All the drivers that implement HDR output call pretty much the same
function to initialise the hdr_output_metadata property, and while the
creation of that property is in a helper, every driver uses the same
code to attach it.
Provide a helper for it as well
Signed-off-by: Maxime Ripard <[email protected]>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 +---
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 3 +--
drivers/gpu/drm/drm_connector.c | 21 +++++++++++++++++++
drivers/gpu/drm/i915/display/intel_hdmi.c | 3 +--
include/drm/drm_connector.h | 1 +
5 files changed, 25 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 22124f76d0b5..06908a3cee0f 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7017,9 +7017,7 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
if (connector_type == DRM_MODE_CONNECTOR_HDMIA ||
connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
connector_type == DRM_MODE_CONNECTOR_eDP) {
- drm_object_attach_property(
- &aconnector->base.base,
- dm->ddev->mode_config.hdr_output_metadata_property, 0);
+ drm_connector_attach_hdr_output_metadata_property(&aconnector->base);
if (!aconnector->mst_port)
drm_connector_attach_vrr_capable_property(&aconnector->base);
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index dda4fa9a1a08..f24bbb840dbf 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2492,8 +2492,7 @@ static int dw_hdmi_connector_create(struct dw_hdmi *hdmi)
drm_connector_attach_max_bpc_property(connector, 8, 16);
if (hdmi->version >= 0x200a && hdmi->plat_data->use_drm_infoframe)
- drm_object_attach_property(&connector->base,
- connector->dev->mode_config.hdr_output_metadata_property, 0);
+ drm_connector_attach_hdr_output_metadata_property(connector);
drm_connector_attach_encoder(connector, hdmi->bridge.encoder);
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 98b6ec45ef96..e25248e23e18 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -2149,6 +2149,27 @@ int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
}
EXPORT_SYMBOL(drm_connector_attach_max_bpc_property);
+/**
+ * drm_connector_attach_hdr_output_metadata_property - attach "HDR_OUTPUT_METADA" property
+ * @connector: connector to attach the property on.
+ *
+ * This is used to allow the userspace to send HDR Metadata to the
+ * driver.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *connector)
+{
+ struct drm_device *dev = connector->dev;
+ struct drm_property *prop = dev->mode_config.hdr_output_metadata_property;
+
+ drm_object_attach_property(&connector->base, prop, 0);
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_connector_attach_hdr_output_metadata_property);
+
/**
* drm_connector_set_vrr_capable_property - sets the variable refresh rate
* capable property for a connector
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index c5959590562b..52c051efb7b7 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -2958,8 +2958,7 @@ intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *c
drm_connector_attach_content_type_property(connector);
if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
- drm_object_attach_property(&connector->base,
- connector->dev->mode_config.hdr_output_metadata_property, 0);
+ drm_connector_attach_hdr_output_metadata_property(connector);
if (!HAS_GMCH(dev_priv))
drm_connector_attach_max_bpc_property(connector, 8, 12);
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 1922b278ffad..32172dab8427 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1671,6 +1671,7 @@ int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
u32 scaling_mode_mask);
int drm_connector_attach_vrr_capable_property(
struct drm_connector *connector);
+int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *connector);
int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector);
int drm_mode_create_dp_colorspace_property(struct drm_connector *connector);
--
2.30.2
All the drivers that support the HDR metadata property have a similar
function to compare the metadata from one connector state to the next,
and force a mode change if they differ.
All these functions run pretty much the same code, so let's turn it into
an helper that can be shared across those drivers.
