[v10,04/12] drm: Enable HDR infoframe support

Submitted by Shankar, Uma on May 14, 2019, 5:36 p.m.

Details

Message ID 1557855394-12214-5-git-send-email-uma.shankar@intel.com
State New
Headers show
Series "Add HDR Metadata Parsing and handling in DRM layer" ( rev: 10 ) in DRI devel

Commit Message

Shankar, Uma May 14, 2019, 5:36 p.m.
Enable Dynamic Range and Mastering Infoframe for HDR
content, which is defined in CEA 861.3 spec.

The metadata will be computed based on blending
policy in userspace compositors and passed as a connector
property blob to driver. The same will be sent as infoframe
to panel which support HDR.

Added the const version of infoframe for DRM metadata
for HDR.

v2: Rebase and added Ville's POC changes.

v3: No Change

v4: Addressed Shashank's review comments and merged the
patch making drm infoframe function arguments as constant.

v5: Rebase

v6: Fixed checkpatch warnings with --strict option. Addressed
Shashank's review comments and added his RB.

v7: Addressed Brian Starkey's review comments. Merged 2 patches
into one.

v8: Addressed Jonas Karlman review comments.

v9: Addressed Jonas Karlman review comments.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
---
 drivers/gpu/drm/drm_edid.c |  43 +++++++++++
 drivers/video/hdmi.c       | 187 +++++++++++++++++++++++++++++++++++++++++++++
 include/drm/drm_edid.h     |   5 ++
 include/linux/hdmi.h       |  27 +++++++
 4 files changed, 262 insertions(+)

Patch hide | download patch | download mbox

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 2e0b5be..73b7905 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -4903,6 +4903,49 @@  static bool is_hdmi2_sink(struct drm_connector *connector)
 }
 
 /**
+ * drm_hdmi_infoframe_set_hdr_metadata() - fill an HDMI DRM infoframe with
+ *                                         HDR metadata from userspace
+ * @frame: HDMI DRM infoframe
+ * @hdr_metadata: hdr_source_metadata info from userspace
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int
+drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame,
+				    const struct hdr_output_metadata *hdr_metadata)
+{
+	int err;
+
+	if (!frame || !hdr_metadata)
+		return -EINVAL;
+
+	err = hdmi_drm_infoframe_init(frame);
+	if (err < 0)
+		return err;
+
+	DRM_DEBUG_KMS("type = %x\n", frame->type);
+
+	frame->eotf = hdr_metadata->hdmi_metadata_type1.eotf;
+	frame->metadata_type = hdr_metadata->hdmi_metadata_type1.metadata_type;
+
+	memcpy(&frame->display_primaries,
+	       &hdr_metadata->hdmi_metadata_type1.display_primaries, 12);
+
+	memcpy(&frame->white_point,
+	       &hdr_metadata->hdmi_metadata_type1.white_point, 4);
+
+	frame->max_display_mastering_luminance =
+		hdr_metadata->hdmi_metadata_type1.max_display_mastering_luminance;
+	frame->min_display_mastering_luminance =
+		hdr_metadata->hdmi_metadata_type1.min_display_mastering_luminance;
+	frame->max_fall = hdr_metadata->hdmi_metadata_type1.max_fall;
+	frame->max_cll = hdr_metadata->hdmi_metadata_type1.max_cll;
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_hdmi_infoframe_set_hdr_metadata);
+
+/**
  * drm_hdmi_avi_infoframe_from_display_mode() - fill an HDMI AVI infoframe with
  *                                              data from a DRM display mode
  * @frame: HDMI AVI infoframe
diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
index 799ae49..c5ecd16 100644
--- a/drivers/video/hdmi.c
+++ b/drivers/video/hdmi.c
@@ -650,6 +650,147 @@  ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
 	return 0;
 }
 
