From: Pekka Paalanen <pekka.paalanen@haloniitty.fi>
To: Alex Hung <alex.hung@amd.com>, <harry.wentland@amd.com>
Cc: <dri-devel@lists.freedesktop.org>,
<amd-gfx@lists.freedesktop.org>,
<wayland-devel@lists.freedesktop.org>
Subject: Re: [V7 31/45] drm/colorop: add BT2020/BT709 OETF and Inverse OETF
Date: Fri, 17 Jan 2025 11:06:41 +0200 [thread overview]
Message-ID: <20250117110641.7040f712@eldfell> (raw)
In-Reply-To: <20250116105622.577533fc@tisha>
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On Thu, 16 Jan 2025 10:56:22 +0200
Pekka Paalanen <pekka.paalanen@haloniitty.fi> wrote:
> On Thu, 19 Dec 2024 21:33:37 -0700
> Alex Hung <alex.hung@amd.com> wrote:
>
> > From: Harry Wentland <harry.wentland@amd.com>
> >
> > The BT.709 and BT.2020 OETFs are the same, the only difference
> > being that the BT.2020 variant is defined with more precision
> > for 10 and 12-bit per color encodings.
> >
> > Both are used as encoding functions for video content, and are
> > therefore defined as OETF (opto-electronic transfer function)
> > instead of as EOTF (electro-optical transfer function).
> >
> > Signed-off-by: Alex Hung <alex.hung@amd.com>
> > Signed-off-by: Harry Wentland <harry.wentland@amd.com>
>
> Hi,
>
> why would a display system ever use BT.2020 or BT.709 OETF or its
> inverse?
Sorry, this is more for my own curiosity, not an argument against the
patch. Since hardware designers decided to incorporate these curves
explicitly, what use was in mind? It's likely something I have
overlooked.
Thanks,
pq
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next prev parent reply other threads:[~2025-01-17 9:06 UTC|newest]
Thread overview: 127+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-20 4:33 [V7 00/45] Color Pipeline API w/ VKMS Alex Hung
2024-12-20 4:33 ` [V7 01/45] drm: Add helper for conversion from signed-magnitude Alex Hung
2025-02-24 16:07 ` Louis Chauvet
2025-02-24 18:50 ` Alex Hung
2025-02-25 9:35 ` Louis Chauvet
2024-12-20 4:33 ` [V7 02/45] drm/vkms: Round fixp2int conversion in lerp_u16 Alex Hung
2025-02-24 16:07 ` Louis Chauvet
2025-02-25 9:37 ` Louis Chauvet
2025-02-25 11:28 ` Simon Ser
2025-02-25 14:05 ` Louis Chauvet
2025-02-25 14:43 ` Harry Wentland
2025-02-25 14:45 ` Simon Ser
2025-02-25 16:00 ` Louis Chauvet
2024-12-20 4:33 ` [V7 03/45] drm/vkms: Add kunit tests for VKMS LUT handling Alex Hung
2025-02-24 16:07 ` Louis Chauvet
2025-02-25 9:51 ` Louis Chauvet
2025-02-25 14:45 ` Harry Wentland
2024-12-20 4:33 ` [V7 04/45] drm/doc/rfc: Describe why prescriptive color pipeline is needed Alex Hung
2024-12-20 4:33 ` [V7 05/45] drm/colorop: Introduce new drm_colorop mode object Alex Hung
2025-01-13 8:04 ` Simon Ser
2025-02-24 16:07 ` Louis Chauvet
2025-02-25 10:05 ` Louis Chauvet
2025-02-28 15:55 ` Harry Wentland
