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UPSTREAM: drm: Add HLG EOTF

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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.

Change-Id: I6542cb0cb6cfccb92f76aa98df5d054fc1e908d8
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1558015817-12025-8-git-send-email-uma.shankar@intel.com
(cherry picked from commit b5e3eed1ee)
This commit is contained in:
Ville Syrjälä
2019-05-16 19:40:12 +05:30
committed by Tao Huang
parent 7ffbba0d86
commit 1e5987a815
2 changed files with 3 additions and 1 deletions
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3
drivers/gpu/drm/drm_edid.c
View File

@@ -3886,7 +3886,8 @@ 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) |
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)

1
include/linux/hdmi.h
View File

@@ -147,6 +147,7 @@ enum hdmi_eotf {
HDMI_EOTF_TRADITIONAL_GAMMA_SDR,
HDMI_EOTF_TRADITIONAL_GAMMA_HDR,
HDMI_EOTF_SMPTE_ST2084,
HDMI_EOTF_BT_2100_HLG,
};
struct hdmi_avi_infoframe {