Signed-off-by: Maxime Ripard <[email protected]>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 21 +-------------
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 17 +----------
drivers/gpu/drm/drm_connector.c | 28 +++++++++++++++++++
drivers/gpu/drm/i915/display/intel_atomic.c | 13 +--------
include/drm/drm_connector.h | 2 ++
5 files changed, 33 insertions(+), 48 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 06908a3cee0f..4eb5201e566a 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5924,25 +5924,6 @@ static int fill_hdr_info_packet(const struct drm_connector_state *state,
return 0;
}
-static bool
-is_hdr_metadata_different(const struct drm_connector_state *old_state,
- const struct drm_connector_state *new_state)
-{
- struct drm_property_blob *old_blob = old_state->hdr_output_metadata;
- struct drm_property_blob *new_blob = new_state->hdr_output_metadata;
-
- if (old_blob != new_blob) {
- if (old_blob && new_blob &&
- old_blob->length == new_blob->length)
- return memcmp(old_blob->data, new_blob->data,
- old_blob->length);
-
- return true;
- }
-
- return false;
-}
-
static int
amdgpu_dm_connector_atomic_check(struct drm_connector *conn,
struct drm_atomic_state *state)
@@ -5960,7 +5941,7 @@ amdgpu_dm_connector_atomic_check(struct drm_connector *conn,
if (!crtc)
return 0;
- if (is_hdr_metadata_different(old_con_state, new_con_state)) {
+ if (!drm_connector_atomic_hdr_metadata_equal(old_con_state, new_con_state)) {
struct dc_info_packet hdr_infopacket;
ret = fill_hdr_info_packet(new_con_state, &hdr_infopacket);
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index f24bbb840dbf..f871e33c2fc9 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2395,21 +2395,6 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
return ret;
}
-static bool hdr_metadata_equal(const struct drm_connector_state *old_state,
- const struct drm_connector_state *new_state)
-{
- struct drm_property_blob *old_blob = old_state->hdr_output_metadata;
- struct drm_property_blob *new_blob = new_state->hdr_output_metadata;
-
- if (!old_blob || !new_blob)
- return old_blob == new_blob;
-
- if (old_blob->length != new_blob->length)
- return false;
-
- return !memcmp(old_blob->data, new_blob->data, old_blob->length);
-}
-
static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
struct drm_atomic_state *state)
{
@@ -2423,7 +2408,7 @@ static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
if (!crtc)
return 0;
- if (!hdr_metadata_equal(old_state, new_state)) {
+ if (!drm_connector_atomic_hdr_metadata_equal(old_state, new_state)) {
crtc_state = drm_atomic_get_crtc_state(state, crtc);
if (IS_ERR(crtc_state))
return PTR_ERR(crtc_state);
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index e25248e23e18..d781a3a1e9bf 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -2170,6 +2170,34 @@ int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *conn
}
EXPORT_SYMBOL(drm_connector_attach_hdr_output_metadata_property);
+/**
+ * drm_connector_atomic_hdr_metadata_equal - checks if the hdr metadata changed
+ * @old_state: old connector state to compare
+ * @new_state: new connector state to compare
+ *
+ * This is used by HDR-enabled drivers to test whether the HDR metadata
+ * have changed between two different connector state (and thus probably
+ * requires a full blown mode change).
+ *
+ * Returns:
+ * True if the metadata are equal, False otherwise
+ */
+bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state,
+ struct drm_connector_state *new_state)
+{
+ struct drm_property_blob *old_blob = old_state->hdr_output_metadata;
+ struct drm_property_blob *new_blob = new_state->hdr_output_metadata;
+
+ if (!old_blob || !new_blob)
+ return old_blob == new_blob;
+
+ if (old_blob->length != new_blob->length)
+ return false;
+
+ return !memcmp(old_blob->data, new_blob->data, old_blob->length);
+}
+EXPORT_SYMBOL(drm_connector_atomic_hdr_metadata_equal);
+
/**
* drm_connector_set_vrr_capable_property - sets the variable refresh rate
* capable property for a connector
diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
index e00fdc47c0eb..efec9454af5a 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -109,16 +109,6 @@ int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
return -EINVAL;
}
-static bool blob_equal(const struct drm_property_blob *a,
- const struct drm_property_blob *b)
-{
- if (a && b)
- return a->length == b->length &&
- !memcmp(a->data, b->data, a->length);
-
- return !a == !b;
-}
-
int intel_digital_connector_atomic_check(struct drm_connector *conn,
struct drm_atomic_state *state)
{
@@ -149,8 +139,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
new_conn_state->base.content_type != old_conn_state->base.content_type ||
new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode ||
- !blob_equal(new_conn_state->base.hdr_output_metadata,
- old_conn_state->base.hdr_output_metadata))
+ !drm_connector_atomic_hdr_metadata_equal(old_state, new_state))
crtc_state->mode_changed = true;
return 0;
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 32172dab8427..1f51d73ca715 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1672,6 +1672,8 @@ int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
int drm_connector_attach_vrr_capable_property(
struct drm_connector *connector);
int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *connector);
+bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state,
+ struct drm_connector_state *new_state);
int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector);
int drm_mode_create_dp_colorspace_property(struct drm_connector *connector);
--
2.30.2
From: Dave Stevenson <[email protected]>
Now that we can export deeper colour depths, add in the signalling
for HDR metadata.
