linux-kernel - Re: [PATCH v2 32/34] drm/amd/display: add plane CTM driver-specific property

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Message-ID: <1acac9eb-681b-4de1-bb22-a998bdfb95a2@amd.com>
Date:   Fri, 8 Sep 2023 10:42:59 -0400
From:   Harry Wentland <harry.wentland@....com>
To:     Melissa Wen <mwen@...lia.com>
Cc:     amd-gfx@...ts.freedesktop.org,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        sunpeng.li@....com, Alex Deucher <alexander.deucher@....com>,
        dri-devel@...ts.freedesktop.org, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...il.com, daniel@...ll.ch,
        Joshua Ashton <joshua@...ggi.es>,
        Sebastian Wick <sebastian.wick@...hat.com>,
        Xaver Hugl <xaver.hugl@...il.com>,
        Shashank Sharma <Shashank.Sharma@....com>,
        Nicholas Kazlauskas <nicholas.kazlauskas@....com>,
        sungjoon.kim@....com, Alex Hung <alex.hung@....com>,
        Pekka Paalanen <pekka.paalanen@...labora.com>,
        Simon Ser <contact@...rsion.fr>, kernel-dev@...lia.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 32/34] drm/amd/display: add plane CTM driver-specific
 property



On 2023-09-08 10:41, Melissa Wen wrote:
> On 09/06, Harry Wentland wrote:
>>
>>
>> On 2023-08-10 12:03, Melissa Wen wrote:
>>> Plane CTM for pre-blending color space conversion. Only enable
>>> driver-specific plane CTM property on drivers that support both pre- and
>>> post-blending gamut remap matrix, i.e., DCN3+ family. Otherwise it
>>> conflits with DRM CRTC CTM property.
>>>
>>> Signed-off-by: Melissa Wen <mwen@...lia.com>
>>> ---
>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h      |  2 ++
>>>   .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  7 +++++++
>>>   .../amd/display/amdgpu_dm/amdgpu_dm_color.c   |  7 +++++++
>>>   .../amd/display/amdgpu_dm/amdgpu_dm_plane.c   | 20 +++++++++++++++++++
>>>   4 files changed, 36 insertions(+)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
>>> index abb871a912d7..84bf501b02f4 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
>>> @@ -363,6 +363,8 @@ struct amdgpu_mode_info {
>>>   	 * @plane_hdr_mult_property:
>>>   	 */
>>>   	struct drm_property *plane_hdr_mult_property;
>>> +
>>> +	struct drm_property *plane_ctm_property;
>>>   	/**
>>>   	 * @shaper_lut_property: Plane property to set pre-blending shaper LUT
>>>   	 * that converts color content before 3D LUT.
>>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
>>> index 095f39f04210..6252ee912a63 100644
>>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
>>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
>>> @@ -769,6 +769,13 @@ struct dm_plane_state {
>>>   	 * S31.32 sign-magnitude.
>>>   	 */
>>>   	__u64 hdr_mult;
>>> +	/**
>>> +	 * @ctm:
>>> +	 *
>>> +	 * Color transformation matrix. See drm_crtc_enable_color_mgmt(). The
>>> +	 * blob (if not NULL) is a &struct drm_color_ctm.
>>> +	 */
>>> +	struct drm_property_blob *ctm;
>>>   	/**
>>>   	 * @shaper_lut: shaper lookup table blob. The blob (if not NULL) is an
>>>   	 * array of &struct drm_color_lut.
>>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
>>> index 4356846a2bce..86a918ab82be 100644
>>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
>>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
>>> @@ -218,6 +218,13 @@ amdgpu_dm_create_color_properties(struct amdgpu_device *adev)
>>>   		return -ENOMEM;
>>>   	adev->mode_info.plane_hdr_mult_property = prop;
>>>   
>>> +	prop = drm_property_create(adev_to_drm(adev),
>>> +				   DRM_MODE_PROP_BLOB,
>>> +				   "AMD_PLANE_CTM", 0);
>>
>> We'll want to wrap the property creation/attachment with
>> #ifdef AMD_PRIVATE_COLOR here as well.
> 
> yeah, it's already wrapped because it's created and attached together
> with the other properties.
> 

Ah, I missed that. All good then.

