On Tue, Jan 08, 2019 at 02:41:25PM +0530, Uma Shankar wrote:
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> 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
>
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> Signed-off-by: Uma Shankar <uma.shan...@intel.com>
> ---
> drivers/gpu/drm/drm_edid.c | 4 ++--
> include/linux/hdmi.h | 1 +
> 2 files changed, 3 insertions(+), 2 deletions(-)
I haven't really looked at this series in depth, but just a quick
drive-by comment: it doesn't look like this patch touches i915, so the
"drm/i915:" headline prefix should probably just be "drm:" and you might
want to move it earlier in the series so that all the core patches come
before all the i915 patches.
Matt
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index df27012..5592c9b 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -3850,8 +3850,8 @@ 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)
> diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
> index ce00e1e..b5346c3 100644
> --- a/include/linux/hdmi.h
> +++ b/include/linux/hdmi.h
> @@ -146,6 +146,7 @@ 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 {
> --
> 1.9.1
>
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--
Matt Roper
Graphics Software Engineer
IoTG Platform Enabling & Development
Intel Corporation
(916) 356-2795
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