Re: [v10 01/12] drm: Add HDR source metadata property

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>-----Original Message-----
>From: Ville Syrjälä [mailto:ville.syrjala@xxxxxxxxxxxxxxx]
>Sent: Thursday, May 16, 2019 12:40 AM
>To: Shankar, Uma <uma.shankar@xxxxxxxxx>
>Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx;
>maarten.lankhorst@xxxxxxxxxxxxxxx; Sharma, Shashank
><shashank.sharma@xxxxxxxxx>; emil.l.velikov@xxxxxxxxx; brian.starkey@xxxxxxx;
>dcastagna@xxxxxxxxxxxx; seanpaul@xxxxxxxxxxxx; Roper, Matthew D
><matthew.d.roper@xxxxxxxxx>; jonas@xxxxxxxxx
>Subject: Re: [v10 01/12] drm: Add HDR source metadata property
>
>On Tue, May 14, 2019 at 11:06:23PM +0530, Uma Shankar wrote:
>> This patch adds a blob property to get HDR metadata information from
>> userspace. This will be send as part of AVI Infoframe to panel.
>>
>> It also implements get() and set() functions for HDR output metadata
>> property.The blob data is received from userspace and saved in
>> connector state, the same is returned as blob in get property call to
>> userspace.
>>
>> v2: Rebase and modified the metadata structure elements as per Ville's
>> POC changes.
>>
>> v3: No Change
>>
>> v4: Addressed Shashank's review comments
>>
>> v5: Rebase.
>>
>> v6: Addressed Brian Starkey's review comments, defined new structure
>> with header for dynamic metadata scalability.
>> Merge get/set property functions for metadata in this patch.
>>
>> v7: Addressed Jonas Karlman review comments and defined separate
>> structure for infoframe to better align with CTA 861.G spec. Added
>> Shashank's RB.
>>
>> v8: Addressed Ville's review comments. Moved sink metadata structure
>> out of uapi headers as suggested by Jonas Karlman.
>>
>> v9: Rebase and addressed Jonas Karlman review comments.
>>
>> Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
>> Reviewed-by: Shashank Sharma <shashank.sharma@xxxxxxxxx>
>> ---
>>  drivers/gpu/drm/drm_atomic.c      |  2 ++
>>  drivers/gpu/drm/drm_atomic_uapi.c | 13 +++++++++++++
>>  drivers/gpu/drm/drm_connector.c   |  6 ++++++
>>  include/drm/drm_connector.h       | 11 +++++++++++
>>  include/drm/drm_mode_config.h     |  7 +++++++
>>  include/linux/hdmi.h              | 26 ++++++++++++++++++++++++++
>>  include/uapi/drm/drm_mode.h       | 23 +++++++++++++++++++++++
>>  7 files changed, 88 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/drm_atomic.c
>> b/drivers/gpu/drm/drm_atomic.c index f4924cb..0d27195 100644
>> --- a/drivers/gpu/drm/drm_atomic.c
>> +++ b/drivers/gpu/drm/drm_atomic.c
>> @@ -925,6 +925,8 @@ static void
>> drm_atomic_connector_print_state(struct drm_printer *p,
>>
>>  	drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector-
>>name);
>>  	drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name :
>> "(null)");
>> +	drm_printf(p, "\thdr_metadata_changed=%d\n",
>> +		   state->hdr_metadata_changed);
>>
>>  	if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
>>  		if (state->writeback_job && state->writeback_job->fb) diff --git
>> a/drivers/gpu/drm/drm_atomic_uapi.c
>> b/drivers/gpu/drm/drm_atomic_uapi.c
>> index 4131e66..4aa82c91 100644
>> --- a/drivers/gpu/drm/drm_atomic_uapi.c
>> +++ b/drivers/gpu/drm/drm_atomic_uapi.c
>> @@ -676,6 +676,8 @@ static int
>> drm_atomic_connector_set_property(struct drm_connector *connector,  {
>>  	struct drm_device *dev = connector->dev;
>>  	struct drm_mode_config *config = &dev->mode_config;
>> +	bool replaced = false;
>> +	int ret;
>>
>>  	if (property == config->prop_crtc_id) {
>>  		struct drm_crtc *crtc = drm_crtc_find(dev, file_priv, val); @@
>> -726,6 +728,14 @@ static int drm_atomic_connector_set_property(struct
>drm_connector *connector,
>>  		 */
>>  		if (state->link_status != DRM_LINK_STATUS_GOOD)
>>  			state->link_status = val;
>> +	} else if (property == config->hdr_output_metadata_property) {
>> +		ret = drm_atomic_replace_property_blob_from_id(dev,
>> +				&state->hdr_output_metadata,
>> +				val,
>> +				-1, sizeof(struct hdr_output_metadata),
>
>Those function arguments are nonsesne for a blob that isn't an array.