Signed-off-by: Dave Stevenson <[email protected]>
Signed-off-by: Maxime Ripard <[email protected]>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 53 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/vc4/vc4_hdmi.h | 3 ++
2 files changed, 56 insertions(+)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index eee9751009c2..c8846cf9dd24 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -214,6 +214,31 @@ static int vc4_hdmi_connector_get_modes(struct drm_connector *connector)
return ret;
}
+static int vc4_hdmi_connector_atomic_check(struct drm_connector *connector,
+ struct drm_atomic_state *state)
+{
+ struct drm_connector_state *old_state =
+ drm_atomic_get_old_connector_state(state, connector);
+ struct drm_connector_state *new_state =
+ drm_atomic_get_new_connector_state(state, connector);
+ struct drm_crtc *crtc = new_state->crtc;
+
+ if (!crtc)
+ return 0;
+
+ if (!drm_connector_atomic_hdr_metadata_equal(old_state, new_state)) {
+ struct drm_crtc_state *crtc_state;
+
+ crtc_state = drm_atomic_get_crtc_state(state, crtc);
+ if (IS_ERR(crtc_state))
+ return PTR_ERR(crtc_state);
+
+ crtc_state->mode_changed = true;
+ }
+
+ return 0;
+}
+
static void vc4_hdmi_connector_reset(struct drm_connector *connector)
{
struct vc4_hdmi_connector_state *old_state =
@@ -263,6 +288,7 @@ static const struct drm_connector_funcs vc4_hdmi_connector_funcs = {
static const struct drm_connector_helper_funcs vc4_hdmi_connector_helper_funcs = {
.get_modes = vc4_hdmi_connector_get_modes,
+ .atomic_check = vc4_hdmi_connector_atomic_check,
};
static int vc4_hdmi_connector_init(struct drm_device *dev,
@@ -299,6 +325,9 @@ static int vc4_hdmi_connector_init(struct drm_device *dev,
connector->interlace_allowed = 1;
connector->doublescan_allowed = 0;
+ if (vc4_hdmi->variant->supports_hdr)
+ drm_connector_attach_hdr_output_metadata_property(connector);
+
drm_connector_attach_encoder(connector, encoder);
return 0;
@@ -432,6 +461,25 @@ static void vc4_hdmi_set_audio_infoframe(struct drm_encoder *encoder)
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);
@@ -444,6 +492,8 @@ static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder)
*/
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,
@@ -2101,6 +2151,7 @@ static const struct vc4_hdmi_variant bcm2835_variant = {
.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 = {
@@ -2128,6 +2179,7 @@ static const struct vc4_hdmi_variant bcm2711_hdmi0_variant = {
.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 = {
@@ -2155,6 +2207,7 @@ static const struct vc4_hdmi_variant bcm2711_hdmi1_variant = {
.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[] = {
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h
index 3cebd1fd00fc..060bcaefbeb5 100644
--- 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 */
--
2.30.2
On 2021-03-19 8:49 a.m., Maxime Ripard wrote:
> All the drivers that support the HDR metadata property have a similar
> function to compare the metadata from one connector state to the next,
> and force a mode change if they differ.
>
> All these functions run pretty much the same code, so let's turn it into
> an helper that can be shared across those drivers.