Reviewed-by: Harry Wentland <harry.wentland@....com>

Harry

>>
>> Harry
>>
>>> +	if (!prop)
>>> +		return -ENOMEM;
>>> +	adev->mode_info.plane_ctm_property = prop;
>>> +
>>>   	prop = drm_property_create(adev_to_drm(adev),
>>>   				   DRM_MODE_PROP_BLOB,
>>>   				   "AMD_PLANE_SHAPER_LUT", 0);
>>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
>>> index 3fd57de7c5be..0b1081c690cb 100644
>>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
>>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
>>> @@ -1355,6 +1355,8 @@ dm_drm_plane_duplicate_state(struct drm_plane *plane)
>>>   
>>>   	if (dm_plane_state->degamma_lut)
>>>   		drm_property_blob_get(dm_plane_state->degamma_lut);
>>> +	if (dm_plane_state->ctm)
>>> +		drm_property_blob_get(dm_plane_state->ctm);
>>>   	if (dm_plane_state->shaper_lut)
>>>   		drm_property_blob_get(dm_plane_state->shaper_lut);
>>>   	if (dm_plane_state->lut3d)
>>> @@ -1436,6 +1438,8 @@ static void dm_drm_plane_destroy_state(struct drm_plane *plane,
>>>   
>>>   	if (dm_plane_state->degamma_lut)
>>>   		drm_property_blob_put(dm_plane_state->degamma_lut);
>>> +	if (dm_plane_state->ctm)
>>> +		drm_property_blob_put(dm_plane_state->ctm);
>>>   	if (dm_plane_state->lut3d)
>>>   		drm_property_blob_put(dm_plane_state->lut3d);
>>>   	if (dm_plane_state->shaper_lut)
>>> @@ -1473,6 +1477,11 @@ dm_atomic_plane_attach_color_mgmt_properties(struct amdgpu_display_manager *dm,
>>>   				   dm->adev->mode_info.plane_hdr_mult_property,
>>>   				   AMDGPU_HDR_MULT_DEFAULT);
>>>   
>>> +	/* Only enable plane CTM if both DPP and MPC gamut remap is available. */
>>> +	if (dm->dc->caps.color.mpc.gamut_remap)
>>> +		drm_object_attach_property(&plane->base,
>>> +					   dm->adev->mode_info.plane_ctm_property, 0);
>>> +
>>>   	if (dpp_color_caps.hw_3d_lut) {
>>>   		drm_object_attach_property(&plane->base,
>>>   					   mode_info.plane_shaper_lut_property, 0);
>>> @@ -1530,6 +1539,14 @@ dm_atomic_plane_set_property(struct drm_plane *plane,
>>>   			dm_plane_state->hdr_mult = val;
>>>   			dm_plane_state->base.color_mgmt_changed = 1;
>>>   		}
>>> +	} else if (property == adev->mode_info.plane_ctm_property) {
>>> +		ret = drm_property_replace_blob_from_id(plane->dev,
>>> +							&dm_plane_state->ctm,
>>> +							val,
>>> +							sizeof(struct drm_color_ctm), -1,
>>> +							&replaced);
>>> +		dm_plane_state->base.color_mgmt_changed |= replaced;
>>> +		return ret;
>>>   	} else if (property == adev->mode_info.plane_shaper_lut_property) {
>>>   		ret = drm_property_replace_blob_from_id(plane->dev,
>>>   							&dm_plane_state->shaper_lut,
>>> @@ -1591,6 +1608,9 @@ dm_atomic_plane_get_property(struct drm_plane *plane,
>>>   		*val = dm_plane_state->degamma_tf;
>>>   	} else if (property == adev->mode_info.plane_hdr_mult_property) {
>>>   		*val = dm_plane_state->hdr_mult;
>>> +	} else if (property == adev->mode_info.plane_ctm_property) {
>>> +		*val = (dm_plane_state->ctm) ?
>>> +			dm_plane_state->ctm->base.id : 0;
>>>   	} else 	if (property == adev->mode_info.plane_shaper_lut_property) {
>>>   		*val = (dm_plane_state->shaper_lut) ?
>>>   			dm_plane_state->shaper_lut->base.id : 0;
>>