_map)(struct vc4_hdmi *vc4_hdmi, u32 channel_mask);
+
+ /* Enables HDR metadata */
+ bool supports_hdr;
};
/* HDMI audio information */
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