<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> </head> <body> <div style="font-family: Aptos, -apple-system, HelveticaNeue, sans-serif;font-size: 12pt"> <div dir="ltr" style="font-family: Aptos, Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt;"> Hello,</div> <div dir="ltr" style="font-family: Aptos, Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt;"> <br> </div> <div dir="ltr" style="font-family: Aptos, Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt;"> What actually is this OETF? Is it power 1/2.4? Or reversed BT.1886?</div> <div dir="ltr" style="font-family: Aptos, Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt;"> <br> </div> <div dir="ltr" style="font-family: Aptos, Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt;"> Best regards,</div> <div dir="ltr" style="font-family: Aptos, Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt;"> Shengyu </div> </div> <div id="ms-outlook-mobile-body-separator-line" style="font-family: Aptos, -apple-system, HelveticaNeue, sans-serif;font-size: 12pt" dir="auto"> <br> </div> <div id="ms-outlook-mobile-signature" style="font-family: Aptos, -apple-system, HelveticaNeue, sans-serif;font-size: 12pt"> <div></div> </div> <hr style="display:inline-block;width:98%" tabindex="-1"> <div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>发件人:</b> amd-gfx <amd-gfx-bounces@lists.freedesktop.org> 代表 Alex Hung <alex.hung@amd.com><br> <b>发送时间:</b> Friday, August 15, 2025 11:50:20 AM<br> <b>收件人:</b> dri-devel@lists.freedesktop.org <dri-devel@lists.freedesktop.org>; amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org><br> <b>抄送:</b> wayland-devel@lists.freedesktop.org <wayland-devel@lists.freedesktop.org>; harry.wentland@amd.com <harry.wentland@amd.com>; alex.hung@amd.com <alex.hung@amd.com>; leo.liu@amd.com <leo.liu@amd.com>; ville.syrjala@linux.intel.com <ville.syrjala@linux.intel.com>; pekka.paalanen@collabora.com <pekka.paalanen@collabora.com>; contact@emersion.fr <contact@emersion.fr>; mwen@igalia.com <mwen@igalia.com>; jadahl@redhat.com <jadahl@redhat.com>; sebastian.wick@redhat.com <sebastian.wick@redhat.com>; shashank.sharma@amd.com <shashank.sharma@amd.com>; agoins@nvidia.com <agoins@nvidia.com>; joshua@froggi.es <joshua@froggi.es>; mdaenzer@redhat.com <mdaenzer@redhat.com>; aleixpol@kde.org <aleixpol@kde.org>; xaver.hugl@gmail.com <xaver.hugl@gmail.com>; victoria@system76.com <victoria@system76.com>; daniel@ffwll.ch <daniel@ffwll.ch>; uma.shankar@intel.com <uma.shankar@intel.com>; quic_naseer@quicinc.com <quic_naseer@quicinc.com>; quic_cbraga@quicinc.com <quic_cbraga@quicinc.com>; quic_abhinavk@quicinc.com <quic_abhinavk@quicinc.com>; marcan@marcan.st <marcan@marcan.st>; Liviu.Dudau@arm.com <Liviu.Dudau@arm.com>; sashamcintosh@google.com <sashamcintosh@google.com>; chaitanya.kumar.borah@intel.com <chaitanya.kumar.borah@intel.com>; louis.chauvet@bootlin.com <louis.chauvet@bootlin.com>; mcanal@igalia.com <mcanal@igalia.com>; nfraprado@collabora.com <nfraprado@collabora.com>; Daniel Stone <daniels@collabora.com><br> <b>主题:</b> [PATCH V11 31/47] drm/colorop: add BT2020/BT709 OETF and Inverse OETF</font> <div> </div> </div> <div class="BodyFragment"><font size="2"><span style="font-size:11pt;"> <div class="PlainText">From: Harry Wentland <harry.wentland@amd.com><br> <br> The BT.709 and BT.2020 OETFs are the same, the only difference<br> being that the BT.2020 variant is defined with more precision<br> for 10 and 12-bit per color encodings.<br> <br> Both are used as encoding functions for video content, and are<br> therefore defined as OETF (opto-electronic transfer function)<br> instead of as EOTF (electro-optical transfer function).<br> <br> Signed-off-by: Alex Hung <alex.hung@amd.com><br> Signed-off-by: Harry Wentland <harry.wentland@amd.com><br> Reviewed-by: Daniel Stone <daniels@collabora.com><br> Reviewed-by: Simon Ser <contact@emersion.fr><br> ---<br> v9:<br> - Move DRM_COLOROP_1D_CURVE_BT2020_* from middle to end (Simon Ser)<br> <br> drivers/gpu/drm/drm_colorop.c | 2 ++<br> include/drm/drm_colorop.h | 23 +++++++++++++++++++++++<br> 2 files changed, 25 insertions(+)<br> <br> diff --git a/drivers/gpu/drm/drm_colorop.c b/drivers/gpu/drm/drm_colorop.c<br> index 5bb45963fa1f..c245a3ff45d3 100644<br> --- a/drivers/gpu/drm/drm_colorop.c<br> +++ b/drivers/gpu/drm/drm_colorop.c<br> @@ -72,6 +72,8 @@ static const char * const colorop_curve_1d_type_names[] = {<br> [DRM_COLOROP_1D_CURVE_SRGB_INV_EOTF] = "sRGB Inverse EOTF",<br> [DRM_COLOROP_1D_CURVE_PQ_125_EOTF] = "PQ 125 EOTF",<br> [DRM_COLOROP_1D_CURVE_PQ_125_INV_EOTF] = "PQ 125 Inverse EOTF",<br> + [DRM_COLOROP_1D_CURVE_BT2020_INV_OETF] = "BT.2020 Inverse OETF",<br> + [DRM_COLOROP_1D_CURVE_BT2020_OETF] = "BT.2020 OETF",<br> };<br> <br> <br> diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h<br> index a38c90f61dc6..c6d2b289e3cf 100644<br> --- a/include/drm/drm_colorop.h<br> +++ b/include/drm/drm_colorop.h<br> @@ -83,6 +83,29 @@ enum drm_colorop_curve_1d_type {<br> */<br> DRM_COLOROP_1D_CURVE_PQ_125_INV_EOTF,<br> <br> + /**<br> + * @DRM_COLOROP_1D_CURVE_BT2020_INV_OETF:<br> + *<br> + * enum string "BT.2020 Inverse OETF"<br> + *<br> + * The inverse of &DRM_COLOROP_1D_CURVE_BT2020_OETF<br> + */<br> + DRM_COLOROP_1D_CURVE_BT2020_INV_OETF,<br> +<br> + /**<br> + * @DRM_COLOROP_1D_CURVE_BT2020_OETF:<br> + *<br> + * enum string "BT.2020 OETF"<br> + *<br> + * The BT.2020/BT.709 transfer function. The BT.709 and BT.2020<br> + * transfer functions are the same, the only difference is that<br> + * BT.2020 is defined with more precision for 10 and 12-bit<br> + * encodings.<br> + *<br> + *<br> + */<br> + DRM_COLOROP_1D_CURVE_BT2020_OETF,<br> +<br> /**<br> * @DRM_COLOROP_1D_CURVE_COUNT:<br> *<br> -- <br> 2.43.0<br> <br> </div> </span></font></div> </body> </html>