Hmm, just to clarify - Since this is a fixed struct being passed. We should make
ret = drm_atomic_replace_property_blob_from_id(dev,
				&state->hdr_output_metadata,
				val,
				sizeof(struct hdr_output_metadata), -1,
				&replaced);

Basically have check for expected_size rather expected_elem_size.
Hope this is what you meant.

>> +		state->hdr_metadata_changed |= replaced;
>> +		return ret;
>>  	} else if (property == config->aspect_ratio_property) {
>>  		state->picture_aspect_ratio = val;
>>  	} else if (property == config->content_type_property) { @@ -814,6
>> +824,9 @@ static int drm_atomic_connector_set_property(struct drm_connector
>*connector,
>>  		*val = state->colorspace;
>>  	} else if (property == connector->scaling_mode_property) {
>>  		*val = state->scaling_mode;
>> +	} else if (property == config->hdr_output_metadata_property) {
>> +		*val = state->hdr_output_metadata ?
>> +			state->hdr_output_metadata->base.id : 0;
>>  	} else if (property == config->content_protection_property) {
>>  		*val = state->content_protection;
>>  	} else if (property == config->writeback_fb_id_property) { diff
>> --git a/drivers/gpu/drm/drm_connector.c
>> b/drivers/gpu/drm/drm_connector.c index 11fcd25..c9ac8b9 100644
>> --- a/drivers/gpu/drm/drm_connector.c
>> +++ b/drivers/gpu/drm/drm_connector.c
>> @@ -1051,6 +1051,12 @@ int drm_connector_create_standard_properties(struct
>drm_device *dev)
>>  		return -ENOMEM;
>>  	dev->mode_config.non_desktop_property = prop;
>>
>> +	prop = drm_property_create(dev, DRM_MODE_PROP_BLOB,
>> +				   "HDR_OUTPUT_METADATA", 0);
>> +	if (!prop)
>> +		return -ENOMEM;
>> +	dev->mode_config.hdr_output_metadata_property = prop;
>> +
>>  	return 0;
>>  }
>>
>> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
>> index e257b87..54daa54 100644
>> --- a/include/drm/drm_connector.h
>> +++ b/include/drm/drm_connector.h
>> @@ -603,6 +603,13 @@ struct drm_connector_state {
>>  	 * and the connector bpc limitations obtained from edid.
>>  	 */
>>  	u8 max_bpc;
>> +
>> +	/**
>> +	 * @hdr_output_metadata:
>> +	 * DRM blob property for HDR output metadata
>> +	 */
>> +	struct drm_property_blob *hdr_output_metadata;
>> +	u8 hdr_metadata_changed : 1;
>
>I think the changed flag is now unused. Should be dropped if so.

Ok Sure, will drop this.

