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Commit b5e3eed1 authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm: Add HLG EOTF 



ADD HLG EOTF to the list of EOTF transfer functions supported.
Hybrid Log-Gamma (HLG) is a high dynamic range (HDR) standard.
HLG defines a nonlinear transfer function in which the lower
half of the signal values use a gamma curve and the upper half
of the signal values use a logarithmic curve.

v2: Rebase

v3: Fixed a warning message

v4: Addressed Shashank's review comments

v5: Addressed Jonas Karlman's review comment and dropped the i915
tag from header.

Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarUma Shankar <uma.shankar@intel.com>
Reviewed-by: default avatarShashank Sharma <shashank.sharma@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1558015817-12025-8-git-send-email-uma.shankar@intel.com
parent 2cdbfd66

drivers/gpu/drm/drm_edid.c

+2 −1
Original line number Original line Diff line number Diff line
@@ -3854,7 +3854,8 @@ static uint8_t eotf_supported(const u8 *edid_ext) 
	return edid_ext[2] &

	return edid_ext[2] &

		(BIT(HDMI_EOTF_TRADITIONAL_GAMMA_SDR) |

		(BIT(HDMI_EOTF_TRADITIONAL_GAMMA_SDR) |

		 BIT(HDMI_EOTF_TRADITIONAL_GAMMA_HDR) |

		 BIT(HDMI_EOTF_TRADITIONAL_GAMMA_HDR) |

		 BIT(HDMI_EOTF_SMPTE_ST2084));

		 BIT(HDMI_EOTF_SMPTE_ST2084) |

		 BIT(HDMI_EOTF_BT_2100_HLG));

}

}





static uint8_t hdr_metadata_type(const u8 *edid_ext)

static uint8_t hdr_metadata_type(const u8 *edid_ext)

include/linux/hdmi.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -162,6 +162,7 @@ enum hdmi_eotf { 
	HDMI_EOTF_TRADITIONAL_GAMMA_SDR,

	HDMI_EOTF_TRADITIONAL_GAMMA_SDR,

	HDMI_EOTF_TRADITIONAL_GAMMA_HDR,

	HDMI_EOTF_TRADITIONAL_GAMMA_HDR,

	HDMI_EOTF_SMPTE_ST2084,

	HDMI_EOTF_SMPTE_ST2084,

	HDMI_EOTF_BT_2100_HLG,

};

};





struct hdmi_avi_infoframe {

struct hdmi_avi_infoframe {