>-----Original Message-----
>From: Sharma, Shashank
>Sent: Friday, December 21, 2018 2:11 PM
>To: Shankar, Uma <uma.shankar@xxxxxxxxx>; intel-gfx@xxxxxxxxxxxxxxxxxxxxx;
>dri-devel@xxxxxxxxxxxxxxxxxxxxx
>Cc: Lankhorst, Maarten <maarten.lankhorst@xxxxxxxxx>; Syrjala, Ville
><ville.syrjala@xxxxxxxxx>; Brian.Starkey@xxxxxxx
>Subject: Re: [v2 08/14] drm: Enable HDR infoframe support
>
>Regards
>
>Shashank
>
>
>On 12/12/2018 2:08 AM, 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.
>>
>> v2: Rebase and added Ville's POC changes.
>>
>> Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
>> ---
>> drivers/gpu/drm/drm_edid.c | 58 ++++++++++++++++++++
>> drivers/video/hdmi.c | 129
>+++++++++++++++++++++++++++++++++++++++++++++
>> include/drm/drm_edid.h | 4 ++
>> include/linux/hdmi.h | 22 ++++++++
>> 4 files changed, 213 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
>> index 344d8c1..5a7fc9b 100644
>> --- a/drivers/gpu/drm/drm_edid.c
>> +++ b/drivers/gpu/drm/drm_edid.c
>> @@ -4916,6 +4916,64 @@ void drm_set_preferred_mode(struct
>drm_connector *connector,
>> EXPORT_SYMBOL(drm_set_preferred_mode);
>>
>> /**
>> + * drm_hdmi_infoframe_set_hdr_metadata() - fill an HDMI AVI infoframe with
>> + * HDR metadata from userspace
>> + * @frame: HDMI AVI infoframe
>> + * @hdr_source_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,
>> + void *hdr_metadata)
>> +{
>> + struct hdr_static_metadata *hdr_source_metadata;
>> + int err, i;
>> +
>> + 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);
>> +
>> + hdr_source_metadata = (struct hdr_static_metadata *)hdr_metadata;
>> +
>> + frame->length = sizeof(struct hdr_static_metadata);
>> +
>> +
>> + frame->eotf = hdr_source_metadata->eotf;
>> + frame->metadata_type = hdr_source_metadata->metadata_type;
>> +
>> + for (i = 0; i < 3; i++) {
>> + frame->display_primaries[i].x =
>> + hdr_source_metadata->display_primaries[i].x;
>> + frame->display_primaries[i].y =
>> + hdr_source_metadata->display_primaries[i].y;
>> + }
>> +
>> + frame->white_point.x = hdr_source_metadata->white_point.x;
>> + frame->white_point.y = hdr_source_metadata->white_point.y;
>> +
>> + frame->max_mastering_display_luminance =
>> + hdr_source_metadata->max_mastering_display_luminance;
>> + frame->min_mastering_display_luminance =
>> + hdr_source_metadata->min_mastering_display_luminance;
>> +
>> + frame->max_cll = hdr_source_metadata->max_cll;
>> + frame->max_fall = hdr_source_metadata->max_fall;
>> +
>> + hdmi_infoframe_log(KERN_CRIT, NULL,
>> + (union hdmi_infoframe *)frame);
>> +
>> + 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..0937c8c 100644
>> --- a/drivers/video/hdmi.c
>> +++ b/drivers/video/hdmi.c
>> @@ -650,6 +650,93 @@ 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;
>> +
>> + return 0;
>> +}
>> +EXPORT_SYMBOL(hdmi_drm_infoframe_init);
>> +
>> +/**
>> + * hdmi_drm_infoframe_pack() - 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(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 & 0xff;
>As ptr is a u8 ptr, & 0xff is not required, it will take lower 8 bits only.
I feel keeping the mask will make it clearer and avoid any ambiguity.
I can update and drop this if you suggest that way.
Regards,
Uma Shankar
>> + *ptr++ = frame->display_primaries[i].x >> 8;
>> + *ptr++ = frame->display_primaries[i].y & 0xff;
>Same here and below all the places.
>> + *ptr++ = frame->display_primaries[i].y >> 8;
>> + }
>> +
>> + *ptr++ = frame->white_point.x & 0xff;
>> + *ptr++ = frame->white_point.x >> 8;
>> +
>> + *ptr++ = frame->white_point.y & 0xff;
>> + *ptr++ = frame->white_point.y >> 8;
>> +
>> + *ptr++ = frame->max_mastering_display_luminance & 0xff;
>> + *ptr++ = frame->max_mastering_display_luminance >> 8;
>> +
>> + *ptr++ = frame->min_mastering_display_luminance & 0xff;
>> + *ptr++ = frame->min_mastering_display_luminance >> 8;
>> +
>> + *ptr++ = frame->max_cll & 0xff;
>> + *ptr++ = frame->max_cll >> 8;
>> +
>> + *ptr++ = frame->max_fall & 0xff;
>> + *ptr++ = frame->max_fall >> 8;
>> +
>> + hdmi_infoframe_set_checksum(buffer, length);
>> +
>> + return length;
>> +}
>> +
>> /*
>> * hdmi_vendor_any_infoframe_check() - check a vendor infoframe
>> */
>> @@ -806,6 +893,9 @@ 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 +928,8 @@ 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 +1376,40 @@ 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,
>> + 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_mastering_display_luminance: %d\n",
>> + frame->max_mastering_display_luminance);
>> + hdmi_log("min_mastering_display_luminance: %d\n",
>> + frame->min_mastering_display_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 +1498,9 @@ 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
>> e3c4048..0511607 100644
>> --- a/include/drm/drm_edid.h
>> +++ b/include/drm/drm_edid.h
>> @@ -365,6 +365,10 @@ int drm_av_sync_delay(struct drm_connector
>*connector,
>> bool rgb_quant_range_selectable,
>> bool is_hdmi2_sink);
>>
>> +int
>> +drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame,
>> + void *hdr_source_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 bed3e08..ce00e1e
>> 100644
>> --- a/include/linux/hdmi.h
>> +++ b/include/linux/hdmi.h
>> @@ -32,6 +32,7 @@ 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
>> @@ -170,12 +171,32 @@ struct hdmi_avi_infoframe {
>> unsigned short right_bar;
>> };
>>
>> +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 {
>> + uint16_t x, y;
>> + } display_primaries[3];
>> + struct {
>> + uint16_t x, y;
>> + } white_point;
>> + uint16_t max_mastering_display_luminance;
>> + uint16_t min_mastering_display_luminance;
>> + uint16_t max_fall;
>> + uint16_t max_cll;
>> + uint16_t min_cll;
>> +};
>> +
>> 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);
>>
>> enum hdmi_spd_sdi {
>> HDMI_SPD_SDI_UNKNOWN,
>> @@ -350,6 +371,7 @@ 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,
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