+/**
+ * hdmi_drm_infoframe_init() - initialize an HDMI Dynaminc Range and
+ * mastering infoframe
+ * @frame: HDMI DRM infoframe
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame)
+{
+	memset(frame, 0, sizeof(*frame));
+
+	frame->type = HDMI_INFOFRAME_TYPE_DRM;
+	frame->version = 1;
+	frame->length = HDMI_DRM_INFOFRAME_SIZE;
+
+	return 0;
+}
+EXPORT_SYMBOL(hdmi_drm_infoframe_init);
+
+static int hdmi_drm_infoframe_check_only(const struct hdmi_drm_infoframe *frame)
+{
+	if (frame->type != HDMI_INFOFRAME_TYPE_DRM ||
+	    frame->version != 1)
+		return -EINVAL;
+
+	return 0;
+}
+
+/**
+ * hdmi_drm_infoframe_check() - check a HDMI DRM infoframe
+ * @frame: HDMI DRM infoframe
+ *
+ * Validates that the infoframe is consistent.
+ * Returns 0 on success or a negative error code on failure.
+ */
+int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame)
+{
+	return hdmi_drm_infoframe_check_only(frame);
+}
+EXPORT_SYMBOL(hdmi_drm_infoframe_check);
+
+/**
+ * hdmi_drm_infoframe_pack_only() - write HDMI DRM infoframe to binary buffer
+ * @frame: HDMI DRM infoframe
+ * @buffer: destination buffer
+ * @size: size of buffer
+ *
+ * Packs the information contained in the @frame structure into a binary
+ * representation that can be written into the corresponding controller
+ * registers. Also computes the checksum as required by section 5.3.5 of
+ * the HDMI 1.4 specification.
+ *
+ * Returns the number of bytes packed into the binary buffer or a negative
+ * error code on failure.
+ */
+ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
+				     void *buffer, size_t size)
+{
+	u8 *ptr = buffer;
+	size_t length;
+	int i;
+
+	length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
+
+	if (size < length)
+		return -ENOSPC;
+
+	memset(buffer, 0, size);
+
+	ptr[0] = frame->type;
+	ptr[1] = frame->version;
+	ptr[2] = frame->length;
+	ptr[3] = 0; /* checksum */
+
+	/* start infoframe payload */
+	ptr += HDMI_INFOFRAME_HEADER_SIZE;
+
+	*ptr++ = frame->eotf;
+	*ptr++ = frame->metadata_type;
+
+	for (i = 0; i < 3; i++) {
+		*ptr++ = frame->display_primaries[i].x;
+		*ptr++ = frame->display_primaries[i].x >> 8;
+		*ptr++ = frame->display_primaries[i].y;
+		*ptr++ = frame->display_primaries[i].y >> 8;
+	}
+
+	*ptr++ = frame->white_point.x;
+	*ptr++ = frame->white_point.x >> 8;
+
+	*ptr++ = frame->white_point.y;
+	*ptr++ = frame->white_point.y >> 8;
+
+	*ptr++ = frame->max_display_mastering_luminance;
+	*ptr++ = frame->max_display_mastering_luminance >> 8;
+
+	*ptr++ = frame->min_display_mastering_luminance;
+	*ptr++ = frame->min_display_mastering_luminance >> 8;
+
+	*ptr++ = frame->max_cll;
+	*ptr++ = frame->max_cll >> 8;
+
+	*ptr++ = frame->max_fall;
+	*ptr++ = frame->max_fall >> 8;
+
+	hdmi_infoframe_set_checksum(buffer, length);
+
+	return length;
+}
+EXPORT_SYMBOL(hdmi_drm_infoframe_pack_only);
+
+/**
+ * hdmi_drm_infoframe_pack() - check a HDMI DRM infoframe,
+ *                             and write it to binary buffer
+ * @frame: HDMI DRM infoframe
+ * @buffer: destination buffer
+ * @size: size of buffer
+ *
+ * Validates that the infoframe is consistent and updates derived fields
+ * (eg. length) based on other fields, after which it packs the information
+ * contained in the @frame structure into a binary representation that
+ * can be written into the corresponding controller registers. This function
+ * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
+ * specification.
+ *
+ * Returns the number of bytes packed into the binary buffer or a negative
+ * error code on failure.
+ */
+ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame,
+				void *buffer, size_t size)
+{
+	int ret;
+
+	ret = hdmi_drm_infoframe_check(frame);
+	if (ret)
+		return ret;
+
+	return hdmi_drm_infoframe_pack_only(frame, buffer, size);
+}
+EXPORT_SYMBOL(hdmi_drm_infoframe_pack);
+
 /*
  * hdmi_vendor_any_infoframe_check() - check a vendor infoframe
  */
@@ -758,6 +899,10 @@  ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
 		length = hdmi_avi_infoframe_pack_only(&frame->avi,
 						      buffer, size);
 		break;
+	case HDMI_INFOFRAME_TYPE_DRM:
+		length = hdmi_drm_infoframe_pack_only(&frame->drm,
+						      buffer, size);
+		break;
 	case HDMI_INFOFRAME_TYPE_SPD:
 		length = hdmi_spd_infoframe_pack_only(&frame->spd,
 						      buffer, size);
@@ -806,6 +951,9 @@  ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
 	case HDMI_INFOFRAME_TYPE_AVI:
 		length = hdmi_avi_infoframe_pack(&frame->avi, buffer, size);
 		break;
+	case HDMI_INFOFRAME_TYPE_DRM:
+		length = hdmi_drm_infoframe_pack(&frame->drm, buffer, size);
+		break;
 	case HDMI_INFOFRAME_TYPE_SPD:
 		length = hdmi_spd_infoframe_pack(&frame->spd, buffer, size);
 		break;
@@ -838,6 +986,8 @@  static const char *hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type)
 		return "Source Product Description (SPD)";
 	case HDMI_INFOFRAME_TYPE_AUDIO:
 		return "Audio";
+	case HDMI_INFOFRAME_TYPE_DRM:
+		return "Dynamic Range and Mastering";
 	}
 	return "Reserved";
 }
@@ -1284,6 +1434,40 @@  static void hdmi_audio_infoframe_log(const char *level,
 			frame->downmix_inhibit ? "Yes" : "No");
 }
 
+/**
+ * hdmi_drm_infoframe_log() - log info of HDMI DRM infoframe
+ * @level: logging level
+ * @dev: device
+ * @frame: HDMI DRM infoframe
+ */
+static void hdmi_drm_infoframe_log(const char *level,
+				   struct device *dev,
+				   const struct hdmi_drm_infoframe *frame)
+{
+	int i;
+
+	hdmi_infoframe_log_header(level, dev,
+				  (struct hdmi_any_infoframe *)frame);
+	hdmi_log("length: %d\n", frame->length);
+	hdmi_log("metadata type: %d\n", frame->metadata_type);
+	hdmi_log("eotf: %d\n", frame->eotf);
+	for (i = 0; i < 3; i++) {
+		hdmi_log("x[%d]: %d\n", i, frame->display_primaries[i].x);
+		hdmi_log("y[%d]: %d\n", i, frame->display_primaries[i].y);
+	}
+
+	hdmi_log("white point x: %d\n", frame->white_point.x);
+	hdmi_log("white point y: %d\n", frame->white_point.y);
+
+	hdmi_log("max_display_mastering_luminance: %d\n",
+		 frame->max_display_mastering_luminance);
+	hdmi_log("min_display_mastering_luminance: %d\n",
+		 frame->min_display_mastering_luminance);
+
+	hdmi_log("max_cll: %d\n", frame->max_cll);
+	hdmi_log("max_fall: %d\n", frame->max_fall);
+}
+
 static const char *
 hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)
 {
@@ -1372,6 +1556,9 @@  void hdmi_infoframe_log(const char *level,
 	case HDMI_INFOFRAME_TYPE_VENDOR:
 		hdmi_vendor_any_infoframe_log(level, dev, &frame->vendor);
 		break;
+	case HDMI_INFOFRAME_TYPE_DRM:
+		hdmi_drm_infoframe_log(level, dev, &frame->drm);
+		break;
 	}
 }
 EXPORT_SYMBOL(hdmi_infoframe_log);
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 9d3b5b9..4ba56f5 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -25,6 +25,7 @@ 
 
