> -----Original Message-----
> From: Shankar, Uma
> Sent: Monday, March 11, 2019 9:28 AM
> To: intel-...@lists.freedesktop.org; dri-devel@lists.freedesktop.org
> Cc: Lankhorst, Maarten <maarten.lankho...@intel.com>; Syrjala, Ville
> <ville.syrj...@intel.com>; Sharma, Shashank <shashank.sha...@intel.com>;
> emil.l.veli...@gmail.com; brian.star...@arm.com; liviu.du...@arm.com; Shankar,
> Uma <uma.shan...@intel.com>
> Subject: [v5 02/13] drm: Parse HDR metadata info from EDID
>
> HDR metadata block is introduced in CEA-861.3 spec.
> Parsing the same to get the panel's HDR metadata.
>
> v2: Rebase and added Ville's POC changes to the patch.
>
> v3: No Change
>
> v4: Addressed Shashank's review comments
>
> Signed-off-by: Uma Shankar <uma.shan...@intel.com>
> ---
> drivers/gpu/drm/drm_edid.c | 52
> ++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 52 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index
> 5f14253..c5a81b8 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -2834,6 +2834,7 @@ static int drm_cvt_modes(struct drm_connector
> *connector,
> #define VIDEO_BLOCK 0x02
> #define VENDOR_BLOCK 0x03
> #define SPEAKER_BLOCK 0x04
> +#define HDR_STATIC_METADATA_BLOCK 0x6
> #define USE_EXTENDED_TAG 0x07
> #define EXT_VIDEO_CAPABILITY_BLOCK 0x00
> #define EXT_VIDEO_DATA_BLOCK_420 0x0E
> @@ -3581,6 +3582,12 @@ static int add_3d_struct_modes(struct drm_connector
> *connector, u16 structure, }
>
> static int
> +cea_db_payload_len_ext(const u8 *db)
> +{
> + return (db[0] & 0x1f) - 1;
You might have already checked with checkpatch, but can we cross check the
space before '-' ?
> +}
> +
> +static int
> cea_db_extended_tag(const u8 *db)
> {
> return db[1];
> @@ -3816,6 +3823,49 @@ static void fixup_detailed_cea_mode_clock(struct
> drm_display_mode *mode)
> mode->clock = clock;
> }
>
> +static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db) {
> + if (cea_db_tag(db) != USE_EXTENDED_TAG)
> + return false;
> +
> + if (db[1] != HDR_STATIC_METADATA_BLOCK)
same here, looks like we need spaces around !=, or may be this is due to my
mail client ?
> + return false;
> +
> + return true;
> +}
> +
> +static uint8_t eotf_supported(const u8 *edid_ext) {
> +
> + return edid_ext[2] &
> + (BIT(HDMI_EOTF_TRADITIONAL_GAMMA_SDR) |
> + BIT(HDMI_EOTF_TRADITIONAL_GAMMA_HDR) |
Again, space before the '|' sign, please excuse me if this is false alarm ...
> + BIT(HDMI_EOTF_SMPTE_ST2084));
> +
> +}
> +
> +static uint8_t hdr_metadata_type(const u8 *edid_ext) {
> +
> + return edid_ext[3] &
> + BIT(HDMI_STATIC_METADATA_TYPE1);
> +}
> +
> +static void
> +drm_parse_hdr_metadata_block(struct drm_connector *connector, const u8
> +*db) {
Shouldn't this variable go to line above ?
> + uint16_t len;
> +
> + len = cea_db_payload_len_ext(db);
> + connector->hdr_metadata.eotf = eotf_supported(db);
> + connector->hdr_metadata.metadata_type = hdr_metadata_type(db);
> +
> + if (len >= 5)
> + connector->hdr_metadata.max_fall = db[5];
> + if (len >= 4)
> + connector->hdr_metadata.max_cll = db[4]; }
This '}' certainly should not be here.
> +
> static void
> drm_parse_hdmi_vsdb_audio(struct drm_connector *connector, const u8 *db) {
> @@
> -4443,6 +4493,8 @@ static void drm_parse_cea_ext(struct drm_connector
> *connector,
> drm_parse_y420cmdb_bitmap(connector, db);
> if (cea_db_is_vcdb(db))
> drm_parse_vcdb(connector, db);
> + if (cea_db_is_hdmi_hdr_metadata_block(db))
> + drm_parse_hdr_metadata_block(connector, db);
- Shashank
> }
> }
>
> --
> 1.9.1
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