>
> Signed-off-by: Maxime Ripard <[email protected]>
Patches 1 & 2 are
Reviewed-by: Harry Wentland <[email protected]>
Harry
> ---
> .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 21 +-------------
> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 17 +----------
> drivers/gpu/drm/drm_connector.c | 28 +++++++++++++++++++
> drivers/gpu/drm/i915/display/intel_atomic.c | 13 +--------
> include/drm/drm_connector.h | 2 ++
> 5 files changed, 33 insertions(+), 48 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 06908a3cee0f..4eb5201e566a 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -5924,25 +5924,6 @@ static int fill_hdr_info_packet(const struct drm_connector_state *state,
> return 0;
> }
>
> -static bool
> -is_hdr_metadata_different(const struct drm_connector_state *old_state,
> - const struct drm_connector_state *new_state)
> -{
> - struct drm_property_blob *old_blob = old_state->hdr_output_metadata;
> - struct drm_property_blob *new_blob = new_state->hdr_output_metadata;
> -
> - if (old_blob != new_blob) {
> - if (old_blob && new_blob &&
> - old_blob->length == new_blob->length)
> - return memcmp(old_blob->data, new_blob->data,
> - old_blob->length);
> -
> - return true;
> - }
> -
> - return false;
> -}
> -
> static int
> amdgpu_dm_connector_atomic_check(struct drm_connector *conn,
> struct drm_atomic_state *state)
> @@ -5960,7 +5941,7 @@ amdgpu_dm_connector_atomic_check(struct drm_connector *conn,
> if (!crtc)
> return 0;
>
> - if (is_hdr_metadata_different(old_con_state, new_con_state)) {
> + if (!drm_connector_atomic_hdr_metadata_equal(old_con_state, new_con_state)) {
> struct dc_info_packet hdr_infopacket;
>
> ret = fill_hdr_info_packet(new_con_state, &hdr_infopacket);
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index f24bbb840dbf..f871e33c2fc9 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -2395,21 +2395,6 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
> return ret;
> }
>
> -static bool hdr_metadata_equal(const struct drm_connector_state *old_state,
> - const struct drm_connector_state *new_state)
> -{
> - struct drm_property_blob *old_blob = old_state->hdr_output_metadata;
> - struct drm_property_blob *new_blob = new_state->hdr_output_metadata;
> -
> - if (!old_blob || !new_blob)
> - return old_blob == new_blob;
> -
> - if (old_blob->length != new_blob->length)
> - return false;
> -
> - return !memcmp(old_blob->data, new_blob->data, old_blob->length);
> -}
> -
> static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
> struct drm_atomic_state *state)
> {
> @@ -2423,7 +2408,7 @@ static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
> if (!crtc)
> return 0;
>
> - if (!hdr_metadata_equal(old_state, new_state)) {
> + if (!drm_connector_atomic_hdr_metadata_equal(old_state, new_state)) {
> crtc_state = drm_atomic_get_crtc_state(state, crtc);
> if (IS_ERR(crtc_state))
> return PTR_ERR(crtc_state);
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index e25248e23e18..d781a3a1e9bf 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -2170,6 +2170,34 @@ int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *conn
> }
> EXPORT_SYMBOL(drm_connector_attach_hdr_output_metadata_property);
>
> +/**
> + * drm_connector_atomic_hdr_metadata_equal - checks if the hdr metadata changed
> + * @old_state: old connector state to compare
> + * @new_state: new connector state to compare
> + *
> + * This is used by HDR-enabled drivers to test whether the HDR metadata
> + * have changed between two different connector state (and thus probably
> + * requires a full blown mode change).
> + *
> + * Returns:
> + * True if the metadata are equal, False otherwise
> + */
> +bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state,
> + struct drm_connector_state *new_state)
> +{
> + struct drm_property_blob *old_blob = old_state->hdr_output_metadata;
> + struct drm_property_blob *new_blob = new_state->hdr_output_metadata;
> +
> + if (!old_blob || !new_blob)
> + return old_blob == new_blob;
> +
> + if (old_blob->length != new_blob->length)
> + return false;
> +
> + return !memcmp(old_blob->data, new_blob->data, old_blob->length);
> +}
> +EXPORT_SYMBOL(drm_connector_atomic_hdr_metadata_equal);
> +
> /**
> * drm_connector_set_vrr_capable_property - sets the variable refresh rate
> * capable property for a connector
> diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
> index e00fdc47c0eb..efec9454af5a 100644
> --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> @@ -109,16 +109,6 @@ int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
> return -EINVAL;
> }
>
> -static bool blob_equal(const struct drm_property_blob *a,
> - const struct drm_property_blob *b)
> -{
> - if (a && b)
> - return a->length == b->length &&
> - !memcmp(a->data, b->data, a->length);
> -
> - return !a == !b;
> -}
> -
> int intel_digital_connector_atomic_check(struct drm_connector *conn,
> struct drm_atomic_state *state)
> {
> @@ -149,8 +139,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
> new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
> new_conn_state->base.content_type != old_conn_state->base.content_type ||
> new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode ||
> - !blob_equal(new_conn_state->base.hdr_output_metadata,
> - old_conn_state->base.hdr_output_metadata))
> + !drm_connector_atomic_hdr_metadata_equal(old_state, new_state))
> crtc_state->mode_changed = true;
>
> return 0;
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index 32172dab8427..1f51d73ca715 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -1672,6 +1672,8 @@ int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
> int drm_connector_attach_vrr_capable_property(
> struct drm_connector *connector);
> int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *connector);
> +bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state,
> + struct drm_connector_state *new_state);
> int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
> int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector);
> int drm_mode_create_dp_colorspace_property(struct drm_connector *connector);
>