From: Werner Sembach <wse@tuxedocomputers.com>
To: Pekka Paalanen <ppaalanen@gmail.com>
Cc: amd-gfx@lists.freedesktop.org, tzimmermann@suse.de,
intel-gfx@lists.freedesktop.org, sunpeng.li@amd.com,
dri-devel@lists.freedesktop.org, joonas.lahtinen@linux.intel.com,
maarten.lankhorst@linux.intel.com, linux-kernel@vger.kernel.org,
mripard@kernel.org, airlied@linux.ie,
jani.nikula@linux.intel.com, daniel@ffwll.ch,
rodrigo.vivi@intel.com, alexander.deucher@amd.com,
harry.wentland@amd.com, christian.koenig@amd.com
Subject: Re: [PATCH v4 17/17] drm/amd/display: Add handling for new "Broadcast RGB" property
Date: Tue, 22 Jun 2021 11:28:57 +0200 [thread overview]
Message-ID: <ded3d448-4837-f38d-9878-f5d764712db7@tuxedocomputers.com> (raw)
In-Reply-To: <20210622102955.1e0488b1@eldfell>
Am 22.06.21 um 09:29 schrieb Pekka Paalanen:
> On Fri, 18 Jun 2021 11:11:16 +0200
> Werner Sembach <wse@tuxedocomputers.com> wrote:
>
>> This commit implements the "Broadcast RGB" drm property for the AMD GPU
>> driver.
>>
>> Signed-off-by: Werner Sembach <wse@tuxedocomputers.com>
>> ---
>> .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 22 ++++++++++++++-----
>> .../display/amdgpu_dm/amdgpu_dm_mst_types.c | 4 ++++
>> 2 files changed, 21 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> index 9ffd2f9d3d75..c5dbf948a47a 100644
>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> @@ -5252,7 +5252,8 @@ get_aspect_ratio(const struct drm_display_mode *mode_in)
>> }
>>
>> static enum dc_color_space
>> -get_output_color_space(const struct dc_crtc_timing *dc_crtc_timing)
>> +get_output_color_space(const struct dc_crtc_timing *dc_crtc_timing,
>> + enum drm_mode_color_range preferred_color_range)
>> {
>> enum dc_color_space color_space = COLOR_SPACE_SRGB;
>>
>> @@ -5267,13 +5268,17 @@ get_output_color_space(const struct dc_crtc_timing *dc_crtc_timing)
>> * respectively
>> */
>> if (dc_crtc_timing->pix_clk_100hz > 270300) {
>> - if (dc_crtc_timing->flags.Y_ONLY)
>> + if (dc_crtc_timing->flags.Y_ONLY
>> + || preferred_color_range ==
>> + DRM_MODE_COLOR_RANGE_LIMITED_16_235)
>> color_space =
>> COLOR_SPACE_YCBCR709_LIMITED;
>> else
>> color_space = COLOR_SPACE_YCBCR709;
> Hi,
>
> does this mean that amdgpu would be using a property named "Broadcast
> RGB" to control the range of YCbCr too?
Yes, because I avoided creating a new property, but I'm not really happy with it either.
Possibility 1: Use "Broadcast RGB" for Y'CbCr too and clarify in documentation
- still confusing name
- limited does not mean something a little bit different for Y'CbCr and not strictly 16-235:
https://www.kernel.org/doc/html/v5.12/userspace-api/media/v4l/colorspaces-defs.html#c.V4L.v4l2_quantization , but name
of option is given by preexisting property
Possibility 2: Deprecate "Broadcast RGB" and a a more neutral sounding "preferred color range", with the more neutral
sounding "limited" option instead of "Limited 16:235"
- What's the relation between the 2? pq mentioned on the amdgpu gitlab that there is a posibility for userspace to
have only the new or the old one shown
- Alternatively ignore "Broadcast RGB" when "preferred color range" is set and have them coexist?