 #include <linux/types.h>
 #include <linux/hdmi.h>
+#include <drm/drm_mode.h>
 
 struct drm_device;
 struct i2c_adapter;
@@ -370,6 +371,10 @@  int drm_av_sync_delay(struct drm_connector *connector,
 				   const struct drm_display_mode *mode,
 				   enum hdmi_quantization_range rgb_quant_range);
 
+int
+drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame,
+				    const struct hdr_output_metadata *hdr_metadata);
+
 /**
  * drm_eld_mnl - Get ELD monitor name length in bytes.
  * @eld: pointer to an eld memory structure with mnl set
diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
index 6780476..7edafcf 100644
--- a/include/linux/hdmi.h
+++ b/include/linux/hdmi.h
@@ -47,6 +47,7 @@  enum hdmi_infoframe_type {
 	HDMI_INFOFRAME_TYPE_AVI = 0x82,
 	HDMI_INFOFRAME_TYPE_SPD = 0x83,
 	HDMI_INFOFRAME_TYPE_AUDIO = 0x84,
+	HDMI_INFOFRAME_TYPE_DRM = 0x87,
 };
 
 #define HDMI_IEEE_OUI 0x000c03
@@ -185,12 +186,37 @@  struct hdmi_avi_infoframe {
 	unsigned short right_bar;
 };
 
+/* DRM Infoframe as per CTA 861.G spec */
+struct hdmi_drm_infoframe {
+	enum hdmi_infoframe_type type;
+	unsigned char version;
+	unsigned char length;
+	enum hdmi_eotf eotf;
+	enum hdmi_metadata_type 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;
+};
+
 int hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame);
 ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, void *buffer,
 				size_t size);
 ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame,
 				     void *buffer, size_t size);
 int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame);
+int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame);
+ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame, void *buffer,
+				size_t size);
+ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
+				     void *buffer, size_t size);
+int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame);
 
 enum hdmi_spd_sdi {
 	HDMI_SPD_SDI_UNKNOWN,
@@ -381,6 +407,7 @@  ssize_t hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe *fram
 	struct hdmi_spd_infoframe spd;
 	union hdmi_vendor_any_infoframe vendor;
 	struct hdmi_audio_infoframe audio;
+	struct hdmi_drm_infoframe drm;
 };
 
 ssize_t hdmi_infoframe_pack(union hdmi_infoframe *frame, void *buffer,

Comments

On Tue, May 14, 2019 at 11:06:26PM +0530, Uma Shankar wrote:
> Enable Dynamic Range and Mastering Infoframe for HDR
> content, which is defined in CEA 861.3 spec.
> 
> The metadata will be computed based on blending
> policy in userspace compositors and passed as a connector
> property blob to driver. The same will be sent as infoframe
> to panel which support HDR.
> 
> Added the const version of infoframe for DRM metadata
> for HDR.
> 
> v2: Rebase and added Ville's POC changes.
> 
> v3: No Change
> 
> v4: Addressed Shashank's review comments and merged the
> patch making drm infoframe function arguments as constant.
> 
> v5: Rebase
> 
> v6: Fixed checkpatch warnings with --strict option. Addressed
> Shashank's review comments and added his RB.
> 
> v7: Addressed Brian Starkey's review comments. Merged 2 patches
> into one.
> 
> v8: Addressed Jonas Karlman review comments.
> 
> v9: Addressed Jonas Karlman review comments.
> 
> Signed-off-by: Uma Shankar <uma.shankar@intel.com>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
> ---
>  drivers/gpu/drm/drm_edid.c |  43 +++++++++++
>  drivers/video/hdmi.c       | 187 +++++++++++++++++++++++++++++++++++++++++++++
>  include/drm/drm_edid.h     |   5 ++
>  include/linux/hdmi.h       |  27 +++++++
>  4 files changed, 262 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 2e0b5be..73b7905 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -4903,6 +4903,49 @@ static bool is_hdmi2_sink(struct drm_connector *connector)
>  }
>  
>  /**
> + * drm_hdmi_infoframe_set_hdr_metadata() - fill an HDMI DRM infoframe with
> + *                                         HDR metadata from userspace
> + * @frame: HDMI DRM infoframe
> + * @hdr_metadata: hdr_source_metadata info from userspace
> + *
> + * Return: 0 on success or a negative error code on failure.
> + */
> +int
> +drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame,
> +				    const struct hdr_output_metadata *hdr_metadata)
> +{
> +	int err;
> +
> +	if (!frame || !hdr_metadata)
> +		return -EINVAL;
> +
> +	err = hdmi_drm_infoframe_init(frame);
> +	if (err < 0)
> +		return err;
> +
> +	DRM_DEBUG_KMS("type = %x\n", frame->type);

This debug seems pointless.

> +
> +	frame->eotf = hdr_metadata->hdmi_metadata_type1.eotf;
> +	frame->metadata_type = hdr_metadata->hdmi_metadata_type1.metadata_type;
> +
> +	memcpy(&frame->display_primaries,
> +	       &hdr_metadata->hdmi_metadata_type1.display_primaries, 12);

sizeof() can be used here.

Could also slap on a BUILD_BUG_ON() to make sure both are the same size.

> +
> +	memcpy(&frame->white_point,
> +	       &hdr_metadata->hdmi_metadata_type1.white_point, 4);

ditto.