2024-12-20 4:33 ` [V7 06/45] drm/colorop: Add TYPE property Alex Hung
2025-01-13 8:05 ` Simon Ser
2025-02-24 16:07 ` Louis Chauvet
2025-02-25 10:07 ` Louis Chauvet
2024-12-20 4:33 ` [V7 07/45] drm/colorop: Add 1D Curve subtype Alex Hung
2025-01-13 8:07 ` Simon Ser
2025-02-24 16:07 ` Louis Chauvet
2025-02-25 10:13 ` Louis Chauvet
2025-02-28 1:07 ` Alex Hung
2025-02-28 9:24 ` Louis Chauvet
2024-12-20 4:33 ` [V7 08/45] Documentation/gpu: document drm_colorop Alex Hung
2025-01-13 8:18 ` Simon Ser
2025-02-10 22:03 ` Harry Wentland
2025-02-15 14:40 ` Simon Ser
2025-02-21 16:18 ` Harry Wentland
2025-02-21 16:42 ` Simon Ser
2025-02-21 18:41 ` Harry Wentland
2025-02-21 18:48 ` Simon Ser
2024-12-20 4:33 ` [V7 09/45] drm/colorop: Add BYPASS property Alex Hung
2025-01-13 17:49 ` Simon Ser
2025-02-24 16:07 ` Louis Chauvet
2025-02-25 10:15 ` Louis Chauvet
2024-12-20 4:33 ` [V7 10/45] drm/colorop: Add NEXT property Alex Hung
2025-01-13 17:54 ` Simon Ser
2025-02-24 16:07 ` Louis Chauvet
2025-02-25 10:21 ` Louis Chauvet
2024-12-20 4:33 ` [V7 11/45] drm/colorop: Add atomic state print for drm_colorop Alex Hung
2025-01-13 17:55 ` Simon Ser
2024-12-20 4:33 ` [V7 12/45] drm/plane: Add COLOR PIPELINE property Alex Hung
2025-01-13 18:08 ` Simon Ser
2024-12-20 4:33 ` [V7 13/45] drm/colorop: Introduce DRM_CLIENT_CAP_PLANE_COLOR_PIPELINE Alex Hung
2025-01-13 18:23 ` Simon Ser
2025-01-22 19:48 ` Harry Wentland
2025-01-22 20:05 ` Simon Ser
2024-12-20 4:33 ` [V7 14/45] drm/vkms: Add enumerated 1D curve colorop Alex Hung
2025-02-25 11:18 ` Louis Chauvet
2025-03-10 19:43 ` Harry Wentland
2024-12-20 4:33 ` [V7 15/45] drm/vkms: Add kunit tests for linear and sRGB LUTs Alex Hung
2025-02-25 11:19 ` Louis Chauvet
2025-03-10 15:09 ` Harry Wentland
2024-12-20 4:33 ` [V7 16/45] drm/colorop: Add 3x4 CTM type Alex Hung
2025-01-13 18:19 ` Simon Ser
2025-02-25 11:20 ` Louis Chauvet
2024-12-20 4:33 ` [V7 17/45] drm/vkms: Use s32 for internal color pipeline precision Alex Hung
2024-12-20 4:33 ` [V7 18/45] drm/vkms: add 3x4 matrix in color pipeline Alex Hung
2025-02-25 11:21 ` Louis Chauvet
2024-12-20 4:33 ` [V7 19/45] drm/tests: Add a few tests around drm_fixed.h Alex Hung
2024-12-20 4:33 ` [V7 20/45] drm/vkms: Add tests for CTM handling Alex Hung
2024-12-20 4:33 ` [V7 21/45] drm/colorop: pass plane_color_pipeline client cap to atomic check Alex Hung
2024-12-20 4:33 ` [V7 22/45] drm/colorop: define a new macro for_each_new_colorop_in_state Alex Hung
2025-01-15 7:48 ` Simon Ser
2024-12-20 4:33 ` [V7 23/45] drm/amd/display: Ignore deprecated props when plane_color_pipeline set Alex Hung
2025-01-15 7:56 ` Simon Ser
2025-01-22 21:05 ` Harry Wentland
2025-01-23 20:29 ` Simon Ser
2024-12-20 4:33 ` [V7 24/45] drm/amd/display: Add bypass COLOR PIPELINE Alex Hung