>
> That is surprising. If this is truly wanted, then the documentation of
> "Broadcast RGB" must say that it applies to YCbCr too.
>
> Does amdgpu do the same as intel wrt. to the question about whose
> responsibility it is to make the pixels at the connector to match the
> set range?
I guess the kernel driver does the conversion, but i have to check for both.
For Intel I did not change the behavior of Boradcast RGB, but i think it's not clearly specified in the docs where the
conversion happens.
>
>
> Thanks,
> pq
>
>> } else {
>> - if (dc_crtc_timing->flags.Y_ONLY)
>> + if (dc_crtc_timing->flags.Y_ONLY
>> + || preferred_color_range ==
>> + DRM_MODE_COLOR_RANGE_LIMITED_16_235)
>> color_space =
>> COLOR_SPACE_YCBCR601_LIMITED;
>> else
>> @@ -5283,7 +5288,10 @@ get_output_color_space(const struct dc_crtc_timing *dc_crtc_timing)
>> }
>> break;
>> case PIXEL_ENCODING_RGB:
>> - color_space = COLOR_SPACE_SRGB;
>> + if (preferred_color_range == DRM_MODE_COLOR_RANGE_LIMITED_16_235)
>> + color_space = COLOR_SPACE_SRGB_LIMITED;
>> + else
>> + color_space = COLOR_SPACE_SRGB;
>> break;
>>
>> default:
>> @@ -5429,7 +5437,10 @@ static void fill_stream_properties_from_drm_display_mode(
>>
>> timing_out->aspect_ratio = get_aspect_ratio(mode_in);
>>
>> - stream->output_color_space = get_output_color_space(timing_out);
>> + stream->output_color_space = get_output_color_space(timing_out,
>> + connector_state ?
>> + connector_state->preferred_color_range :
>> + DRM_MODE_COLOR_RANGE_UNSET);
>>
>> stream->out_transfer_func->type = TF_TYPE_PREDEFINED;
>> stream->out_transfer_func->tf = TRANSFER_FUNCTION_SRGB;
>> @@ -7780,6 +7791,7 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
>> drm_connector_attach_active_bpc_property(&aconnector->base, 8, 16);
>> drm_connector_attach_preferred_color_format_property(&aconnector->base);
>> drm_connector_attach_active_color_format_property(&aconnector->base);
>> + drm_connector_attach_preferred_color_range_property(&aconnector->base);
>> drm_connector_attach_active_color_range_property(&aconnector->base);
>> }
>>
>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
>> index 2563788ba95a..80e1389fd0ec 100644
>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
>> @@ -421,6 +421,10 @@ dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
>> if (connector->active_color_format_property)
>> drm_connector_attach_active_color_format_property(&aconnector->base);
>>
>> + connector->preferred_color_range_property = master->base.preferred_color_range_property;
>> + if (connector->preferred_color_range_property)
>> + drm_connector_attach_preferred_color_range_property(&aconnector->base);
>> +
>> connector->active_color_range_property = master->base.active_color_range_property;
>> if (connector->active_color_range_property)
>> drm_connector_attach_active_color_range_property(&aconnector->base);
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
next prev parent reply other threads:[~2021-06-22 9:29 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-18 9:10 [PATCH v4 00/17] New uAPI drm properties for color management Werner Sembach