> +
> +	frame->max_display_mastering_luminance =
> +		hdr_metadata->hdmi_metadata_type1.max_display_mastering_luminance;
> +	frame->min_display_mastering_luminance =
> +		hdr_metadata->hdmi_metadata_type1.min_display_mastering_luminance;
> +	frame->max_fall = hdr_metadata->hdmi_metadata_type1.max_fall;
> +	frame->max_cll = hdr_metadata->hdmi_metadata_type1.max_cll;
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL(drm_hdmi_infoframe_set_hdr_metadata);
> +
> +/**
>   * drm_hdmi_avi_infoframe_from_display_mode() - fill an HDMI AVI infoframe with
>   *                                              data from a DRM display mode
>   * @frame: HDMI AVI infoframe
> diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
> index 799ae49..c5ecd16 100644
> --- a/drivers/video/hdmi.c
> +++ b/drivers/video/hdmi.c
> @@ -650,6 +650,147 @@ ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
>  	return 0;
>  }
>  
> +/**
> + * hdmi_drm_infoframe_init() - initialize an HDMI Dynaminc Range and
> + * mastering infoframe
> + * @frame: HDMI DRM infoframe
> + *
> + * Returns 0 on success or a negative error code on failure.
> + */
> +int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame)
> +{
> +	memset(frame, 0, sizeof(*frame));
> +
> +	frame->type = HDMI_INFOFRAME_TYPE_DRM;
> +	frame->version = 1;
> +	frame->length = HDMI_DRM_INFOFRAME_SIZE;
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL(hdmi_drm_infoframe_init);
> +
> +static int hdmi_drm_infoframe_check_only(const struct hdmi_drm_infoframe *frame)
> +{
> +	if (frame->type != HDMI_INFOFRAME_TYPE_DRM ||
> +	    frame->version != 1)

Missing the length check.