>>  };
>>
>>  /**
>> @@ -1237,6 +1244,10 @@ struct drm_connector {
>>  	 * &drm_mode_config.connector_free_work.
>>  	 */
>>  	struct llist_node free_node;
>> +
>> +	/* HDR metdata */
>> +	struct hdr_output_metadata hdr_output_metadata;
>> +	struct hdr_sink_metadata hdr_sink_metadata;
>>  };
>>
>>  #define obj_to_connector(x) container_of(x, struct drm_connector,
>> base) diff --git a/include/drm/drm_mode_config.h
>> b/include/drm/drm_mode_config.h index 5764ee3..58278cc 100644
>> --- a/include/drm/drm_mode_config.h
>> +++ b/include/drm/drm_mode_config.h
>> @@ -842,6 +842,13 @@ struct drm_mode_config {
>>  	 */
>>  	struct drm_property *content_protection_property;
>>
>> +	/**
>> +	 * hdr_output_metadata_property: Connector property containing hdr
>> +	 * metatda. This will be provided by userspace compositors based
>> +	 * on HDR content
>> +	 */
>> +	struct drm_property *hdr_output_metadata_property;
>> +
>>  	/* dumb ioctl parameters */
>>  	uint32_t preferred_depth, prefer_shadow;
>>
>> diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h index
>> 927ad64..6780476 100644
>> --- a/include/linux/hdmi.h
>> +++ b/include/linux/hdmi.h
>> @@ -152,6 +152,16 @@ enum hdmi_content_type {
>>  	HDMI_CONTENT_TYPE_GAME,
>>  };
>>
>> +enum hdmi_metadata_type {
>> +	HDMI_STATIC_METADATA_TYPE1 = 1,
>> +};
>> +
>> +enum hdmi_eotf {
>> +	HDMI_EOTF_TRADITIONAL_GAMMA_SDR,
>> +	HDMI_EOTF_TRADITIONAL_GAMMA_HDR,
>> +	HDMI_EOTF_SMPTE_ST2084,
>> +};
>> +
>>  struct hdmi_avi_infoframe {
>>  	enum hdmi_infoframe_type type;
>>  	unsigned char version;
>> @@ -320,6 +330,22 @@ struct hdmi_vendor_infoframe {
>>  	unsigned int s3d_ext_data;
>>  };
>>
>> +/* HDR Metadata as per 861.G spec */
>> +struct hdr_static_metadata {
>> +	__u8 eotf;
>> +	__u8 metadata_type;
>> +	__u16 max_cll;
>> +	__u16 max_fall;
>> +	__u16 min_cll;
>> +};
>> +
>> +struct hdr_sink_metadata {
>> +	__u32 metadata_type;
>> +	union {
>> +		struct hdr_static_metadata hdmi_type1;
>> +	};
>> +};
>> +
>>  int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame);
>> ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
>>  				   void *buffer, size_t size);
>> diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
>> index 83cd163..997a7e0 100644
>> --- a/include/uapi/drm/drm_mode.h
>> +++ b/include/uapi/drm/drm_mode.h
>> @@ -630,6 +630,29 @@ struct drm_color_lut {
>>  	__u16 reserved;
>>  };
>>
>> +/* HDR Metadata Infoframe as per 861.G spec */ struct
>> +hdr_metadata_infoframe {
>> +	__u8 eotf;
>> +	__u8 metadata_type;
>> +	struct {
>> +		__u16 x, y;
>> +		} display_primaries[3];
>> +	struct {
>> +		__u16 x, y;
>> +		} white_point;
>> +	__u16 max_display_mastering_luminance;
>> +	__u16 min_display_mastering_luminance;
>> +	__u16 max_cll;
>> +	__u16 max_fall;
>> +};
>> +
>> +struct hdr_output_metadata {
>> +	__u32 metadata_type;
>> +	union {
>> +		struct hdr_metadata_infoframe hdmi_metadata_type1;
>> +	};
>> +};
>> +
>>  #define DRM_MODE_PAGE_FLIP_EVENT 0x01  #define
>> DRM_MODE_PAGE_FLIP_ASYNC 0x02  #define
>> DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE 0x4
>> --
>> 1.9.1
>
>--
>Ville Syrjälä
>Intel
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