2024-12-20 4:33 ` [V7 25/45] drm/amd/display: Skip color pipeline initialization for cursor plane Alex Hung
2024-12-20 4:33 ` [V7 26/45] drm/amd/display: Add support for sRGB EOTF in DEGAM block Alex Hung
2025-02-13 15:35 ` Leo Li
2024-12-20 4:33 ` [V7 27/45] drm/amd/display: Add support for sRGB Inverse EOTF in SHAPER block Alex Hung
2024-12-20 4:33 ` [V7 28/45] drm/amd/display: Add support for sRGB EOTF in BLND block Alex Hung
2024-12-20 4:33 ` [V7 29/45] drm/colorop: Add PQ 125 EOTF and its inverse Alex Hung
2025-01-15 8:00 ` Simon Ser
2025-01-23 20:06 ` Harry Wentland
2025-01-23 20:33 ` Simon Ser
2025-01-17 9:04 ` Pekka Paalanen
2025-01-23 20:09 ` Harry Wentland
2024-12-20 4:33 ` [V7 30/45] drm/amd/display: Enable support for PQ 125 EOTF and Inverse Alex Hung
2024-12-20 4:33 ` [V7 31/45] drm/colorop: add BT2020/BT709 OETF and Inverse OETF Alex Hung
2025-01-15 8:04 ` Simon Ser
2025-01-23 20:13 ` Harry Wentland
2025-01-16 8:56 ` Pekka Paalanen
2025-01-17 9:06 ` Pekka Paalanen [this message]
2025-01-23 20:16 ` Harry Wentland
2025-01-27 12:05 ` Pekka Paalanen
2024-12-20 4:33 ` [V7 32/45] drm/amd/display: Add support for BT.709 and BT.2020 TFs Alex Hung
2025-02-12 23:03 ` Leo Li
2024-12-20 4:33 ` [V7 33/45] drm/colorop: Add 1D Curve Custom LUT type Alex Hung
2025-01-15 8:14 ` Simon Ser
2025-01-16 23:33 ` Alex Hung
2025-01-18 13:54 ` Simon Ser
2025-01-15 15:48 ` Simon Ser
2024-12-20 4:33 ` [V7 34/45] drm/amd/display: add shaper and blend colorops for 1D Curve Custom LUT Alex Hung
2025-02-12 23:44 ` Leo Li
2025-02-21 16:28 ` Harry Wentland
2024-12-20 4:33 ` [V7 35/45] drm/amd/display: add 3x4 matrix colorop Alex Hung
2025-02-13 17:16 ` Leo Li
2024-12-20 4:33 ` [V7 36/45] drm/colorop: Add mutliplier type Alex Hung
2025-01-15 15:54 ` Simon Ser
2024-12-20 4:33 ` [V7 37/45] drm/amd/display: add multiplier colorop Alex Hung
2024-12-20 4:33 ` [V7 38/45] drm/amd/display: Swap matrix and multiplier Alex Hung
2024-12-20 4:33 ` [V7 39/45] drm/colorop: Define LUT_1D interpolation Alex Hung
2025-01-20 7:48 ` Simon Ser
2024-12-20 4:33 ` [V7 40/45] drm/colorop: allow non-bypass colorops Alex Hung
2024-12-20 4:33 ` [V7 41/45] drm/colorop: Add 3D LUT supports to color pipeline Alex Hung
2025-01-20 21:16 ` Simon Ser
2024-12-20 4:33 ` [V7 42/45] drm/amd/display: add 3D LUT colorop Alex Hung
2025-02-13 18:21 ` Leo Li
2025-02-21 21:05 ` Harry Wentland
2024-12-20 4:33 ` [V7 43/45] drm/amd/display: Add AMD color pipeline doc Alex Hung
2025-01-17 9:19 ` Pekka Paalanen
2025-01-23 20:52 ` Harry Wentland
2024-12-20 4:33 ` [V7 44/45] drm/colorop: Add kernel doc for data blob Alex Hung
2024-12-20 4:33 ` [V7 45/45] drm/colorop: Add destroy functions for color pipeline Alex Hung
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