> +		return -EINVAL;
> +
> +	return 0;
> +}
> +
> +/**
> + * hdmi_drm_infoframe_check() - check a HDMI DRM infoframe
> + * @frame: HDMI DRM infoframe
> + *
> + * Validates that the infoframe is consistent.
> + * Returns 0 on success or a negative error code on failure.
> + */
> +int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame)
> +{
> +	return hdmi_drm_infoframe_check_only(frame);
> +}
> +EXPORT_SYMBOL(hdmi_drm_infoframe_check);
> +
> +/**
> + * hdmi_drm_infoframe_pack_only() - write HDMI DRM infoframe to binary buffer
> + * @frame: HDMI DRM infoframe
> + * @buffer: destination buffer
> + * @size: size of buffer
> + *
> + * Packs the information contained in the @frame structure into a binary
> + * representation that can be written into the corresponding controller
> + * registers. Also computes the checksum as required by section 5.3.5 of
> + * the HDMI 1.4 specification.
> + *
> + * Returns the number of bytes packed into the binary buffer or a negative
> + * error code on failure.
> + */
> +ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
> +				     void *buffer, size_t size)
> +{
> +	u8 *ptr = buffer;
> +	size_t length;
> +	int i;
> +
> +	length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
> +
> +	if (size < length)
> +		return -ENOSPC;
> +
> +	memset(buffer, 0, size);
> +
> +	ptr[0] = frame->type;
> +	ptr[1] = frame->version;
> +	ptr[2] = frame->length;
> +	ptr[3] = 0; /* checksum */
> +
> +	/* start infoframe payload */
> +	ptr += HDMI_INFOFRAME_HEADER_SIZE;
> +
> +	*ptr++ = frame->eotf;
> +	*ptr++ = frame->metadata_type;
> +
> +	for (i = 0; i < 3; i++) {
> +		*ptr++ = frame->display_primaries[i].x;
> +		*ptr++ = frame->display_primaries[i].x >> 8;
> +		*ptr++ = frame->display_primaries[i].y;
> +		*ptr++ = frame->display_primaries[i].y >> 8;
> +	}
> +
> +	*ptr++ = frame->white_point.x;
> +	*ptr++ = frame->white_point.x >> 8;
> +
> +	*ptr++ = frame->white_point.y;
> +	*ptr++ = frame->white_point.y >> 8;
> +
> +	*ptr++ = frame->max_display_mastering_luminance;
> +	*ptr++ = frame->max_display_mastering_luminance >> 8;
> +
> +	*ptr++ = frame->min_display_mastering_luminance;
> +	*ptr++ = frame->min_display_mastering_luminance >> 8;
> +
> +	*ptr++ = frame->max_cll;
> +	*ptr++ = frame->max_cll >> 8;
> +
> +	*ptr++ = frame->max_fall;
> +	*ptr++ = frame->max_fall >> 8;
> +
> +	hdmi_infoframe_set_checksum(buffer, length);
> +
> +	return length;
> +}
> +EXPORT_SYMBOL(hdmi_drm_infoframe_pack_only);
> +
> +/**
> + * hdmi_drm_infoframe_pack() - check a HDMI DRM infoframe,
> + *                             and write it to binary buffer
> + * @frame: HDMI DRM infoframe
> + * @buffer: destination buffer
> + * @size: size of buffer
> + *
> + * Validates that the infoframe is consistent and updates derived fields
> + * (eg. length) based on other fields, after which it packs the information
> + * contained in the @frame structure into a binary representation that
> + * can be written into the corresponding controller registers. This function
> + * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
> + * specification.
> + *
> + * Returns the number of bytes packed into the binary buffer or a negative
> + * error code on failure.
> + */
> +ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame,
> +				void *buffer, size_t size)
> +{
> +	int ret;
> +
> +	ret = hdmi_drm_infoframe_check(frame);
> +	if (ret)
> +		return ret;
> +
> +	return hdmi_drm_infoframe_pack_only(frame, buffer, size);
> +}
> +EXPORT_SYMBOL(hdmi_drm_infoframe_pack);
> +
>  /*
>   * hdmi_vendor_any_infoframe_check() - check a vendor infoframe
>   */
> @@ -758,6 +899,10 @@ ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
>  		length = hdmi_avi_infoframe_pack_only(&frame->avi,
>  						      buffer, size);
>  		break;
> +	case HDMI_INFOFRAME_TYPE_DRM:
> +		length = hdmi_drm_infoframe_pack_only(&frame->drm,
> +						      buffer, size);
> +		break;
>  	case HDMI_INFOFRAME_TYPE_SPD:
>  		length = hdmi_spd_infoframe_pack_only(&frame->spd,
>  						      buffer, size);
> @@ -806,6 +951,9 @@ ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
>  	case HDMI_INFOFRAME_TYPE_AVI:
>  		length = hdmi_avi_infoframe_pack(&frame->avi, buffer, size);
>  		break;
> +	case HDMI_INFOFRAME_TYPE_DRM:
> +		length = hdmi_drm_infoframe_pack(&frame->drm, buffer, size);
> +		break;
>  	case HDMI_INFOFRAME_TYPE_SPD:
>  		length = hdmi_spd_infoframe_pack(&frame->spd, buffer, size);
>  		break;
> @@ -838,6 +986,8 @@ static const char *hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type)
>  		return "Source Product Description (SPD)";
>  	case HDMI_INFOFRAME_TYPE_AUDIO:
>  		return "Audio";
> +	case HDMI_INFOFRAME_TYPE_DRM:
> +		return "Dynamic Range and Mastering";
>  	}
>  	return "Reserved";
>  }
> @@ -1284,6 +1434,40 @@ static void hdmi_audio_infoframe_log(const char *level,
>  			frame->downmix_inhibit ? "Yes" : "No");
>  }
>  
> +/**
> + * hdmi_drm_infoframe_log() - log info of HDMI DRM infoframe
> + * @level: logging level
> + * @dev: device
> + * @frame: HDMI DRM infoframe
> + */
> +static void hdmi_drm_infoframe_log(const char *level,
> +				   struct device *dev,
> +				   const struct hdmi_drm_infoframe *frame)
> +{
> +	int i;
> +
> +	hdmi_infoframe_log_header(level, dev,
> +				  (struct hdmi_any_infoframe *)frame);
> +	hdmi_log("length: %d\n", frame->length);
> +	hdmi_log("metadata type: %d\n", frame->metadata_type);
> +	hdmi_log("eotf: %d\n", frame->eotf);
> +	for (i = 0; i < 3; i++) {
> +		hdmi_log("x[%d]: %d\n", i, frame->display_primaries[i].x);
> +		hdmi_log("y[%d]: %d\n", i, frame->display_primaries[i].y);
> +	}
> +
> +	hdmi_log("white point x: %d\n", frame->white_point.x);
> +	hdmi_log("white point y: %d\n", frame->white_point.y);
> +
> +	hdmi_log("max_display_mastering_luminance: %d\n",
> +		 frame->max_display_mastering_luminance);
> +	hdmi_log("min_display_mastering_luminance: %d\n",
> +		 frame->min_display_mastering_luminance);
> +