2021-06-18 9:11 ` [PATCH v4 01/17] drm/amd/display: Remove unnecessary SIGNAL_TYPE_HDMI_TYPE_A check Werner Sembach
2021-06-18 9:11 ` [PATCH v4 02/17] drm/amd/display: Add missing cases convert_dc_color_depth_into_bpc Werner Sembach
2021-06-18 9:11 ` [PATCH v4 03/17] drm/uAPI: Add "active bpc" as feedback channel for "max bpc" drm property Werner Sembach
2021-06-22 6:46 ` Pekka Paalanen
2021-06-28 17:03 ` Werner Sembach
2021-06-29 11:02 ` Werner Sembach
2021-06-30 8:21 ` Pekka Paalanen
2021-06-30 9:42 ` Werner Sembach
2021-07-01 7:42 ` Pekka Paalanen
2021-07-01 11:30 ` Werner Sembach
2021-07-14 18:18 ` Werner Sembach
2021-07-15 9:10 ` Pekka Paalanen
2021-06-18 9:11 ` [PATCH v4 04/17] drm/amd/display: Add handling for new "active bpc" property Werner Sembach
2021-06-18 9:11 ` [PATCH v4 05/17] drm/i915/display: " Werner Sembach
2021-06-18 9:11 ` [PATCH v4 06/17] drm/uAPI: Add "active color format" drm property as feedback for userspace Werner Sembach
2021-06-22 6:48 ` Pekka Paalanen
2021-06-18 9:11 ` [PATCH v4 07/17] drm/amd/display: Add handling for new "active color format" property Werner Sembach
2021-06-18 9:11 ` [PATCH v4 08/17] drm/i915/display: " Werner Sembach
2021-06-18 9:11 ` [PATCH v4 09/17] drm/uAPI: Add "active color range" drm property as feedback for userspace Werner Sembach
2021-06-22 7:00 ` Pekka Paalanen
2021-06-22 9:50 ` Werner Sembach
2021-06-22 11:48 ` Simon Ser
2021-06-23 7:32 ` Pekka Paalanen
2021-06-23 10:17 ` Werner Sembach
2021-06-23 11:14 ` Pekka Paalanen
2021-06-23 11:19 ` Werner Sembach
2021-06-18 9:11 ` [PATCH v4 10/17] drm/amd/display: Add handling for new "active color range" property Werner Sembach
2021-06-18 9:11 ` [PATCH v4 11/17] drm/i915/display: " Werner Sembach
2021-06-18 9:11 ` [PATCH v4 12/17] drm/uAPI: Add "preferred color format" drm property as setting for userspace Werner Sembach
2021-06-22 7:15 ` Pekka Paalanen
2021-06-29 8:12 ` Simon Ser
2021-06-29 11:17 ` Pekka Paalanen
2021-06-29 11:39 ` Werner Sembach
2021-06-30 8:41 ` Pekka Paalanen
2021-06-30 9:20 ` Werner Sembach
2021-07-01 8:07 ` Pekka Paalanen
2021-07-01 12:50 ` Werner Sembach
2021-07-01 13:24 ` Pekka Paalanen
2021-07-05 15:49 ` Werner Sembach
2021-07-06 7:09 ` Pekka Paalanen
2021-07-14 17:59 ` Werner Sembach
2021-06-18 9:11 ` [PATCH v4 13/17] drm/amd/display: Add handling for new "preferred color format" property Werner Sembach
2021-06-18 9:11 ` [PATCH v4 14/17] drm/i915/display: " Werner Sembach
2021-06-18 9:11 ` [PATCH v4 15/17] drm/uAPI: Move "Broadcast RGB" property from driver specific to general context Werner Sembach
2021-06-22 7:25 ` Pekka Paalanen
2021-06-22 9:57 ` Werner Sembach
2021-06-23 7:48 ` Pekka Paalanen
2021-06-23 10:10 ` Werner Sembach
2021-06-23 11:26 ` Pekka Paalanen
2021-06-25 8:48 ` Werner Sembach
2021-06-18 9:11 ` [PATCH v4 16/17] drm/i915/display: Use the general "Broadcast RGB" implementation Werner Sembach
2021-06-18 9:11 ` [PATCH v4 17/17] drm/amd/display: Add handling for new "Broadcast RGB" property Werner Sembach
2021-06-22 7:29 ` Pekka Paalanen
2021-06-22 9:28 ` Werner Sembach [this message]
2021-06-23 8:01 ` Pekka Paalanen
2021-06-23 9:58 ` Werner Sembach
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