> +	hdmi_log("max_cll: %d\n", frame->max_cll);
> +	hdmi_log("max_fall: %d\n", frame->max_fall);
> +}
> +
>  static const char *
>  hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)
>  {
> @@ -1372,6 +1556,9 @@ void hdmi_infoframe_log(const char *level,
>  	case HDMI_INFOFRAME_TYPE_VENDOR:
>  		hdmi_vendor_any_infoframe_log(level, dev, &frame->vendor);
>  		break;
> +	case HDMI_INFOFRAME_TYPE_DRM:
> +		hdmi_drm_infoframe_log(level, dev, &frame->drm);
> +		break;
>  	}
>  }
>  EXPORT_SYMBOL(hdmi_infoframe_log);
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index 9d3b5b9..4ba56f5 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -25,6 +25,7 @@
>  
>  #include <linux/types.h>
>  #include <linux/hdmi.h>
> +#include <drm/drm_mode.h>
>  
>  struct drm_device;
>  struct i2c_adapter;
> @@ -370,6 +371,10 @@ int drm_av_sync_delay(struct drm_connector *connector,
>  				   const struct drm_display_mode *mode,
>  				   enum hdmi_quantization_range rgb_quant_range);
>  
> +int
> +drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame,
> +				    const struct hdr_output_metadata *hdr_metadata);
> +
>  /**
>   * drm_eld_mnl - Get ELD monitor name length in bytes.
>   * @eld: pointer to an eld memory structure with mnl set
> diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
> index 6780476..7edafcf 100644
> --- a/include/linux/hdmi.h
> +++ b/include/linux/hdmi.h
> @@ -47,6 +47,7 @@ enum hdmi_infoframe_type {
>  	HDMI_INFOFRAME_TYPE_AVI = 0x82,
>  	HDMI_INFOFRAME_TYPE_SPD = 0x83,
>  	HDMI_INFOFRAME_TYPE_AUDIO = 0x84,
> +	HDMI_INFOFRAME_TYPE_DRM = 0x87,
>  };
>  
>  #define HDMI_IEEE_OUI 0x000c03
> @@ -185,12 +186,37 @@ struct hdmi_avi_infoframe {
>  	unsigned short right_bar;
>  };
>  
> +/* DRM Infoframe as per CTA 861.G spec */
> +struct hdmi_drm_infoframe {
> +	enum hdmi_infoframe_type type;
> +	unsigned char version;
> +	unsigned char length;
> +	enum hdmi_eotf eotf;
> +	enum hdmi_metadata_type 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;
> +};
> +
>  int hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame);
>  ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, void *buffer,
>  				size_t size);
>  ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame,
>  				     void *buffer, size_t size);
>  int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame);
> +int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame);
> +ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame, void *buffer,
> +				size_t size);
> +ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
> +				     void *buffer, size_t size);
> +int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame);
>  
>  enum hdmi_spd_sdi {
>  	HDMI_SPD_SDI_UNKNOWN,
> @@ -381,6 +407,7 @@ ssize_t hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe *fram
>  	struct hdmi_spd_infoframe spd;
>  	union hdmi_vendor_any_infoframe vendor;
>  	struct hdmi_audio_infoframe audio;
> +	struct hdmi_drm_infoframe drm;
>  };
>  
>  ssize_t hdmi_infoframe_pack(union hdmi_infoframe *frame, void *buffer,
> -- 
> 1.9.1
>-----Original Message-----
>From: Ville Syrjälä [mailto:ville.syrjala@linux.intel.com]
>Sent: Thursday, May 16, 2019 12:45 AM
>To: Shankar, Uma <uma.shankar@intel.com>
>Cc: intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org;
>maarten.lankhorst@linux.intel.com; Sharma, Shashank
><shashank.sharma@intel.com>; emil.l.velikov@gmail.com; brian.starkey@arm.com;
>dcastagna@chromium.org; seanpaul@chromium.org; Roper, Matthew D
><matthew.d.roper@intel.com>; jonas@kwiboo.se
>Subject: Re: [v10 04/12] drm: Enable HDR infoframe support
>
>On Tue, May 14, 2019 at 11:06:26PM +0530, Uma Shankar wrote:
>> Enable Dynamic Range and Mastering Infoframe for HDR content, which is
>> defined in CEA 861.3 spec.
>>
>> The metadata will be computed based on blending policy in userspace
>> compositors and passed as a connector property blob to driver. The
>> same will be sent as infoframe to panel which support HDR.
>>
>> Added the const version of infoframe for DRM metadata for HDR.
>>
>> v2: Rebase and added Ville's POC changes.
>>
>> v3: No Change
>>
>> v4: Addressed Shashank's review comments and merged the patch making
>> drm infoframe function arguments as constant.
>>
>> v5: Rebase
>>
>> v6: Fixed checkpatch warnings with --strict option. Addressed
>> Shashank's review comments and added his RB.
>>
>> v7: Addressed Brian Starkey's review comments. Merged 2 patches into
>> one.
>>
>> v8: Addressed Jonas Karlman review comments.
>>
>> v9: Addressed Jonas Karlman review comments.
>>
>> Signed-off-by: Uma Shankar <uma.shankar@intel.com>
>> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
>> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
>> ---
>>  drivers/gpu/drm/drm_edid.c |  43 +++++++++++
>>  drivers/video/hdmi.c       | 187
>+++++++++++++++++++++++++++++++++++++++++++++
>>  include/drm/drm_edid.h     |   5 ++
>>  include/linux/hdmi.h       |  27 +++++++
>>  4 files changed, 262 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
>> index 2e0b5be..73b7905 100644
>> --- a/drivers/gpu/drm/drm_edid.c
>> +++ b/drivers/gpu/drm/drm_edid.c
>> @@ -4903,6 +4903,49 @@ static bool is_hdmi2_sink(struct drm_connector
>> *connector)  }
>>
>>  /**
>> + * drm_hdmi_infoframe_set_hdr_metadata() - fill an HDMI DRM infoframe with
>> + *                                         HDR metadata from userspace
>> + * @frame: HDMI DRM infoframe
>> + * @hdr_metadata: hdr_source_metadata info from userspace
>> + *
>> + * Return: 0 on success or a negative error code on failure.
>> + */
>> +int
>> +drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame,
>> +				    const struct hdr_output_metadata
>*hdr_metadata) {
>> +	int err;
>> +
>> +	if (!frame || !hdr_metadata)
>> +		return -EINVAL;
>> +
>> +	err = hdmi_drm_infoframe_init(frame);
>> +	if (err < 0)
>> +		return err;
>> +
>> +	DRM_DEBUG_KMS("type = %x\n", frame->type);
>
>This debug seems pointless.

Ok, will drop this.

>> +
>> +	frame->eotf = hdr_metadata->hdmi_metadata_type1.eotf;
>> +	frame->metadata_type =
>> +hdr_metadata->hdmi_metadata_type1.metadata_type;
>> +
>> +	memcpy(&frame->display_primaries,
>> +	       &hdr_metadata->hdmi_metadata_type1.display_primaries, 12);
>
>sizeof() can be used here.

Sure.

>Could also slap on a BUILD_BUG_ON() to make sure both are the same size.

Ok, will addd it.

>
>> +
>> +	memcpy(&frame->white_point,
>> +	       &hdr_metadata->hdmi_metadata_type1.white_point, 4);
>
>ditto.

Sure.

>> +
>> +	frame->max_display_mastering_luminance =
>> +		hdr_metadata-
>>hdmi_metadata_type1.max_display_mastering_luminance;
>> +	frame->min_display_mastering_luminance =
>> +		hdr_metadata-
>>hdmi_metadata_type1.min_display_mastering_luminance;
>> +	frame->max_fall = hdr_metadata->hdmi_metadata_type1.max_fall;
>> +	frame->max_cll = hdr_metadata->hdmi_metadata_type1.max_cll;
>> +
>> +	return 0;
>> +}
>> +EXPORT_SYMBOL(drm_hdmi_infoframe_set_hdr_metadata);
>> +
>> +/**
>>   * drm_hdmi_avi_infoframe_from_display_mode() - fill an HDMI AVI infoframe with
>>   *                                              data from a DRM display mode
>>   * @frame: HDMI AVI infoframe
>> diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c index
>> 799ae49..c5ecd16 100644
>> --- a/drivers/video/hdmi.c
>> +++ b/drivers/video/hdmi.c
>> @@ -650,6 +650,147 @@ ssize_t hdmi_vendor_infoframe_pack(struct
>hdmi_vendor_infoframe *frame,
>>  	return 0;
>>  }
>>
>> +/**
>> + * hdmi_drm_infoframe_init() - initialize an HDMI Dynaminc Range and
>> + * mastering infoframe
>> + * @frame: HDMI DRM infoframe
>> + *
>> + * Returns 0 on success or a negative error code on failure.
>> + */
>> +int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame) {
>> +	memset(frame, 0, sizeof(*frame));
>> +
>> +	frame->type = HDMI_INFOFRAME_TYPE_DRM;
>> +	frame->version = 1;
>> +	frame->length = HDMI_DRM_INFOFRAME_SIZE;
>> +
>> +	return 0;
>> +}
>> +EXPORT_SYMBOL(hdmi_drm_infoframe_init);
>> +
>> +static int hdmi_drm_infoframe_check_only(const struct
>> +hdmi_drm_infoframe *frame) {
>> +	if (frame->type != HDMI_INFOFRAME_TYPE_DRM ||
>> +	    frame->version != 1)
>
>Missing the length check.
>
>> +		return -EINVAL;
>> +
>> +	return 0;
>> +}
>> +
>> +/**
>> + * hdmi_drm_infoframe_check() - check a HDMI DRM infoframe
>> + * @frame: HDMI DRM infoframe
>> + *
>> + * Validates that the infoframe is consistent.
>> + * Returns 0 on success or a negative error code on failure.
>> + */
>> +int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame) {
>> +	return hdmi_drm_infoframe_check_only(frame);
>> +}
>> +EXPORT_SYMBOL(hdmi_drm_infoframe_check);
>> +
>> +/**
>> + * hdmi_drm_infoframe_pack_only() - write HDMI DRM infoframe to
>> +binary buffer
>> + * @frame: HDMI DRM infoframe
>> + * @buffer: destination buffer
>> + * @size: size of buffer
>> + *
>> + * Packs the information contained in the @frame structure into a
>> +binary
>> + * representation that can be written into the corresponding
>> +controller
>> + * registers. Also computes the checksum as required by section 5.3.5
>> +of
>> + * the HDMI 1.4 specification.
>> + *
>> + * Returns the number of bytes packed into the binary buffer or a
>> +negative
>> + * error code on failure.
>> + */
>> +ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
>> +				     void *buffer, size_t size)
>> +{
>> +	u8 *ptr = buffer;
>> +	size_t length;
>> +	int i;
>> +
>> +	length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
>> +
>> +	if (size < length)
>> +		return -ENOSPC;
>> +
>> +	memset(buffer, 0, size);
>> +
>> +	ptr[0] = frame->type;
>> +	ptr[1] = frame->version;
>> +	ptr[2] = frame->length;
>> +	ptr[3] = 0; /* checksum */
>> +
>> +	/* start infoframe payload */
>> +	ptr += HDMI_INFOFRAME_HEADER_SIZE;
>> +
>> +	*ptr++ = frame->eotf;
>> +	*ptr++ = frame->metadata_type;
>> +
>> +	for (i = 0; i < 3; i++) {
>> +		*ptr++ = frame->display_primaries[i].x;
>> +		*ptr++ = frame->display_primaries[i].x >> 8;
>> +		*ptr++ = frame->display_primaries[i].y;
>> +		*ptr++ = frame->display_primaries[i].y >> 8;
>> +	}
>> +
>> +	*ptr++ = frame->white_point.x;
>> +	*ptr++ = frame->white_point.x >> 8;
>> +
>> +	*ptr++ = frame->white_point.y;
>> +	*ptr++ = frame->white_point.y >> 8;
>> +
>> +	*ptr++ = frame->max_display_mastering_luminance;
>> +	*ptr++ = frame->max_display_mastering_luminance >> 8;
>> +
>> +	*ptr++ = frame->min_display_mastering_luminance;
>> +	*ptr++ = frame->min_display_mastering_luminance >> 8;
>> +
>> +	*ptr++ = frame->max_cll;
>> +	*ptr++ = frame->max_cll >> 8;
>> +
>> +	*ptr++ = frame->max_fall;
>> +	*ptr++ = frame->max_fall >> 8;
>> +
>> +	hdmi_infoframe_set_checksum(buffer, length);
>> +
>> +	return length;
>> +}
>> +EXPORT_SYMBOL(hdmi_drm_infoframe_pack_only);
>> +
>> +/**
>> + * hdmi_drm_infoframe_pack() - check a HDMI DRM infoframe,
>> + *                             and write it to binary buffer
>> + * @frame: HDMI DRM infoframe
>> + * @buffer: destination buffer
>> + * @size: size of buffer
>> + *
>> + * Validates that the infoframe is consistent and updates derived
>> +fields
>> + * (eg. length) based on other fields, after which it packs the
>> +information
>> + * contained in the @frame structure into a binary representation
>> +that
>> + * can be written into the corresponding controller registers. This
>> +function
>> + * also computes the checksum as required by section 5.3.5 of the
>> +HDMI 1.4
>> + * specification.
>> + *
>> + * Returns the number of bytes packed into the binary buffer or a
>> +negative
>> + * error code on failure.
>> + */
>> +ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame,
>> +				void *buffer, size_t size)
>> +{
>> +	int ret;
>> +
>> +	ret = hdmi_drm_infoframe_check(frame);
>> +	if (ret)
>> +		return ret;
>> +
>> +	return hdmi_drm_infoframe_pack_only(frame, buffer, size); }
>> +EXPORT_SYMBOL(hdmi_drm_infoframe_pack);
>> +
>>  /*
>>   * hdmi_vendor_any_infoframe_check() - check a vendor infoframe
>>   */
>> @@ -758,6 +899,10 @@ ssize_t hdmi_vendor_infoframe_pack(struct
>hdmi_vendor_infoframe *frame,
>>  		length = hdmi_avi_infoframe_pack_only(&frame->avi,
>>  						      buffer, size);
>>  		break;
>> +	case HDMI_INFOFRAME_TYPE_DRM:
>> +		length = hdmi_drm_infoframe_pack_only(&frame->drm,
>> +						      buffer, size);
>> +		break;
>>  	case HDMI_INFOFRAME_TYPE_SPD:
>>  		length = hdmi_spd_infoframe_pack_only(&frame->spd,
>>  						      buffer, size);
>> @@ -806,6 +951,9 @@ ssize_t hdmi_vendor_infoframe_pack(struct
>hdmi_vendor_infoframe *frame,
>>  	case HDMI_INFOFRAME_TYPE_AVI:
>>  		length = hdmi_avi_infoframe_pack(&frame->avi, buffer, size);
>>  		break;
>> +	case HDMI_INFOFRAME_TYPE_DRM:
>> +		length = hdmi_drm_infoframe_pack(&frame->drm, buffer, size);
>> +		break;
>>  	case HDMI_INFOFRAME_TYPE_SPD:
>>  		length = hdmi_spd_infoframe_pack(&frame->spd, buffer, size);
>>  		break;
>> @@ -838,6 +986,8 @@ static const char *hdmi_infoframe_type_get_name(enum
>hdmi_infoframe_type type)
>>  		return "Source Product Description (SPD)";
>>  	case HDMI_INFOFRAME_TYPE_AUDIO:
>>  		return "Audio";
>> +	case HDMI_INFOFRAME_TYPE_DRM:
>> +		return "Dynamic Range and Mastering";
>>  	}
>>  	return "Reserved";
>>  }
>> @@ -1284,6 +1434,40 @@ static void hdmi_audio_infoframe_log(const char
>*level,
>>  			frame->downmix_inhibit ? "Yes" : "No");  }
>>
>> +/**
>> + * hdmi_drm_infoframe_log() - log info of HDMI DRM infoframe
>> + * @level: logging level
>> + * @dev: device
>> + * @frame: HDMI DRM infoframe
>> + */
>> +static void hdmi_drm_infoframe_log(const char *level,
>> +				   struct device *dev,
>> +				   const struct hdmi_drm_infoframe *frame) {
>> +	int i;
>> +
>> +	hdmi_infoframe_log_header(level, dev,
>> +				  (struct hdmi_any_infoframe *)frame);
>> +	hdmi_log("length: %d\n", frame->length);
>> +	hdmi_log("metadata type: %d\n", frame->metadata_type);
>> +	hdmi_log("eotf: %d\n", frame->eotf);
>> +	for (i = 0; i < 3; i++) {
>> +		hdmi_log("x[%d]: %d\n", i, frame->display_primaries[i].x);
>> +		hdmi_log("y[%d]: %d\n", i, frame->display_primaries[i].y);
>> +	}
>> +
>> +	hdmi_log("white point x: %d\n", frame->white_point.x);
>> +	hdmi_log("white point y: %d\n", frame->white_point.y);
>> +
>> +	hdmi_log("max_display_mastering_luminance: %d\n",
>> +		 frame->max_display_mastering_luminance);
>> +	hdmi_log("min_display_mastering_luminance: %d\n",
>> +		 frame->min_display_mastering_luminance);
>> +
>> +	hdmi_log("max_cll: %d\n", frame->max_cll);
>> +	hdmi_log("max_fall: %d\n", frame->max_fall); }
>> +
>>  static const char *
>>  hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)  { @@
>> -1372,6 +1556,9 @@ void hdmi_infoframe_log(const char *level,
>>  	case HDMI_INFOFRAME_TYPE_VENDOR:
>>  		hdmi_vendor_any_infoframe_log(level, dev, &frame->vendor);
>>  		break;
>> +	case HDMI_INFOFRAME_TYPE_DRM:
>> +		hdmi_drm_infoframe_log(level, dev, &frame->drm);
>> +		break;
>>  	}
>>  }
>>  EXPORT_SYMBOL(hdmi_infoframe_log);
>> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index
>> 9d3b5b9..4ba56f5 100644
>> --- a/include/drm/drm_edid.h
>> +++ b/include/drm/drm_edid.h
>> @@ -25,6 +25,7 @@
>>
>>  #include <linux/types.h>
>>  #include <linux/hdmi.h>
>> +#include <drm/drm_mode.h>
>>
>>  struct drm_device;
>>  struct i2c_adapter;
>> @@ -370,6 +371,10 @@ int drm_av_sync_delay(struct drm_connector *connector,
>>  				   const struct drm_display_mode *mode,
>>  				   enum hdmi_quantization_range rgb_quant_range);
>>
>> +int
>> +drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame,
>> +				    const struct hdr_output_metadata
>*hdr_metadata);
>> +
>>  /**
>>   * drm_eld_mnl - Get ELD monitor name length in bytes.
>>   * @eld: pointer to an eld memory structure with mnl set diff --git
>> a/include/linux/hdmi.h b/include/linux/hdmi.h index 6780476..7edafcf
>> 100644
>> --- a/include/linux/hdmi.h
>> +++ b/include/linux/hdmi.h
>> @@ -47,6 +47,7 @@ enum hdmi_infoframe_type {
>>  	HDMI_INFOFRAME_TYPE_AVI = 0x82,
>>  	HDMI_INFOFRAME_TYPE_SPD = 0x83,
>>  	HDMI_INFOFRAME_TYPE_AUDIO = 0x84,
>> +	HDMI_INFOFRAME_TYPE_DRM = 0x87,
>>  };
>>
>>  #define HDMI_IEEE_OUI 0x000c03
>> @@ -185,12 +186,37 @@ struct hdmi_avi_infoframe {
>>  	unsigned short right_bar;
>>  };
>>
>> +/* DRM Infoframe as per CTA 861.G spec */ struct hdmi_drm_infoframe {
>> +	enum hdmi_infoframe_type type;
>> +	unsigned char version;
>> +	unsigned char length;
>> +	enum hdmi_eotf eotf;
>> +	enum hdmi_metadata_type 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;
>> +};
>> +
>>  int hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame);
>> ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, void *buffer,
>>  				size_t size);
>>  ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame,
>>  				     void *buffer, size_t size);
>>  int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame);
>> +int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame);
>> +ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame, void
>*buffer,
>> +				size_t size);
>> +ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
>> +				     void *buffer, size_t size);
>> +int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame);
>>
>>  enum hdmi_spd_sdi {
>>  	HDMI_SPD_SDI_UNKNOWN,
>> @@ -381,6 +407,7 @@ ssize_t hdmi_vendor_infoframe_pack_only(const struct
>hdmi_vendor_infoframe *fram
>>  	struct hdmi_spd_infoframe spd;
>>  	union hdmi_vendor_any_infoframe vendor;
>>  	struct hdmi_audio_infoframe audio;
>> +	struct hdmi_drm_infoframe drm;
>>  };
>>
>>  ssize_t hdmi_infoframe_pack(union hdmi_infoframe *frame, void
>> *buffer,
>> --
>> 1.9.1
>
>--
>Ville Syrjälä
>Intel